(Part 2: Test Under Dynamic Transmission Condition)

80-W2112-5 Rev. A

QTI

RF Exp SAR Part 2 TAS Validation Part 1

Motorola Mobility LLC T56AA4 Mobile Cellular Phone IHDT56AA4 IHDT56AA4 t56aa4

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FCC RF Exposure Report

Report No. : FA1N0903A

RF Exposure Report

(Part 2: Test Under Dynamic Transmission Condition)

FCC ID

: IHDT56AA4

Equipment

: Mobile Cellular Phone

Brand Name : Motorola

Model Name Applicantq

: XT2215-2, XT2215-3, XT2215-4, XT2215DL Motorola Mobility LLC
: 222 W,Merchandise Mart Plaza, Chicago IL 60654 USA

We, Sporton International Inc. (Shenzhen), would like to declare that the tested sample has been evaluated in accordance with the test procedures and has been in compliance with the applicable technical standards.
The test results in this report apply exclusively to the tested model / sample. Without written approval of Sporton International Inc. (Shenzhen), the test report shall not be reproduced except in full.

Reviewed by: Hank Huang / Supervisor

Approved by: Johnny Chen / Manager

Sporton International Inc. (Shenzhen)
1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People's Republic of China

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FCC RF Exposure Report
History of this test report

Report No.
FA1N0903A

Version
01

Description
Initial issue of report

Report No. : FA1N0903A
Issued Date Feb. 11, 2022

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FCC RF Exposure Report

Report No. : FA1N0903A

Contents

1 Introduction ........................................................................................................................... 5
2 Tx Varying Transmission Test Cases and Test Proposal .................................................. 6
3 SAR Time Averaging Validation Test Procedures .............................................................. 8
3.1 Test sequence determination for validation ...............................................................................................8 3.2 Test configuration selection criteria for validating Smart Transmit feature .................................................8
3.2.1 Test configuration selection for time-varying Tx power transmission........................................9 3.2.2 Test configuration selection for change in call .......................................................................... 9 3.2.3 Test configuration selection for change in technology/band ..................................................... 9 3.2.4 Test configuration selection for change in DSI ....................................................................... 10 3.2.5 Test configuration selection for SAR exposure switching ....................................................... 10 3.2.6 Test configuration selection for change in time window..........................................................11 3.3 Test procedures for conducted power measurements .............................................................................11 3.3.1 Time-varying Tx power transmission scenario........................................................................11 3.3.2 Change in call scenario .......................................................................................................... 13 3.3.3 Change in technology and band ............................................................................................. 14 3.3.4 Change in antenna ................................................................................................................. 15 3.3.5 Change in DSI ........................................................................................................................ 15 3.3.6 Change in time window........................................................................................................... 16 3.3.7 SAR exposure switching.........................................................................................................17 3.3.8 Change in WIFI/BT Back off ...................................................................................................18 3.4 Test procedure for time-varying SAR measurements ..............................................................................19
4 Test Configurations .............................................................................................................21
4.1 WWAN (sub-6) transmission....................................................................................................................21
5 Conducted Power Test Results for Sub-6 Smart Transmit Feature Validation................27
5.1 Measurement setup .................................................................................................................................27 5.2 Plimit and Pmax measurement results .........................................................................................................30 5.3 Time-varying Tx power measurement results ..........................................................................................31
5.3.1 GSM850 ................................................................................................................................. 32 5.3.2 GSM1900 ............................................................................................................................... 34 5.3.3 WCDMA Band 2 .....................................................................................................................36 5.3.4 WCDMA Band 4 .....................................................................................................................38 5.3.5 LTE Band 7.............................................................................................................................40 5.3.6 LTE Band 25...........................................................................................................................42 5.3.7 5G NR FR1 N25 ..................................................................................................................... 44 5.3.8 5G NR FR1 N77 ..................................................................................................................... 46 5.4 Change in Call Test Results ....................................................................................................................48 5.5 Change in technology/band test results ...................................................................................................49 5.6 Change in DSI test results .......................................................................................................................50 5.7 Change in Time window / antenna switch test results..............................................................................51 5.7.1 Test case 1: transition from LTE Band 7 to LTE Band 48 (i.e., 100s to 60s),
then back to LTE Band 7...................................................................................................51 5.7.2 Test case 2: transition from LTE Band 48 to LTE Band 7 (i.e., 60s to 100s),
then back to LTE Band 48 ................................................................................................. 53 5.8 Switch in SAR exposure test results (EN-DC Combination) ....................................................................55 5.9 Change in WIFI/Bluetooth Back off test results........................................................................................57

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6 SAR Test Results for Sub-6 Smart Transmit Feature Validation ......................................58
6.1 Measurement setup .................................................................................................................................58 6.2 SAR measurement results for time-varying Tx power transmission scenario ..........................................59
6.2.1 GSM850 SAR test results.......................................................................................................60 6.2.2 GSM1900 SAR test results.....................................................................................................62 6.2.3 WCDMA Band 2 SAR test results...........................................................................................64 6.2.4 WCDMA Band 4 SAR test results...........................................................................................66 6.2.6 LTE Band 7 SAR test results .................................................................................................. 68 6.2.7 LTE Band 25 SAR test results ................................................................................................ 70 6.2.8 5G NR FR1 N25 SAR test results...........................................................................................72 6.2.9 5G NR FR1 N77 SA SAR test results ..................................................................................... 74

7 Conclusions .........................................................................................................................75

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FCC RF Exposure Report
1 Introduction

Report No. : FA1N0903A

The equipment under test (EUT) is a portable handset (FCC ID: IHDT56AA4), it contains the Qualcomm modem supporting 2G/3G/4G technologies and 5G NR bands. Both of these modems are enabled with Qualcomm Smart Transmit feature to control and manage transmitting power in real time and to ensure at all times the time-averaged RF exposure is in compliance with the FCC requirement.
This purpose of the Part 2 report is to demonstrate the EUT complies with FCC RF exposure requirement under Tx varying transmission scenarios, thereby validity of Qualcomm Smart Transmit feature for FCC equipment authorization

The Plimit used in this report is determined in Part 1 report.
Refer to PART 1 SAR REPORT, for product description and terminology used in this report.

Test Lab Information

Test Firm Name

Sporton International Inc. (Shenzhen)

Test Firm Information

1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People's Republic of China TEL: +86-755-86379589 FAX: +86-755-86379595

FCC Designation No.

CN1256

Test Firm Registration Number for FCC

421272

Test Site No.

SAR02-SZ

Date of Start during the Test 1/25/2022

Date of End during the Test

2/5/2022

Test Engineers

Johnny Chen

Report Producer

Si Zhang

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2 Tx Varying Transmission Test Cases and Test Proposal

To validate time averaging feature and demonstrate the compliance in Tx varying transmission conditions, the following transmission scenarios are covered in Part 2 test:
1. During a time-varying Tx power transmission: To prove that the Smart Transmit feature accounts for Tx power variations in time accurately.
2. During a call disconnect and re-establish scenario: To prove that the Smart Transmit feature accounts for history of past Tx power transmissions accurately.
3. During technology/band handover: To prove that the Smart Transmit feature functions correctly during transitions in technology/band.
4. During DSI (Device State Index) change: To prove that the Smart Transmit feature functions correctly during transition from one device state (DSI) to another.
5. During antenna (or beam) switch: To prove that the Smart Transmit feature functions correctly during transitions in antenna (such as AsDiv scenario) or beams (different antenna array configurations).
6. SAR exposure switching between two active radios (radio1 and radio2): To prove that the Smart Transmit feature functions correctly and ensures total RF exposure compliance when exposure varies among SAR_radio1 only, SAR_radio1 + SAR_radio2, and SAR_radio2 only scenarios.
As described in Part 1 report, the RF exposure is proportional to the Tx power for a SAR -characterized wireless device. Thus, feature validation in Part 2 can be effectively performed through conducted and radiated power measurement. Therefore, the compliance demonstration under dynamic transmission conditions and feature validation are done in conducted/radiated power measurement setup for transmission scenario 1 through 8.
To add confidence in the feature validation, the time-averaged SAR measurements are also performed but only performed for transmission scenario 1 to avoid the complexity in SAR measurement (such as, for scenario 3 requiring change in SAR probe calibration file to accommodate different bands and/or tissue simulating liquid).
The strategy for testing in Tx varying transmission condition is outlined as follows:
 Demonstrate the total RF exposure averaged over FCC defined time windows does not exceed FCC's SAR limits, through time-averaged power measurements
 Measure conducted Tx power (for f < 6GHz) versus time, and radiated Tx power (EIRP for f > 10GHz) versus time.
 Convert it into RF exposure and divide by respective FCC limits to get normalized exposure versus time.
 Perform running time-averaging over FCC defined time windows.
 Demonstrate that the total normalized time-averaged RF exposure is less than 1 for all transmission scenarios at all times.
Mathematical expression:
 For sub-6 transmission only:

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FCC RF Exposure Report ( )
(1a)

Report No. : FA1N0903A
( )



( )

(1b)

where,

( ),

, and

correspond to the measured instantaneous

conducted Tx power, measured conducted Tx power at Plimit, and

measured 1gSAR or 10gSAR values at Plimit corresponding to sub-6 transmission.

 Demonstrate the total RF exposure averaged over FCC defined time windows does not exceed FCC's SAR limits, through time-averaged SAR measurements. Note as mentioned earlier, this measurement is performed for transmission scenario 1 only.

 For sub-6 transmission only, measure instantaneous SAR versus time; for LTE+ sub6 NR transmission, request low power (or all-down bits) on LTE so that measured SAR predominantly corresponds to sub6 NR.

 Convert it into RF exposure and divide by respective FCC limits to obtain normalized exposure versus time.

 Perform time averaging over FCC defined time window.

 Demonstrate that the total normalized time-averaged RF exposure is less than 1 for transmission scenario 1 at all times.

Mathematical expression:

 For sub-6 transmission only:

( )

( )

( )

(3a)



( )

(3b)

where,

( ),

, and

correspond to the measured instantaneous point SAR, measured point

SAR at Plimit, and measured 1gSAR or 10gSAR values at Plimit corresponding to sub-6 transmission.

NOTE: cDASY6 measurement system by Schmid & Partner Engineering AG (SPEAG ) of Zurich,

Switzerland measures relative E-field, and provides ratio of [

[

( )]

] versus time.

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FCC RF Exposure Report
3 SAR Time Averaging Validation Test Procedures

Report No. : FA1N0903A

This chapter provides the test plan and test procedure for validating Qualcomm Smart Transmit feature for sub-6 transmission. The 100 seconds time window for operating f < 3GHz is used as an example to detail the test procedures in this chapter.

3.1 Test sequence determination for validation
Following the FCC recommendation, two test sequences having time-variation in Tx power are predefined for sub-6 (f < 6 GHz) validation:
 Test sequence 1: request EUT's Tx power to be at maximum power, measured Pmax, for 80s, then requesting for half of the maximum power, i.e., measured Pmax/2, for the rest of the time.
 Test sequence 2: request EUT's Tx power to vary with time. This sequence is generated relative to measured Pmax, measured Plimit and calculated Preserve (= measured Plimit in dBm - Reserve_power_margin in dB) of EUT based on measured Plimit.
The details for generating these two test sequences is described and listed in Appendix A.
NOTE: For test sequence generation, "measured Plimit" and "measured Pmax" are used instead of the "Plimit" specified in EFS entry and "Pmax" specified for the device, because Smart Transmit feature operates against the actual power level of the "Plimit" that was calibrated for the EUT. The "measured Plimit" accurately reflects what the feature is referencing to, therefore, it should be used during feature validation testing. The RF tune up and device-to-device variation are already considered in Part 1 report prior to determining Plimit.

3.2 Test configuration selection criteria for validating Smart Transmit feature
For validating Smart Transmit feature, this section provides a general guidance to select test cases. In practice, an adjustment can be made in test case selection. The justification/clarification may be provided.

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3.2.1 Test configuration selection for time-varying Tx power transmission
The Smart Transmit time averaging feature operation is independent of bands, modes, and channels for a given technology. Hence, validation of Smart Transmit in one band/mode/channel per technology is sufficient.
The criteria for the selection are based on the Plimit values determined in Part 1 report. Select the band in each supported technology that corresponds to the Plimit value that is less than Pmax for validating Smart Transmit.
Note this test is designed for single radio transmission scenario. If UE supports sub6 NR in both non-standalone (NSA) and standalone (SA) modes, then validation in timevarying Tx power transmission scenario described in this section needs to be performed in SA mode. Otherwise, it needs to be performed in NSA mode with LTE anchor set to low power. The choice between SA and NSA mode needs to also take into account the seletion criteria described below. In general, one mode out of the two modes (NSA or SA) is sufficient for this test.

3.2.2 Test configuration selection for change in call
The criteria to select a test configuration for call-drop measurement is:
 Select technology/band with least Plimit among all supported technologies/bands, and select the radio configuration (e.g., # of RBs, channel#) in this technology/band that corresponds to the highest measured 1gSAR at Plimit listed in Part 1 report.
 In case of multiple bands having same least Plimit, then select the band having the highest measured 1gSAR at Plimit in Part 1 report.
This test is performed with the EUT's Tx power requested to be at maximum power, the above band selection will result in Tx power enforcement (i.e., EUT forced to have Tx power at Preserve) for longest duration in one FCC defined time window. The call change (call drop/reestablish) is performed during the Tx power enforcement duration (i.e., during the time when EUT is forced to have Tx power at Preserve). One test is sufficient as the feature operation is independent of technology and band.
3.2.3 Test configuration selection for change in technology/band
The selection criteria for this measurement is, for a given antenna, to have EUT switch from a technology/band with lowest Plimit within the technology group (in case of multiple bands having the same Plimit, then select the band with highest measured 1gSAR at Plimit) to a technology/band with highest Plimit within the technology group, in case of multiple bands having the same Plimit, then select the band with lowest measured 1gSAR at Plimit in Part 1 report, or vice versa.
This test is performed with the EUT's Tx power requested to be at maximum power, the technology/band switch is performed during Tx power enforcement duration (i.e., during the time when EUT is forced to have Tx power at Preserve).

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3.2.4 Test configuration selection for change in DSI
The criteria to select a test configuration for DSI change test is
 Select a technology/band having the Plimit < Pmax within any technology and DSI group, and for the same technology/band having a different Plimit in any other DSI group. Note that the selected DSI transition need to be supported by the device.
This test is performed with the EUT's Tx power requested to be at maximum power in selected technology/band, and DSI change is conducted during Tx power enforcement duration (i.e., during the time when EUT is forced to have Tx power at Preserve).

3.2.5 Test configuration selection for SAR exposure switching
If supported, the test configuration for SAR exposure switching should cover
1. SAR exposure switch when two active radios are in the same time window
2. SAR exposure switch when two active radios are in different time windows. One test with two active radios in any two different time windows is sufficient as Smart Transmit operation is the same for RF exposure switch in any combination of two different time windows.
The Smart Transmit time averaging operation is independent of the source of SAR exposure (for example, LTE vs. Sub6 NR) and ensures total time-averaged RF exposure compliance. Hence, validation of Smart Transmit in any one simultaneous SAR transmission scenario (i.e., one combination for LTE + Sub6 NR transmission) is sufficient, where the SAR exposure varies among SARradio1 only, SARradio1 + SARradio2, and SARradio2 only scenarios.
The criteria to select a test configuration for validating Smart Transmit feature during SAR exposure switching scenarios is
 Select any two < 6GHz technologies/bands that the EUT supports simultaneous transmission (for example, LTE+ Sub6 NR).
 Among all supported simultaneous transmission configurations, the selection order is
1. select one configuration where both Plimit of radio1 and radio2 is less than their corresponding Pmax, preferably, with different Plimits. If this configuration is not available, then,
2. select one configuration that has Plimit less than its Pmax for at least one radio. If this can not be found, then,
3. select one configuration that has Plimit of radio1 and radio2 greater than Pmax but with least (Plimit  Pmax) delta.
Test for one simultaneous transmission scenario is sufficient as the feature operation is the same.

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3.2.6 Test configuration selection for change in time window
FCC specifies different time window for time averaging based on operation frequency. The criteria to select a test configuration for validating Smart Transmit feature and demonstrating the compliance during the change in time window is
 Select any technology/band that has operation frequency classified in one time window defined by FCC (such as 100-seconds time window), and its corresponding Plimit is less than Pmax if possible.
 Select the 2nd technology/band that has operation frequency classified in a different time window defined by FCC (such as 60-seconds time window), and its corresponding Plimit is less than Pmax if possible.
 It is preferred both Plimit values of two selected technology/band less than corresponding Pmax, but if not possible, at least one of technologies/bands has its Plimit less than Pmax.
This test is performed with the EUT's Tx power requested to be at maximum power in selected technology/band. Test for one pair of time windows selected is sufficient as the feature operation is the same.

3.3 Test procedures for conducted power measurements
This section provides general conducted power measurement procedures to perform compliance test under dynamic transmission scenarios described in Section 2. In practice, an adjustment can be made in these procedures. The justification/clarification may be provided.

3.3.1 Time-varying Tx power transmission scenario
This test is performed with the two pre-defined test sequences described in Section 3.1 for all the technologies and bands selected in Section 3.2.1. The purpose of the test is to demonstrate the effectiveness of power limiting enforcement and that the time-averaged SAR (corresponding time-averaged Tx power) does not exceed the FCC limit at all times (see Eq. (1a) and (1b)).

Test procedure
1. Measure Pmax, measure Plimit and calculate Preserve (= measured Plimit in dBm  Reserve_power_margin in dB) and follow Section 3.1 to generate the test sequences for all the technologies and bands selected in Section 3.2.1. Both test sequence 1 and test sequence 2 are created based on measured Pmax and measured Plimit of the EUT. Test condition to measure Pmax and Plimit is:
 Measure Pmax with Smart Transmit disabled and callbox set to request maximum power.
 Measure Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.
2. Set Reserve_power_margin to actual (intended) value (3dB for this EUT based on Part 1 report) and reset power on EUT to enable Smart Transmit, establish radio link

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in desired radio configuration, with callbox requesting the EUT's Tx power to be at

pre-defined test sequence 1, measure and record Tx power versus time, and then

convert the conducted Tx power into 1gSAR or 10gSAR value (see Eq. (1a)) using

measured Plimit from above Step 1. Perform running time average to determine timeaveraged power and 1gSAR or 10gSAR versus time as illustrated in Figure 3-1

where using 100-seconds time window as an example.

NOTE: In Eq.(1a), instantaneous Tx power is converted into instantaneous 1gSAR or 10gSAR value by applying the measured worst-case 1gSAR or 10gSAR value at Plimit for the corresponding technology/band/antenna/DSI reported in Part 1 report.

NOTE: For an easier computation of the running time average, 0 dBm can be added at the beginning of the test sequences the length of the responding time window, for example, add 0dBm for 100-seconds so the running time average can be directly performed starting with the first 100-seconds data using excel spreadsheet. This technique applies to all tests performed in this Part 2 report for easier time-averaged computation using excel spreadsheet.

Figure 3-1 100s running average illustration

3. Make one plot containing: a. Instantaneous Tx power versus time measured in Step 2, b. Requested Tx power used in Step 2 (test sequence 1), c. Computed time-averaged power versus time determined in Step 2, d. Time-averaged power limit (corresponding to FCC SAR limit of 1.6 W/kg for 1gSAR or 4.0W/kg for 10gSAR) given by

(

) (5a)

where

and

and measured SAR at Plimit.

4. Make another plot containing:

correspond to measured power at Plimit

a. Computed time-averaged 1gSAR or 10gSAR versus time determined in Step 2

b. FCC 1gSARlimit of 1.6W/kg or FCC 10gSARlimit of 4.0W/kg.

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5. Repeat Steps 2 ~ 4 for pre-defined test sequence 2 and replace the requested Tx power (test sequence 1) in Step 2 with test sequence 2.

6. Repeat Steps 2 ~ 5 for all the selected technologies and bands.

The validation criteria are, at all times, the time-averaged power versus time shown in Step 3 plot shall not exceed the time-averaged power limit (defined in Eq. (5a)), in turn, the time-averaged 1gSAR or 10gSAR versus time shown in Step 4 plot shall not exceed the FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR (i.e., Eq. (1b)).

3.3.2 Change in call scenario
This test is to demonstrate that Smart Transmit feature accurately accounts for the past Tx powers during time-averaging when a new call is established.
The call disconnect and re-establishment needs to be performed during power limit enforcement, i.e., when the EUT's Tx power is at Preserve level, to demonstrate the continuity of RF exposure management and limiting in call change scenario. In other words, the RF exposure averaged over any FCC defined time window (including the time windows containing the call change) doesn't exceed FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.
Test procedure
1. Measure Plimit for the technology/band selected in Section 3.2.2. Measure Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.
2. Set Reserve_power_margin to actual (intended) value and reset power on EUT to enable Smart Transmit.
3. Establish radio link with callbox in the selected technology/band.
4. Request EUT's Tx power at 0 dBm for at least one time window specified for the selected technology/band, followed by requesting EUT's Tx power to be at maximum power for about ~60 seconds, and then drop the call for ~10 seconds. Afterwards, reestablish another call in the same radio configuration (i.e., same technology/band/channel) and continue callbox requesting EUT's Tx power to be at maximum power for the remaining time of at least another full duration of the specified time window. Measure and record Tx power versus time. Once the measurement is done, extract instantaneous Tx power versus time, convert the measured conducted Tx power into 1gSAR or 10gSAR value using Eq. (1a), and then perform the running time average to determine time-averaged power and 1gSAR or 10gSAR versus time.
NOTE: In Eq.(1a), instantaneous Tx power is converted into instantaneous 1gSAR or 10gSAR value by applying the measured worst-case 1gSAR or 10gSAR value at Plimit for the corresponding technology/band/antenna/DSI reported in Part 1 report.

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5. Make one plot containing: (a) instantaneous Tx power versus time, (b) requested

power, (c) computed time-averaged power, (d) time-averaged power limit calculated

using Eq.(5a).

6. Make another plot containing: (a) computed time-averaged 1gSAR or 10gSAR versus time, and (b) FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.

The validation criteria are, at all times, the time-averaged power versus time shall not exceed the time-averaged power limit (defined in Eq.(5a)), in turn, the time-averaged 1gSAR or 10gSAR versus time shall not exceed the FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR (i.e., Eq. (1b)).

3.3.3 Change in technology and band

This test is to demonstrate the correct power control by Smart Transmit during technology switches and/or band handovers.

Similar to the change in call test in Section 3.3.2, to validate the continuity of RF exposure limiting during the transition, the technology and band handover needs to be performed when EUT's Tx power is at Preserve level (i.e., during Tx power enforcement) to make sure that the EUT's Tx power from previous Preserve level to the new Preserve level (corresponding to new technology/band). Since the Plimit could vary with technology and band, Eq. (1a) can be written as follows to convert the instantaneous Tx power in 1gSAR or 10gSAR exposure for the two given radios, respectively:

( )

( )

(6a)

( )

( )

(6b)

[

( )



() ]

(6c)

where, conducted_Tx_power_1(t), conducted_Tx_power_Plimit_1, and 1g_or_10gSAR_Plimit_1 correspond to the measured instantaneous conducted Tx power, measured conducted Tx power at Plimit, and measured 1gSAR or 10gSAR value at Plimit of technology1/band1; conducted_Tx_power_2(t), conducted_Tx_power_Plimit_2(t), and 1g_or_10gSAR_Plimit_2 correspond to the measured instantaneous conducted Tx power, measured conducted Tx power at Plimit, and measured 1gSAR or 10gSAR value at Plimit of technology2/band2. Transition from technology1/band1 to the technology2/band2
happens at time-instant `t1'.

Test procedure
1. Measure Plimit for both the technologies and bands selected in Section 3.2.3. Measure Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.
2. Set Reserve_power_margin to actual (intended) value and reset power on EUT to enable Smart Transmit
3. Establish radio link with callbox in first technology/band selected.
4. Request EUT's Tx power at 0 dBm for at least one time window specified for the selected technology/band, followed by requesting EUT's Tx power to be at maximum

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power for about ~60 seconds, and then switch to second technology/band selected.

Continue with callbox requesting EUT's Tx power to be at maximum power for the

remaining time of at least another full duration of the specified time window. Measure

and record Tx power versus time for the full duration of the test.

5. Once the measurement is done, extract instantaneous Tx power versus time, and convert the conducted Tx power into 1gSAR or 10gSAR value using Eq. (6a) and (6b) and corresponding measured Plimit values from Step 1 of this section. Perform the running time average to determine time-averaged power and 1gSAR or 10gSAR versus time.

NOTE: In Eq.(6a) & (6b), instantaneous Tx power is converted into instantaneous 1gSAR or 10gSAR value by applying the measured worst-case 1gSAR or 10gSAR value at Plimit for the corresponding technology/band/antenna/DSI reported in Part 1 report.

6. Make one plot containing: (a) instantaneous Tx power versus time, (b) requested power, (c) computed time-averaged power, (d) time-averaged power limit calculated using Eq.(5a).
7. Make another plot containing: (a) computed time-averaged 1gSAR or 10gSAR versus time, and (b) FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.
The validation criteria are, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed the FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR (i.e., Eq. (6c)).

3.3.4 Change in antenna
This test is to demonstrate the correct power control by Smart Transmit during antenna switches from one antenna to another. The test procedure is identical to Section 3.3.3, by replacing technology/band switch operation with antenna switch. The validation criteria are, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.
NOTE: If the EUT does not support antenna switch within the same technology/band, but has multiple antennas to support different frequency bands, then the antenna switch test is included as part of change in technology and band (Section 3.3.3) test.

3.3.5 Change in DSI
This test is to demonstrate the correct power control by Smart Transmit during DSI switches from one DSI to another. The test procedure is identical to Section 3.3.3, by replacing technology/band switch operation with DSI switch. The validation criteria are, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.
.

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Report No. : FA1N0903A

3.3.6 Change in time window

This test is to demonstrate the correct power control by Smart Transmit during the change in averaging time window when a specific band handover occurs. FCC specifies time-averaging windows of 100s for Tx frequency < 3GHz, and 60s for Tx frequency between 3GHz and 6GHz.

To validate the continuity of RF exposure limiting during the transition, the band handover test needs to be performed when EUT handovers from operation band less than 3GHz to greater than 3GHz and vice versa. The equations (3a) and (3b) in Section 2 can be written as follows for transmission scenario having change in time window,

( )

( )

(7a)

( )

( )

(7b)

[

() ]

[

() ]

(7c)

where, conducted_Tx_power_1(t), conducted_Tx_power_Plimit_1(t), and 1g_ or 10g_SAR_Plimit_1 correspond to the instantaneous Tx power, conducted Tx power at Plimit, and compliance 1g_ or 10g_SAR values at Plimit_1 of band1 with time-averaging window `T1SAR'; conducted_Tx_power_2(t), conducted_Tx_power_Plimit_2(t), and 1g_ or 10g_SAR_Plimit_2 correspond to the instantaneous Tx power, conducted Tx power at Plimit, and compliance 1g_ or 10g_SAR values at Plimit_2 of band2 with time-averaging window `T2SAR'. One of the two bands is less than 3GHz, another is greater than 3GHz. Transition from first band with time-averaging window `T1SAR' to the second band with time-averaging window `T2SAR' happens at time-instant `t1'.

Test procedure
1. Measure Plimit for both the technologies and bands selected in Section 3.2.6. Measure Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.
2. Set Reserve_power_margin to actual (intended) value and enable Smart Transmit
Transition from 100s time window to 60s time window, and vice versa
1. Establish radio link with callbox in the technology/band having 100s time window selected in Section 3.2.6.
2. Request EUT's Tx power to be at 0 dBm for at least 100 seconds, followed by requesting EUT's Tx power to be at maximum power for about ~140 seconds, and then switch to second technology/band (having 60s time window) selected in Section 3.2.6. Continue with callbox requesting EUT's Tx power to be at maximum power for about ~60s in this second technology/band, and then switch back to the first technology/band. Continue with callbox requesting EUT's Tx power to be at maximum power for at least another 100s. Measure and record Tx power versus time for the entire duration of the test.
3. Once the measurement is done, extract instantaneous Tx power versus time, and convert the conducted Tx power into 1gSAR or 10gSAR value (see Eq. (7a) and (7b))

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using corresponding technology/band Step 1 result, and then perform 100s running

average to determine time-averaged 1gSAR or 10gSAR versus time. Note that in

Eq.(7a) & (7b), instantaneous Tx power is converted into instantaneous 1gSAR or

10gSAR value by applying the worst-case 1gSAR or 10gSAR value tested in Part 1

for the selected technologies/bands at Plimit.

4. Make one plot containing: (a) instantaneous Tx power versus time measured in Step 4.

5. Make another plot containing: (a) instantaneous 1gSAR versus time determined in Step 5, (b) computed time-averaged 1gSAR versus time determined in Step 5, and (c) corresponding regulatory 1gSARlimit of 1.6W/kg or 10gSARlimit of 4.0W/kg.
Transition from 60s time window to 100s time window, and vice versa

1. Establish radio link with callbox in the technology/band having 60s time window selected in Section 3.2.6.

2. Request EUT's Tx power to be at 0 dBm for at least 60 seconds, followed by requesting EUT's Tx power to be at maximum power for about ~80 seconds, and then switch to second technology/band (having 100s time window) selected in Section 3.2.6. Continue with callbox requesting EUT's Tx power to be at maximum power for about ~100s in this second technology/band, and then switch back to the first technology/band. Continue with callbox requesting EUT's Tx power to be at maximum power for the remaining time for a total test time of 500 seconds. Measure and record Tx power versus time for the entire duration of the test.

3. Repeat above Step 5~7 to generate the plots The validation criteria is, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed the regulatory 1gSARlimit of 1.6W/kg or 10gSARlimit of 4.0W/kg

3.3.7 SAR exposure switching
This test is to demonstrate that Smart Transmit feature is accurately accounts for switching in exposures among SAR from radio1 only, SAR from both radio1 and radio2, and SAR from radio2 only scenarios, and ensures total time-averaged RF exposure complies with the FCC limit. Here, radio1 represents primary radio (for example, LTE anchor in a NR non-standalone mode call) and radio2 represents secondary radio (for example, sub6 NR). The detailed test procedure for SAR exposure switching in the case of LTE+ sub6 NR non-standalone mode transmission scenario is provided in Appendix B.2.
Test procedure:
1. Measure conducted Tx power corresponding to Plimit for radio1 and radio2 in selected band. Test condition to measure conducted Plimit is:
 Establish device in call with the callbox for radio1 technology/band. Measure conducted Tx power corresponding to radio1 Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.

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 Repeat above step to measure conducted Tx power corresponding to radio2 Plimit. If radio2 is dependent on radio1 (for example, non-standalone mode of sub6 NR requiring radio1 LTE as anchor), then establish radio1 + radio2 call with callbox, and request all down bits for radio1 LTE. In this scenario, with callbox requesting maximum power from radio2 sub6 NR, measured conducted Tx power corresponds to radio2 Plimit (as radio1 LTE is at all-down bits)
2. Set Reserve_power_margin to actual (intended) value, with EUT setup for radio1 + radio2 call. In this description, it is assumed that radio2 has lower priority than radio1. Establish device in radio1+radio2 call, and request all-down bits or low power on radio1, with callbox requesting EUT's Tx power to be at maximum power in radio2 for at least one time window. After one time window, set callbox to request EUT's Tx power to be at maximum power on radio1, i.e., all-up bits. Continue radio1+radio2 call with both radios at maximum power for at least one time window, and drop (or request all-down bits on) radio2. Continue radio1 at maximum power for at least one time window. Record the conducted Tx power for both radio1 and radio2 for the entire duration of this test.

3. Once the measurement is done, extract instantaneous Tx power versus time for both radio1 and radio2 links. Convert the conducted Tx power for both these radios into 1gSAR or 10gSAR value (see Eq. (6a) and (6b)) using corresponding technology/band Plimit measured in Step 1, and then perform the running time average to determine time-averaged 1gSAR or 10gSAR versus time.

4. Make one plot containing: (a) instantaneous Tx power versus time measured in Step 2.

5. Make another plot containing: (a) instantaneous 1gSAR versus time determined in Step 3, (b) computed time-averaged 1gSAR versus time determined in Step 3, and (c) corresponding regulatory 1gSARlimit of 1.6W/kg or 10gSARlimit of 4.0W/kg.
The validation criteria is, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed the regulatory 1gSARlimit of 1.6W/kg or 10gSARlimit of 4.0W/kg.

3.3.8 Change in WIFI/BT Back off
The purpose of the test is to demonstrate that Smart Transmit applies back off for the selected sub6 band when WiFi is transmitting. The actual procedure to enable WiFi/BT Transmit should be requested directly from the DUT manufacturer. The validation criteria are, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.

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Report No. : FA1N0903A

3.4 Test procedure for time-varying SAR measurements

This section provides general time-varying SAR measurement procedures to perform compliance test under dynamic transmission scenarios described in Section 2. In practice, an adjustment can be made in these procedures. The justification/clarification may be provided.

To perform the validation through SAR measurement for transmission scenario 1 described in Section 2, the "path loss" between callbox antenna and EUT needs to be calibrated to ensure that the EUT Tx power reacts to the requested power from callbox in a radiated call. It should be noted that when signaling in closed loop mode, protocollevel power control is in play, resulting in EUT not solely following callbox TPC (Tx power control) commands. In other words, EUT response has many dependencies (RSSI, quality of signal, path loss variation, fading, etc.,) other than just TPC commands. These dependencies have less impact in conducted setup (as it is a controlled environment and the path loss can be very well calibrated) but have significant impact on radiated testing in an uncontrolled environment, such as SAR test setup. Therefore, the deviation in EUT Tx power from callbox requested power is expected, however the time-averaged SAR should not exceed FCC SAR requirement at all times as Smart Transmit controls Tx power at EUT.
The following steps are for time averaging feature validation through SAR measurement:

1. "Path Loss" calibration: Place the EUT against the phantom in the worst-case position determined based on Section 3.2.1. For each band selected, prior to SAR measurement, perform "path loss" calibration between callbox antenna and EUT. Since the SAR test environment is not controlled and well calibrated for OTA (Over the Air) test, extreme care needs to be taken to avoid the influence from reflections. The test setup is described in Section 6.1.

2. Time averaging feature validation:
i For a given radio configuration (technology/band) selected in Section 3.2.1, enable Smart Transmit and set Reserve_power_margin to 0 dB, with callbox to request maximum power, perform area scan, conduct pointSAR measurement at peak location of the area scan. This point SAR value, pointSAR_Plimit, corresponds to point SAR at the measured Plimit (i.e., measured Plimit from the EUT in Step 1 of Section 3.3.1).
ii Set Reserve_power_margin to actual (intended) value and reset power on EUT to enable Smart Transmit. Note, if Reserve_power_margin cannot be set wirelessly, care must be taken to re-position the EUT in the exact same position relative to the SAM phantom as in above Step 2.i. Establish radio link in desired radio configuration, with callbox requesting the EUT's Tx power at power levels described by test sequence 1 generated in Step 1 of Section 3.3.1, conduct point SAR measurement versus time at peak location of the area scan determined in Step 2.i of this section. Once the measurement is done, extract instantaneous point SAR vs time data, pointSAR(t), and convert it into instantaneous 1gSAR or 10gSAR vs. time using Eq. (3a), re-written below:

( )

( )

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Report No. : FA1N0903A

where, pointSAR_Plimit is the value determined in Step 2.i, and pointSAR(t) is the

instantaneous point SAR measured in Step 2.ii,

is the

measured 1gSAR or 10gSAR value listed in Part 1 report.

iii Perform 100s running average to determine time-averaged 1gSAR or 10gSAR versus time.

iv Make one plot containing: (a) time-averaged 1gSAR or 10gSAR versus time determined in Step 2.iii of this section, (b) FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.

v Repeat 2.ii ~ 2.iv for test sequence 2 generated in Step 1 of Section 3.3.1.

vi Repeat 2.i ~ 2.v for all the technologies and bands selected in Section 3.2.1.

The time-averaging validation criteria for SAR measurement is that, at all times, the time-averaged 1gSAR or 10gSAR versus time shall not exceed FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR (i.e., Eq. (3b)).

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FCC RF Exposure Report
4 Test Configurations

Report No. : FA1N0903A

4.1 WWAN (sub-6) transmission
The Plimit values, corresponding to SAR_design_target, for technologies and bands supported by EUT are derived in Part 1 report and summarized in Table 4-1. Note all Plimit power levels entered in Table 4-1 correspond to average power levels after accounting for duty cycle in the case of TDD modulation schemes (for e.g., GSM, LTE TDD & 5G NR TDD).
For EFS version 16 (or higher), secondary radio (5G NR FR1) can get up to 100% reserve factor irrespective of reserve_power_margin setting. So, in the below analysis, replace 75% with 100% reserve factor in case of EFS version 16 (or higher).

Table 4-1: Plimit for supported technologies and bands (Plimit in EFS file)

Band

Antenna

Head

DSI 2

DSI 2_ Sim TX

Body Worn

DSI 3

DSI 3_ Sim TX

Hotspot
DSI 3_ Sim TX

Extremity

Sensor Off

DSI 6

DSI 6_ Sim TX

DSI4

LTE Band 71

Ant 2

25.2

21.5

27.4

24.3

24.3

23.0 23.0

23.0

LTE Band 12 / 17

Ant 2

22.5

21.0

26.1

22.0

22.0

23.0 23.0

23.0

LTE Band 13

Ant 2

22.0

20.5

26.1

21.5

21.5

23.0 23.0

23.0

LTE Band 14

Ant 2

22.0

20.5

25.8

22.5

22.5

23.0 23.0

23.0

LTE Band 26 / 5

Ant 2

22.5

21.0

24.5

21.5

21.5

23.0 23.0

23.0

LTE Band 66 / 4

Ant 2

22.0

20.0

22.0

19.0

19.0

22.0 19.0

23.0

LTE Band 25 / 2

Ant 2

21.0

19.0

21.5

18.5

18.5

22.5 19.5

23.0

LTE Band 30

Ant 8

17.0

15.5

18.0

12.5

12.5

19.5 16.5

23.0

LTE Band 41_PC3 LTE Band 41_PC2

Ant 8

21.0

17.9

16.4

16.9

12.9

12.9

19.9 16.9

Ant 8

22.4

LTE Band 48

Ant 4

20.0

18.5

17.0

13.5

13.5

18.0 15.0

21.0

FR1 N71

Ant 2

26.7

25.0

30.4

25.4

25.4

23.0 23.0

23.0

FR1 N12

Ant 2

25.6

24.0

29.1

25.9

25.9

23.0 23.0

23.0

FR1 N14

Ant 2

25.7

24.1

27.9

24.7

24.7

23.0 23.0

23.0

FR1 N26 / N5

Ant 2

25.0

22.0

27.2

24.1

24.1

23.0 23.0

23.0

FR1 N70

Ant 2

29.9

28.3

31.3

27.0

27.0

23.0 23.0

23.0

FR1 N66

Ant 2

24.3

21.5

25.6

21.0

21.0

23.0 23.0

23.0

FR1 N25 / N2

Ant 2

21.5

20.0

21.5

18.0

18.0

22.0 18.5

23.0

FR1 N30

Ant 8

18.0

16.5

18.0

14.0

14.0

20.5 17.5

23.0

FR1 N41_PC3

Ant 8

18.5

17.0

19.0

13.5

13.5

21.5 18.5

23.0

FR1 N41_PC2

Ant 8

18.5

17.0

19.0

13.5

13.5

21.5 18.5

26.0

FR1 N41(SRS)

Ant 6

32.5

30.9

19.0

16.0

16.0

19.0 19.0

19.0

FR1 N41(SRS)

Ant 9

28.2

26.6

15.5

13.0

13.0

19.0 19.0

19.0

FR1 N77 PC3/N78

Ant 4

21.5

20.0

12.0

9.0

9.0

16.5 13.5

23.0

FR1 N77 PC2

Ant 4

21.5

20.0

12.0

9.0

9.0

16.5 13.5

26.0

FR1 N77 / N78(SRS)

Ant 5

29.8

28.1

20.8

16.5

16.5

19.5 19.5

19.5

FR1 N77 / N78(SRS)

Ant 6

33.2

31.6

11.0

8.0

8.0

17.0 17.0

17.0

FR1 N77 / N78(SRS)

Ant 10

37.0

35.3

19.6

15.0

15.0

17.0 17.0

17.0

GSM850(4 Tx slots)

Ant 1

32.4

32.4

24.0

24.0

24.0

29.4 29.4

26.0

GSM1900(3 Tx slots)

Ant 1

35.0

35.0

17.7

16.2

16.2

20.7 20.7

22.7

WCDMA V

Ant 1

30.6

30.6

22.0

22.0

22.0

26.1 26.1

23.0

WCDMA IV

Ant 1

32.1

32.1

18.5

16.5

16.5

21.5 21.5

23.0

WCDMA II

Ant 1

33.5

33.5

16.5

15.5

15.5

20.5 20.5

23.0

LTE Band 71

Ant 1

32.3

32.3

25.0

25.0

25.0

23.0 23.0

23.0

LTE Band 12 / 17

Ant 1

31.0

31.0

24.6

24.6

24.6

23.0 23.0

23.0

LTE Band 13

Ant 1

31.4

31.4

25.4

25.4

25.4

23.0 23.0

23.0

Pmax*
23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 21.0 22.4 21.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 26.0 19.0 19.0 23.0 26.0 19.5 17.0 17.0 26.0 22.7 23.0 23.0 23.0 23.0 23.0 23.0

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Report No. : FA1N0903A

LTE Band 14

Ant 1

31.4

31.4

24.3

24.3

24.3

23.0 23.0

23.0

23.0

LTE Band 26 / 5

Ant 1

30.4

30.4

22.0

22.0

22.0

24.5 24.5

23.0

23.0

LTE Band 66 / 4

Ant 1

32.1

32.1

18.0

16.5

16.5

21.5 21.5

23.0

23.0

LTE Band 25 / 2

Ant 1

31.6

31.6

16.5

15.5

15.5

20.0 20.0

23.0

23.0

LTE Band 30

Ant 7

33.5

33.5

22.0

21.0

21.0

23.0 23.0

23.0

23.0

LTE Band 7

Ant 7

30.4

30.4

21.5

21.5

21.5

22.5 22.5

23.0

23.0

LTE Band 41_PC3 / 38

Ant 7

21.0

21.0

29.4

29.4

18.9

17.9

17.9

21.4 21.4

LTE Band 41_PC2

Ant 7

22.4

22.4

FR1 N71

Ant 1

35.2

35.2

28.5

28.5

28.5

23.0 23.0

23.0

23.0

FR1 N5

Ant 1

33.2

33.2

26.0

26.0

26.0

23.0 23.0

23.0

23.0

FR1 N70

Ant 1

34.7

34.7

18.0

17.0

17.0

22.0 22.0

23.0

23.0

FR1 N66

Ant 1

33.1

33.1

17.0

15.5

15.5

20.5 20.5

23.0

23.0

FR1 N25 / N2

Ant 1

35.3

35.3

17.0

16.0

16.0

21.0 21.0

23.0

23.0

FR1 N30

Ant 7

32.6

32.6

21.0

21.0

21.0

22.5 22.5

23.0

23.0

FR1 N41_PC3

Ant 7

31.1

31.1

20.0

20.0

20.0

22.0 22.0

23.0

23.0

FR1 N41_PC2

Ant 7

31.1

31.1

20.0

20.0

20.0

22.0 22.0

26.0

26.0

Note:

1. *Pmax is used for RF tune up procedure. The maximum allowed output power is equal to Pmax +1 dB device uncertainty. 2. All Plimit power levels entered in the Table correspond to average power levels after accounting for duty cycle in the case TDD
modulation schemes (for e.g., GSM & LTE TDD). 3. The following table is duty cycle and factor used for calculating time average power. 4. 5G NR n41 Ant 3/Ant 9, and n77/78 Ant 5/ Ant 6/ Ant 10 support SRS (Sounding Reference Signal) functionality.

GSM/FDD/TDD GSM 1TX GSM 2TX GSM 3TX GSM 4TX FDD LTE TDD LTE TDD HPUE NR FDD/TDD

Duty Cycle 12.50% 25% 37.50% 50% 100% 63.30% 43.30% 100%

Time average calculation factor(dB) -9.0 -6.0 -4.3 -3.0 0.0 -2.0 -3.6 0.0

Antenna
UAT Antenna LAT Antenna

ANT2 & ANT4 & ANT5 & ANT6 & ANT8 & ANT9 & ANT10 ANT1 & ANT7

5GNR FR1 SA/NSA mode

Antenna configuration ANT1 ANT2 ANT4 ANT7 ANT8

5G FR1 SA mode n2/n5/ n25/ n66/n70/n71 n2/n5/n12/n14/n25/n26/ n66/n70/n71 n77/n78 n30/n41 n30/n41

5G FR1 NSA mode n2/n5/ n25/ n66 /n71 n2/n5/n12/n25 /n66/n71 n77/n78 n30/n41 n30/n41

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Report No. : FA1N0903A

LTE Inter-band Uplink CA combination

LTE Uplink CA

2CC Uplink Carrier Aggregation

Combination

Band&Ant No.

Band&Ant No.

CA_2A-4A

LTE B2: ANT1/2

LTE B4: ANT2/1

CA_2A-5A

LTE B2: ANT1/2

LTE B5: ANT2/1

CA_2A-12A

LTE B2: ANT1/2

LTE B12: ANT2/1

CA_2A-13A

LTE B2: ANT1/2

LTE B13: ANT2/1

CA_2A-66A

LTE B2: ANT1/2

LTE B66: ANT2/1

CA_4A-5A

LTE B4: ANT1/2

LTE B5: ANT2/1

CA_4A-12A

LTE B4: ANT1/2

LTE B12: ANT2/1

CA_4A-13A

LTE B4: ANT1/2

LTE B13: ANT2/1

CA_5A-66A

LTE B5: ANT2/1

LTE B66: ANT1/2

CA_12A-66A

LTE B12: ANT2/1

LTE B66: ANT1/2

CA_13A-66A

LTE B13: ANT2/1

LTE B66: ANT1/2

*Pmax is used for RF tune up procedure. The maximum allowed output power is equal to Pmax + device uncertainty.
Maximum target power, Pmax, is configured in NV settings in EUT to "limit maximum transmitting power". This power is converted into "peak power in NV settings for TDD schemes". The EUT maximum allowed output power is equal to Pmax + 1.0dB device uncertainty. EFS file Plimit level will compare to Pmax, when Plimit is high than Pmax, the power will be limited to Pmax power level.
**All Plimit power levels entered in the Table correspond to average power levels after accounting for duty cycle in the case TDD modulation schemes (for e.g., GSM & LTE TDD & NR TDD).
Based on selection criteria described in Section 3.2.1, the selected technologies/bands for testing time-varying test sequences are listed in Table 4-1, the Reserve_power_margin (dB) for IHDT56AA4 is set to 3dB in EFS, and is used in Part 2 test.
The radio configurations used in Part 2 test for selected technologies, bands, DSIs and antennas are listed in Table 4-2. The corresponding worst-case radio configuration 1gSAR or 10gSAR values for selected technology/band/DSI are extracted from Part 1 report and are listed in the last column of Table 4-1.
Based on equations (1a) and (3a), it is clear that Part 2 testing outcome is normalized quantity, which implies that it can be applied to any radio configuration within a selected technology/band/DSI. Thus, as long as applying the worst-case SAR obtained from the worst radio configuration in Part 1 testing to calculate time-varying SAR exposure in equations (1a) and (3a), the accuracy in compliance demonstration remains the same.

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FCC RF Exposure Report Table 4-2: Radio configurations selected for Part 2 test

Report No. : FA1N0903A

Test case Test scenario
#

Tech Band Ant

1

GSM 850 1

2

GSM 1900 1

3

WCDMA 2 1

4

WCDMA 4 1

Time-Varying

5

LTE 7 7

6

LTE 25 1

7

5G NR n25 2

8

5G NR n77 4

9

Call Drop

LTE 25 1

10 WIFI/BT back off LTE 25 1

LTE 25 1 11 Tech/band switch
WCDMA 4 1

12 DSI Switch

LTE 25 1 LTE 25 1

LTE 7 7 13 100s-60s-100s
LTE 48 4

LTE 48 4 14 60s-100s-60s
LTE 7 7

15

EN-DC

LTE 66

SAR vs SAR 5G NR n77

1 4

DSI Channel Freq (MHz) BW RB size RB offset

mode

position

Part 1, Position [email protected] details 1g or 10g
SAR (W/kg)

3 251 848.8 -

-

- GPRS(4 Tx slots) Back

5mm

0.868

3 810 1909.8 -

-

- GPRS(3 Tx slots) Back

5mm

1.090

3 9538 1907.6 -

-

-

RMC 12.2Kbps

Back

5mm

0.928

6 1312 1712.4 -

-

-

RMC 12.2Kbps

Back

0mm

2.580

3 21100 2535 20 1

0

QPSK

Back

5mm

0.998

3 26590 1905 20 1

0

QPSK

Back

5mm

0.797

3 376500 1882.5 20 108 54

DFT-15,BPSK

Back

5mm

1.050

3 656000 3840 100 135 69

DFT-30,BPSK

Back

5mm

1.040

3 26590 1905 20 1

0

QPSK

Back

5mm

0.797

3 26590 1905 20 1

0

QPSK

Back

5mm

0.797

3 26590 1905 20 1

0

QPSK

Back

5mm

0.797

3 1312 1712.4 -

-

-

RMC 12.2Kbps

Back

5mm

0.914

3 26590 1905 20 1

0

QPSK

Back

5mm

0.797

6 26140 1860 20 1

0

QPSK

Bottom side 0mm

2.100

3 21100 2535 20 1

0

QPSK

Back

5mm

0.998

3 56640 3690 20 1

99

QPSK

Back

5mm

1.070

3 56640 3690 20 1

99

QPSK

Back

5mm

1.070

3 21100 2535 20 1

0

QPSK

Back

5mm

0.998

3 132572 1770 20 1

0

QPSK

Back

5mm

0.957

3 656000 3840 100 135 69

DFT-30,BPSK

Back

5mm

1.040

Note that the EUT has a several DSI states to manage power for different RF exposure conditions, detail DSI states and trigger conditions shown on the following table, the maximum 1gSAR/or 10gSAR among all exposure scenarios is used in Smart Transmit feature for time averaging operation.

.

Page 24

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Trigger Conditions
Exposure conditions Body Worn(2G/3G/4G/NR) Body Worn (WLAN On)(2G/3G/4G/NR) Body Worn(2G/3G/4G/NR) Body Worn (WLAN On)(2G/3G/4G/NR) Extremity(2G/3G/4G/NR) Extremity (WLAN On)(2G/3G/4G/NR) Extremity(2G/3G/4G/NR) Extremity (WLAN On)(2G/3G/4G/NR)
Hotspot(2G/3G/4G/NR) Hotspot(2G/3G/4G/NR)
Head(2G/3G/4G/NR) Head(WLAN On)(2G/3G/4G/NR)
Head(2G/3G/4G/NR) Head(WLAN On)(2G/3G/4G/NR)

Trigger Conditions sensor on sensor on sensor on sensor on sensor on sensor on sensor on sensor on Hotspot On Hotspot On Receiver on
Receiver on with Wifi Receiver on
Receiver on with Wifi

Report No. : FA1N0903A

DSI

Antenna

3

UAT

3

UAT

3

LAT

3

LAT

6

UAT

6

UAT

6

LAT

6

LAT

3

UAT

3

LAT

2

UAT

2

UAT

2

LAT

2

LAT

SAR design Target

FCC

Measure Distance

Trigger Conditions

DSI

SAR design target

Head

touch&tilt 15deg

Receiver on DSI2 1g SAR design target

Hotspot

5 mm

Sensor On DSI3 1g SAR design target

Body Worn

5 mm

Sensor On DSI3 1g SAR design target

Body Worn / Sensor Off Sensor Trigger Distance -1mm Sensor Off DSI4 1g SAR design target

Extremity

0 mm

Sensor On DSI6 10g SAR design target

Extremity / Sensor Off Sensor Trigger Distance -1mm Sensor Off DSI4 10g SAR design target

Standalone SAR (W/kg)

Simultaneous SAR (W/kg)

WWAN

WLAN+ WWAN WLAN+WWAN 2/3/4/5G BOT 2/3/4/5G TOP

2/3/4/5G-Bot 4/5G-Top 2/3/4/5G-Bot

4/5G-Top

1.01

1.01

1.01

0.70

1.01

0.49

1.01

0.49

1.01

1.01

1.01

0.49

1.01

1.01

1.01

0.49

2.52

2.52

2.52

1.26

2.52

2.52

2.52

1.26

.

Page 25

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

Based on the selection criteria described in Section 3.2, the radio configurations for the Tx varying transmission test cases listed in Section 2 are:
1. Technologies and bands for time-varying Tx power transmission: The test case 1~8 listed in Table 4-2 are selected to test with the test sequences defined in Section 3.1 in both time-varying conducted power measurement and time-varying SAR measurement.
2. Technology and band for change in call test: The test case 9 listed in Table 4-2 are selected for performing the call drop test in conducted power setup. LTE Band 25 having the lowest Plimit among all technologies and bands
3. Change in WIFI/Bluetooth Back off : The test case 10 listed in Table 4-2 is selected for DSI switch test by establishing a call in LTE Band 25 in DSI=3, with WIFI/Bluetooth Back off exposure scenario in conducted power setup.
4. Technologies and bands for change in technology/band test: The test case 11 listed in Table 4-2 is selected for handover test from a technology/band to another technology/band, in conducted power setup.
5. Technologies and bands for change in DSI: The test case 12 listed in Table 4-2 is selected for DSI switch test by establishing a call in LTE Band 25 in DSI=3, and then handing over to DSI = 6 exposure scenario in conducted power setup.
6. Technologies and bands for change in time-window/antenna: The test case 13~14 listed in Table 4-2 is selected for time window switch between 60s window (LTE Band 48) and 100s window (LTE Band 7) in conducted power setup. LTE Band 48 is using different antenna from LTE Band 7, so this test also address the antenna change.
7. Technologies and bands for switch in SAR exposure: The test case 15 listed in Table 4-2 are selected for SAR exposure switching test in one of the supported simultaneous WWAN transmission scenario, i.e., LTE + 5G NR active in the same 100s time window, in conducted power setup.

.

Page 26

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

5 Conducted Power Test Results for Sub-6 Smart Transmit Feature

Validation

5.1 Measurement setup
The Rohde & Schwarz CMW500 callbox is used in this test. The test setup schematic are shown in Figures 5-1. For single antenna measurement, one port (RF1 COM) of the callbox is connected to the RF port of the EUT using a directional coupler. For antenna & technology switch measurement, two ports (RF1 COM and RF3 COM) of the callbox used for signaling two different technologies are connected to a combiner, which is in turn connected to a directional coupler. The other end of the directional coupler is connected to a splitter to connect to two RF ports of the EUT corresponding to the two antennas of interest. In both the setups, power meter is used to tap the directional coupler for measuring the conducted output power of the EUT. For time averaging validation test (Section 3.3.1), call drop test (Section 3.3.2), and DSI switch test (Section 3.3.4), only RF1 COM port of the callbox is used to communicate with the EUT. For technology/band switch measurement (Section. 3.3.3), both RF1 COM and RF3 COM port of callbox are used to switch from one technology communicating on RF1 COM port to another technology communicating on RF3 COM port. All the path losses from RF port of EUT to the callbox RF COM port and to the power meter are calibrated and automatically entered as offsets in the callbox and the power meter via test scripts on the PC used to control callbox and power meter.

Sub6 NR test setup: The Keysight UXM E7515B callbox is used in this test. The test setup schematic are shown in Figures 5-1. For single antenna measurement, one port (RF1 COM) of the callbox is connected to the RF port of the EUT using a directional coupler.

LTE+5G NR test setup: The Keysight UXM E7515B callbox is used in this test. If LTE conducted port and 5G NR conducted port are same on this EUT (i.e., they share the same antenna), therefore, low-/high-pass filter are used to separate LTE and 5G NR signals for power meter measurement via directional couplers, as shown in below Figure 5-1 C (Appendix F  Test Setup Photo ). All the path losses from RF port of DUT to the callbox RF COM port and to the power meter are calibrated and automatically entered as offsets in the callbox and the power meter via test scripts on the PC used to control callbox and power meter.

.

Page 27

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

(a)

(b)

(c)
Figure 5-1 Conducted power measurement setup
Both the callbox and power meter are connected to the PC using GPIB cables. Two test scripts are custom made for automation, and the test duration set in the test scripts is 500 seconds.

.

Page 28

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

For time-varying Tx power measurement, the PC runs the 1st test script to send GPIB commands to control the callbox's requested power versus time, while at the same time to record the conducted power measured at EUT RF port using the power meter. The commands sent to the callbox to request power are:

 0dBm for 100 seconds

 test sequence 1 or test sequence 2 (defined in Section 3.1 and generated in Section 3.2.1), for 360 seconds

 stay at the last power level of test sequence 1 or test sequence 2 for the remaining time.

Power meter readings are periodically recorded every 100ms. A running average of this measured Tx power over 100 seconds is performed in the post-data processing to determine the 100s-time averaged power.

For call drop, technology/band/antenna switch, and DSI switch tests, after the call is established, the callbox is set to request the EUT's Tx power at 0dBm for 100 seconds while simultaneously starting the 2nd test script runs at the same time to start recording the Tx power measured at EUT RF port using the power meter. After the initial 100 seconds since starting the Tx power recording, the callbox is set to request maximum power from the EUT for the rest of the test. Note that the call drop/re-establish, or technology/band/antenna switch or DSI switch is manually performed when the Tx power of EUT is at Preserve level. See Section 3.3 for detailed test procedure of call drop test, technology/band/antenna switch test and DSI switch test.

.

Page 29

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

5.2 Plimit and Pmax measurement results
The measured Plimit for all the selected radio configurations given in Table 4-2 are listed in below Table 5-1. Pmax was also measured for radio configurations selected for testing time-varying Tx power transmission scenarios in order to generate test sequences following the test procedures in Section 3.1.

Table 5-1: Measured Plimit and Pmax of selected radio configurations

Test case Test scenario
#

Tech

Band Ant DSI Channel Freq

(MHz) BW

RB size

RB offset

mode

position

PdoestiatiiolsnsPetltimingit(EdBFmS )(tPdamBrgmaext)

measured Plimit (dBm)

measured Pmax (dBm)

1

GSM 850 1 3 251 848.8 - -

- GPRS(4 Tx slots) Back 5mm

24

26 23.8 25.2

2

GSM 1900 1 3 810 1909.8 - -

- GPRS(3 Tx slots) Back 5mm

17.7 22.7 17.5

23

3

WCDMA 2 1 3 9538 1907.6 - -

- RMC 12.2Kbps Back 5mm

16.5

23 16.5 23.5

4

WCDMA 4 1 6 1312 1712.4 - -

Time-Varying

5

LTE 7 7 3 21100 2535 20 1

- RMC 12.2Kbps

0

QPSK

Back Back

0mm 5mm

21.5 21.5

23 21.8 23 20.8

23.8 22.8

6

LTE 25 1 3 26590 1905 20 1 0

QPSK

Back 5mm

16.5

23 16.1 23.1

7

5G NR n25 2 3 376500 1882.5 20 108 54 DFT-15,BPSK

Back 5mm 21.5

23 21.6 23.2

8

5G NR n77 4 3 656000 3840 100 135 69 DFT-30,BPSK

Back 5mm

12

26 12.2 25.6

9

Call Drop

LTE 25 1 3 26590 1905 20 1 0

QPSK

Back 5mm

16.5

23 16.1 23.1

10 WIFI/BT back off LTE 25 1 3 26590 1905 20 1 0

QPSK

Back 5mm

16.5

23 16.1 23.1

LTE 25 1 3 26590 1905 20 1 11 Tech Switch
WCDMA 4 1 3 1312 1712.4 - -

0

QPSK

- RMC 12.2Kbps

Back Back

5mm 5mm

16.5 18.5

23 16.1 23 18.8

23.1 23.8

12 DSI Switch

LTE 25 1 3 26590 1905 20 1 0 LTE 25 1 6 26140 1860 20 1 0

QPSK QPSK

Back 5mm Bottom side 0mm

16.5 20

23 16.1 23 19.6

23.1 23.1

LTE 7 7 3 21100 2535 20 1 0 13 100s-60s-100s
LTE 48 4 3 56640 3690 20 1 99

QPSK QPSK

Back Back

5mm 5mm

21.5 17

23 20.8 21 17.6

22.8 22

14 60s-100s-60s

LTE 48 4 3 56640 3690 20 1 99 LTE 7 7 3 21100 2535 20 1 0

QPSK QPSK

Back Back

5mm 5mm

17 21.5

21 17.6 23 20.8

22 22.8

15

EN-DC SAR vs SAR

LTE 66 1 3 132572 1770 20 1 0 5G NR n77 4 3 656000 3840 100 135 69

QPSK DFT-30,BPSK

Back Back

5mm 5mm

18 12

23 18.3 26 12.2

23.4 25.6

Note: 1. The uncertainty of Pmax is +/-1 dB as provided by manufacturer.

.

Page 30

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.3 Time-varying Tx power measurement results

Report No. : FA1N0903A

The measurement setup is shown in Figures 5-1(a) and 5-1(c). The purpose of the timevarying Tx power measurement is to demonstrate the effectiveness of power limiting enforcement and that the time-averaged Tx power when represented in time-averaged 1gSAR or 10gSAR values does not exceed FCC limit as shown in Eq. (1a) and (1b), rewritten below:

( )

( )

(1a)



( )

(1b)

where,

( ),

, and

correspond to the measured instantaneous conducted Tx power, measured conducted

Tx power at Plimit, and measured 1gSAR and 10gSAR values at Plimit reported in Part 1

test (listed in Table 4-2 of this report as well).

Following the test procedure in Section 3.3, the conducted Tx power measurement for all selected configurations are reported in this section. In all the conducted Tx power plots, the dotted line represents the requested power by callbox (test sequence 1 or test sequence 2), the blue curve represents the instantaneous conducted Tx power measured using power meter, the green curve represents time-averaged power and red line represents the conducted power limit that corresponds to FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.

Similarly, in all the 1g or 10gSAR plots (when converted using Eq. (1a)), the green curve represents the 100s/60s-time averaged 1gSAR or 10gSAR value calculated based on instantaneous 1gSAR or 10gSAR; and the red line limit represents the FCC limit of 1.6 W/kg for 1gSAR or 4.0 W/kg for 10gSAR.

The power limiting enforcement is effective in all the tests, and the time-averaged 1gSAR does not exceed the SAR design target + device uncertainty for all the tested technologies/bands. Therefore, Qualcomm Smart Transmit time averaging feature is validated.

.

Page 31

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.3.1 GSM850
Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.998

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 32

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.863

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

.

Page 33

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.3.2 GSM1900
Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.163

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 34

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.104

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

.

Page 35

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.3.3 WCDMA Band 2
Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.914

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 36

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.923

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 37

Issued Date : Feb. 11, 2022

FCC RF Exposure Report
5.3.4 WCDMA Band 4 Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 10gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 10gSAR versus time does not exceed the FCC limit of 4.0 W/kg for 10gSAR:

(W/kg)

FCC 10gSAR limit

4.0

Max 100s-time averaged 10gSAR (green curve)

2.534

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 38

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 10gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 10gSAR versus time does not exceed the FCC limit of 4.0 W/kg for 10gSAR:

(W/kg)

FCC 10gSAR limit

4.0

Max 100s-time averaged 10gSAR (green curve)

2.542

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 39

Issued Date : Feb. 11, 2022

FCC RF Exposure Report
5.3.5 LTE Band 7 Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.975

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 40

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.993

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

.

Page 41

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.3.6 LTE Band 25
Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.834

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 42

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.835

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

.

Page 43

Issued Date : Feb. 11, 2022

FCC RF Exposure Report
5.3.7 5G NR FR1 N25 Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.019

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 44

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.054

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

.

Page 45

Issued Date : Feb. 11, 2022

FCC RF Exposure Report
5.3.8 5G NR FR1 N77 Test result for test sequence 1:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 60s-time averaged 1gSAR (green curve)

1.099

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 46

Issued Date : Feb. 11, 2022

FCC RF Exposure Report Test result for test sequence 2:

Report No. : FA1N0903A

Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

(W/kg)

FCC 1gSAR limit

1.6

Max 60s-time averaged 1gSAR (green curve)

1.109

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

.

Page 47

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 5.4 Change in Call Test Results

Report No. : FA1N0903A

This test was measured with LTE Band 25, DSI=3, and with callbox requesting maximum power. The call drop was manually performed when the EUT is transmitting at Preserve level as shown in the plot below (dotted black region). The measurement setup is shown in Figure 5-1. The detailed test procedure is described in Section 3.3.2.

Call drop test result:
Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power kept the same Preserve level of LTE Band 25 after the call was re-established:

Plot Notes: ... The conducted power plot shows expected Tx transition.
Plot 2: Above time-averaged conducted Tx power is converted/calculated into time-averaged 1gSAR using Equation (1a) and plotted below to demonstrate that the time-averaged 1gSAR versus time does not exceed the FCC limit of 1.6 W/kg for 1gSAR:

FCC 1gSAR limit Max 60s-time averaged 1gSAR (green curve)
Validated

(W/kg) 1.6 0.808

The test result validated the continuity of power limiting in Change in Call scenario.

.

Page 48

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

5.5 Change in technology/band test results

This test was conducted with callbox requesting maximum power, and with technology switch from LTE Band 25, DSI = 3 to WCDMA Band 4, DSI = 3. Following procedure detailed in Section 3.3.3, and using the measurement setup shown in Figure 5-1(a) and (c), the technology/band switch was performed when the EUT is transmitting at Preserve level as shown in the plot below (dotted black region).
Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power changed from LTE Band 25, DSI = 3 Preserve level to WCDMA Band 4, DSI = 3

Plot 2: All the time-averaged conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (6a), (6b) and (6c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0:

FCC normalized Exposure Ratio limit Max 100s-time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.556

The test result validated the continuity of power limiting in technology/band switch scenario.

.

Page 49

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

5.6 Change in DSI test results

This test was conducted with callbox requesting maximum power, and with DSI switch from LTE Band 25 DSI=3 to DSI = 6. Following procedure detailed in Section 3.3.5 using the measurement setup shown in Figure 5-1(a) and (c), the DSI switch was performed when the EUT is transmitting at Preserve level as shown in the plot below (dotted black circle).

Test result for change in DSI:
Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power changed when DSI=3 switches to DSI = 6.

Plot 2: All the time-averaged conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (6a), (6b) and (6c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0:

FCC normalized Exposure Ratio limit Max 60s-time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.521

The test result validated the continuity of power limiting in DSI switch scenario.

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FCC RF Exposure Report 5.7 Change in Time window / antenna switch test results

Report No. : FA1N0903A

5.7.1 Test case 1: transition from LTE Band 7 to LTE Band 48 (i.e., 100s to 60s), then back to LTE Band 7
Test result for change in time-window (from 100s to 60s to 100s):
Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power changed when LTE Band 7 switches to LTE Band 48 (~245 seconds timestamp) and switches back to LTE Band 7 (~310 seconds timestamp):

Plot Notes: The conducted power plot shows expected transitions in Tx power at ~245 seconds (100s-to-60s transition) and at ~310 seconds (60s-to-100s transition) in order to maintain total time-averaged RF exposure compliance across time windows, as show in next plot.

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Plot 2: All the conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (7a), (7b) and (7c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0. Equation (7a) is used to convert the Tx power of device to obtain 100s-averaged normalized SAR in LTE Band 7 as shown in black curve. Similarly, equation (7b) is used to obtain 60s-averaged normalized SAR in LTE Band 48 as shown in orange curve. Equation (7c) is used to obtain total time-averaged normalized SAR as shown in green curve (i.e., sum of black and orange curves).

FCC normalized Exposure Ratio Max time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.620

Plot Notes:
Maximum power is requested by callbox for the entire duration of the test, with tech/band switches from 100s-to-60s window at ~245s time stamp, and from 60s-to-100s window at ~310s time stamp. Smart Transmit controls the Tx power during these timewindow switches to ensure total time-averaged RF exposure, i.e., sum of black and orange curves given by equation (7c), is always compliant. In time-window switch test, at all times the total time averaged normalized RF exposure (green curve) should not exceed normalized SAR_design_target +1dB device uncertainty. In this test, with a maximum normalized SAR of 0.620 being  0.79 (=1.01/1.6 +1dB device uncertainty), the above test result validated the continuity of power limiting in time-window switch scenario.

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5.7.2 Test case 2: transition from LTE Band 48 to LTE Band 7 (i.e., 60s to 100s), then back to LTE Band 48

Test result for change in time-window (from 60s to 100s to 60s):
Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power changed when LTE Band 48 switches to LTE Band 7 (~185 seconds timestamp) and switches back to LTE Band 48 (~290 seconds timestamp):

Plot Notes: The conducted power plot shows expected transitions in Tx power at ~185 seconds (60s-to-100s transition) and at ~290 seconds (100s-to-60s transition) in order to maintain total time-averaged RF exposure compliance across time windows, as show in next plot.

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Plot 2: All the conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (7a), (7b) and (7c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0. Equation (7a) is used to convert the Tx power of device to obtain 60s-averaged normalized SAR in LTE Band 48 as shown in black curve. Similarly, equation (7b) is used to obtain 100s-averaged normalized SAR in LTE Band 7 as shown in orange curve. Equation (7c) is used to obtain total time-averaged normalized SAR as shown in green curve (i.e., sum of black and orange curves).

FCC normalized Exposure Ratio limit Max time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.632

Plot Notes:
Maximum power is requested by callbox for the entire duration of the test, with tech/band switches from 60s-to-100s window at ~185s time stamp, and from 100s-to-60s window at ~290s time stamp. Smart Transmit controls the Tx power during these time-window switches to ensure total time-averaged RF exposure, i.e., sum of black and orange curves given by equation (7c), is always compliant. In time-window switch test, at all times the total time averaged normalized RF exposure (green curve) should not exceed normalized SAR_design_target +1dB device uncertainty. In this test, with a maximum normalized SAR of 0.632 being  0.79 (=1.01/1.6 +1dB device uncertainty), the above test result validated the continuity of power limiting in time-window switch scenario.

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5.8 Switch in SAR exposure test results (EN-DC Combination) This test was conducted with callbox requesting maximum power, and with the EUT in LTE Band 66 + 5G NR FR1 n77. Following procedure detailed in Section 3.3.7 and Appendix B.2, and using the measurement setup shown in Figure 5-1, the SAR exposure switch measurement is performed with the EUT in various SAR exposure scenarios.

Plot 2: All the conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (7a), (7b) and (7c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0. Equation (7a) is used to convert the LTE Tx power of device to obtain 100s-averaged normalized SAR in LTE Band 66 as shown in black curve. Similarly, equation (7b) is used to obtain 60s-averaged normalized SAR in 5G NR FR1 n77 as shown in orange curve. Equation (7c) is used to obtain total time-averaged normalized SAR as shown in green curve (i.e., sum of black and orange curves).

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FCC normalized Exposure Ratio limit Max time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.674

Plot Notes:
Device starts predominantly in 5G NR SAR exposure scenario between 0s and 120s, and in LTE SAR + 5G NR SAR exposure scenario between 120s and 240s, and in predominantly in LTE SAR exposure scenario after t=240s. Here, Smart Transmit allocates a maximum of 100% of exposure margin (based on 3dB reserve margin setting) for 5G NR. This corresponds to a normalized 1gSAR exposure value = 1.040W/kg measured SAR at 5G NR Plimit /1.6W/kg limit = 0.650+ "+1dB~ -1dB" device related uncertainty (see orange curve between 0s~120s). For predominantly LTE SAR exposure scenario, maximum normalized 1gSAR exposure should correspond to 100% exposure margin = 0.957W/kg measured SAR at LTE Plimit /1.6W/kg limit = 0.598+ "+1dB~ -1dB" device related uncertainty (see black curve after t = 240s). Additionally, in SAR exposure switch test, at all times the total timeaveraged normalized RF exposure (green curve) should not exceed normalized SAR_design_target +1dB device uncertainty. In this test, with a maximum normalized SAR of 0.674 being  0.79 (=1.01/1.6 +1dB device uncertainty), the above test result validated the continuity of power limiting in SAR exposure switch scenario.

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FCC RF Exposure Report 5.9 Change in WIFI/Bluetooth Back off test results

Report No. : FA1N0903A

This test was conducted with callbox requesting maximum power for LTE Band 25, DSI=3. Following procedure detailed in Section 3.3.8, LTE Band 25 different in transmit power with WIFI/Bluetooth Back off transition one time window before and after WiFi/BT, indicated by dotted black ellipse in the Tx power plot, corresponds to the actual transition time before and after WiFi/BT.

Plot 1: Measured Tx power (dBm) versus time shows that the transmitting power changed for LTE Band 25, DSI=3 Preserve level with WIFI/Bluetooth Back off

Plot 2: All the time-averaged conducted Tx power measurement results were converted into time-averaged normalized SAR values using Equation (6a), (6b) and (6c), and plotted below to demonstrate that the normalized time-averaged RF exposure does not exceed the FCC limit of 1.0:

FCC normalized Exposure Ratio limit Max 100s-time averaged normalized Exposure Ratio (green curve)
Validated

Exposure Ratio 1.0 0.492

The test result validated the continuity of power limiting in Change WIFI/Bluetooth Back off scenario.

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6 SAR Test Results for Sub-6 Smart Transmit Feature Validation

6.1 Measurement setup The measurement setup is similar to normal SAR measurements (see Appendix F). The difference in SAR measurement setup for time averaging feature validation is that the callbox is signaling in close loop power control mode (instead of requesting maximum power in open loop control mode) and callbox is connected to the PC using GPIB so that the test script executed on PC can send GPIB commands to control the callbox's requested power over time (test sequence). The same test script used in conducted setup for time-varying Tx power measurements is also used in this section for running the test sequences during SAR measurements, and the recorded values from the disconnected power meter by the test script were discarded.
As mentioned in Section 3.4, for EUT to follow TPC command sent from the callbox wirelessly, the "path loss" between callbox antenna and the EUT needs to be very well calibrated. Since the SAR chamber is in uncontrolled environment, precautions must be taken to minimize the environmental influences on "path loss". Similarly, in the case of time-varying SAR measurements in 5G NR (with LTE as anchor), "path loss" between callbox antenna and the EUT needs to be carefully calibrated for both LTE link as well as for 5G NR link.
The EUT is placed in worst-case position according to Table 4-2.

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6.2 SAR measurement results for time-varying Tx power transmission scenario

Following Section 3.4 procedure, time-averaged SAR measurements are conducted using EX3DV4 probe at peak location of area scan over 500 seconds. cDASY6 system verification for SAR measurement is provided in Appendix C, and the associated SPEAG certificates are attached in Appendix D.

SAR probe integration times depend on the communication signal being tested. Integration times used by SPEAG for their probe calibrations can be downloaded from here (integration time is listed on the bottom of the first page for each tech):

https://www.speag.com/assets/downloads/services/cs/UIDSummary171205.pdf

Since the sampling rate used by cDASY6 for pointSAR measurements is not in user control, the number of points in 100s or 60s interval is determined from the scan duration setting in cDASY6 time-average pointSAR measurement by (100s or 60s / cDASY6_scan_duration * total number of pointSAR values recorded). Running average is performed over these number of points in excel spreadsheet to obtain 100s-/60s-averaged pointSAR.

Following Section 3.4, for each of selected technology/band (listed in Table 4-2):

1. With Reserve_power_margin set to 0 dB, area scan is performed at Plimit, and timeaveraged pointSAR measurements are conducted to determine the pointSAR at Plimit at peak location, denoted as pointSARPlimit.
2. With Reserve_power_margin set to actual (intended) value, two more time-averaged pointSAR measurements are performed at the same peak location for test sequences 1 and 2.

To demonstrate compliance, all the pointSAR measurement results were converted into 1gSAR or 10gSAR values by using Equation (3a), rewritten below:

( )

( )

(3a)

where,

( ),

, and

correspond to the measured

instantaneous point SAR, measured point SAR at Plimit from above step 1 and 2, and measured 1gSAR or 10gSAR values at Plimit obtained from Part 1 report and listed in Table

4-2 in Section 5.1 of this report.

The power limiting enforcement is effective in all the tests, and the time-averaged 1gSAR does not exceed the SAR design target + device uncertainty for all the tested technologies/bands. Therefore, Qualcomm Smart Transmit time averaging feature is validated.

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FCC RF Exposure Report 6.2.1 GSM850 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.851

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.753

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report 6.2.2 GSM1900 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.239

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.274

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report 6.2.3 WCDMA Band 2 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.941

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.935

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report 6.2.4 WCDMA Band 4 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 10gSAR limit

4.0

Max 100s-time averaged 10gSAR (green curve)

2.604

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 10gSAR limit

4.0

Max 100s-time averaged 10gSAR (green curve)

2.578

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

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FCC RF Exposure Report
6.2.6 LTE Band 7 SAR test results SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.006

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.813

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

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FCC RF Exposure Report 6.2.7 LTE Band 25 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.776

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

0.780

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

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FCC RF Exposure Report 6.2.8 5G NR FR1 N25 SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.027

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 100s-time averaged 1gSAR (green curve)

1.024

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

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FCC RF Exposure Report 6.2.9 5G NR FR1 N77 SA SAR test results
SAR test results for test sequence 1:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 60s-time averaged 1gSAR (green curve)

1.081

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit +1dB device uncertainty

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FCC RF Exposure Report SAR test results for test sequence 2:

Report No. : FA1N0903A

(W/kg)

FCC 1gSAR limit

1.6

Max 60s-time averaged 1gSAR (green curve)

1.075

Validated: Max time averaged SAR (green curve) does not exceed measured SAR at Plimit

+1dB device uncertainty

7 Conclusions
Qualcomm Smart Transmit feature employed has been validated through the conducted/ radiated power measurement, as well as SAR measurement. As demonstrated in this report, the power limiting enforcement is effective and the total normalized time-averaged RF exposure does not exceed 1.0 for all the transmission scenarios described in Section 2. Therefore, the EUT complies with FCC RF exposure requirement.

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FCC RF Exposure Report
Appendix A. Test Sequences

Report No. : FA1N0903A

1. Test sequence is generated based on below parameters of the EUT:
a. Measured maximum power (Pmax)
b. Measured Tx_power_at_SAR_design_target (Plimit)
c. Reserve_power_margin (dB)
 Preserve (dBm) = measured Plimit (dBm)  Reserve_power_margin (dB)
d. SAR_time_window (100s for FCC)
2. Test Sequence 1 Waveform:
Based on the parameters above, the Test Sequence 1 is generated with one transition between high and low Tx powers. Here, high power = Pmax; low power = Pmax/2, and the transition occurs after 80 seconds at high power Pmax. As long as the power enforcement is taking into effective during one 100s/60s time window, the validation test with this defined test sequence 1 is valid, otherwise, select other radio configuration (band/DSI within the same technology group) having lower Plimit for this test. The Test sequence 1 waveform is shown below:

Figure 0-1 Test sequence 1 waveform

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FCC RF Exposure Report 3. Test Sequence 2 Waveform:

Report No. : FA1N0903A

Based on the parameters in A-1, the Test Sequence 2 is generated as described in Table 10-1, which contains two 170 second-long sequences (yellow and green highlighted rows) that are mirrored around the center row of 20s, resulting in a total duration of 360 seconds:

Table 0-1 Test Sequence 2

Time duration (seconds)
15 20 20 10 20 15 15 20 10 15 10 20 10 15 10 20 15 15 20 10 20 20 15

dB relative to Plimit or Preserve
Preserve  2 Plimit
(Plimit + Pmax)/2 averaged in mW and rounded to nearest 0.1 dB step Preserve  6 Pmax Plimit Preserve  5 Pmax Preserve  3 Plimit Preserve  4
(Plimit + Pmax)/2 averaged in mW and rounded to nearest 0.1 dB step Preserve  4 Plimit Preserve  3 Pmax Preserve  5 Plimit Pmax Preserve  6
(Plimit + Pmax)/2 averaged in mW and rounded to nearest 0.1 dB step Plimit
Preserve  2

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FCC RF Exposure Report The Test Sequence 2 waveform is shown in Figure A-2.

Report No. : FA1N0903A

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Appendix B. Test Procedures for 5G NR + LTE Radio

Appendix B provides the test procedures for validating Qualcomm Smart Transmit feature for LTE + 5G NR non-standalone (NSA) mode transmission scenario, where sub6GHz LTE link acts as an anchor.
1 Time-varying Tx power test for 5G NR in NSA mode
Follows Section 3.2.1 to select test configurations for time-varying test. This test is performed with two pre-defined test sequences (described in Section 3.1) applied to 5G NR (with LTE on all-down bits or low power for the entire test after establishing the LTE+5G NR call with the callbox). Follow the test procedures described in Section 3.3.1 to demonstrate the effectiveness of power limiting enforcement and that the time averaged Tx power of 5G NR when converted into 1gSAR values does not exceed the regulatory limit at all times (see Eq. (1a) and (1b)). 5G NR response to test sequence1 and test sequence2 will be similar to other technologies (say, LTE), and are shown in Sections 6.3.7 and 6.3.8.

2 Switch in SAR exposure between LTE vs. 5G NR during transmission
This test is to demonstrate that Smart Transmit feature accurately accounts for switching in exposures among SAR for LTE radio only, SAR from both LTE radio and 5G NR, and SAR from 5G NR only scenarios, and ensures total time-averaged RF exposure compliance with FCC limit.

Test procedure:
1. Measure conducted Tx power corresponding to Plimit for LTE and 5G NR in selected band. Test condition to measure conducted Plimit is:
 Establish device in call with the callbox for LTE in desired band. Measure conducted Tx power corresponding to LTE Plimit with Smart Transmit enabled and Reserve_power_margin set to 0 dB, callbox set to request maximum power.
 Repeat above step to measure conducted Tx power corresponding to 5G NR Plimit. If testing LTE+5G NR in non-standalone mode, then establish LTE+5G NR call with callbox and request all down bits for radio1 LTE. In this scenario, with callbox requesting maximum power from 5G NR, measured conducted Tx power corresponds to radio2 Plimit (as radio1 LTE is at all-down bits)

2. Set Reserve_power_margin to actual (intended) value with EUT setup for LTE + 5G NR call. First, establish LTE connection in all-up bits with the callbox, and then 5G NR connection is added with callbox requesting UE to transmit at maximum power in 5G NR. As soon as the 5G NR connection is established, request all-down bits on LTE link (otherwise, 5G NR will not have sufficient RF exposure margin to sustain the call with LTE in all-up bits). Continue LTE (all-down bits)+5G NR transmission for

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more than one time-window duration to test predominantly 5G NR SAR exposure

scenario (as SAR exposure is negligible from all-down bits in LTE). After at least one

time-window, request LTE to go all-up bits to test LTE SAR and 5G NR SAR

exposure scenario. After at least one more time-window, drop (or request all-down

bits) 5G NR transmission to test predominantly LTE SAR exposure scenario.

Continue the test for at least one more time-window. Record the conducted Tx

powers for both LTE and 5G NR for the entire duration of this test.

3. Once the measurement is done, extract instantaneous Tx power versus time for both LTE and 5G NR links. Similar to technology/band switch test in Section 3.3.3, convert the conducted Tx power for both these radios into 1gSAR value (see Eq. (6a) and (6b)) using corresponding technology/band Plimit measured in Step 1, and then perform 100s running average to determine time-averaged 1gSAR versus time as illustrated in Figure 3-1.

4. Make one plot containing: (a) instantaneous Tx power versus time measured in Step 2.

5. Make another plot containing: (a) instantaneous 1gSAR versus time determined in Step 3, (b) computed time-averaged 1gSAR versus time determined in Step 3, and (c) corresponding regulatory 1gSARlimit of 1.6W/kg.

The validation criteria is, at all times, the time-averaged 1gSAR versus time shall not exceed the regulatory 1gSARlimit of 1.6W/kg.

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FCC RF Exposure Report
Appendix C. cDASY6 System Verification

Report No. : FA1N0903A

1 The system to be used for the near field power density measurement
 SPEAG DASY6 system  SPEAG cDASY6 5G module software  EUmmWVx probe  5G Phantom cover

2 Test Site Location
Sporton International Inc. (Shenzhen) is accredited to ISO/IEC 17025:2017 by American Association for Laboratory Accreditation with Certificate Number 5145.01.
Testing Laboratory

Test Firm

Sporton International Inc. (Shenzhen)

Test Site Location Test Site No.

1/F, 2/F, Bldg 5, Shiling Industrial Zone, Xinwei Village, Xili, Nanshan, Shenzhen, 518055 People's Republic of China

TEL: +86-755-86379589

FAX: +86-755-86379595

Sporton Site No.

FCC Designation No.

FCC Test Firm Registration No.

SAR02-SZ

CN1256

421272

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3 SAR E-Field Probe

Symmetric design with triangular core

Construction

Built-in shielding against static charges PEEK enclosure material (resistant to organic

solvents, e.g., DGBE)

Frequency

10 MHz  >6 GHz Linearity: 0.2 dB (30 MHz  6 GHz)

Directivity

0.3 dB in TSL (rotation around probe axis) 0.5 dB in TSL (rotation normal to probe axis)

Dynamic Range

10 W/g  >100 mW/g Linearity: 0.2 dB (noise: typically <1 W/g)

Overall length: 337 mm (tip: 20 mm)

Dimensions

Tip diameter: 2.5 mm (body: 12 mm) Typical distance from probe tip to dipole centers:

1 mm

4 Data Acquisition Electronics (DAE)
The data acquisition electronics (DAE) consists of a highly sensitive electrometer-grade preamplifier with auto-zeroing, a channel and gain-switching multiplexer, a fast 16 bit AD-converter and a command decoder and control logic unit. Transmission to the measurement server is accomplished through an optical downlink for data and status information as well as an optical uplink for commands and the clock.
The input impedance of the DAE is 200 MOhm; the inputs are symmetrical and floating. Common mode rejection is above 80 dB.

Report No. : FA1N0903A

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5 Test Equipment List

Manufacturer

Name of Equipment

Type/Model

Serial Number

Calibration

Last Cal.

Due Date

SPEAG

835MHz System Validation Kit

D835V2

4d258

May. 07, 2020 May. 06, 2023

SPEAG

1750MHz System Validation Kit

D1750V2

1090

Mar. 27, 2019 Mar. 25, 2022

SPEAG

1900MHz System Validation Kit

D1900V2

5d170

Mar. 26, 2019 Mar. 24, 2022

SPEAG

2600MHz System Validation Kit

D2600V2

1061

Nov. 26, 2020 Nov. 25, 2023

SPEAG

3900MHz System Validation Kit

D3900V2

1022

Jul. 11, 2019 Jul. 10, 2022

SPEAG

Data Acquisition Electronics

DAE4

1664

Mar. 01, 2021 Feb. 28, 2022

SPEAG

Dosimetric E-Field Probe

EX3DV4

7577

Nov. 23, 2021 Nov. 22, 2022

SPEAG

SAM Twin Phantom

QD 000 P40 CD

1670

NCR

NCR

SPEAG

Phone Positioner

N/A

N/A

NCR

NCR

Keysight

5G Wireless Test Platform

E7515B

MY59321595

Mar.8,2021

Mar.7,2022

R&S

Wideband Radio Communication Tester

CMW500

157651

Dec. 28, 2021 Dec. 27, 2024

Anritsu

Radio communication analyzer

MT8820C

6201300653

Jul. 14, 2021 Jul. 13, 2022

Anritsu

Radio communication analyzer

MT8821C

6262314715

Jun. 29, 2021 Jun. 28, 2022

Keysight

Network Analyzer

E5071C

MY46523671

Oct. 25, 2021 Oct. 24, 2022

Speag

Dielectric Assessment KIT

DAK-3.5

1138

Jun. 09, 2021 Jun. 08, 2022

Agilent

Signal Generator

N5181A

MY50145381

Dec. 28, 2021 Dec. 27, 2022

Anritsu

Power Senor

MA2411B

1306099

Sep. 29, 2021 Sep. 28, 2022

Anritsu

Power Meter

ML2495A

1349001

Sep. 29, 2021 Sep. 28, 2022

Anritsu

Power Sensor

MA2411B

1542004

Dec. 28, 2021 Dec. 27, 2022

R&S

Power Sensor

NRP50S

101254

Apr. 09, 2021 Apr. 08, 2022

R&S

Power Sensor

NRP8S

109228

Apr. 09, 2021 Apr. 08, 2022

R&S

Spectrum Analyzer

FSP7

100818

Jul. 14, 2021 Jul. 13, 2022

TES

Hygrometer

1310

200505600

Jul. 17, 2021 Jul. 16, 2022

Anymetre

Thermo-Hygrometer

JR593

2015030903

Dec. 30, 2021 Dec. 29, 2022

SPEAG

Device Holder

N/A

N/A

Note 1

AR

Amplifier

5S1G4

0333096

Note 1

mini-circuits

Amplifier

ZVE-3W-83+

599201528

Note 1

ARRA

Power Divider

A3200-2

N/A

Note 1

ET Industries

Dual Directional Coupler

C-058-10

N/A

Note 1

Weinschel

Attenuator 1

3M-10

N/A

Note 1

Weinschel

Attenuator 2

3M-20

N/A

Note 1

TRM

Directional Coupler

DCS1070

50021-1

Note 1

TRM

Directional Coupler

DCS1070

50021-2

Note 1

General Note: 1. Prior to system verification and validation, the path loss from the signal generator to the system check source and the power
meter, which includes the amplifier, cable, attenuator and directional coupler, was measured by the network analyzer. The reading of the power meter was offset by the path loss difference between the path to the power meter and the path to the system check source to monitor the actual power level fed to the system check source. 2. The dipole calibration interval can be extended to 3 years with justification according to KDB 865664 D01. The dipoles are also not physically damaged, or repaired during the interval. The justification data in appendix D can be found which the return loss is < -20dB, within 20% of prior calibration, the impedance is within 5 ohm of prior calibration for each dipole.

.

Page 83

Issued Date : Feb. 11, 2022

FCC RF Exposure Report 6 SAR system verification and validation

Report No. : FA1N0903A

6.1. Tissue Verification

The tissue dielectric parameters of tissue-equivalent media used for SAR measurements must be characterized within a temperature range of 18 to 25, measured with calibrated instruments and
apparatuses, such as network analyzers and temperature probes. The temperature of the tissueequivalent medium during SAR measurement must also be within 18 to 25 and within  2 of the
temperature when the tissue parameters are characterized. The tissue dielectric measurement system must be calibrated before use. The dielectric parameters must be measured before the tissue-equivalent
medium is used in a series of SAR measurements.

The liquid tissue depth was at least 15cm in the phantom for all SAR testing

The following tissue formulations are provided for reference only as some of the parameters have not been thoroughly verified. The composition of ingredients may be modified accordingly to achieve the desired target tissue parameters required for routine SAR evaluation.

Frequency (MHz)

Water

Sugar Cellulose

Salt

Preventol DGBE

Conductivity

Permittivity

(%)

(%)

(%)

(%)

(%)

(%)

()

(r)

835

40.3

57.9

0.2

1.4

0.2

0

0.90

41.5

1750, 1900, 2000 55.2

0

0

0.3

0

44.5

1.40

40.0

2300

55.0

0

0

0

0

45.0

1.67

39.5

2600

54.8

0

0

0.1

0

45.1

1.96

39.0

Simulating Liquid for 5GHz, Manufactured by SPEAG

Ingredients

(% by weight)

Water

64~78%

Mineral oil

11~18%

Emulsifiers

9~15%

Additives and Salt

2~3%



Frequency (MHz)

Liquid Temp.
()

Conductivity Permittivity Conductivity Permittivity

()

(r)

Target () Target (r)

835

22.8

0.900

43.200

0.90

41.50

1750

22.6

1.360

41.800

1.37

40.10

1900

22.6

1.420

41.500

1.40

40.00

2600

22.5

1.920

40.300

1.96

39.00

3900

22.6

3.330

37.400

3.33

37.51

Delta () (%)
0.00 -0.73 1.43 -2.04 0.00

Delta (r) (%)
4.10 4.24 3.75 3.33 -0.29

Limit (%)
5 5 5 5 5

Date
2022/2/4 2022/2/4 2022/2/4 2022/2/5 2022/2/5

.

Page 84

Issued Date : Feb. 11, 2022

FCC RF Exposure Report

Report No. : FA1N0903A

6.2. System Verification
Comparing to the original SAR value provided by SPEAG, the verification data should be within its specification of 10 %. Below table shows the target SAR and measured SAR after normalized to 1W input power. The table below indicates the system performance check can meet the variation criterion and the plots can be referred to Appendix C.


1g SAR
Date
2022/2/4 2022/2/4 2022/2/4 2022/2/5 2022/2/5

Frequency (MHz)
835 1750 1900 2600 3900

Input Power (mW)
250
250
250
250
100

10g SAR
Date
2022/2/4 2022/2/4 2022/2/4 2022/2/5 2022/2/5

Frequency (MHz)

Input Power (mW)

835

250

1750

250

1900

250

2600

250

3900

100

Dipole S/N
4d258 1090 5d170 1061 1022
Dipole S/N
4d258 1090 5d170 1061 1022

Probe S/N 7577 7577 7577 7577 7577
Probe S/N 7577 7577 7577 7577 7577

DAE S/N
1664 1664 1664 1664 1664

Measured 1g SAR (W/kg)

Targeted 1g SAR (W/kg)

Normalized 1g SAR (W/kg)

Deviation (%)

2.51

9.44

10.04

6.36

9.25

36.40

37

1.65

10.10 39.00

40.4

3.59

14.60 56.60

58.4

3.18

7.36

70.50

73.6

4.40

DAE S/N
1664 1664 1664 1664 1664

Measured 10g SAR
(W/kg)

Targeted 10g SAR
(W/kg)

Normalized 10g SAR (W/kg)

Deviation (%)

1.54

6.13

6.16

0.49

4.53

19.20

18.12

-5.62

5.12

20.30

20.48

0.89

6.33

25.10

25.32

0.88

2.45 24.60

24.5

-0.41

.

Page 85

Issued Date : Feb. 11, 2022

System Check_Head_835MHz

Date: 2022/2/4

D835V2-SN:4d258
Communication System: D835; Frequency: 835.0 Medium: HSL. Medium parameters used: f= 835.0 MHz; = 0.90 S/m; r = 43.2 Ambient Temperature: 23.6C; Liquid Temperature: 22.8C

DASY6 Configuration: - Probe: EX3DV4 - SN7577; ConvF(9.55, 9.55, 9.55); Calibrated: 2021/11/23 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1664; Calibrated: 2021/3/1 - Phantom: Twin-SAM V5.0 (30deg probe tilt); Serial: 1670; Section: Flat - Measurement Software: cDASY6 V6.6.0.13926 - UID: CW, 0-- MAIA: Area Scan: N/A; Zoom Scan: N/A

Area Scan (60.0 mm x 210.0 mm): Measurement Grid: 15.0 mm x 15.0 mm SAR (1g) = 2.41 W/kg; SAR (10g) = 1.56 W/kg;

Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 6.0 mm x 6.0 mm x 1.5 mm Power Drift = 0.03 dB SAR (1g) = 2.51 W/kg; SAR (10g) = 1.54 W/kg;

System Check_Head_1750MHz

Date: 2022/2/4

D1750V2-SN:1090
Communication System: D1750; Frequency: 1750.0 Medium: HSL. Medium parameters used: f= 1750.0 MHz; = 1.36 S/m; r = 41.8 Ambient Temperature: 23.9C; Liquid Temperature: 22.6C

DASY6 Configuration: - Probe: EX3DV4 - SN7577; ConvF(8.40, 8.40, 8.40); Calibrated: 2021/11/23 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1664; Calibrated: 2021/3/1 - Phantom: Twin-SAM V5.0 (30deg probe tilt); Serial: 1670; Section: Flat - Measurement Software: cDASY6 V6.6.0.13926 - UID: CW, 0-- MAIA: Area Scan: N/A; Zoom Scan: N/A

Area Scan (60.0 mm x 120.0 mm): Measurement Grid: 15.0 mm x 15.0 mm SAR (1g) = 8.21 W/kg; SAR (10g) = 4.60 W/kg;

Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 6.0 mm x 6.0 mm x 1.5 mm Power Drift = -0.03 dB SAR (1g) = 9.25 W/kg; SAR (10g) = 4.53 W/kg;

System Check_Head_1900MHz

Date: 2022/2/4

D1900V2-SN:5d170
Communication System: D1900; Frequency: 1900.0 Medium: HSL. Medium parameters used: f= 1900.0 MHz; = 1.42 S/m; r = 41.5 Ambient Temperature: 23.7C; Liquid Temperature: 22.6C

DASY6 Configuration: - Probe: EX3DV4 - SN7577; ConvF(8.13, 8.13, 8.13); Calibrated: 2021/11/23 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1664; Calibrated: 2021/3/1 - Phantom: Twin-SAM V5.0 (30deg probe tilt); Serial: 1670; Section: Flat - Measurement Software: cDASY6 V6.6.0.13926 - UID: CW, 0-- MAIA: Area Scan: N/A; Zoom Scan: N/A

Area Scan (60.0 mm x 120.0 mm): Measurement Grid: 15.0 mm x 15.0 mm SAR (1g) = 9.50 W/kg; SAR (10g) = 4.96 W/kg;

Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 6.0 mm x 6.0 mm x 1.5 mm Power Drift = 0.01 dB SAR (1g) = 10.1 W/kg; SAR (10g) = 5.12 W/kg;

System Check_Head_2600MHz

Date: 2022/2/5

D2600V2-SN:1061
Communication System: D2600; Frequency: 2600.0 Medium: HSL. Medium parameters used: f= 2600.0 MHz; = 1.92 S/m; r = 40.3 Ambient Temperature: 23.7C; Liquid Temperature: 22.5C

DASY6 Configuration: - Probe: EX3DV4 - SN7577; ConvF(7.68, 7.68, 7.68); Calibrated: 2021/11/23 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1664; Calibrated: 2021/3/1 - Phantom: Twin-SAM V5.0 (30deg probe tilt); Serial: 1670; Section: Flat - Measurement Software: cDASY6 V6.6.0.13926 - UID: CW, 0-- MAIA: Area Scan: N/A; Zoom Scan: N/A

Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 13.2 W/kg; SAR (10g) = 6.23 W/kg;

Zoom Scan (30.0 mm x 30.0 mm x 30.0 mm): Measurement Grid: 5.0 mm x 5.0 mm x 1.5 mm Power Drift = 0.05 dB SAR (1g) = 14.6 W/kg; SAR (10g) = 6.33 W/kg;

System Check_Head_3900MHz

Date: 2022/2/5

D3900V2-SN:1022

Communication System: D3900; Frequency: 3900.0 Medium: HSL. Medium parameters used: f= 3900.0 MHz; = 3.33 S/m; r = 37.4 Ambient Temperature: 23.6C; Liquid Temperature: 22.6C

DASY6 Configuration: - Probe: EX3DV4 - SN7577; ConvF(6.15, 6.15, 6.15); Calibrated: 2021/11/23 - Sensor-Surface: 1.4 mm - Electronics: DAE4 Sn1664; Calibrated: 2021/3/1 - Phantom: Twin-SAM V5.0 (30deg probe tilt); Serial: xxxx; Section: Flat - Measurement Software: cDASY6 V6.6.0.13926 - UID: 5G NR FR1 TDD, 10866-AAC - MAIA: Area Scan: N/A; Zoom Scan: N/A

Area Scan (40.0 mm x 80.0 mm): Measurement Grid: 10.0 mm x 10.0 mm SAR (1g) = 6.68 W/kg; SAR (10g) = 2.44 W/kg;

Zoom Scan (28.0 mm x 28.0 mm x 28.0 mm): Measurement Grid: 5.0 mm x 5.0 mm x 1.4 mm Power Drift = 0.01 dB SAR (1g) = 7.36 W/kg; SAR (10g) = 2.45 W/kg;



Related FCC IDs: