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14040868 App H Body Detect Validation

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Document DEVICE REPORTGetApplicationAttachment.html?id=6103041
Model Number: A2632 Date: 7/29/2022
POWER REDUCTION VERIFICATION
This device supports manufacturer's proprietary power reduction mechanism called, `Detect mode' for the cellular, Wi-Fi and Bluetooth transmitters. There are additional power reduction mechanisms for the Wi-Fi and Bluetooth transmitters based on the operating state of the cellular and (for Bluetooth) Wi-Fi transmitters. Details of these
mechanisms can be found in the Operational Description.
The verification plan consists of measuring the power levels of the cellular, Bluetooth and Wi-Fi transmitters under different operating conditions related to the power reduction mechanisms.
A. Verification of Body Detect mechanism was performed for the following test cases for cellular, Wi-Fi and Bluetooth transmitters.
· In-hand · On a stationary object (placed on a table)
B. Verification of power reduction levels for Wi-Fi was performed with cellular transmitter on and off.
C. Verification of power reduction levels for Bluetooth and Wi-Fi was performed with different combinations of cellular transmitter on and off and Wi-Fi transmitter on and off.
For testing purposes the device was loaded with a power table1 for each transmitter that had different power settings for each of the operating states. The target / expected power level and measured power levels are detailed in the following tables and clearly show that mechanisms operate as expected.
RLAN: Based on the utilization ratio, a power control algorithm will allow the active WLAN to increase power until the utilization ratio approaches the limit. The algorithm will then disable the power increase until the utilization ratio decreases. A predictive power control feature further ensures regulatory compliance by disabling all transmitters if there are any scenarios where aggregate maximum WLAN transmissions over the next 1-second interval could cause the utilization ratio to exceed the regulatory limit.
Smart Tx: This device incorporates the Smart Transmit (SmartTX) SAR averaging algorithm provided by Qualcomm for cellular technologies. SmartTX contrils the Tx power of the cellular-based wireless device in real-time to maintain the time-averaged Tx power, and in turn, time-averaged RF exposure, below the predefined time-averaged power limit characterized for each technology and band.

Model Number: A2632 Date: 7/29/2022

Table 1 ­Body detect validation for cellular

Target Power

Measured Power

Air Transport

Band

Mode A (Head)

Mode B (Body) Stationary

In Hand

On Knee

GSM

1900 (2Slots) 31.00 dBm

27.50 dBm

28.50 dBm 20.30 dBm 25.10 dBm

WCDMA

B4

25.20 dBm

19.10 dBm

20.10 dBm 12.20 dBm 17.30 dBm

B2

25.70 dBm

21.50 dBm

21.40 dBm 13.90 dBm 19.20 dBm

B25

25.70 dBm

21.50 dBm

21.40 dBm 14.80 dBm 18.90 dBm

LTE FDD

B30

25.70 dBm

21.40 dBm

22.40 dBm 14.40 dBm 19.40 dBm

B7

25.30 dBm

19.70 dBm

19.40 dBm 12.70 dBm 17.20 dBm

LTE TDD

B41

25.70 dBm

22.20 dBm

23.20 dBm 15.20 dBm 20.70 dBm

B48

23.90 dBm

21.60 dBm

21.60 dBm 14.30 dBm 19.60 dBm

All measured values were within the expected tolerances of the target / expected power levels programmed into the

power table for the head versus body states. Mechanism of body detect was verified.

1 The power tables used for the mechanism validation may not match the production power tables detailed in the main SAR report because production power levels are not established at the time these measurements were made.

Model Number: A2632 Date: 7/29/2022

Table 2 ­Body detect and Cellular State validation for Wi-Fi

Body detect

Head (device stationary on table)

Body (device in hand)

Cellular State

ON

OFF

ON

OFF

2.4 GHz 11n HT20 Ch6 SISO

E: 16 M: 15.9

E: 20.5 M: 20.3

E: 17.75 M: 17.7

E: 20.75 M: 20.6

5.0 GHz 802.11n HT20 Ch40
SISO Ant6

E: 13.5 M: 13.2

E: 18 M: 17.8

E: 14 M: 13.75

E: 18 M: 17.65

All measured power values (M) were within the expected tolerances of the target / expected power levels (E)

programmed into the power table for the head versus body and cellular on/off states. Mechanism of body detect

and cellular state was verified

Table 3 ­Body detect and Cellular State validation for Wi-Fi

Body detect

Head (device on table)

Body (device in hand)

Cellular State

ON

OFF

ON

OFF

5GHz Wi-Fi

ON

OFF

ON

OFF

ON

OFF

ON

OFF

state

Expected power
condition

Plow mode A BT Table
P1

PHigh mode A BT Table
P3

PHigh mode A BT Table
P5

PStandalone BT Table
P7

Plow mode B BT Table
P2

PHigh mode B BT Table
P4

PHigh mode B BT Table
P6

PStandalone BT Table
P8

Power (dBm)

E: 8 M: 7.7

E: 14 M: 13.8

E: 14 M: 13.7

E: 18.5 M: 18.1

E: 9 M: 8.9

E: 15 M: 14.75

E: 15 M: 14.8

E: 18.5 M: 18.35

Bluetooth transmitter set for channel 39 in EDR mode.

All measured power values (M) were within the expected tolerances of the target / expected power levels (E)

programmed into the power table for the head versus body, cellular on/off and Wi-Fi on/off states. Mechanism of

body detect and cellular state and Wi-Fi state was verified

2 The power tables used for the mechanism validation may not match the production power tables detailed in the main SAR report because production power levels are not established at the time these measurements were made



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