Kezhi(HuiZhou) Electronic Technology Co., Ltd. Sunspring Electronics Co., Ltd. Test Report BT

Shenzhen Sunspring Electronics Co., Ltd.

Keyboard

OJWCG107C

Violet Wang

Test Report BT

Kezhi(HuiZhou) Electronic Technology Co., Ltd. K75PRO Mechanical keyboard 2BBA6-K75PRO 2BBA6K75PRO k75pro

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Page 1 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

FCC TEST REPORT FOR
Kezhi(HuiZhou) Electronic Technology Co., Ltd. Mechanical keyboard Test Model: K75Pro

Prepared for Address

: Kezhi(HuiZhou) Electronic Technology Co., Ltd.

Main building No.8, Minying 1st road, Yuanzhou Town, Boluo County, Huizhou City, Guangdong Province, China

Prepared by
Address
Tel Fax Web Mail

: Shenzhen LCS Compliance Testing Laboratory Ltd. 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park
: Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China
: (+86)755-82591330 : (+86)755-82591332 : www.LCS-cert.com : [email protected]

Date of receipt of test sample Number of tested samples Sample No. Serial number Date of Test Date of Report

: May 25, 2023 : 2 A030323015-1, A030323015-2
: Prototype : May 25, 2023 ~ June 01, 2023 : June 01, 2023

Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 2 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

FCC TEST REPORT FCC CFR 47 PART 15 C (15.247)

Report Reference No. ................. : LCSA030323015EA Date of Issue ................................... : June 01, 2023

Testing Laboratory Name ............ : Shenzhen LCS Compliance Testing Laboratory Ltd.

Address ........................................... :

101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China

: Full application of Harmonised standards Testing Location/ Procedure........... Partial application of Harmonised standards
Other standard testing method

Applicant's Name.......................... : Kezhi(HuiZhou) Electronic Technology Co., Ltd.

Address ........................................... :

Main building No.8, Minying 1st road, Yuanzhou Town, Boluo County, Huizhou City, Guangdong Province, China

Test Specification

Standard.......................................... : FCC CFR 47 PART 15 C (15.247)

Test Report Form No. ..................... : LCSEMC-1.0

TRF Originator ................................ : Shenzhen LCS Compliance Testing Laboratory Ltd.

Master TRF ..................................... : Dated 2011-03

Shenzhen LCS Compliance Testing Laboratory Ltd. All rights reserved.
This publication may be reproduced in whole or in part for non-commercial purposes as long as the Shenzhen LCS Compliance Testing Laboratory Ltd. is acknowledged as copyright owner and source of the material. Shenzhen LCS Compliance Testing Laboratory Ltd. takes no responsibility for and will not assume liability for damages resulting from the reader's interpretation of the reproduced material due to its placement and context.
Test Item Description. .................. : Mechanical keyboard

Trade Mark...................................... :
,
Test Model ...................................... : K75Pro Ratings ............................................ : Input: DC 5V, 200mA
DC 3.7V by Rechargeable Li-ion Battery, 3750mAh Result ........................................... : Positive

Compiled by:

Supervised by:

Approved by:

Kay Hu/ Administrator

Cary Luo/ Technique principal

Gavin Liang / Manager

Page 3 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

FCC -- TEST REPORT
Test Report No. : LCSA030323015EA

June 01, 2023 Date of issue

Test Model.............................. : K75Pro
EUT......................................... : Mechanical keyboard
Applicant............................... : Kezhi(HuiZhou) Electronic Technology Co., Ltd. Address................................... : Main building No.8, Minying 1st road, Yuanzhou Town,
Boluo County, Huizhou City, Guangdong Province, China Telephone............................... : / Fax.......................................... : /
Manufacturer......................... : Kezhi(HuiZhou) Electronic Technology Co., Ltd. Address................................... : Main building No.8, Minying 1st road, Yuanzhou Town,
Boluo County, Huizhou City, Guangdong Province, China Telephone............................... : / Fax.......................................... : /
Factory................................... : Kezhi(HuiZhou) Electronic Technology Co., Ltd. Address................................... : Main building No.8, Minying 1st road, Yuanzhou Town,
Boluo County, Huizhou City, Guangdong Province, China Telephone............................... : / Fax.......................................... : /

Test Result

Positive

The test report merely corresponds to the test sample. It is not permitted to copy extracts of these test result without the written permission of the test laboratory.

Page 4 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Report Version 000

Revision History

Issue Date June 01, 2023

Revision Content Initial Issue

Revised By ---

Page 5 of 36

FCC ID: 2BBA6-K75PRO

TABLE OF CONTENTS

Report No.: LCSA030323015EA

Description

Page

1. GENERAL INFORMATION .................................................................................................... 6

1.1 Description of Device (EUT) ......................................................................................................... 6 1.2 Support equipment List ................................................................................................................ 7 1.3 External I/O Cable ........................................................................................................................ 7 1.4 Description of Test Facility ........................................................................................................... 7 1.5 Statement of the Measurement Uncertainty ................................................................................. 7 1.6 Measurement Uncertainty ............................................................................................................ 8 1.7 Description of Test Modes............................................................................................................ 8

2. TEST METHODOLOGY ......................................................................................................... 9

2.1 EUT Configuration........................................................................................................................ 9 2.2 EUT Exercise ............................................................................................................................... 9 2.3 General Test Procedures ............................................................................................................. 9 2.4. Test Sample ................................................................................................................................ 9

3. SYSTEM TEST CONFIGURATION ...................................................................................... 10

3.1 Justification ................................................................................................................................ 10 3.2 EUT Exercise Software .............................................................................................................. 10 3.3 Special Accessories ................................................................................................................... 10 3.4 Block Diagram/Schematics ........................................................................................................ 10 3.5 Equipment Modifications ............................................................................................................ 10 3.6 Test Setup.................................................................................................................................. 10

4. SUMMARY OF TEST RESULTS..........................................................................................11

5. SUMMARY OF TEST EQUIPMENT ..................................................................................... 12

6. MEASUREMENT RESULTS ................................................................................................ 13

6.1. Frequency Separation and 20 dB Bandwidth ............................................................................ 13 6.2. Peak Power............................................................................................................................... 14 6.3. Time of Occupancy (Dwell Time) .............................................................................................. 15 6.4. Number of Hopping Frequency ................................................................................................. 16 6.5. Band Edges Measurements and Conducted Spurious Emissions Test ..................................... 17 6.6. Restricted Band Emission Limit ................................................................................................. 18 6.7. AC Power Line Conducted Emissions ....................................................................................... 29 6.8. Emissions in Restricted Bands .................................................................................................. 32 6.9. Pseudorandom Frequency Hopping Sequence ......................................................................... 34 6.10. Antenna Requirement ............................................................................................................. 35

7. TEST SETUP PHOTOGRAPHS OF EUT.............................................................................36

8. EXTERIOR PHOTOGRAPHS OF THE EUT ........................................................................ 36

9. INTERIOR PHOTOGRAPHS OF THE EUT..........................................................................36

Page 6 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

1. GENERAL INFORMATION

1.1 Description of Device (EUT)

EUT

: Mechanical keyboard

Test Model

: K75Pro

Power Supply Hardware Version

: Input: DC 5V, 200mA DC 3.7V by Rechargeable Li-ion Battery, 3750mAh
: K75PRO

Software Version

: K916 RK863-D 2.0

Bluetooth

Frequency Range

: 2402MHz~2480MHz

Channel Number Channel Spacing Modulation Type Bluetooth Version

: 79 channels for Bluetooth V5.0 (DSS) 40 channels for Bluetooth V5.0 (DTS)
: 1MHz for Bluetooth V5.0 (DSS) 2MHz for Bluetooth V5.0 (DTS)
: GFSK, /4-DQPSK, 8-DPSK for Bluetooth V5.0 (DSS) GFSK for Bluetooth V5.0 (DTS)
: V5.0

Antenna Description : PCB Antenna, 2.34dBi(Max.)

2.4G

Frequency Range

: 2403MHz-2480MHz

Channel Number Modulation Type Antenna Description

: 16 : GFSK : PCB Antenna, 2.34dBi(max.)

Page 7 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

1.2 Support equipment List

Manufacturer

Description

Model

Lenovo

TP00094A

SHENZHEN TIANYIN ELECTRONICS CO.,
LTD

Power Adapter

TPA-46050200 UU

Note: Auxiliary equipment is provided by the laboratory.

Serial Number ---
---

Certificate FCC
FCC

1.3 External I/O Cable I/O Port Description Type-C Port USB Port

Quantity 2 1

Cable N/A N/A

1.4 Description of Test Facility
NVLAP Accreditation Code is 600167-0. FCC Designation Number is CN5024. CAB identifier is CN0071. CNAS Registration Number is L4595. Test Firm Registration Number: 254912.
The 3m-Semi anechoic test site fulfils CISPR 16-1-4 according to ANSI C63.10:2013 and CISPR 16-1-4:2010 SVSWR requirement for radiated emission above 1GHz.

1.5 Statement of the Measurement Uncertainty
The data and results referenced in this document are true and accurate. The reader is cautioned that there may be errors within the calibration limits of the equipment and facilities. The measurement uncertainty was calculated for all measurements listed in this test report acc. To CISPR 16 4 "Specification for radio disturbance and immunity measuring apparatus and methods Part 4: Uncertainty in EMC Measurements" and is documented in the LCS quality system acc. To DIN EN ISO/IEC 17025. Furthermore, component and process variability of devices similar to that tested may result in additional deviation. The manufacturer has the sole responsibility of continued compliance of the device.

Page 8 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

1.6 Measurement Uncertainty

Test Item

Frequency Range

Uncertainty

Note

9KHz~30MHz

±3.10dB

(1)

30MHz~200MHz

±2.96dB

(1)

Radiation Uncertainty : 200MHz~1000MHz

±3.10dB

(1)

1GHz~26.5GHz

±3.80dB

(1)

26.5GHz~40GHz

±3.90dB

(1)

Conduction Uncertainty :

150kHz~30MHz

±1.63dB

(1)

Power disturbance :

30MHz~300MHz

±1.60dB

(1)

Output power

1GHz-40GHz

±0.57dB

(1)

Occupied Channel :

1GHz-40GHz

±5%

(1)

Bandwidth

Conducted RF Spurious :

9kHz-40GHz

±1.80dB

(1)

Emission

Emissions in Restricted :

1GHz-40GHz

±2.47dB

(1)

Bands

(1). This uncertainty represents an expanded uncertainty expressed at approximately the 95%

confidence level using a coverage factor of k=2.

1.7 Description of Test Modes
Bluetooth operates in the unlicensed ISM Band at 2.4GHz. With basic data rate feature, the data rates can be up to 1 Mb/s by modulating the RF carrier using GFSK techniques. The EUT works in the X-axis, Y-axis, Z-axis. The following operating modes were applied for the related test items. All test modes were tested, only the result of the worst case was recorded in the report.

Mode of Operations

Frequency Range (MHz)

Data Rate (Mbps)

2402

1/2/3

2441

1/2/3

2480

1/2/3

For Conducted Emission

Test Mode

TX Mode/Hopping Mode

For Radiated Emission

Test Mode

TX Mode/Hopping Mode

Worst-case mode and channel used for 150 KHz-30 MHz power line conducted emissions was determined to be TX (3Mbps-High Channel).
Worst-case mode and channel used for 9 KHz-1000 MHz radiated emissions was determined to be TX (3Mbps-High Channel).
Pre-test AC conducted emission at charge from 2Mbps-High Channel mode, recorded worst case.
Pre-test AC conducted emission at both voltage AC 120V/60Hz and AC 240V/60Hz, recorded worst case.
AC conducted emission pre-test at power adapter modes, recorded worst case.

Page 9 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

2. TEST METHODOLOGY
The tests documented in this report were performed in accordance with ANSI C63.10-2013, FCC CFR PART 15C 15.207, 15.209 and 15.247.
2.1 EUT Configuration
The EUT configuration for testing is installed on RF field strength measurement to meet the Commissions requirement and operating in a manner that intends to maximize its emission characteristics in a continuous normal application.
2.2 EUT Exercise
The EUT was operated in the normal operating mode for Hopping Numbers and Dwell Time test and a continuous transmits mode for other tests.
According to its specifications, the EUT must comply with the requirements of the Section 15.207, 15.209, 15.247 under the FCC Rules Part 15 Subpart C.
2.3 General Test Procedures
2.3.1 Conducted Emissions
The EUT is placed on the turntable, which is 0.8 m above ground plane. According to the requirements in Section 6.1.1 of ANSI C63.10-2013 Conducted emissions from the EUT measured in the frequency range between 0.15 MHz and 30MHz using Quasi-peak and average detector modes.
2.3.2 Radiated Emissions
The EUT is placed on a turn table, which is 0.8 m above ground plane below 1GHz and 1.5 m above ground plane above 1GHz. The turntable shall rotate 360 degrees to determine the position of maximum emission level. EUT is set 3m away from the receiving antenna, which varied from 1m to 4m to find out the highest emission. And also, each emission was to be maximized by changing the polarization of receiving antenna both horizontal and vertical. In order to find out the maximum emissions, exploratory radiated emission measurements were made according to the requirements in Section 6.4 of ANSI C63.10-2013

2.4. Test Sample
The application provides 2 samples to meet requirement;

Sample Number Sample 1(A030323015-1) Sample 2(A030323015-2)

Description Engineer sample continuous transmit Normal sample Intermittent transmit

Page 10 of 36

FCC ID: 2BBA6-K75PRO

3. SYSTEM TEST CONFIGURATION

Report No.: LCSA030323015EA

3.1 Justification
The system was configured for testing in a continuous transmits condition.
3.2 EUT Exercise Software
The system was configured for testing in a continuous transmits condition and change test channels by software (BK32xx RF Test_V1.9.1) provided by application.
3.3 Special Accessories

Manufacturer --

Description --

Model --

Serial Number --

Certificate --

3.4 Block Diagram/Schematics
Please refer to the related document.
3.5 Equipment Modifications
Shenzhen LCS Compliance Testing Laboratory Ltd. has not done any modification on the EUT.
3.6 Test Setup
Please refer to the test setup photo.

Page 11 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

4. SUMMARY OF TEST RESULTS

FCC Rules §15.247(a)
§15.247(b)(1)
§15.247(a)(1)
§15.247(a)(1)
§15.247(a)(1)
§15.209(a)
§15.247(d)
§15.205 §15.207(a)
§15.203 §15.247(i)§1.1310 §15.247(i)§2.1093

Applied Standard: FCC Part 15 Subpart C

Description of Test

Test Sample

Result

20dB Bandwidth

Sample 1 Compliant

Maximum Peak Conducted Output Power

Sample 1 Compliant

Frequency Separation

Sample 1 Compliant

Time Of Occupancy (Dwell Time)

Sample 1 Compliant

Number Of Hopping Frequency

Sample 1

Compliant

Radiated Spurious Emissions

Sample 1 Sample 2

Compliant

Band Edges Measurements and Conducted Spurious Emissions

Sample 1

Compliant

Emissions at Restricted Band

Sample 1 Compliant

AC Mains Conducted Emissions Sample 2 Compliant

Antenna Requirements

Sample 1 Compliant

RF Exposure

N/A

Compliant

Remark: 1. Note 1 Test results inside test report; 2. Note 2 Test results in other test report (RF Exposure Evaluation);

Remark Appendix A.1
Appendix A.2
Appendix A.3
Appendix A.4
Appendix A.5
Note 1
Appendix A.6 Appendix A.7 Appendix A.8
Note 1 Note 1
Note 2

Page 12 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

5. SUMMARY OF TEST EQUIPMENT

Item

Equipment

Power Meter

Power Sensor

Test Software

RF Control Unit

MXA Signal Analyzer

DC Power Supply

EMI Test Software

9 3m Semi Anechoic Chamber

Positioning Controller

Active Loop Antenna

By-log Antenna

Horn Antenna

14 Broadband Horn Antenna

Broadband Preamplifier

EMI Test Receiver

17 RS SPECTRUM ANALYZER

Broadband Preamplifier

6dB Attenuator

3dB Attenuator

EMI Test Receiver

Artificial Mains

10dB Attenuator

EMI Test Software

Manufacturer R&S R&S R&S
Tonscend Tonscend
Agilent Agilent AUDIX SIDT FRANKONIA Max-Full SCHWARZBECK SCHWARZBECK SCHWARZBECK SCHWARZBECK SCHWARZBECK
R&S R&S
/ / / R&S R&S SCHWARZBECK Farad

Model No. NRVS
NRV-Z81 NRV-Z32 JS1120-2 JS0806-2 N9020A E3642A
E3
SAC-3M
MF7802BS FMZB 1519B
VULB9163 BBHA 9120D BBHA 9170
BBV9719 ESR 7 FSP40
BP-01M18G 100W/6dB
2N-3dB ESPI
ENV216 MTS-IMP-136
EZ

Serial No. 100444 100458 10057 / N/A
MY50510140 N/A /

Cal Date 2022-06-16 2022-06-16 2022-06-16
N/A 2022-10-29 2022-10-29 2022-10-29
N/A

Due Date 2023-06-15 2023-06-15 2023-06-15
N/A 2023-10-28 2023-10-28 2023-10-28
N/A

03CH03-HY

2022-06-16 2023-06-15

MF780208586 00005
9163-470 9120D-1925
791 9719-025 101181 100503 P190501 1172040
/ 101940 101288 261115-001-0032
/

N/A 2021-08-29 2021-09-12 2021-09-05 2021-08-29 2022-06-16 2022-06-16 2022-10-29 2022-06-16 2022-06-16 2022-10-29 2022-08-18 2022-06-16 2022-06-16
N/A

N/A 2024-08-28 2024-09-11 2024-09-04 2024-08-28 2023-06-15 2023-06-15 2023-10-28 2023-06-15 2023-06-15 2023-10-28 2023-08-17 2023-06-15 2023-06-15
N/A

Page 13 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6. MEASUREMENT RESULTS
6.1. Frequency Separation and 20 dB Bandwidth
6.1.1 Limit
According to §15.247(a), Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hopping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 2400-2483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW.
6.1.2 Block Diagram of Test Setup

6.1.3 Test Procedure Frequency separation test procedure 1). Place the EUT on the table and set it in transmitting mode. 2). Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to the Spectrum Analyzer. 3). Set center frequency of Spectrum Analyzer = middle of hopping channel. 4). Set the Spectrum Analyzer as RBW = 30 kHz, VBW = 100 kHz, Span = wide enough to capture the peaks of two adjacent channels, Sweep = auto. 5). Max hold, mark 2 peaks of hopping channel and record the 2 peaks frequency.
20dB bandwidth test procedure 1). Span = approximately 2 to 3 times the 20 dB bandwidth, centered on a hopping channel. 2). RBW 1% of the 20 dB bandwidth, VBW RBW. 3). Detector function = peak. 4). Trace = max hold.
6.1.4 Test Results
6.1.4.1 20dB Bandwidth
PASS
Please refer to Appendix A.1 Remark: 1. Test results including cable loss; 2. Measured 20dB Bandwidth at difference Packet Type for each mode and recorded worst case for each
mode. 3. Worst case data at DH5 for GFSK, 2DH5 for /4-DQPSK, 3DH5 for 8-DPSK modulation type;
6.1.4.2 Frequency Separation
PASS
Please refer to Appendix A.3
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 14 of 36
6.2. Peak Power
6.2.1 Block Diagram of Test Setup

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.2.2 Limit According to §15.247(b)(1), For frequency hopping systems operating in the 24002483.5 MHz band employing at least 75 non-overlapping hopping channels, and all frequency hopping systems in the 57255850 MHz band: 1 watt. For all other frequency hopping systems in the 24002483.5 MHz band: 0.125 watts.
6.2.3 Test Procedure The transmitter output is connected to the spectrum.
6.2.4. Test Procedures 1) Span: Approximately five times the 20 dB bandwidth, centered on a hopping channel. 2) RBW > 20 dB bandwidth of the emission being measured. 3) VBW RBW. 4) Sweep: Auto. 5) Detector function: Peak. 6) Trace: Max hold.
6.2.5 Test Results
PASS Please refer to Appendix A.2
Remark: 1. Test results including cable loss; 2. Measured output power at difference Packet Type for each mode and recorded worst case for each
mode.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 15 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.3. Time of Occupancy (Dwell Time)
6.3.1 Limit According to §15.247(a)(1), Frequency hopping systems operating in the 2400MHz- 2483.5 MHz bands. The average time of occupancy on any channels shall not greater than 0.4 s within a period 0.4 s multiplied by the number of hopping channels employed.
6.3.2 Block Diagram of Test Setup

6.3.3 Test Procedure 1). Place the EUT on the table and set it in transmitting mode. 2). Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to the Spectrum Analyzer. 3). Set center frequency of Spectrum Analyzer = operating frequency. 4). Set the Spectrum Analyzer as RBW=1MHz, VBW=3MHz, Span = 0Hz, Sweep = auto. 5). Repeat above procedures until all frequency measured was complete.
6.3.4 Test Results
The Dwell Time=Burst Width*Total Hops. The detailed calculations are showed as follows: The duration for dwell time calculation: 0.4[s]*hopping number=0.4[s]*79[ch] =31.6[s*ch]; The burst width [ms/hop/ch], which is directly measured, refers to the duration on one channel hop. The hops per second for all channels: The selected EUT Conf uses a slot type of 5-Tx&1-Rx and a hopping rate of 1600 [ch*hop/s] for all channels. So the final hopping rate for all channels is 1600/6=266.67 [ch*hop/s] The hops per second on one channel: 266.67 [ch*hops/s]/79 [ch] =3.38 [hop/s]; The total hops for all channels within the dwell time calculation duration: 3.38 [hop/s]*31.6[s*ch]=106.67 [hop*ch]; The dwell time for all channels hopping: 106.67 [hop*ch]*Burst Width [ms/hop/ch].
PASS Please refer to Appendix A.4
Remark: 1. Test results including cable loss; 2. Measured at difference Packet Type for each mode and recorded worst case for each mode. 3. Dwell Time Calculate formula:
DH5: Dwell time=Pulse Time (ms) × (1600 ÷6 ÷79) ×31.6 Second
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 16 of 36

FCC ID: 2BBA6-K75PRO

6.4. Number of Hopping Frequency

Report No.: LCSA030323015EA

6.4.1 Limit According to §15.247(a)(1), Frequency hopping systems operating in the band 2400-2483.5 MHz shall use at least 15 hopping channels.
6.4.2 Block Diagram of Test Setup

6.4.3 Test Procedure 1). Place the EUT on the table and set it in transmitting mode. 2). Remove the antenna from the EUT and then connect a low loss RF cable from the antenna port to the Spectrum Analyzer. 3). Set Spectrum Analyzer Start=2400MHz, Stop = 2483.5MHz, Sweep = auto. 4). Set the Spectrum Analyzer as RBW=100KHz, VBW=300KHz. 5). Max hold, view and count how many channel in the band.
6.4.4 Test Results
PASS Please refer to Appendix A.5
Remark: 1. Test results including cable loss; 2. Measured number of hopping channels at difference Packet Type for each mode and recorded worst
case for each mode. 3. Worst case data at DH5 for GFSK, 2DH5 for /4-DQPSK, 3DH5 for 8-DPSK modulation type;

Page 17 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.5. Band Edges Measurements and Conducted Spurious Emissions Test

6.5.1 Limit
In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement. Attenuation below the general limits specified in Section 15.209(a) is not required.
6.5.2 Block Diagram of Test Setup

6.5.3 Test Procedure Conducted RF measurements of the transmitter output were made to confirm that the EUT antenna port conducted emissions meet the specified limit and to identify any spurious signals that require further investigation or measurements on the radiated emissions site. The transmitter output is connected to the spectrum analyzer. The resolution bandwidth is set to 100 KHz. The video bandwidth is set to 300 KHz. Measurements are made over the 30 MHz to 26.5GHz range with the transmitter set to the lowest, middle, and highest channels
6.5.4 Test Results of Conducted Spurious Emissions No non-compliance noted. Only record the worst test result in this report. The test data refer to the following page.
PASS Please refer to Appendix A.6 for Band Edges Measurements. Please refer to Appendix A.7 for Conducted Spurious Emission.
Remark: 1. Test results including cable loss; 2. Measured at difference Packet Type for each mode and recorded worst case for each mode. 3. Worst case data at DH5 for GFSK, 2DH5 for /4-DQPSK, 3DH5 for 8-DPSK modulation type;
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 18 of 36

FCC ID: 2BBA6-K75PRO

6.6. Restricted Band Emission Limit

Report No.: LCSA030323015EA

6.6.1. Standard Applicable
15.205 (a) Except as shown in paragraph (d) of this section, only spurious emissions are permitted in any of the frequency bands listed below:

MHz

GHz

0.090-0.110 \1\ 0.495-0.505 2.1735-2.1905 4.125-4.128 4.17725-4.17775 4.20725-4.20775 6.215-6.218 6.26775-6.26825 6.31175-6.31225 8.291-8.294 8.362-8.366 8.37625-8.38675 8.41425-8.41475 12.29-12.293. 12.51975-12.52025 12.57675-12.57725 13.36-13.41

16.42-16.423 16.69475-16.69525 16.80425-16.80475 25.5-25.67 37.5-38.25 73-74.6 74.8-75.2 108-121.94 123-138 149.9-150.05 156.52475-156.52525 156.7-156.9 162.0125-167.17 167.72-173.2 240-285 322-335.4

399.9-410 608-614 960-1240 1300-1427 1435-1626.5 1645.5-1646.5 1660-1710 1718.8-1722.2 2200-2300 2310-2390 2483.5-2500 2690-2900 3260-3267 3332-3339 3345.8-3358 3600-4400

4.5-5.15 5.35-5.46 7.25-7.75 8.025-8.5 9.0-9.2 9.3-9.5 10.6-12.7 13.25-13.4 14.47-14.5 15.35-16.2 17.7-21.4 22.01-23.12 23.6-24.0 31.2-31.8 36.43-36.5 (\2\)

\1\ Until February 1, 1999, this restricted band shall be 0.490-0.510 MHz.

\2\ Above 38.6

According to §15.247 (d): 20dBc in any 100 kHz bandwidth outside the operating frequency band. In case the emission fall within the restricted band specified on 15.205(a), then the 15.209(a) limit in the table below has to be followed.

Frequencies (MHz)
0.009~0.490 0.490~1.705 1.705~30.0
30~88 88~216 216~960 Above 960

Field Strength (microvolts/meter)
2400/F(KHz) 24000/F(KHz)
30 100 150 200 500

Measurement Distance (meters) 300 30 30 3 3 3 3

6.6.2. Measuring Instruments and Setting
Please refer to of equipment list in this report. The following table is the setting of spectrum analyzer and receiver.

Page 19 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Spectrum Parameter Attenuation Start Frequency Stop Frequency RB / VB (Emission in restricted band) RB / VB (Emission in non-restricted band)

Setting Auto 1000 MHz 10th carrier harmonic 1MHz / 1MHz for Peak, 1 MHz / 1/T kHz for Average 1MHz / 1MHz for Peak, 1 MHz / 1/T kHz for Average

Receiver Parameter Attenuation Start ~ Stop Frequency Start ~ Stop Frequency Start ~ Stop Frequency

Setting Auto 9kHz~150kHz / RB/VB 200Hz/1KHz for QP/AVG 150kHz~30MHz / RB/VB 9kHz/30KHz for QP/AVG 30MHz~1000MHz / RB/VB 120kHz/1MHz for QP

6.6.3. Test Procedures
1) Sequence of testing 9 kHz to 30 MHz
Setup: --- The equipment was set up to simulate a typical usage like described in the user manual or described by manufacturer. --- If the EUT is a tabletop system, a rotatable table with 0.8 m height is used. --- If the EUT is a floor standing device, it is placed on the ground. --- Auxiliary equipment and cables were positioned to simulate normal operation conditions. --- The AC power port of the EUT (if available) is connected to a power outlet below the turntable. --- The measurement distance is 3 meter. --- The EUT was set into operation.
Premeasurement: --- The turntable rotates from 0°to 315°using 45°steps. --- The antenna height is 1.0 meter. --- At each turntable position the analyzer sweeps with peak detection to find the maximum of all emissions
Final measurement: --- Identified emissions during the premeasurement the software maximizes by rotating the turntable position (0°to 360°) and by rotating the elevation axes (0°to 360°). --- The final measurement will be done in the position (turntable and elevation) causing the highest emissions with QPK detector. --- The final levels, frequency, measuring time, bandwidth, turntable position, correction factor, margin to the limit and limit will be recorded. Also a plot with the graph of the premeasurement and the limit will be stored.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 20 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

2) Sequence of testing 30 MHz to 1 GHz
Setup: --- The equipment was set up to simulate a typical usage like described in the user manual or described by manufacturer. --- If the EUT is a tabletop system, a table with 0.8 m height is used, which is placed on the ground plane. --- If the EUT is a floor standing device, it is placed on the ground plane with insulation between both. --- Auxiliary equipment and cables were positioned to simulate normal operation conditions --- The AC power port of the EUT (if available) is connected to a power outlet below the turntable. --- The measurement distance is 3 meter. --- The EUT was set into operation.
Premeasurement: --- The turntable rotates from 0°to 315°using 45°steps. --- The antenna is polarized vertical and horizontal. --- The antenna height changes from 1 to 4 meter. --- At each turntable position, antenna polarization and height the analyzer sweeps three times in peak to find the maximum of all emissions.
Final measurement: --- The final measurement will be performed with minimum the six highest peaks. --- According to the maximum antenna and turntable positions of premeasurement the software maximize the peaks by changing turntable position (±45°) and antenna movement between 1 and 4 meter. --- The final measurement will be done with QP detector with an EMI receiver. --- The final levels, frequency, measuring time, bandwidth, antenna height, antenna polarization, turntable angle, correction factor, margin to the limit and limit will be recorded. Also a plot with the graph of the premeasurement with marked maximum final measurements and the limit will be stored.

Page 21 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

3) Sequence of testing 1 GHz to 18 GHz
Setup: --- The equipment was set up to simulate a typical usage like described in the user manual or described by manufacturer. --- If the EUT is a tabletop system, a rotatable table with 1.5 m height is used. --- If the EUT is a floor standing device, it is placed on the ground plane with insulation between both. --- Auxiliary equipment and cables were positioned to simulate normal operation conditions --- The AC power port of the EUT (if available) is connected to a power outlet below the turntable. --- The measurement distance is 3 meter. --- The EUT was set into operation.
Premeasurement: --- The turntable rotates from 0°to 315°using 45°steps. --- The antenna is polarized vertical and horizontal. --- The antenna height scan range is 1 meter to 4 meter. --- At each turntable position and antenna polarization the analyzer sweeps with peak detection to find the maximum of all emissions.
Final measurement: --- The final measurement will be performed with minimum the six highest peaks. --- According to the maximum antenna and turntable positions of premeasurement the software maximize the peaks by changing turntable position (±45°) and antenna movement between 1 and 4 meter. This procedure is repeated for both antenna polarizations. --- The final measurement will be done in the position (turntable, EUT-table and antenna polarization) causing the highest emissions with Peak and Average detector. --- The final levels, frequency, measuring time, bandwidth, turntable position, EUT-table position, antenna polarization, correction factor, margin to the limit and limit will be recorded. Also a plot with the graph of the premeasurement with marked maximum final measurements and the limit will be stored.

Page 22 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

4) Sequence of testing above 18 GHz
Setup: --- The equipment was set up to simulate a typical usage like described in the user manual or described by manufacturer. --- If the EUT is a tabletop system, a rotatable table with 1.5 m height is used. --- If the EUT is a floor standing device, it is placed on the ground plane with insulation between both. --- Auxiliary equipment and cables were positioned to simulate normal operation conditions --- The AC power port of the EUT (if available) is connected to a power outlet below the turntable. --- The measurement distance is 1 meter. --- The EUT was set into operation.
Premeasurement: --- The antenna is moved spherical over the EUT in different polarizations of the antenna.
Final measurement: --- The final measurement will be performed at the position and antenna orientation for all detected emissions that were found during the premeasurements with Peak and Average detector. --- The final levels, frequency, measuring time, bandwidth, correction factor, margin to the limit and limit will be recorded. Also a plot with the graph of the premeasurement and the limit will be stored.

Page 23 of 36 6.6.4. Test Setup Layout

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Above 10 GHz shall be extrapolated to the specified distance using an extrapolation factor of 20 dB/decade form 3m to 1.5m.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 24 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.6.5. EUT Operation during Test The EUT was programmed to be in continuously transmitting mode.

6.6.6. Results of Radiated Emissions (9 KHz~30MHz)

Temperature Test Engineer
Freq. (MHz)
-

23.8 Joker Hu

Humidity Configurations

Level (dBuV)
-

Over Limit (dB)
-

Over Limit (dBuV)
-

52.1% BT
Remark See Note

Note:
The amplitude of spurious emissions which are attenuated by more than 20 dB below the permissible value has no need to be reported.
Distance extrapolation factor = 40 log (specific distance / test distance) (dB); Limit line = specific limits (dBuV) + distance extrapolation factor.

6.6.7. Results of Radiated Emissions (30 MHz~1000 MHz)

Temperature Test Engineer

23.8 Joker Hu

PASS. The test data please refer to following page.

Humidity Configurations

52.1% BT

Horizontal

Page 25 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Vertical

Page 26 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Note: 1). Pre-scan all modes and recorded the worst case results in this report (3Mbps-High Channel). 2). Emission level (dBuV/m) = 20 log Emission level (uV/m). 3). Level = Reading + Factor, Margin = Level Limit, Factor = Antenna Factor + Cable Loss - Preamp Factor
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 27 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.6.8. Results of Radiated Emissions (1 GHz~26 GHz) Note: All the modes have been tested and recorded worst mode in the report.

The worst test result for GFSK, Channel 0 / 2402 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measured dBuv/m

4804.00 54.19 33.06 35.04 3.94

56.15

4804.00 43.74 33.06 35.04 3.94

45.70

4804.00 57.10 33.06 35.04 3.94

59.06

4804.00 43.60 33.06 35.04 3.94

45.56

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-17.85 -8.30 -14.94 -8.44

Remark

Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for GFSK, Channel 39 / 2441 MHz

Freq. MHz

Reading Ant. Fac

dBuv

dB/m

Pre. Fac. dB

Cab. Loss dB

Measure d
dBuv/m

4882.00 55.85 33.16 35.15 3.96 57.82

4882.00 42.69 33.16 35.15 3.96 44.66

4882.00 61.03 33.16 35.15 3.96 63.00

4882.00 45.39 33.16 35.15 3.96 47.36

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-16.18 -9.34 -11.00 -6.64

Remark

Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for GFSK, Channel 78 / 2480 MHz

Freq. MHz

Readin g
dBuv

Ant. Fac dB/m

Pre. Cab. Fac. Loss dB dB

Measured dBuv/m

4960.00 60.68 33.26 35.14 3.98

62.78

4960.00 44.64 33.26 35.14 3.98

46.74

4960.00 53.92 33.26 35.14 3.98

56.02

4960.00 45.71 33.26 35.14 3.98

47.81

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-11.22 -7.26 -17.98 -6.19

Remark
Peak Average
Peak Average

Pol.
Horizontal Horizontal
Vertical Vertical

The worst test result for /4-DQPSK, Channel 0 / 2402 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measur ed
dBuv/m

Limit dBuv/m

4804.00 55.52 33.06 35.04 3.94 57.48 74.00

4804.00 42.46 33.06 35.04 3.94 44.42 54.00

4804.00 58.24 33.06 35.04 3.94 60.20 74.00

4804.00 43.43 33.06 35.04 3.94 45.39 54.00

Margin dB
-16.52 -9.58 -13.80 -8.61

Remark

Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for /4-DQPSK, Channel 39 / 2441 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measur ed
dBuv/m

Limit dBuv/m

4882.00 56.44 33.16 35.15 3.96 58.41 74.00

4882.00 44.00 33.16 35.15 3.96 45.97 54.00

4882.00 61.20 33.16 35.15 3.96 63.17 74.00

4882.00 45.25 33.16 35.15 3.96 47.22 54.00

Margin dB
-15.59 -8.03 -10.83 -6.78

Remark

Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for /4-DQPSK, Channel 78 / 2480 MHz

Freq. MHz

Readin g
dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measur ed
dBuv/m

Limit dBuv/m

4960.00 60.43 33.26 35.14 3.98 62.53 74.00

4960.00 44.70 33.26 35.14 3.98 46.80 54.00

4960.00 53.05 33.26 35.14 3.98 55.15 74.00

4960.00 45.24 33.26 35.14 3.98 47.34 54.00

Margin dB
-11.47 -7.20 -18.85 -6.66

Remark

Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

Page 28 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

The worst test result for 8-DPSK, Channel 0 / 2402 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measured dBuv/m

4804.00 55.87 33.06 35.04 3.94 57.83

4804.00 43.81 33.06 35.04 3.94 45.77

4804.00 56.72 33.06 35.04 3.94 58.68

4804.00 42.90 33.06 35.04 3.94 44.86

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-16.17 -8.23 -15.32 -9.14

Remark Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for 8-DPSK, Channel 39 / 2441 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measured dBuv/m

4882.00 55.06 33.16 35.15 3.96 57.03

4882.00 43.33 33.16 35.15 3.96 45.30

4882.00 61.25 33.16 35.15 3.96 63.22

4882.00 45.01 33.16 35.15 3.96 46.98

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-16.97 -8.70 -10.78 -7.02

Remark Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

The worst test result for 8-DPSK, Channel 78 / 2480 MHz

Freq. MHz

Reading dBuv

Ant. Fac dB/m

Pre. Fac. dB

Cab. Loss dB

Measured dBuv/m

4960.00 60.08 33.26 35.14 3.98 62.18

4960.00 44.92 33.26 35.14 3.98 47.02

4960.00 54.00 33.26 35.14 3.98 56.10

4960.00 45.63 33.26 35.14 3.98 47.73

Limit dBuv/m
74.00 54.00 74.00 54.00

Margin dB
-11.82 -6.98 -17.90 -6.27

Remark Pol.

Peak Average
Peak Average

Horizontal Horizontal
Vertical Vertical

Notes: 1). Measuring frequencies from 9 KHz~10th harmonic or 26.5GHz (which is less), at least have 20dB margin found between lowest internal used/generated frequency to 30MHz.

2). Radiated emissions measured in frequency range from 9 KHz~10th harmonic or 26.5GHz (which is less) were made with an instrument using Peak detector mode.

3). Data of measurement within this frequency range shown " --- " in the table above means the reading of emissions are attenuated more than 20dB below the permissible limits or the field strength is too small to be measured.
4). Measured Level = Reading Level + Factor, Margin = Measured Level Limit, Factor = Antenna Factor + Cable Loss - Preamp Factor

Page 29 of 36

FCC ID: 2BBA6-K75PRO

6.7. AC Power Line Conducted Emissions

Report No.: LCSA030323015EA

6.7.1 Standard Applicable
According to §15.207 (a): For an intentional radiator which is designed to be connected to the public utility (AC) power line, the radio frequency voltage that is conducted back onto the AC power line on any frequency or frequencies within the band 150 kHz to 30 MHz shall not exceed 250 microvolts (The limit decreases linearly with the logarithm of the frequency in the range 0.15 MHz to 0.50 MHz). The limits at specific frequency range is listed as follows:

Frequency Range (MHz)
0.15 to 0.50 0.50 to 5 5 to 30

Quasi-peak 66 to 56 56 60

Limits (dBV)

Average 56 to 46
46 50

* Decreasing linearly with the logarithm of the frequency

6.7.2 Block Diagram of Test Setup

Vert. reference plane

EMI receiver

EUT

LISN

Reference ground plane

6.7.3 Test Results
Temperature Test Engineer

23.5 Joker Hu

PASS. The test data please refer to following page.

Humidity Configurations

53.6% BT

Line

Page 30 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

Neutral

Page 31 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

***Note: Pre-scan all modes and recorded the worst case results in this report (3Mbps-High Channel). Measurement = Reading + Correct Factor, Margin = Measurement Limit, Correct Factor=Lisn Factor+Cable Factor.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 32 of 36

FCC ID: 2BBA6-K75PRO

6.8. Emissions in Restricted Bands

Report No.: LCSA030323015EA

6.8.1 Standard Applicable
In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in §15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in §15.205(a), must also comply with the radiated emission limits specified in §15.209(a) (see §15.205(c)).
6.8.2. Test Setup Layout

6.8.3. Measuring Instruments and Setting
Please refer to equipment list in this report. The following table is the setting of Spectrum Analyzer.
6.8.4. Test Procedures
According to KDB 412172 section 1.1 Field Strength Approach (linear terms): eirp = pt x gt = (E x d)2/30 Where: pt = transmitter output power in watts, gt = numeric gain of the transmitting antenna (unitless), E = electric field strength in V/m, d = measurement distance in meters (m). erp = eirp/1.64 = (E x d)2/(30 x 1.64) Where all terms are as previously defined.
1. Check the calibration of the measuring instrument using either an internal calibrator or a known signal from an external generator.
2. Remove the antenna from the EUT and then connect to a low loss RF cable from the antenna port to a EMI test receiver, then turn on the EUT and make it operate in transmitting mode. Then set it to Middle Channel and High Channel within its operating range, and make sure the instrument is operated in its linear range.
3. Set both RBW and VBW of spectrum analyzer to 100 kHz with a convenient frequency span including 100kHz bandwidth from band edge, for Radiated emissions restricted band RBW=1MHz, VBW=3MHz for peak detector and RBW=1MHz, VBW=1/T for AV detector.
4. Measure the highest amplitude appearing on spectral display and set it as a reference level. Plot the graph with marking the highest point and edge frequency.
5. Repeat above procedures until all measured frequencies were complete.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 33 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6. Measure the conducted output power (in dBm) using the detector specified by the appropriate regulatory agency for guidance regarding measurement procedures for determining quasi-peak, peak, and average conducted output power, respectively).
7. Add the maximum transmit antenna gain (in dBi) to the measured output power level to determine the EIRP level (see 12.2.5 for guidance on determining the applicable antenna gain)
8. Add the appropriate maximum ground reflection factor to the EIRP level (6 dB for frequencies 30 MHz, 4.7 dB for frequencies between 30 MHz and 1000 MHz, inclusive and 0 dB for frequencies > 1000 MHz).
9. For devices with multiple antenna-ports, measure the power of each individual chain and sum the EIRP of all chains in linear terms (e.g., Watts, mW).
10. Compare the resultant electric field strength level to the applicable regulatory limit. 11. Perform radiated spurious emission test duress until all measured frequencies were complete.

6.8.5. Test Results

PASS
Please refer to Appendix A.8
Remark: 1. Measured at difference Packet Type for each mode and recorded worst case for each mode. 2. Worst case data at DH5 for GFSK, 2DH5 for /4-DQPSK, 3DH5 for 8-DPSK modulation type; 3. Measured at Hopping and Non-Hopping mode, recorded worst at Non-Hopping mode. 4. The other emission levels were very low against the limit. 5. The average measurement was not performed when the peak measured data under the limit of average
detection. 6. Detector AV is setting spectrum/receiver. RBW=1MHz/VBW=1/T/Sweep time=Auto/Detector=Peak; 7. Since the out-of-band characteristics of the EUT transmit antenna will often be unknown, the use of a
conservative antenna gain value is necessary. Thus, when determining the EIRP based on the measured conducted power, the upper bound on antenna gain for a device with a single RF output shall be selected as the maximum in-band gain of the antenna across all operating bands, or 2 dBi, whichever is greater. However, for devices that operate in multiple frequency bands while using the same transmit antenna, the highest gain of the antenna within the operating band nearest in frequency to the restricted band emission being measured may be used in lieu of the overall highest gain when the emission is at a frequency that is within 20 percent of the nearest band edge frequency, but in no case shall a value less than 2 dBi be used.

Page 34 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.9. Pseudorandom Frequency Hopping Sequence

6.9.1 Standard Applicable
For 47 CFR Part 15C sections 15.247 (a) (1) requirement:
Frequency hopping systems shall have hopping channel carrier frequencies separated by a minimum of 25 kHz or the 20 dB bandwidth of the hop-ping channel, whichever is greater. Alternatively, frequency hopping systems operating in the 24002483.5 MHz band may have hopping channel carrier frequencies that are separated by 25 kHz or two-thirds of the 20 dB bandwidth of the hopping channel, whichever is greater, provided the systems operate with an output power no greater than 125 mW. The system shall hop to channel frequencies that are selected at the system hopping rate from a pseudo randomly ordered list of hopping frequencies. Each frequency must be used equally on the average by each transmitter. The system receivers shall have input bandwidths that match the hop-ping channel bandwidths of their corresponding transmitters and shall shift frequencies in synchronization with the transmitted signals.
6.9.2 EUT Pseudorandom Frequency Hopping Sequence Requirement
The pseudorandom frequency hopping sequence may be generated in a nice-stage shift register whose 5th first stage. The sequence begins with the first one of 9 consecutive ones, for example: the shift register is initialized with nine ones. Number of shift register stages:9 Length of pseudo-random sequence:29-1=511 bits Longest sequence of zeros:8(non-inverted signal)

An example of pseudorandom frequency hopping sequence as follows:
Each frequency used equally one the average by each transmitter. The system receiver have input bandwidths that match the hopping channel bandwidths of their corresponding transmitter and shift frequencies in synchronization with the transmitted signals.
Shenzhen LCS Compliance Testing Laboratory Ltd. Add: 101, 201 Bldg A & 301 Bldg C, Juji Industrial Park Yabianxueziwei, Shajing Street, Baoan District, Shenzhen, 518000, China Tel: +(86) 0755-82591330 | E-mail: [email protected] | Web: www.lcs-cert.com Scan code to check authenticity

Page 35 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

6.10. Antenna Requirement
6.10.1 Standard Applicable
According to antenna requirement of §15.203.
An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this Section. The manufacturer may design the unit so that a broken antenna can be re-placed by the user, but the use of a standard antenna jack or electrical connector is prohibited. This requirement does not apply to carrier current devices or to devices operated under the provisions of Sections 15.211, 15.213, 15.217, 15.219, or 15.221. Further, this requirement does not apply to intentional radiators that must be professionally installed, such as perimeter protection systems and some field disturbance sensors, or to other intentional radiators which, in accordance with Section 15.31(d), must be measured at the installation site. However, the installer shall be responsible for ensuring that the proper antenna is employed so that the limits in this Part are not exceeded.
And according to §15.247(4)(1), system operating in the 2400-2483.5MHz bands that are used exclusively for fixed, point-to-point operations may employ transmitting antennas with directional gain greater than 6dBi provided the maximum peak output power of the intentional radiator is reduced by 1 dB for every 3 dB that the directional gain of the antenna exceeds 6dBi.
6.10.2 Antenna Connected Construction
6.10.2.1. Standard Applicable
According to §15.203 & RSS-Gen, an intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device.
6.10.2.2. Antenna Connector Construction
The gains of antenna used for transmitting is 2.34dBi(Max.), and the antenna is PCB Antenna and no consideration of replacement. Please see EUT photo for details.
6.10.2.3. Results: Compliance.

Page 36 of 36

FCC ID: 2BBA6-K75PRO

Report No.: LCSA030323015EA

7. TEST SETUP PHOTOGRAPHS OF EUT
Please refer to separated files for Test Setup Photos of the EUT.
8. EXTERIOR PHOTOGRAPHS OF THE EUT
Please refer to separated files for External Photos of the EUT.
9. INTERIOR PHOTOGRAPHS OF THE EUT
Please refer to separated files for Internal Photos of the EUT.

----------------THE END OF TEST REPORT---------------

Related FCC IDs:

2BBA6-K75PRO - Kezhi(HuiZhou) Electronic Technology Co., Ltd. Mechanical keyboard [-K75PRO]

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