Qingdao Richriver Electrics Co., Ltd. FCC Class II Permissive Change Report

Applicant, Manufacturer, FCC ID

Applicant: Intertek Testing Services Shanghai

Manufacturer: Qingdao Richriver Electrics Co., Ltd.

FCC ID: 2AJJGHJC0

Summary

The equipment complies with the requirements according to the following standard(s) or Specification:

• 47CFR Part 15 (2017): Radio Frequency Devices (Subpart C)
• ANSI C63.10 (2013): American National Standard of Procedures for Compliance Testing of Unlicensed Wireless Devices
• RSS-210 Issue 9 (August 2016): Licence-exempt Radio Apparatus (All Frequency Bands): Category I Equipment
• RSS-Gen Issue 5 (April 2018): General Requirements for Compliance of Radio Apparatus

Prepared by: Nemo Li (Project Engineer)

Reviewed by: Daniel Zhao (Reviewer)

This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by the use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program.

Revision History

Measurement Result Summary

Notes: 1: NA = Not Applicable. 2: Determination of the test conclusion is based on IEC Guide 115 in consideration of measurement uncertainty. 3: Additions, Deviations and Exclusions from Standards: None. 4: This report is for the exclusive use of Intertek's Client and is provided pursuant to the agreement between Intertek and its Client. Intertek's responsibility and liability are limited to the terms and conditions of the agreement. Intertek assumes no liability to any party, other than to the Client in accordance with the agreement, for any loss, expense or damage occasioned by use of this report. Only the Client is authorized to permit copying or distribution of this report and then only in its entirety. Any use of the Intertek name or one of its marks for the sale or advertisement of the tested material, product or service must first be approved in writing by Intertek. The observations and test results in this report are relevant only to the sample tested. This report by itself does not imply that the material, product, or service is or has ever been under an Intertek certification program.

General Information

1.1 Description of Equipment Under Test (EUT)

1.2 Technical Specification

Host models: HJH55E, HJH173

1.3 Description of Test Facility

The test facility is recognized, certified, or accredited by these organizations:

• CNAS Accreditation Lab, Registration No. CNAS L0139
• FCC Accredited Lab, Designation Number: CN1175
• IC Registration Lab, Registration code No.: 2042B-1
• VCCI Registration Lab, Registration No.: R-4243, G-845, C-4723, T-2252
• NVLAP Accreditation Lab, NVLAP LAB CODE: 200849-0
• A2LA Accreditation Lab, Certificate Number: 3309.02

Test Specifications

2.1 Standards or Specification

• 47CFR Part 15 (2017)
• ANSI C63.10 (2013)
• RSS-210 Issue 9 (August 2016)
• RSS-Gen Issue 5 (April 2018)

2.2 Mode of operation during the test

The host devices are handhold devices, so three axes (X, Y, Z) were observed while the test receiver worked as "max hold" continuously and the highest reading among the whole test procedure was recorded.

The lowest, middle and highest channel were tested as representatives.

2.3 Test software list

2.4 Test peripherals list

2.5 Test environment condition:

2.6 Instrument list

A summary of the instruments used for testing:

Conducted Emission Instruments

• Test Receiver (R&S ESCS 30)
• A.M.N. (R&S ESH2-Z5)
• Shielded room

Radiated Emission Instruments

• Test Receiver (R&S ESIB 26)
• Bilog Antenna (TESEQ CBL 6112D)
• Pre-amplifier (R&S AFS42-001018 00-25-S-42)
• Horn antenna (ETS HF 906)
• Horn antenna (ETS 3117)
• Horn antenna (Albatross project HAP18-26W)
• Semi-anechoic chamber

RF Test Instruments

• PXA Signal Analyzer (Keysight N9030A)
• Power sensor (Agilent U2021XA)
• Vector Signal Generator (Agilent N5182B)
• Spectrum analyzer (R&S CMW500)
• MXG Analog Signal Generator (Agilent N5181A)
• Mobile Test System (Litepoint Iqxel)
• Test Receiver (R&S ESCI 7)

Additional Instruments

• Therom-Hygrograph (ZJ1-2A)
• Pressure meter (YM3)

2.7 Measurement uncertainty

Radiated Emission

Test result: Pass

3.1 Limit

Fundamental and Harmonic Limits

The radiated emissions which fall in the restricted bands, must also comply with the radiated emission limits:

3.2 Measurement Procedure

For Radiated emission below 30MHz:

1. The EUT was placed on the top of a rotating table 0.8 meters above the ground at a 3 meter chamber room. The table was rotated 360 degrees to determine the position of the highest radiation.
2. The EUT was set 3 meters away from the interference-receiving antenna, which was mounted on the top of a variable-height antenna tower.
3. Both X and Y axes of the antenna are set to make the measurement.
4. For each suspected emission, the EUT was arranged to its worst case and the rotatable table was turned from 0 degrees to 360 degrees to find the maximum reading.
5. The test-receiver system was set to Quasi-Peak Detect Function and Specified Bandwidth with Maximum Hold Mode.

NOTE: The resolution bandwidth and video bandwidth of test receiver/spectrum analyzer is 9kHz at frequency below 30MHz.

For Radiated emission above 30MHz:

1. The EUT was placed on the top of a rotating table 0.8 meters (for 30MHz ~ 1GHz) / 1.5 meters (for above 1GHz) above the ground at 3 meter chamber room for test. The table was rotated 360 degrees to determine the position of the highest radiation.
2. The EUT was set 3 meters away from the interference-receiving antenna, which was mounted on the top of a variable-height antenna tower.
3. The height of antenna is varied from one meter to four meters above the ground to determine the maximum value of the field strength. Both horizontal and vertical polarizations of the antenna are set to make the measurement.
4. For each suspected emission, the EUT was arranged to its worst case and then the antenna was tuned to heights from 1 meter to 4 meters and the rotatable table was turned from 0 degrees to 360 degrees to find the maximum reading.
5. The test-receiver system was set to quasi-peak detect function and specified bandwidth with maximum hold mode when the test frequency is below 1 GHz.
6. The test-receiver system was set to peak and average detect function and specified bandwidth with maximum hold mode when the test frequency is above 1 GHz. If the peak reading value also meets average limit, measurement with the average detector is unnecessary.

Note:

1. The resolution bandwidth and video bandwidth of test receiver/spectrum analyzer is 120kHz for Quasi-peak detection (QP) at frequency below 1GHz.
2. The resolution bandwidth of test receiver/spectrum analyzer is 1 MHz and the video bandwidth is 3 MHz for Peak detection (PK) at frequency above 1GHz.
3. The resolution bandwidth of test receiver/spectrum analyzer is 1 MHz and the video bandwidth is 1/T (Duty cycle < 98%) or 3 x RBW (Duty cycle ≥ 98%) for Average detection (AV) at frequency above 1GHz.
4. All modes of operation were investigated and the worst-case emissions are reported.

3.3 Test Configuration

Radiated emission below 30MHz:

Diagram description: The setup includes the EUT and Support Units placed on a 0.8m high rotating table, 3 meters away from a Test Receiver. The turntable rotates 360 degrees.

Radiated emission 30MHz to 1GHz:

Diagram description: The setup includes the EUT and Support Units placed on a 0.8m high rotating table, 3 meters away from an Antenna Tower (1-4m variable height). A Test Receiver is used for measurement. The turntable rotates 360 degrees.

Radiated emission above 1GHz:

Diagram description: The setup includes the EUT and Support Units placed on a 1.5m high rotating table, 3 meters away from an Antenna Tower (1-4m variable height) and an absorber. A Test Receiver is used for measurement. The turntable rotates 360 degrees.

3.4 Test Results of Radiated Emissions

The low frequency, which started from 9 kHz to 30MHz, was pre-scanned and the result which was 20dB lower than the limit line per 15.31(o) was not reported.

Test data below 1GHz:

HJH55E:

HJH173:

Test result above 1GHz:

HJH55E:

HJH173:

Remark: 1. Correct Factor = Antenna Factor + Cable Loss (+ Amplifier, for higher than 1GHz), the value was added to Original Receiver Reading by the software automatically. 2. Corrected Reading = Original Receiver Reading + Correct Factor. 3. Margin = Limit - Corrected Reading. 4. If the PK Corrected Reading is lower than AV limit, the AV test can be elided.

Example: Assuming Antenna Factor = 30.20dB/m, Cable Loss = 2.00dB, Gain of Preamplifier = 32.00dB, Original Receiver Reading = 10.00dBuV, Limit = 40.00dBuV/m. Then Correct Factor = 30.20 + 2.00 - 32.00 = 0.20dB/m; Corrected Reading = 10dBuV + 0.20dB/m = 10.20dBuV/m; Margin = 40.00dBuV/m - 10.20dBuV/m = 29.80dB.