Intertek Test Report

1.0 Summary of Test Result

This report certifies that the sample of the equipment under test (EUT) complies with the requirements of FCC Part 15, Subpart C for Intentional Radiators, as per 47 CFR [10-1-23]. Key test specifications met include Transmitter Radiated Emission, Band Edge, Conducted Emission, and 20dB Bandwidth, all resulting in a 'Pass' status.

The EUT utilizes an Integral Antenna, deemed compliant with FCC Section 15.203.

2.0 General Description

The Equipment Under Test (EUT) is a Rear Surround Speaker operating in the 5.8GHz band (5729-5851MHz) using GFSK modulation. It is powered by AC 100-240V, 50/60Hz. The models R652, A652, AX5100QAU, and TS5100Q are hardware-identical to the AX5100Q, with model and brand name differences serving as marketing strategies.

Testing was performed according to ANSI C63.10 (2013) standards in Semi-anechoic chambers and shield rooms at Intertek Testing Services Shenzhen Ltd. Longhua Branch.

3.0 System Test Configuration

The system was configured for testing in a typical customer usage scenario. The EUT was powered by AC 120V, 60Hz. For radiated emission maximization, the EUT was rotated 360°, antenna height was varied from 1 to 4 meters, and polarization was changed. The EUT and transmitting antenna were centered on a turntable. No special EUT exercising software or accessories were used, and no modifications were made by the testing laboratory.

4.0 Emission Results

4.1 Radiated Test Results

Field strength calculations involve adding spectrum analyzer readings to antenna factors, cable loss, and subtracting amplifier gain, with adjustments for pulse desensitization and average factors. The formula used is FS = RA + AF + CF - AG + PD + AV.

Worst Case Radiated Emission: 161.726000 MHz. Judgement: Passed by 12.4 dB.

Horizontal Polarity Emissions:

Graph Description (Horizontal): The graph shows radiated emissions for horizontal polarity. The x-axis represents Frequency in Hz (from 30M to 1G), and the y-axis represents Level in dBuV/m. It includes plotted lines for Quasi Peak (QP) measurements and the FCC Part 15 Class B Electric Field Strength QP limit line.

Vertical Polarity Emissions:

Graph Description (Vertical): The graph illustrates radiated emissions for vertical polarity, with Frequency in Hz on the x-axis and Level in dBuV/m on the y-axis. It displays Quasi Peak (QP) measurements and the FCC Part 15 Class B Electric Field Strength QP limit line.

Transmitter Spurious Emissions (Radiated)

Worst Case Radiated Emission: 5851.000 MHz. Judgement: Passed by 2.6 dB.

Table 1 (5729 MHz):

Table 2 (5789 MHz):

Table 3 (5851 MHz):

Graph Descriptions for Spurious Emissions: The report includes graphs for Lowest and Highest frequency channels showing radiated emissions. The x-axis represents Frequency (MHz or GHz), and the y-axis represents Level in dBuV/m. These graphs illustrate the measured emissions against FCC Part 15 Class B Electric Field Strength Peak and Average limits.

4.2 Conducted Emission

Worst Case Conducted Configuration: 0.386000MHz. Judgement: Passed by 7.7dB margin.

Conducted Emissions (Live Phase):

Conducted Emissions (Neutral Phase):

Graph Description (Conducted Emissions): The graphs display conducted emissions for Live and Neutral phases. The x-axis shows Frequency in Hz (from 150k to 30M), and the y-axis shows Level in dBuV. They plot Quasi Peak (QP) and Average (AV) measurements against FCC Part 15 Class B Voltage on Mains QP and AV limits.

5.0 Equipment Photographs

Photographs of the tested EUT (external and internal) are available separately.

6.0 Product Labelling

FCC ID label artwork and location information are available separately.

7.0 Technical Specifications

Block diagrams and schematics of the EUT are available separately.

8.0 Instruction Manual

A preliminary copy of the Instruction Manual is available separately and will be provided with each unit sold/leased in the United States.

9.0 Miscellaneous Information

9.1 Band Edge Plot

The test plots confirm that field strength of emissions outside the specified frequency band is attenuated to general radiated emission limits (Section 15.209), fulfilling FCC 15.249(d) requirements.

Lower Channel (5729.000 MHz)

Upper Channel (5851.000 MHz)

The resultant field strengths meet the general radiated emission limits of 74dBμV/m (Peak) and 54dBμV/m (Average).

9.2 20dB Bandwidth

The 20dB bandwidth of the emission was measured and found to be contained within the designated frequency band, consistent with FCC Part 15 Section 15.215(c).

9.3 Discussion of Pulse Desensitization

Pulse desensitization is not applicable as the transmitter operates continuously.

9.4 Transmitter Duty Cycle Calculation

Duty cycle was not used for this device as the transmitter operates continuously.

9.5 Emissions Test Procedures

Tests were conducted following ANSI C63.10-2013. Radiated emissions were measured with the EUT on a turntable, varying antenna height and polarization to find maximum emissions. Detector function for radiated emissions was peak mode. Conducted emissions were measured from 150 kHz to 30 MHz using QP & AV modes with a 9 kHz IFBW.

10.0 Test Equipment List