Intertek

Prepared and Checked by:

Signed on File: Leung Chun Ning, Peter, Assistant Engineer

Approved by:

Digitally signed by Herbert Wong

Wong Cheuk Ho, Herbert, Assistant Manager

Date: June 24, 2024

General Information

Amendment History

Summary of Test Result

The equipment under test is found to be complying with the following standards: FCC Part 15, October 1, 2022 Edition.

Notes:

1. The EUT uses a permanently attached antenna which, in accordance to section 15.203, is considered sufficient to comply with the pervisions of this section.
2. Pursuant to FCC part 15 Section 15.215(c), the 20 dB bandwidth of the emission was contained within the frequency band designated (mentioned as above) which the EUT operated. The effects, if any, from frequency sweeping, frequency hopping, other modulation techniques and frequency stability over excepted variations in temperature and supply voltage were considered.

1.0 General Description

1.1 Product Description

The Equipment Under Test (EUT) is a 2-in-1 wireless charger designed for table use. It is powered by 120VAC. The smartphone charge pad operates at a frequency range of 120kHz to 360kHz, while the earpod charge pad operates from 120kHz to 150kHz. The maximum wireless power transmission is 15W for the smartphone charge pad and 5W for the earpod charge pad.

Antenna Type: Internal, Integral

For electronic filing, the brief circuit description is saved with filename: descri.pdf.

1.2 Related Submittal(s) Grants

This is a single application for certification of a transmitter. The receiver for this transmitter is exempted from the Part 15 technical rules per 15.101(b).

1.3 Test Methodology

Both AC mains line-conducted and radiated emission measurements were performed according to the procedures in ANSI C63.10 (2013). All radiated measurements were performed in a 3m Chamber. Preliminary scans were conducted in the 3m Chamber to determine worst-case modes. Radiated tests were performed at an antenna to EUT distance of 3 meters, unless stated otherwise in the "Justification Section" of this Application.

1.4 Test Facility

The 3m Chamber and conducted measurement facility used for radiated data collection is located at Workshop No. 3, G/F., World-Wide Industrial Centre, 43-47 Shan Mei Street, Fo Tan, Sha Tin, N.T., Hong Kong SAR, China. This test facility and site measurement data have been placed on file with the FCC.

2.0 System Test Configuration

2.1 Justification

The system was configured for testing in a typical customer usage scenario, adhering to ANSI C63.10 (2013). The device was powered by 120VAC.

For maximizing emissions below 30 MHz, the EUT was rotated 360°, the loop antenna was placed 1 meter above the ground, and antenna polarization was changed. For emissions at and above 30 MHz, the EUT was rotated 360°, antenna height was varied from 1 to 4 meters above the ground plane, and antenna polarization was changed. These procedures were used to identify the data reported in Exhibit 3.0.

The rear of the unit was positioned flush with the rear of the table. The EUT was mounted on a plastic stand and placed on a wooden turntable to facilitate maximizing emissions across three orthogonal axes.

Testing was performed under various conditions: standby mode, charging the smartphone charge pad only, charging the earpod charge pad only, and charging with full load. Only the worst-case data is presented in this report.

2.2 EUT Exercising Software

No special software was used to exercise the device. Upon power-up, the unit transmits an RF signal continuously.

2.3 Special Accessories

No special accessories were required for compliance.

2.4 Measurement Uncertainty

Decision Rule for compliance: For FCC/IC standards, measured values must be within applicable limits without accounting for measurement uncertainty. For EN/IEC/HKTA/HKTC standards, conformity rules are applied directly, excepting EN/IEC 61000-3-2, EN/IEC 61000-3-3, HKTA1004, HKCA1008, HKTA1019, HKTA1020, HKTA1041, and HKTA1044.

Uncertainty and Compliance: Unless the standard mandates extending measured values by measurement uncertainty for compliance determination, all compliance decisions are based on the actual measured value.

2.5 Support Equipment List and Description

2.6 Remarks

The internal RF components of the listed models are identical, differing only in color, customer's code, and main plug. The HR2D was selected for testing. Models TS-24210 through TS-24220 represent customer codes (SKU numbers).

3.0 Emission Results

Data includes worst-case configurations yielding the highest emission levels. Sample calculations, configuration photographs, and emission data tables are provided.

3.1 Field Strength Calculation

Field strength is calculated by adding Antenna Factor and Cable Factor, and subtracting Amplifier Gain (if any) and Average Factor (optional) from the measured reading. The basic equation is: FS = RA + AF + CF - AG - AV, where FS is Field Strength (dBμV/m), RA is Receiver Amplitude (dBμV), AF is Antenna Factor (dB), CF is Cable Attenuation Factor (dB), AG is Amplifier Gain (dB), and AV is Average Factor (dB).

The data tables reflect preamplifier gain. An example calculation: FS = RR + LF, where RR = RA - AG - AV, and LF = CF + AF. For a receiver reading of 52.0 dBμV, with AF=7.4 dB, CF=1.6 dB, AG=29.0 dB, and AV=5.0 dB, the field strength is calculated as 27.0 dBμV/m (equivalent to 22.4 μV/m).

3.2 Radiated Emission Configuration Photograph

The worst-case radiated emission was found at 196.84 MHz. Configuration photographs are saved with filename: setup photos.pdf.

3.3 Radiated Emission Data

The following pages list significant emission frequencies, limits, and margins of compliance. Negative margins indicate emissions below the limit. Judgment: Passed by 7.6 dB.

3.4 Conducted Emission Configuration Photograph

The worst-case line-conducted emission was found at 3.237 MHz. Configuration photographs are saved with filename: setup photos.pdf.

3.5 Conducted Emission Data

The following pages present plots and data for significant emission frequencies, limits, and margins of compliance. Judgment: Pass by 0.4 dB.

Conducted Emission Plot Description (Standby Mode)

The conducted emission plot displays amplitude (dBuV) versus frequency (kHz/MHz). It shows peak (PK) and average (AV) traces against defined limits (red lines). The plot covers frequencies from 150 kHz to 30 MHz.

Conducted Emission Plot Description (Charging with Full Load)

Similar to the standby mode plot, this displays amplitude (dBuV) versus frequency (kHz/MHz) for the charging with full load condition, showing peak and average traces against limits.

Conducted Emission Data Tables

Tables present detailed measurements for conducted emissions, including frequency, level (dBuV), and delta to limit (dB) for both Quasi Peak and CISPR Average detectors.

Radiated Emissions Data Tables

Tables present detailed measurements for radiated emissions, including frequency (MHz), read level (dBuV), MaxPeak (dBuV/m), Quasi-Peak (dBuV/m), limit (dBuV/m), margin (dB), height (cm), polarization (Pol), azimuth (deg), and correction factor (Corr. dB/m).

4.0 Equipment Photographs

Photographs are available for electronic filing under filenames: external photos.pdf and internal photos.pdf.

5.0 Product Labelling

FCC ID label artwork and location are available for electronic filing under filename: label.pdf.

6.0 Technical Specifications

The block diagram and schematic of the tested EUT are available for electronic filing under filenames: block.pdf and circuit.pdf.

7.0 Instruction Manual

A preliminary copy of the Instruction Manual is available for electronic filing under filename: manual.pdf. This manual will be provided to the end-user with each unit sold or leased in the United States.

8.0 Miscellaneous Information

8.1 Measured Bandwidth

Pursuant to FCC Part 15 Section 15.215(c), the 20dB bandwidth of the emission was contained within the designated frequency band. Effects of frequency sweeping, hopping, modulation techniques, and frequency stability under temperature and voltage variations were considered.

8.2 Emissions Test Procedures

Intertek Testing Services Hong Kong Ltd. followed procedures for transmitter measurements under Part 15, Subpart C rules.

Radiated Emission Test Procedures

The EUT was placed on a 4-foot diameter turntable, 0.8m above the ground plane for emissions at or below 1GHz, and 1.5m above the ground plane for emissions above 1GHz. The turntable was rotated, and cables were manipulated to find maximum emissions. The EUT was adjusted through three orthogonal axes. Antenna height was varied from one to four meters, and polarization was varied to find maximum signal levels.

Detector function for radiated emissions was peak mode. Average readings were taken by measuring the duty cycle and subtracting it from peak readings. The frequency range scanned was from 9 kHz to the tenth harmonic of the highest fundamental frequency or 40 GHz, whichever is lower. For line conducted emissions, the range was 150 kHz to 30 MHz.

The EUT was warmed up for 15 minutes. AC power was varied from 85% to 115% of nominal. Conducted measurements followed ANSI C63.10 (2013).

IF bandwidth was 100 kHz or greater below 1000 MHz. Above 1000 MHz, a resolution bandwidth of 1 MHz was used. Transmitter measurements were normally conducted at 3 meters, but signals were acquired at 1 meter or less to ensure a low noise floor in forbidden bands and above 1 GHz, with extrapolation to 3 meters using inverse scaling.

Radiated Emission Test Setup Descriptions:

Test setup of radiated emissions up to 30MHz: The setup involves a 3m Chamber with a ground plane. The EUT is placed on a turntable 0.8m high. A loop antenna is positioned 1.0m above the ground plane. An RF Test Receiver is used.

Test setup of radiated emissions above 1GHz: The setup is within a 3m Chamber with a ground plane. The EUT is on a turntable 0.8m high. An antenna tower supports the receiver antenna, with antenna height adjustable from 1.0m to 4.0m. An RF Test Receiver is used.

Conducted Emission Test Procedures

For tabletop equipment, the EUT and peripherals were placed on a 1.0m(W)×1.5m(L) table, 0.8m high. For floor-standing equipment, insulation from the ground plane was up to 12 mm. The EUT was positioned 0.4 meter from a vertical reference plane. Power connection was made through a line impedance stabilization network (LISN) providing 50 ohm coupling impedance. The chassis ground was bonded to the horizontal ground plane of the shielded room. Excess power cable between the EUT and LISN was bundled. Connecting cables were moved to find maximum emissions.

Conducted Emission Test Setup Diagram:

A block diagram shows the setup: AC Power connects to LISN 1, which connects to the EUT and Peripherals. These connect to LISN 2, which connects to an EMI Receiver, which is powered by AC Power.

8.3 Occupied Bandwidth

Occupied Bandwidth Test Setup Diagram:

A block diagram shows the setup: A Spectrum Analyzer connects to the EUT, which is powered by a Power supply or Battery.

Occupied Bandwidth Results:

Standby Mode:

Charging with Full Load:

The worst-case results are shown in the plots for Smartphone Charge Pad and Earpod Charge Pad.

9.0 Confidentiality Request

A preliminary copy of the confidentiality request is available for electronic filing with filename: request.pdf.

10.0 Equipment List

1) Radiated Emissions Test

2) Conducted Emissions Test

3) OBW Measurement

4) Control Software for Radiated Emission