Intertek Test Report

General Information

Grantee: Twelve South, LLC

Grantee Address: 1503 KING ST STE201 Charleston, SC29405, USA.

Contact Person: Kelly Witte

Tel: +1215-378-4436

E-mail: kelly@twelvesouth.com

Manufacturer: Twelve South, LLC

Manufacturer Address: 1503 KING ST STE201 Charleston, SC29405, USA.

Brand Name: twelve south

Model: HR3D

SKU Number: TS-2421, TS-2422, TS-2423, TS-2424, TS-2425, TS-2426, TS-2427, TS-2428, TS-2429

Type of EUT: Wireless Power Transfer Device - Transmitter

Description of EUT: HiRise 3 Deluxe

Serial Number: Not Labelled

FCC ID: 2AREB-HR3D

Date of Sample Submitted: June 17, 2024

Date of Test: June 17, 2024 to June 19, 2024

Report No.: 24051013HKG-001R1

Report Date: June 24, 2024

Environmental Conditions: Temperature: +10 to 40°C, Humidity: 10 to 90%

Conclusion: Test was conducted by client submitted sample. The submitted sample as received complied with the 47 CFR Part 15 Certification.

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 3-in-1 wireless charger that is designed to work on table. The EUT is powered by 120VAC, the smartphone charge pad is operated at frequency range of 127kHz to 360kHz, the earpod charge pad is operated at frequency range of 112kHz to 160kHz while the smartwatch charge pad is operated at frequency range of 320kHz to 330kHz. The maximum wireless power transmission for smartphone charge pad is 15W, the maximum wireless power transmission for earpod charge pad is 5W while that for smartwatch charge pad is 5W.

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 an 3m Chamber. Preliminary scans were performed in the 3m Chamber only to determine worst case modes. All 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 to collect the radiated data 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 fashion (as a customer would normally use it), and in the confines as outlined in ANSI C63.10 (2013).

The device was powered by 120VAC.

For maximizing emissions below 30 MHz, the EUT was rotated through 360°, the centre of the loop antenna was placed 1 meter above the ground, and the antenna polarization was changed. For maximizing emission at and above 30 MHz, the EUT was rotated through 360°, the antenna height was varied from 1 meter to 4 meters above the ground plane, and the antenna polarization was changed. This step by step procedure for maximizing emissions led to the data report in Exhibit 3.0.

The rear of unit shall be flushed with the rear of the table.

The equipment under test (EUT) was configured for testing in a typical fashion (as a customer would normally use it). The EUT was mounted to a plastic stand if necessary and placed on the wooden turntable, which enabled the engineer to maximize emissions through its placement in the three orthogonal axes.

There are different testing conditions for this EUT, standby mode, charging with the smartphone charge pad only, charging with the earpod charge pad only, charging with the smartwatch charge pad only, charging with either 2 charge pads only and charging with full load. Only the worst-case data is shown in this report.

2.2 EUT Exercising Software

There was no special software to exercise the device. Once the unit is powered up, it transmits the RF Signal continuously.

2.3 Special Accessories

There are no special accessories necessary for compliance of this product.

2.4 Measurement Uncertainty

Decision Rule for compliance: For FCC/IC standard, the measured value must be within the limits of applicable standard without accounting for the measurement uncertainty. For EN/IEC/HKTA/HKTC standard, conformity rules will be used as per standard directly excepted EN/IEC 61000-3-2, EN/IEC 61000-3-3, HKTA1004, HKCA1008, HKTA1019, HKTA1020, HKTA1041 and HKTA1044.

Uncertainty and Compliance - Unless the standard specifically states that measured values are to be extended by the measurement uncertainty in determining compliance, all compliance determinations are based on the actual measured value.

2.5 Support Equipment List and Description

2.6 Remark

The internal RF components of the following models are identical, except for the color, customer's code, and main plug: HR3D was selected for testing; TS-2421, TS-2422, TS-2423, TS-2424, TS-2425, TS-2426, TS-2427, TS-2428 and TS-2429 are the customer's codes (SKU numbers).

3.0 Emission Results

Data is included of the worst case configuration (the configuration which resulted in the highest emission levels). A sample calculation, configuration photographs and data tables of the emissions are included.

3.1 Field Strength Calculation

The field strength is calculated by adding the Antenna Factor and Cable Factor, and subtracting the Amplifier Gain (if any), Average Factor (optional) from the measured reading. The basic equation with a sample calculation is as follows:

FS = RA + AF + CF - AG - AV

where FS = Field Strength in μV/m, RA = Receiver Amplitude (including preamplifier) in μV, AF = Antenna Factor in dB, CF = Cable Attenuation Factor in dB, AG = Amplifier Gain in dB, AV = Average Factor in dB

In the following table(s), the reading shown on the data table reflects the preamplifier gain. An example for the calculations in the following table is as follows:

FS = RR + LF

where FS = Field Strength in μV/m, RR = RA - AG - AV in μV, LF = CF + AF in dB

Assume a receiver reading of 52.0 μV is obtained. The antenna factor of 7.4 dB and cable factor of 1.6 dB are added. The amplifier gain of 29.0 dB and average factor of 5.0 dB are subtracted, giving a field strength of 27.0 μV/m. This value in μV/m was converted to its corresponding level in μV/m.

RA = 52.0 μV/m, AF = 7.4 dB, CF = 1.6 dB, AG = 29.0 dB, AV = 5.0 dB

FS = RR + LF

FS = 18 + 9 = 27 dBμV/m

Level in μV/m = Common Antilogarithm [(27 dBμV/m)/20] = 22.4 μV/m

3.2 Radiated Emission Configuration Photograph

The worst case in radiated emission was found at 77.408750 MHz. For electronic filing, the worst case radiated emission configuration photographs are saved with filename: setup photos.pdf.

3.3 Radiated Emission Data

The data on the following page lists the significant emission frequencies, the limit and the margin of compliance. Numbers with a minus sign are below the limit. Judgment: Passed by 7.5 dB

3.4 Conducted Emission Configuration Photograph

The worst case in line-conducted emission was found at 3.237 MHz. For electronic filing, the worst case line-conducted configuration photographs are saved with filename: setup photos.pdf.

3.5 Conducted Emission Data

The plot(s) and data in the following pages list the significant emission frequencies, the limit and the margin of compliance. Judgment: Pass by 0.2 dB

Conducted Emission

Model: HR3D

Date of Test: June 18, 2024

Worst-Case Operating Mode: Standby Mode

[Diagram Description: A spectrum analyzer plot showing conducted emissions. The X-axis is frequency from 150 kHz to 30 MHz. The Y-axis is amplitude in dBuV from 0 to 100. Two traces are shown, one peak (PK CLRWR) and one average (AV CLRWR), along with limit lines (SGL, TDS, 6DB, DC). The plot indicates RBW 9 kHz, VBW 3 kHz, Att 10 dB AUTO PREAMP OFF.]

Note: Measurement Uncertainty is ±4.2dB at a level of confidence of 95%.

Conducted Emission Data (Standby Mode)

Model: HR3D

Date of Test: June 18, 2024

Worst-Case Operating Mode: Charging with Full Load

[Diagram Description: A spectrum analyzer plot showing conducted emissions. The X-axis is frequency from 150 kHz to 30 MHz. The Y-axis is amplitude in dBuV from 0 to 100. Two traces are shown, one peak (PK CLRWR) and one average (AV CLRWR), along with limit lines (SGL, TDS, 6DB, DC). The plot indicates RBW 9 kHz, VBW 3 kHz, Att 10 dB AUTO PREAMP OFF.]

Note: Measurement Uncertainty is ±4.2dB at a level of confidence of 95%.

Conducted Emission Data (Charging with Full Load)

Radiated Emissions

Model: HR3D

Date of Test: June 18, 2024

Worst-Case Operating Mode: Standby Mode

Table 1: Pursuant to FCC Part 15 Section 15.209 Requirement

NOTES: 1. Peak and Quasi-Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meters. 3. Negative value in the margin column shows emission below limit. 4. Loop antenna is used for the emissions below 30MHz. 5. Emissions within the restricted band meets the requirement of FCC Part 15 Section 15.205. 6. Measurement Uncertainty is ±5.3dB at a level of confidence of 95%. 7. Corr. (dB/m) = Antenna Factor (dB) + Cable Loss (dB) Max Peak (dBμV/m) or Quasi-Peak (dBμV/m) = Corr. (dB/m) + Read Level (dBμV) Margin (dB) = Max Peak (dBμV/m) – Limit (dBμV/m) or Quasi-Peak (dBμV/m) – Limit (dBμV/m)

Table 2: Pursuant to FCC Part 15 Section 15.209 Requirement

NOTES: 1. Peak and Quasi-Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meters. 3. Negative value in the margin column shows emission below limit. 4. Loop antenna is used for the emissions below 30MHz. 5. Emissions within the restricted band meets the requirement of FCC Part 15 Section 15.205. 6. Measurement Uncertainty is ±5.3dB at a level of confidence of 95%. 7. Corr. (dB/m) = Antenna Factor (dB) + Cable Loss (dB) Max Peak (dBμV/m) or Quasi-Peak (dBμV/m) = Corr. (dB/m) + Read Level (dBμV) Margin (dB) = Max Peak (dBμV/m) – Limit (dBμV/m) or Quasi-Peak (dBμV/m) – Limit (dBμV/m)

Table 3: Pursuant to FCC Part 15 Section 15.209 Requirement

NOTES: 1. Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meters. 3. Negative value in the margin column shows emission below limit. 4. Loop antenna is used for the emissions below 30MHz. 5. Emissions within the restricted band meets the requirement of FCC Part 15 Section 15.205. 6. Measurement Uncertainty is ±5.3dB at a level of confidence of 95%. 7. Corr. (dB/m) = Antenna Factor (dB) + Cable Loss (dB) Max Peak (dBμV/m) or Quasi-Peak (dBμV/m) = Corr. (dB/m) + Read Level (dBμV) Margin (dB) = Max Peak (dBμV/m) – Limit (dBμV/m) or Quasi-Peak (dBμV/m) – Limit (dBμV/m)

Table 4: Pursuant to FCC Part 15 Section 15.209 Requirement

NOTES: 1. Peak and Quasi-Peak Detector Data unless otherwise stated. 2. All measurements were made at 3 meters. 3. Negative value in the margin column shows emission below limit. 4. Loop antenna is used for the emissions below 30MHz. 5. Emissions within the restricted band meets the requirement of FCC Part 15 Section 15.205. 6. Measurement Uncertainty is ±5.3dB at a level of confidence of 95%. 7. Corr. (dB/m) = Antenna Factor (dB) + Cable Loss (dB) Max Peak (dBμV/m) or Quasi-Peak (dBμV/m) = Corr. (dB/m) + Read Level (dBμV) Margin (dB) = Max Peak (dBμV/m) – Limit (dBμV/m) or Quasi-Peak (dBμV/m) – Limit (dBμV/m)

4.0 Equipment Photographs

For electronic filing, the photographs are saved with filename: external photos.pdf and internal photos.pdf.

5.0 Product Labelling

For electronics filing, the FCC ID label artwork and the label location are saved with filename: label.pdf.

6.0 Technical Specifications

For electronic filing, the block diagram and schematic of the tested EUT are saved with filename: block.pdf and circuit.pdf respectively.

7.0 Instruction Manual

For electronic filing, a preliminary copy of the Instruction Manual is saved with filename: manual.pdf. This manual will be provided to the end-user with each unit sold/leased in the United States.

8.0 Miscellaneous Information

The miscellaneous information includes details of the test procedure and measured bandwidth.

8.1 Measured Bandwidth

Pursuant to FCC Part 15 Section 15.215(c), the 20dB bandwidth of the emission was contained within the frequency band designed (mentioned as above) which the EUT operated. The effects, if any, from frequency sweeping, frequency hopping, other modulation techniques and frequency stability over expected variations in temperature and supply voltage were considered.

8.2 Emissions Test Procedures

The following is a description of the test procedure used by Intertek Testing Services Hong Kong Ltd. in the measurements of transmitter operating under the Part 15, Subpart C rules.

The transmitting equipment under test (EUT) is placed on a wooden turntable which is four feet in diameter and approximately 0.8m in height above the ground plane for emission measurement at or below 1GHz and 1.5m in height above the ground plane for emission measurement above 1GHz. During the radiated emissions test, the turntable is rotated and any cables leaving the EUT are manipulated to find the configuration resulting in maximum emissions. The EUT is adjusted through all three orthogonal axis to obtain maximum emission levels. The antenna height and polarization are also varied during the testing to search for maximum signal levels. The height of the antenna is varied from one to four meters.

Detector function for radiated emissions is in peak mode. Average readings, when required, are taken by measuring the duty cycle of the equipment under test and subtracting the corresponding amount in dB from the measured peak readings. A detailed description for the calculation of the average factor can be found in Exhibit 8.3.

The frequency range scanned is from the lowest radio frequency signal generated in the device which is greater than 9 kHz to the tenth harmonic of the highest fundamental frequency or 40 GHz, whichever is lower. For line conducted emissions, the range scanned is 150 kHz to 30 MHz.

The EUT is warmed up for 15 minutes prior to the test.

AC power to the unit is varied from 85% to 115% nominal and variation in the fundamental emission field strength is recorded. If battery powered, a new, fully charged battery is used.

Conducted measurements were made as described in ANSI C63.10 (2013).

The IF bandwidth used for measurement of radiated signal strength was 100 kHz or greater when frequency is below 1000 MHz. Where pulsed transmissions of short enough pulse duration warrant, a greater bandwidth is selected according to the recommendations of Hewlett Packard Application Note 150-2. A discussion of whether pulse desensitivity is applicable to this unit is included in this report (See Exhibit 8.1). Above 1000 MHz, a resolution bandwidth of 1 MHz is used.

Transmitter measurements are normally conducted at a measurement distance of three meters. However, to assure low enough noise floor in the forbidden bands and above 1 GHz, signals are acquired at a distance of one meter or less. All measurements are extrapolated to three meters using inverse scaling, unless otherwise reported. Measurements taken at a closer distance are so marked.

8.2.1 Radiated Emission Test Setup

[Diagram Description: The first diagram shows the test setup for radiated emissions up to 30MHz. It depicts an EUT on a turntable (0.8m height) within a 3m Chamber, 3 meters away from an antenna tower with a receiver antenna at 1.0m height. An RF Test Receiver is connected. The second diagram shows the test setup for radiated emissions above 1GHz. It is similar but the antenna height is varied from 1.0 to 4.0m.]

8.2.2 Conducted Emission Test Procedures

For tabletop equipment, the EUT along with its peripherals were placed on a 1.0m(W)×1.5m(L) and 0.8m in height wooden table. For floor-standing equipment, the EUT and all cables were insulated, if required, from the ground plane by up to 12 mm of insulating material. The EUT was adjusted to maintain a 0.4 meter space from a vertical reference plane. The EUT was connected to power mains through a line impedance stabilization network (LISN), which provided 50 ohm coupling impedance for measuring instrument and the chassis ground was bounded to the horizontal ground plane of shielded room. The excess power cable between the EUT and the LISN was bundled.

All connecting cables of EUT and peripherals were moved to find the maximum emission.

8.2.3 Conducted Emission Test Setup

[Diagram Description: A block diagram shows the conducted emission test setup. It illustrates AC Power connected to LISN 1, then to EUT, then to Peripherals, then to LISN 2, and finally back to AC Power. An EMI Receiver is also shown connected.]

8.3 Occupied Bandwidth

[Diagram Description: A block diagram shows the test setup for Occupied Bandwidth measurement, featuring a Spectrum Analyzer connected to the EUT, which is powered by a Power supply or Battery.]

Occupied Bandwidth Results: Standby Mode

The worst case is shown as below:

[Diagram Description: Three plots showing Occupied Bandwidth measurements for Smartphone Charge Pad, Earpod Charge Pad, and Smartwatch Charge Pad in Standby Mode. Each plot displays frequency spectrum with peak and average traces, reference levels, and markers indicating occupied bandwidth.]

Occupied Bandwidth Results: Charging with Full Load

The worst case is shown as below:

[Diagram Description: Three plots showing Occupied Bandwidth measurements for Smartphone Charge Pad, Earpod Charge Pad, and Smartwatch Charge Pad while Charging with Full Load. Each plot displays frequency spectrum with peak and average traces, reference levels, and markers indicating occupied bandwidth.]

9.0 Confidentiality Request

For electronic filing, a preliminary copy of the confidentiality request is saved 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

Software Information

END OF TEST REPORT