TEST REPORT

Table of Contents

1. General Information
2. Summary of Test Results
3. Antenna Requirement
4. Power Spectral Density
5. DTS Bandwidth
6. RF Output Power
7. Field Strength of Spurious Emissions
8. Out of Band Emissions
9. Conducted Emissions
10. Appendix Summary
11. Appendix A
12. Appendix B
13. Appendix C
14. Appendix D
15. Appendix Photographs

1. General Information

1.1 Product Description for Equipment Under Test (EUT)

Client Information

General Description of EUT

Note: The test data is gathered from a production sample, provided by the manufacturer.

Technical Characteristics of EUT

Note: The Antenna Gain is provided by the customer and can affect the validity of results.

1.2 Test Standards

The tests were performed according to the following standards:

• FCC Rules Part 15.247: Frequency Hopping, Direct Spread Spectrum and Hybrid Systems operating within 902-928MHz, 2400-2483.5MHz, and 5725-5850MHz bands.
• 558074 D01 15.247 Meas Guidance v05r02: Guidance for Compliance Measurements on Digital Transmission System, Frequency Hopping Spread Spectrum System, and Hybrid System Devices Operating under section 15.247 of the FCC rules.
• ANSI C63.10-2013: American National Standard for Testing Unlicensed Wireless Devices.

Maintenance of compliance is the responsibility of the manufacturer. Any modification of the product which results in lowering the emission should be checked to ensure compliance has been maintained.

1.3 Test Methodology

All measurements contained in this report were conducted with ANSI C63.10-2013, KDB 558074 D01 15.247 Meas Guidance v05r02. The equipment under test (EUT) was configured to measure its highest possible emission level. The test modes were adapted accordingly in reference to the Operating Instructions.

1.4 Test Facility

Address of the test laboratory

Laboratory: Waltek Testing Group (Shenzhen) Co., Ltd.

Address: 1/F., Room 101, Building 1, Hongwei Industrial Park, Liuxian 2nd Road, Block 70 Bao'an District, Shenzhen, Guangdong, China

FCC - Registration No.: 125990

Waltek Testing Group (Shenzhen) Co., Ltd. EMC Laboratory has been registered and fully described in a report filed with the FCC (Federal Communications Commission). The acceptance letter from the FCC is maintained in their files. The Designation Number is CN5010, and Test Firm Registration Number is 125990.

Industry Canada (IC) Registration No.: 11464A

The 3m Semi-anechoic chamber of Waltek Testing Group (Shenzhen) Co., Ltd. has been registered by Certification and Engineering Bureau of Industry Canada for radio equipment testing with Registration No.: 11464A.

1.5 EUT Setup and Test Mode

The EUT was operated in engineering mode to fix the Tx frequency for measurements. All testing was performed under maximum output power condition, with a duty cycle equal to 100%, to measure its highest possible emissions level.

Test Mode List

Test Conditions

EUT Cable List and Details

Special Cable List and Details

Auxiliary Equipment List and Details

1.6 Measurement Uncertainty

1.7 Test Equipment List and Details

Software List

*Remark: indicates software version used in the compliance certification testing.

2. Summary of Test Results

N/A: Not applicable.

3. Antenna Requirement

3.1 Standard Applicable

According to FCC Part 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.

3.2 Evaluation Information

This product has a PCB antenna, fulfilling the requirement of this section.

4. Power Spectral Density

4.1 Standard Applicable

According to 15.247(a)(1)(iii), for digitally modulated systems, the power spectral density conducted from the intentional radiator to the antenna shall not be greater than 8dBm in any 3kHz band during any time interval of continuous transmission.

4.2 Test Setup Block Diagram

The test setup involves the EUT connected via an RF cable to an attenuator, which is then connected to a spectrum analyzer. This configuration allows for direct measurement of the conducted power spectral density.

4.3 Test Procedure

The test method for power spectral density follows KDB 558074 D01 v05r02 Subclause 8.4 and ANSI C63.10-2013 Subclause 11.10.2:

1. Set analyzer center frequency to DTS channel center frequency.
2. Set the span to 1.5 times the DTS bandwidth.
3. Set the Resolution Bandwidth (RBW) to: 3kHz < RBW ≤ 100kHz.
4. Set the Video Bandwidth (VBW) ≥ 3 × RBW.
5. Detector = peak.
6. Sweep time = auto couple.
7. Trace mode = max hold.
8. Allow trace to fully stabilize.
9. Use the peak marker function to determine the maximum amplitude level within the RBW.
10. If measured value exceeds limit, reduce RBW (no less than 3kHz) and repeat.

4.4 Summary of Test Results/Plots

Please refer to Appendix A for detailed test results and plots. The power spectral density measurements for GFSK (BLE) mode across low, middle, and high channels were all compliant, with values ranging from -13.45 dBm/3kHz to -13.30 dBm/3kHz, well below the 8 dBm/3kHz limit.

5. DTS Bandwidth

5.1 Standard Applicable

According to 15.247(a)(2), systems using digital modulation techniques may operate in the 902–928MHz, 2400-2483.5MHz, and 5725–5850 MHz bands. The minimum 6dB bandwidth shall be at least 500kHz.

5.2 Test Setup Block Diagram

The test setup for DTS Bandwidth is similar to Power Spectral Density, with the EUT connected via an RF cable to an attenuator, and then to a spectrum analyzer for conducted measurements.

5.3 Test Procedure

The test method for DTS Bandwidth follows KDB 558074 D01 v05r02 Subclause 8.2 and ANSI C63.10-2013 Subclause 11.8.1:

1. Set RBW = 100kHz.
2. Set the VBW ≥ 3 × RBW.
3. Detector = Peak.
4. Trace mode = max hold.
5. Sweep = auto couple.
6. Allow the trace to stabilize.
7. Measure the maximum width of the emission that is constrained by the frequencies associated with the two outermost amplitude points (upper and lower frequencies) that are attenuated by 6dB relative to the maximum level measured in the fundamental emission.

5.4 Summary of Test Results/Plots

Please refer to Appendix B for detailed test results and plots. The 6dB bandwidth measurements for GFSK (BLE) mode across low, middle, and high channels were all compliant, with values of 660 kHz (Low), 663 kHz (Middle), and 660 kHz (High), all exceeding the minimum 500 kHz requirement.

6. RF Output Power

6.1 Standard Applicable

According to 15.247(b)(3), for systems using digital modulation in the 902–928MHz, 2400–2483.5MHz, and 5725-5850MHz bands, the maximum RF output power shall not exceed 1 Watt.

6.2 Test Setup Block Diagram

The test setup for RF Output Power involves the EUT connected via an RF cable to an attenuator, and then to a spectrum analyzer for conducted measurements.

6.3 Test Procedure

The test procedure for RF Output Power follows KDB-558074 D01 v05r02 Subclause 8.3.1.1 and ANSI C63.10-2013 Subclause 11.9.1.1:

1. Set the RBW ≥ DTS bandwidth.
2. Set VBW ≥ 3 × RBW.
3. Set span ≥ 3xRBW.
4. Sweep time = auto couple.
5. Detector = peak.
6. Trace mode = max hold.
7. Allow trace to fully stabilize.
8. Use peak marker function to determine the peak amplitude level.

6.4 Summary of Test Results/Plots

Please refer to Appendix C for detailed test results and plots. The RF output power measurements for GFSK (BLE) mode across low, middle, and high channels were all compliant, with values ranging from 1.45 dBm to 2.28 dBm, well below the 30.00 dBm (1 Watt) limit.

7. Field Strength of Spurious Emissions

7.1 Standard Applicable

According to §15.247(d), in any 100kHz bandwidth outside the operating frequency band, the radio frequency power produced by the intentional radiator shall be at least 20dB below that in the 100kHz bandwidth within the band containing the highest level of desired power (based on RF conducted or radiated measurement). If compliance is based on RMS averaging, the attenuation required is 30dB. Radiated emissions in restricted bands (§15.205(a)) must comply with §15.209(a) limits. The emission limit is based on measurement instrumentation employing an average detector, with peak emission limits applying per §15.35. Spurious Radiated Emissions measurements start below or at the lowest crystal frequency.

7.2 Test Procedure

The EUT setup follows ANSI C63.10-2013 measurement procedure, with specifications from FCC Part 15.205, 15.247(a), and 15.209 Limit. External I/O cables were draped along the test table (30-40cm bundle), with 10cm spacing between peripherals.

Test Setup for Emission Measurement Below 30MHz

The setup uses a semi-anechoic 3m chamber. The EUT is placed on a turn table (0.8m high) which rotates from 0° to 360°. An antenna is positioned 3m away. The EUT is connected to a PC System, Spectrum Analyzer, AMP, and Combining Network.

Test Setup for Emission Measurement from 30MHz to 1GHz

This setup also uses a semi-anechoic 3m chamber. The EUT is on a turn table (0.8m high) rotating 0° to 360°. An antenna varies in elevation from 1m to 4m, positioned 3m from the EUT. The EUT is connected to a PC System, Spectrum Analyzer, AMP, and Combining Network.

Test Setup for Emission Measurement Above 1GHz

This setup uses an anechoic 3m chamber with absorbers. The EUT is on a turn table (1.5m high) rotating 0° to 360°. An antenna varies in elevation from 1m to 4m, positioned 3m from the EUT. The EUT is connected to a PC System, Spectrum Analyzer, AMP, and Combining Network.

Frequency Settings for Measurements:

• 9kHz-30MHz: RBW=10KHz, VBW=30KHz, Sweep time=Auto, Trace=max hold, Detector function=peak.
• 30MHz-1GHz: RBW=120KHz, VBW=300KHz, Sweep time=Auto, Trace=max hold, Detector function=peak, QP.
• Above 1GHz: RBW=1MHz, VBW=3MHz(Peak), 10Hz(AV), Sweep time=Auto, Trace=max hold, Detector function=peak, AV.

7.3 Corrected Amplitude & Margin Calculation

The Corrected Amplitude is calculated by adding the Antenna Factor and the Cable Factor, and subtracting the Amplifier Gain from the Amplitude reading. The equation is: Corrected Amplitude = Indicated Reading + Antenna Factor + Cable Loss – Amplifier Gain.

The Margin indicates compliance with the applicable limit. A negative margin means the emission is below the maximum limit. The equation is: Margin = Corrected Amplitude – FCC Part 15 Limit.

7.4 Summary of Test Results/Plots

The EUT was tested in 3 orthogonal positions, and the worst-case position data was reported.

Spurious Emissions Below 1GHz (Low Channel, Horizontal Polarity)

A plot shows the measured spurious emissions from 30MHz to 1000MHz. All measured peak emissions were well below the Limit1 line. For example, at 143.8295 MHz, the result was 27.49 dBuV/m with a margin of -16.01 dB, and at 480.5276 MHz, the result was 36.41 dBuV/m with a margin of -9.59 dB. All reported measurements were compliant.

Spurious Emissions Below 1GHz (Low Channel, Vertical Polarity)

A plot shows the measured spurious emissions from 30MHz to 1000MHz. All measured peak emissions were well below the Limit1 line. For example, at 125.4457 MHz, the result was 24.70 dBuV/m with a margin of -18.80 dB, and at 760.7036 MHz, the result was 29.98 dBuV/m with a margin of -16.02 dB. All reported measurements were compliant.

Spurious Emissions Above 1GHz

Testing was carried out from 9kHz to the tenth harmonics. Other than listed in the table, attenuated emissions were more than 20dB below permissible limits or too small to be measured.

8. Out of Band Emissions

8.1 Standard Applicable

According to §15.247(d), in any 100kHz bandwidth outside the operating frequency band, the radio frequency power produced by the intentional radiator shall be at least 20dB below that in the 100kHz bandwidth within the band containing the highest level of desired power (based on RF conducted or radiated measurement). If compliance is based on RMS averaging, the attenuation required is 30dB. Radiated emissions in restricted bands (§15.205(a)) must comply with §15.209(a) limits.

8.2 Test Procedure

The test procedure for emissions in non-restricted frequency bands follows KDB 558074 D01 v05r02 Subclause 8.4 and ANSI C63.10-2013 Subclause 11.11:

1. Set center frequency and span to encompass frequency range to be measured.
2. Set RBW = 100kHz.
3. Set VBW ≥ [3 × RBW].
4. Detector = peak.
5. Sweep time = auto couple.
6. Trace mode = max hold.
7. Allow trace to fully stabilize.
8. Use peak marker function to determine the maximum amplitude level.

The test procedure for emissions in restricted frequency bands follows KDB 558074 D01 v05r02 Subclause 8.5 and ANSI C63.10-2013 Subclause 11.12:

A. Radiated emission measurements:

Set span wide enough to capture peak level of emission operating on channel closest to bandedge, and any modulation products outside authorized band (2310MHz-2420MHz for low bandedge, 2460MHz-2500MHz for high bandedge). RBW = 1MHz, VBW = 1MHz for peak value; RBW = 1MHz, VBW = 10Hz for average value. Sweep = auto; Detector function = peak/average; Trace = max hold. Allow trace to stabilize, set marker on emission at bandedge or highest modulation product outside band. Enable marker-delta function, then use marker-to-peak function to move marker to peak of in-band emission. Emissions must comply with 15.209 limit for restricted bands listed in 15.205. KDB publication number: 913591 may be used for radiated bandedge measurements.

B. Antenna-port conducted measurements:

Peak emission levels are measured by setting the instrument as follows:

1. RBW = as specified in Table 9.
2. VBW ≥ [3 × RBW].
3. Detector = peak.
4. Sweep time = auto.
5. Trace mode = max hold.
6. Allow sweeps to continue until the trace stabilizes.

RBW as a function of frequency

If the peak-detected amplitude can be shown to comply with the average limit, a separate average measurement is not necessary. Ensure that the amplitude of all unwanted emissions outside of the authorized frequency band (excluding restricted frequency bands) are attenuated by at least the minimum requirements specified in section 8.1. Report the three highest emissions relative to the limit.

8.3 Summary of Test Results/Plots

Radiated Test (Low Channel, Horizontal Polarity)

A plot shows radiated emissions for the low channel (2402 MHz) from 2310 MHz to 2410 MHz. The plot indicates that both average and peak detector measurements are well below their respective limits (54 dBuV/m for average, 74 dBuV/m for peak). For example, at 2310.000 MHz, the average result was 30.14 dBuV/m (-23.86 dB margin) and the peak result was 42.85 dBuV/m (-31.15 dB margin). The fundamental emission at 2402.000 MHz showed a peak of 89.48 dBuV/m.

Radiated Test (High Channel, Horizontal Polarity)

A plot shows radiated emissions for the high channel (2480 MHz) from 2475 MHz to 2500 MHz. The plot indicates that both average and peak detector measurements are well below their respective limits. For example, at 2483.500 MHz, the average result was 34.84 dBuV/m (-19.16 dB margin) and the peak result was 45.16 dBuV/m (-28.84 dB margin). The fundamental emission at 2479.700 MHz showed a peak of 80.57 dBuV/m.

Conducted Test

Please refer to Appendix D for detailed conducted out-of-band emission results and plots. All conducted emissions were compliant with the specified limits.

9. Conducted Emissions

9.1 Test Procedure

The EUT setup follows ANSI C63.10-2013 measurement procedure, with specifications from FCC Part 15.207 Limit. External I/O cables were draped along the test table (30-40cm bundle), with 10cm spacing between peripherals.

9.2 Basic Test Setup Block Diagram

The setup for conducted emissions involves the EUT connected to a LISN (Line Impedance Stabilization Network) which is then connected to a Receiver and PC System. The EUT is placed 0.4m from the LISN, and the LISN is connected to a 50Ω Terminator. The EUT is 0.8m above the ground plane.

9.3 Test Receiver Setup

During the conducted emission test, the test receiver was set with the following configurations:

• Start Frequency: 150kHz
• Stop Frequency: 30MHz
• Sweep Speed: Auto
• IF Bandwidth: 10kHz
• Quasi-Peak Adapter Bandwidth: 9kHz
• Quasi-Peak Adapter Mode: Normal

9.4 Summary of Test Results/Plots

Conducted Emissions (AC120V 60Hz, Line Polarity)

A plot shows conducted emissions from 0.150 MHz to 30.0 MHz. The plot indicates that both Quasi-Peak (QP) and Average (AVG) detector measurements are below their respective limits. For example, at 0.1900 MHz, the QP result was 63.93 dBuV (-0.11 dB margin) and the AVG result was 50.19 dBuV (-3.67 dB margin). All reported measurements were compliant.

Conducted Emissions (AC120V 60Hz, Neutral Polarity)

A plot shows conducted emissions from 0.150 MHz to 30.0 MHz. The plot indicates that both Quasi-Peak (QP) and Average (AVG) detector measurements are below their respective limits. For example, at 0.1940 MHz, the QP result was 62.55 dBuV (-1.31 dB margin) and the AVG result was 45.91 dBuV (-7.95 dB margin). All reported measurements were compliant.

Appendix Summary

Appendix A: Power Spectral Density Plots

This appendix contains detailed plots for the Power Spectral Density measurements for the Govee Smart Outdoor Plug in GFSK (BLE) mode across low, middle, and high channels. Each plot shows the spectrum analyzer trace, confirming that the measured power spectral density remains below the 8 dBm/3kHz limit. For instance, the low channel showed a peak of -13.45 dBm, the middle channel -13.78 dBm, and the high channel -13.30 dBm, all well within compliance.

Appendix B: DTS Bandwidth Plots

This appendix presents the detailed plots for the 6dB DTS Bandwidth measurements. The plots illustrate the bandwidth of the digitally modulated signal for the GFSK (BLE) mode on low, middle, and high channels. All measured bandwidths (e.g., 660 kHz for low and high channels, 663 kHz for middle channel) exceed the minimum 500 kHz requirement, confirming compliance.

Appendix C: RF Output Power Plots

This appendix provides the detailed plots for the RF Output Power measurements. The plots show the peak output power for the GFSK (BLE) mode on low, middle, and high channels. The measured values (e.g., 1.45 dBm for low, 1.85 dBm for middle, and 2.28 dBm for high channels) are significantly below the 30.00 dBm (1 Watt) limit, demonstrating compliance.

Appendix D: Conducted Out of Band Emissions Plots

This appendix contains detailed plots for the conducted out-of-band emissions. The plots demonstrate that emissions outside the authorized frequency bands are attenuated by at least the required levels (20dB or 30dB below the in-band power). The measurements confirm that the Govee Smart Outdoor Plug complies with the out-of-band emission limits.

Appendix Photographs

Please refer to "ANNEX" for photographs related to the test setup and EUT.