FCC TEST REPORT
Report No.: 18220WC10279107
FCC ID: 2AQI5-CM324
1. General Information
Client Name: Ugreen Group Limited
Address: Ugreen Building, Longcheng Industrial Park, Longguanxi Road, Longhua, ShenZhen, China
Product Name: Bluetooth Transmitter Adapter For Swich
Date: Jan. 21, 2022
2. Summary of Test Results
| Standard Section | Test Item | Result |
|---|---|---|
| 15.203/15.247(c) | Antenna Requirement | PASS |
| 15.207 | Conducted Emission | PASS |
| 15.205/15.209 | Spurious Emission | PASS |
| 15.247(b)(1) | Conducted Peak Output Power | PASS |
| 15.247(a)(1) | 20dB Occupied Bandwidth | PASS |
| 15.247(a)(1) | Carrier Frequencies Separation | PASS |
| 15.247(a)(1) | Hopping Channel Number | PASS |
| 15.247(a)(1) | Dwell Time | PASS |
| 15.247(d) | Band Edge | PASS |
Remark: "N/A" is an abbreviation for Not Applicable.
3. Conducted Emission Test
3.1. Test Standard and Limit
| Test Standard | Frequency (MHz) | Maximum RF Line Voltage (dBuV) | |
|---|---|---|---|
| Quasi-peak Level | Average Level | ||
| FCC Part15 Section 15.207 | 150kHz~500kHz | 66 ~ 56 * | 56 ~ 46 * |
| 500kHz~5MHz | 56 | 46 | |
| 5MHz~30MHz | 60 | 50 |
Remark: (1) *Decreasing linearly with logarithm of the frequency. (2) The lower limit shall apply at the transition frequency.
3.2. Test Setup
A diagram illustrating the conducted emission test setup shows an EUT connected via USB to an adapter, which is connected to an AC Line through a Line Impedance Stabilization Network (LISN). The setup includes a shielding room, a table, and a test receiver.
3.3. Test Procedure
The EUT system is connected to the power mains through a line impedance stabilization network (L.I.S.N.). This provides a 50ohm coupling impedance for the EUT system. The test setup and photographs are referenced. Both sides of the AC line are checked to find out the maximum conducted emission. To find the maximum emission levels, the relative positions of equipment and all interface cables are adjusted according to FCC ANSI C63.10: 2020. The test receiver bandwidth (ESCI) is set at 9kHz. The frequency range from 150kHz to 30MHz is checked.
3.4. Test Data
During the test, pre-scan was performed using GFSK, π/4QPSK, and 8DPSK modulation. The GFSK modulation on the low channel (TX+Charging Mode) was identified as the worst case, and only these results are recorded. Graphical data for conducted emissions on Live Line and Neutral Line are presented.
4. Radiation Spurious Emission and Band Edge
4.1. Test Standard and Limit
| Test Standard | Frequency (MHz) | Field strength (microvolt/meter) | Limit (dBuV/m) | Remark | Measurement distance (m) |
|---|---|---|---|---|---|
| FCC Part15 C Section 15.209 and 15.205 | 0.009MHz~0.490MHz | 2400/F(kHz) | - | - | 300 |
| 0.490MHz-1.705MHz | 24000/F(kHz) | - | - | 30 | |
| 1.705MHz-30MHz | 30 | - | - | 30 | |
| 30MHz~88MHz | 100 | 40.0 | Quasi-peak | 3 | |
| 88MHz~216MHz | 150 | 43.5 | Quasi-peak | 3 | |
| 216MHz~960MHz | 200 | 46.0 | Quasi-peak | 3 | |
| 960MHz~1000MHz | 500 | 54.0 | Quasi-peak | 3 | |
| Above 1000MHz | 500 | 54.0 | Average | 3 | |
| - | 74.0 | Peak | 3 |
Remark: (1)The lower limit shall apply at the transition frequency. (2) 15.35(b), Unless otherwise specified, the limit on peak radio frequency emissions is 20dB above the maximum permitted average emission limit applicable to the equipment under test. This peak limit applies to the total peak emission level radiated by the device.
4.2. Test Setup
Diagrams illustrate the test setup for radiated emissions below 30MHz (Figure 1), between 30MHz and 1GHz (Figure 2), and above 1GHz (Figure 3). These setups involve an EUT, spectrum analyzer, antenna, and ground plane, with specific distances and heights indicated.
4.3. Test Procedure
For radiated emissions below 1GHz, the EUT is placed on a turntable 0.8m above the ground plane. For emissions above 1GHz, the EUT is placed on a turntable 1.5m above the ground plane. The turntable rotates 360 degrees to find the maximum emission level. The EUT is positioned 3 meters from the receiving antenna, which is mounted on an antenna tower adjustable from 1 to 4 meters. The EUT is rotated through three orthogonal axes, and both horizontal and vertical antenna polarizations are tested. The device is evaluated in a 9*6*6 Chamber in xyz orientation.
For radiated emission tests above 1GHz, the measurement antenna is positioned to capture emissions from the EUT at the specified distance, while aiming at the source. Antenna height is adjusted between 1m and 4m to maximize emissions. The EUT is tested in various orientations.
Specific spectrum analyzer settings are provided for different frequency ranges (9kHz-150kHz, 150kHz-30MHz, 30MHz-1000MHz, and above 1GHz), including RBW, VBW, detector function, and trace mode.
4.4. Test Data
The test results indicate 'PASS' for the conducted emission tests. Graphical data for conducted emissions at different frequencies and polarizations are presented. For radiated emissions, the worst-case modulation and channel (GFSK, Low channel TX) were identified and recorded. Results below permissible limits were not recorded.
5. Maximum Peak Output Power Test
5.1. Test Standard and Limit
Test Standard: FCC Part15 C Section 15.247 (b)(1)
Test Limit: For frequency hopping systems operating in the 2400-2483.5 MHz band with at least 75 non-overlapping channels, the limit is 1 watt. For other frequency hopping systems in the 2400-2483.5 MHz band, the limit is 0.125 watts.
5.2. Test Setup
A diagram shows the EUT connected directly to a spectrum analyzer via the antenna output port.
5.3. Test Procedure
The EUT is connected to the spectrum analyzer. Spectrum analyzer settings include: RBW greater than the 20 dB bandwidth, Span approximately 5 times the 20 dB bandwidth, VBW ≥ RBW, Sweep set to auto, Detector function set to peak, and Trace set to max hold.
5.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix C.
6. 20DB Occupy Bandwidth Test
6.1. Test Standard
Test Standard: FCC Part15 C Section 15.247 (a)(1)
6.2. Test Setup
A diagram shows the EUT connected to a spectrum analyzer.
6.3. Test Procedure
The EUT's hopping function is enabled. Spectrum analyzer settings include: Span approximately 2 to 3 times the 20dB bandwidth, centered on a hopping channel; RBW ≥ 1% of the 20 dB bandwidth; VBW ≥ RBW; Sweep time set to auto couple; Detector function set to peak; Trace mode set to max hold; Allow trace to fully stabilize.
6.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix A.
7. Carrier Frequency Separation Test
7.1. Test Standard and Limit
Test Standard: FCC Part15 C Section 15.247 (a)(1)
Test Limit: >25KHz or >two-thirds of the 20 dB bandwidth
7.2. Test Setup
A diagram shows the EUT connected to a spectrum analyzer.
7.3. Test Procedure
The EUT's hopping function is enabled. Spectrum analyzer settings include: Span wide enough to capture peaks of two adjacent channels; RBW approximately 30% of the channel spacing; VBW ≥ RBW; Sweep time set to auto couple; Detector function set to peak; Trace mode set to max hold; Allow trace to fully stabilize.
7.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix D.
8. Number of Hopping Channel Test
8.1. Test Standard and Limit
Test Standard: FCC Part15 C Section 15.247 (a)(1)
Test Limit: >15 channels
8.2. Test Setup
A diagram shows the EUT connected to a spectrum analyzer.
8.3. Test Procedure
The EUT's hopping function is enabled. Spectrum analyzer settings include: Span set to the frequency band of operation; RBW less than 30% of the channel spacing or 20 dB bandwidth (whichever is smaller); VBW ≥ RBW; Sweep time set to auto couple; Detector function set to peak; Trace mode set to max hold; Allow trace to fully stabilize.
8.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix F.
9. Dwell Time Test
9.1. Test Standard and Limit
Test Standard: FCC Part15 C Section 15.247 (a)(1)
Test Limit: 0.4 sec
9.2. Test Setup
A diagram shows the EUT connected to a spectrum analyzer.
9.3. Test Procedure
The EUT's hopping function is enabled. Spectrum analyzer settings include: Span set to zero span, centered on a hopping channel; RBW = 1 MHz; VBW = 1 MHz; Sweep time set as necessary to capture the entire dwell time per hopping channel; Detector function set to peak; Trace mode set to max hold; Allow trace to fully stabilize.
9.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix E.
10. 100kHz Bandwidth of Frequency Band Edge Requirement
10.1. Test Standard and Limit
Test Standard: FCC Part15 C Section 15.247 (d)
Test Limit: Outside the frequency bands of operation, 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 the desired power. Radiated emissions falling in restricted bands must comply with limits specified in 15.209(a).
10.2. Test Setup
A diagram shows the EUT connected to a spectrum analyzer.
10.3. Test Procedure
The EUT's hopping/Non-hopping function is enabled. Spectrum analyzer settings include: RBW = 100kHz; VBW = 300kHz; Sweep time = auto couple; Detector function = peak; Trace mode = max hold; Allow trace to fully stabilize.
10.4. Test Data
The test result is 'PASS'. Detailed data is available in Appendix G & Appendix H.
11. Antenna Requirement
11.1. Test Standard and Requirement
Test Standard: FCC Part15 Section 15.203 /247(c)
Requirement:
- 15.203: The intentional radiator must use an antenna furnished by the responsible party. Standard antenna jacks or electrical connectors are prohibited.
- 15.247(c)(1)(i): For fixed point-to-point operations in the 2400-2483.5 MHz band, directional gain greater than 6dBi requires a 1 dB reduction in maximum output power for every 3 dB increase in directional gain above 6 dBi.
11.2. Antenna Connected Construction
The device features a permanently attached Ceramic ANT with a maximum gain of 1.5 dBi, which complies with the standard requirements.
Appendices
APPENDIX I -- TEST SETUP PHOTOGRAPH
Photographs of the conducted emission measurement setup and the radiation emission test setup are provided.
APPENDIX II -- EXTERNAL PHOTOGRAPH
External photographs of the device are provided, showing its physical appearance and dimensions.
APPENDIX III -- INTERNAL PHOTOGRAPH
Internal photographs of the device are provided, showing the circuit board and battery.
APPENDIX IV Appendix Test Data
Additional test data is available in Appendix IV.
