Appendix B: RF Test Data for BT (BLE) (Conducted Measurement)
Report No.: AIT24021804FW2
FCC ID: 2A7DX-ACEBOOK8
Product Information
Product Name: Notebook computer
Trade Mark: Blackview
Test Model: AceBook 8
Environmental Conditions
Temperature: 25.5° C
Relative Humidity: 52.2%
ATM Pressure: 100.0 kPa
Test Engineer: Simba Huang
Supervised by: Seal Chen
1. Duty Cycle
1.1 Test Result
| Mode | Frequency (MHz) | Duty Cycle (%) | Correction Factor | 1/T (kHz) |
|---|---|---|---|---|
| BLE 1M | 2402 | 64.8 | 1.88 | 2.5 |
| BLE 1M | 2440 | 64.8 | 1.88 | 2.5 |
| BLE 1M | 2480 | 64.8 | 1.88 | 2.5 |
1.2 Test Graphs
The following spectrum analyzer plots illustrate the duty cycle measurements for Bluetooth Low Energy (BLE) at different frequencies (2402 MHz, 2440 MHz, 2480 MHz). These graphs show the signal's on-time and off-time characteristics, confirming the duty cycle percentage reported in the table above.
2. Maximum Conducted Output Power
2.1 Test Result
| Mode | Frequency (MHz) | Conducted Power (dBm) | Limit (dBm) | Verdict |
|---|---|---|---|---|
| BLE 1M | 2402 | 2.45 | 30 | Pass |
| BLE 1M | 2440 | 2.95 | 30 | Pass |
| BLE 1M | 2480 | 3.56 | 30 | Pass |
2.2 Test Graphs
These spectrum analyzer plots display the conducted output power measurements for BLE at 2402 MHz, 2440 MHz, and 2480 MHz. The peak power levels are shown, confirming compliance with the specified limit of 30 dBm.
3. -6dB Bandwidth
3.1 Test Result
| Mode | Frequency (MHz) | -6 dB Bandwidth (MHz) | Limit -6 dB Bandwidth (MHz) | Verdict |
|---|---|---|---|---|
| BLE 1M | 2402 | 0.708 | 0.5 | Pass |
| BLE 1M | 2440 | 0.653 | 0.5 | Pass |
| BLE 1M | 2480 | 0.697 | 0.5 | Pass |
3.2 Test Graphs
The spectrum analyzer plots for the -6dB bandwidth test at 2402 MHz, 2440 MHz, and 2480 MHz are presented. These graphs visually represent the measured bandwidths, which are compared against the 0.5 MHz limit.
4. Maximum Power Spectral Density Level
4.1 Test Result
| Mode | Frequency (MHz) | Conducted PSD (dBm/3-100kHz) | Limit (dBm/3kHz) | Verdict |
|---|---|---|---|---|
| BLE 1M | 2402 | -11.09 | <8 | Pass |
| BLE 1M | 2440 | -10.66 | <8 | Pass |
| BLE 1M | 2480 | -10.18 | <8 | Pass |
4.2 Test Graphs
These spectrum analyzer plots illustrate the Power Spectral Density (PSD) measurements for BLE at 2402 MHz, 2440 MHz, and 2480 MHz. The plots show the peak PSD levels, which are confirmed to be below the limit of 8 dBm/3kHz.
5. Band Edge
5.1 Test Result
| Mode | Frequency (MHz) | Max Value (dBc) | Limit (dBc) | Verdict |
|---|---|---|---|---|
| BLE 1M | 2402 | -58.19 | -20 | Pass |
| BLE 1M | 2480 | -52.51 | -20 | Pass |
5.2 Test Graphs
The spectrum analyzer plots for the Band Edge test are shown for the lower (2402 MHz) and upper (2480 MHz) band edges. These graphs depict the signal power at the band edges relative to the carrier, demonstrating compliance with the -20 dBc limit.
6. Conducted RF Spurious Emission
6.1 Test Result
| Mode | Frequency (MHz) | Max Value (dBc) | Limit (dBc) | Verdict |
|---|---|---|---|---|
| BLE 1M | 2402 | -44.17 | -20 | Pass |
| BLE 1M | 2440 | -44.43 | -20 | Pass |
| BLE 1M | 2480 | -45.56 | -20 | Pass |
6.2 Test Graphs
These spectrum analyzer plots present the results of the Conducted RF Spurious Emission tests across various frequency ranges. The graphs show the measured spurious emission levels, which are well below the specified limit of -20 dBc.
7. Restrict Band
7.1 Test Result
| Mode | Frequency (MHz) | Spur Freq (MHz) | Power (dBm) | Gain (dBi) | Duty Factor | E (dBuV/m) | Detector | Limit (dBuV/m) | Verdict |
|---|---|---|---|---|---|---|---|---|---|
| BLE 1M | 2402 | 2310 | -49.83 | 2 | - | 47.43 | Peak | 74 | Pass |
| BLE 1M | 2402 | 2310 | -56.73 | 2 | 1.88 | 42.41 | Average | 54 | Pass |
| BLE 1M | 2402 | 2338.32 | -44.93 | 2 | - | 52.33 | Peak | 74 | Pass |
| BLE 1M | 2402 | 2341.776 | -54.62 | 2 | 1.88 | 44.52 | Average | 54 | Pass |
| BLE 1M | 2402 | 2390 | -49.64 | 2 | - | 47.62 | Peak | 74 | Pass |
| BLE 1M | 2402 | 2390 | -56.56 | 2 | 1.88 | 42.58 | Average | 54 | Pass |
| BLE 1M | 2480 | 2483.5 | -44.69 | 2 | - | 52.57 | Peak | 74 | Pass |
| BLE 1M | 2480 | 2483.5 | -53.06 | 2 | 1.88 | 46.08 | Average | 54 | Pass |
| BLE 1M | 2480 | 2484.904 | -44.1 | 2 | - | 53.16 | Peak | 74 | Pass |
| BLE 1M | 2480 | 2484.928 | -50.83 | 2 | 1.88 | 48.31 | Average | 54 | Pass |
| BLE 1M | 2480 | 2500 | -49.29 | 2 | - | 47.97 | Peak | 74 | Pass |
| BLE 1M | 2480 | 2500 | -56.36 | 2 | 1.88 | 42.78 | Average | 54 | Pass |
7.2 Test Graphs
The spectrum analyzer plots for the Restrict Band tests at 2402 MHz and 2480 MHz are provided, showing both peak and average measurements. These graphs illustrate the signal levels within restricted frequency bands, confirming adherence to the specified limits.
