Product Name: Wireless Keyboard
Trade Mark: Keychron
Test Model: K1
FCC ID: 2BGKB-K1
Report No.: TZ0015250101FRF02
| Temperature: | 23.5°C |
|---|---|
| Relative Humidity: | 58% |
| ATM Pressure: | 100.0 kPa |
| Test Engineer: | Allen Lai |
| Supervised by: | Hugo Chen |
| NOTE | N/A |
| Test Mode | Antenna | Frequency [MHz] | DTS BW [MHz] | FL [MHz] | FH [MHz] | Limit [MHz] | Verdict |
|---|---|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | 0.660 | 2401.668 | 2402.328 | 0.5 | PASS |
| BLE_1M | Ant1 | 2440 | 0.704 | 2439.656 | 2440.360 | 0.5 | PASS |
| BLE_1M | Ant1 | 2480 | 0.660 | 2479.676 | 2480.336 | 0.5 | PASS |
The following spectrum analyzer plots illustrate the DTS Bandwidth measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing the DTS Bandwidth for BLE_1M on Antenna 1 at 2402 MHz. The measurement was performed with a center frequency of 2.402 GHz and a span of 4.000 MHz. The plot indicates a DTS Bandwidth of 660 kHz, with the signal falling within the specified limits. The verdict is PASS.
Spectrum analyzer plot showing the DTS Bandwidth for BLE_1M on Antenna 1 at 2440 MHz. The measurement was performed with a center frequency of 2.440 GHz and a span of 4.000 MHz. The plot indicates a DTS Bandwidth of 704 kHz, with the signal falling within the specified limits. The verdict is PASS.
Spectrum analyzer plot showing the DTS Bandwidth for BLE_1M on Antenna 1 at 2480 MHz. The measurement was performed with a center frequency of 2.480 GHz and a span of 4.000 MHz. The plot indicates a DTS Bandwidth of 660 kHz, with the signal falling within the specified limits. The verdict is PASS.
| Test Mode | Antenna | Frequency [MHz] | OCB [MHz] | FL [MHz] | FH [MHz] | Limit [MHz] | Verdict |
|---|---|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | 1.0344 | 2401.4878 | 2402.5222 | --- | --- |
| BLE_1M | Ant1 | 2440 | 1.0368 | 2439.4819 | 2440.5187 | --- | --- |
| BLE_1M | Ant1 | 2480 | 1.0386 | 2479.4840 | 2480.5226 | --- | --- |
The following spectrum analyzer plots illustrate the Occupied Channel Bandwidth measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Occupied Bandwidth for BLE_1M on Antenna 1 at 2402 MHz. The plot displays signal power distribution. Key measurements include: Occupied Bandwidth of 1.0344 MHz, Total Power of 4.62 dBm, Transmit Freq Error of 5.000 kHz, OBW Power of 99.00%, and x dB Bandwidth of 1.263 MHz at -26.00 dB.
Spectrum analyzer plot showing Occupied Bandwidth for BLE_1M on Antenna 1 at 2440 MHz. The plot displays signal power distribution. Key measurements include: Occupied Bandwidth of 1.0368 MHz, Total Power of 4.43 dBm, Transmit Freq Error of 323 Hz, OBW Power of 99.00%, and x dB Bandwidth of 1.267 MHz at -26.00 dB.
Spectrum analyzer plot showing Occupied Bandwidth for BLE_1M on Antenna 1 at 2480 MHz. The plot displays signal power distribution. Key measurements include: Occupied Bandwidth of 1.0386 MHz, Total Power of 3.48 dBm, Transmit Freq Error of 3.295 kHz, OBW Power of 99.00%, and x dB Bandwidth of 1.289 MHz at -26.00 dB.
| Test Mode | Antenna | Frequency [MHz] | Conducted Peak Power [dBm] | Conducted Limit [dBm] | Verdict |
|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | -2.09 | ≤30 | PASS |
| BLE_1M | Ant1 | 2440 | -2.02 | ≤30 | PASS |
| BLE_1M | Ant1 | 2480 | -2.80 | ≤30 | PASS |
The following spectrum analyzer plots illustrate the Maximum Peak Conducted Output Power measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Peak Conducted Output Power for BLE_1M on Antenna 1 at 2402 MHz. The plot displays the signal power level. Marker 1 indicates a peak power of -2.086 dBm. The verdict is PASS.
Spectrum analyzer plot showing Peak Conducted Output Power for BLE_1M on Antenna 1 at 2440 MHz. The plot displays the signal power level. Marker 1 indicates a peak power of -2.023 dBm. The verdict is PASS.
Spectrum analyzer plot showing Peak Conducted Output Power for BLE_1M on Antenna 1 at 2480 MHz. The plot displays the signal power level. Marker 1 indicates a peak power of -2.801 dBm. The verdict is PASS.
| Test Mode | Antenna | Frequency [MHz] | Result [dBm/3kHz] | Limit [dBm/3kHz] | Verdict |
|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | -18.55 | ≤8.00 | PASS |
| BLE_1M | Ant1 | 2440 | -18.56 | ≤8.00 | PASS |
| BLE_1M | Ant1 | 2480 | -19.30 | ≤8.00 | PASS |
The following spectrum analyzer plots illustrate the Maximum Peak Power Spectral Density measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Peak Power Spectral Density for BLE_1M on Antenna 1 at 2402 MHz. The plot displays the signal power density. Marker 1 indicates a peak value of -18.549 dBm/3kHz. The verdict is PASS.
Spectrum analyzer plot showing Peak Power Spectral Density for BLE_1M on Antenna 1 at 2440 MHz. The plot displays the signal power density. Marker 1 indicates a peak value of -18.555 dBm/3kHz. The verdict is PASS.
Spectrum analyzer plot showing Peak Power Spectral Density for BLE_1M on Antenna 1 at 2480 MHz. The plot displays the signal power density. Marker 1 indicates a peak value of -19.299 dBm/3kHz. The verdict is PASS.
| Test Mode | Antenna | Ch. Name | Frequency [MHz] | Ref. Level [dBm] | Result [dBm] | Limit [dBm] | Verdict |
|---|---|---|---|---|---|---|---|
| BLE_1M | Ant1 | Low | 2402 | -3.69 | -49.89 | ≤-23.69 | PASS |
| BLE_1M | Ant1 | High | 2480 | -3.91 | -49.02 | ≤-23.91 | PASS |
The following spectrum analyzer plots illustrate the Band Edge measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Band Edge measurement for BLE_1M on Antenna 1 at 2402 MHz (Low Channel). The plot covers frequencies from 2.30000 GHz to 2.40500 GHz. Marker 5 indicates a spurious emission level of -49.887 dBm. The verdict is PASS.
Spectrum analyzer plot showing Band Edge measurement for BLE_1M on Antenna 1 at 2480 MHz (High Channel). The plot covers frequencies from 2.47000 GHz to 2.55000 GHz. Marker 4 indicates a spurious emission level of -49.023 dBm. The verdict is PASS.
| Test Mode | Antenna | Frequency [MHz] | Freq. Range [MHz] | Ref. Level [dBm] | Result [dBm] | Limit [dBm] | Verdict |
|---|---|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | 0~Reference | -2.59 | -2.59 | --- | PASS |
| BLE_1M | Ant1 | 2402 | 30~1000 | -2.59 | -73.05 | ≤-22.59 | PASS |
| BLE_1M | Ant1 | 2402 | 1000~26500 | -2.59 | -54.75 | ≤-22.59 | PASS |
| BLE_1M | Ant1 | 2440 | 0~Reference | -2.60 | -2.60 | --- | PASS |
| BLE_1M | Ant1 | 2440 | 30~1000 | -2.60 | -71.96 | ≤-22.6 | PASS |
| BLE_1M | Ant1 | 2440 | 1000~26500 | -2.60 | -54.86 | ≤-22.6 | PASS |
| BLE_1M | Ant1 | 2480 | 0~Reference | -3.77 | -3.77 | --- | PASS |
| BLE_1M | Ant1 | 2480 | 30~1000 | -3.77 | -71.77 | ≤-23.77 | PASS |
| BLE_1M | Ant1 | 2480 | 1000~26500 | -3.77 | -55.78 | ≤-23.77 | PASS |
The following spectrum analyzer plots illustrate the Conducted Spurious Emission measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Conducted Spurious Emission (Reference Level) for BLE_1M on Antenna 1 at 2402 MHz. The plot shows the signal level at the reference frequency. Marker 1 indicates -2.592 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2402 MHz, in the frequency range 30 MHz to 1000 MHz. Marker 1 indicates a peak emission of -73.048 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2402 MHz, in the frequency range 1000 MHz to 26500 MHz. Marker 2 indicates a peak emission of -54.745 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission (Reference Level) for BLE_1M on Antenna 1 at 2440 MHz. The plot shows the signal level at the reference frequency. Marker 1 indicates -2.602 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2440 MHz, in the frequency range 30 MHz to 1000 MHz. Marker 1 indicates a peak emission of -71.956 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2440 MHz, in the frequency range 1000 MHz to 26500 MHz. Marker 2 indicates a peak emission of -54.861 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission (Reference Level) for BLE_1M on Antenna 1 at 2480 MHz. The plot shows the signal level at the reference frequency. Marker 1 indicates -3.771 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2480 MHz, in the frequency range 30 MHz to 1000 MHz. Marker 1 indicates a peak emission of -71.770 dBm. The verdict is PASS.
Spectrum analyzer plot showing Conducted Spurious Emission for BLE_1M on Antenna 1 at 2480 MHz, in the frequency range 1000 MHz to 26500 MHz. Marker 2 indicates a peak emission of -55.784 dBm. The verdict is PASS.
| Test Mode | Antenna | Frequency [MHz] | ON Time [ms] | Period [ms] | Duty Cycle [%] | Duty Cycle Factor [dB] |
|---|---|---|---|---|---|---|
| BLE_1M | Ant1 | 2402 | 19.00 | 19.00 | 100.00 | 0.00 |
| BLE_1M | Ant1 | 2440 | 19.00 | 19.00 | 100.00 | 0.00 |
| BLE_1M | Ant1 | 2480 | 19.00 | 19.00 | 100.00 | 0.00 |
The following spectrum analyzer plots illustrate the Duty Cycle measurements for the Keychron K1 Wireless Keyboard.
Spectrum analyzer plot showing Duty Cycle for BLE_1M on Antenna 1 at 2402 MHz. The plot displays the signal pulse train over a period of 19.00 ms, indicating a 100% duty cycle. The verdict is PASS.
Spectrum analyzer plot showing Duty Cycle for BLE_1M on Antenna 1 at 2440 MHz. The plot displays the signal pulse train over a period of 19.00 ms, indicating a 100% duty cycle. The verdict is PASS.
Spectrum analyzer plot showing Duty Cycle for BLE_1M on Antenna 1 at 2480 MHz. The plot displays the signal pulse train over a period of 19.00 ms, indicating a 100% duty cycle. The verdict is PASS.
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