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BladeRF: updated documentation

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f4exb 2019-04-12 13:20:07 +02:00
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39
plugins/samplesink/bladerf1output/readme.md
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@ -60,18 +60,9 @@ For lower interpolation rates the size is calculated to give a fixed delay of 25
This is the center frequency of transmission in kHz. This is the center frequency of transmission in kHz.
<h3>4: Interpolation factor</h3> <h3>4: Tx filter bandwidth</h3>
The baseband stream is interpolated by this value before being sent to the BladeRF device. Possible values are: This is the Tx filter bandwidth in kHz in the LMS6002D device. Possible values are: 1500, 1750, 2500, 2750, 3000, 3840, 5000, 5500, 6000, 7000, 8750, 10000, 12000, 14000, 20000, 28000 kHz.
- **1**: no interpolation
- **2**: multiply baseband stream sample rate by 2
- **4**: multiply baseband stream sample rate by 4
- **8**: multiply baseband stream sample rate by 8
- **16**: multiply baseband stream sample rate by 16
- **32**: multiply baseband stream sample rate by 32
The main samples buffer is based on the baseband sample rate and will introduce ~500ms delay for interpolation by 16 or lower and ~1s for interpolation by 32.
<h3>5: XB-200 add-on control</h3> <h3>5: XB-200 add-on control</h3>
@ -86,15 +77,33 @@ This controls the optional XB-200 add-on when it is fitted to the BladeRF main b
- **144M**: The signal is routed through the 144 MHz filter - **144M**: The signal is routed through the 144 MHz filter
- **222M**: The signal is routed through the 222 MHz filter - **222M**: The signal is routed through the 222 MHz filter
<h3>6: Device sample rate</h3> <h3>6A: Host to device sample rate / Baseband sample rate input toggle</h3>
This is the BladeRF device DAC sample rate in S/s. Use this toggle button to switch the sample rate input next (6) between host to device sample rate and baseband sample rate input. The button shows the current mode:
- **SR**: host to device sample rate input mode. The baseband sample rate (2) is the host to device sample rate (6) divided by the interpolation factor (7).
- **BB**: baseband sample rate input mode. The host to device sample rate (2) is the baseband sample rate (6) multiplied by the interpolation factor (7).
<h3>6: Sample rate</h3>
This is the BladeRF device DAC sample rate sample rate or baseband sample rate in samples per second (S/s). The control (6A) is used to switch between the two input modes. The device to/from host stream sample rate is the same for the Rx and Tx systems.
The limits are adjusted automatically. In baseband input mode the limits are driven by the interpolation factor (7). You may need to increase this interpolation factor to be able to reach lower values.
Use the wheels to adjust the sample rate. Left click on a digit sets the cursor position at this digit. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arrows. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2. Use the wheels to adjust the sample rate. Left click on a digit sets the cursor position at this digit. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arrows. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2.
<h3>7: Tx filter bandwidth</h3> <h3>7: Interpolation factor</h3>
This is the Tx filter bandwidth in kHz in the LMS6002D device. Possible values are: 1500, 1750, 2500, 2750, 3000, 3840, 5000, 5500, 6000, 7000, 8750, 10000, 12000, 14000, 20000, 28000 kHz. The baseband stream is interpolated by this value before being sent to the BladeRF device. Possible values are:
- **1**: no interpolation
- **2**: multiply baseband stream sample rate by 2
- **4**: multiply baseband stream sample rate by 4
- **8**: multiply baseband stream sample rate by 8
- **16**: multiply baseband stream sample rate by 16
- **32**: multiply baseband stream sample rate by 32
The main samples buffer is based on the baseband sample rate and will introduce ~500ms delay for interpolation by 16 or lower and ~1s for interpolation by 32.
<h3>8: Variable gain amplifier #1 gain</h3> <h3>8: Variable gain amplifier #1 gain</h3>

15
plugins/samplesource/bladerf1input/readme.md
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@ -60,15 +60,24 @@ This controls the optional XB-200 add-on when it is fitted to the BladeRF main b
- **144M**: The signal is routed through the 144 MHz filter - **144M**: The signal is routed through the 144 MHz filter
- **222M**: The signal is routed through the 222 MHz filter - **222M**: The signal is routed through the 222 MHz filter
<h3>4: Device sample rate</h3> <h3>4A: Device sample rate / Baseband sample rate input toggle</h3>
This is the BladeRF device ADC sample rate in S/s. Use this toggle button to switch the sample rate input next (4) between device sample rate and baseband sample rate input. The button shows the current mode:
- **SR**: device sample rate input mode. The baseband sample rate (1.4) is the device sample rate (4) divided by the decimation factor (5).
- **BB**: baseband sample rate input mode. The device sample rate (1.4) is the baseband sample rate (4) multiplied by the decimation factor (5).
<h3>4: Sample rate</h3>
This is the BladeRF device ADC sample rate or baseband sample rate in samples per second (S/s). The control (4A) is used to switch between the two input modes.
The limits are adjusted automatically. In baseband input mode the limits are driven by the decimation factor (5). You may need to increase this decimation factor to be able to reach lower values.
Use the wheels to adjust the sample rate. Left click on a digit sets the cursor position at this digit. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arrows. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2. Use the wheels to adjust the sample rate. Left click on a digit sets the cursor position at this digit. Right click on a digit sets all digits on the right to zero. This effectively floors value at the digit position. Wheels are moved with the mousewheel while pointing at the wheel or by selecting the wheel with the left mouse click and using the keyboard arrows. Pressing shift simultaneously moves digit by 5 and pressing control moves it by 2.
<h3>5: Decimation factor</h3> <h3>5: Decimation factor</h3>
The I/Q stream from the BladeRF ADC is downsampled by a power of two before being sent to the passband. Possible values are increasing powers of two: 1 (no decimation), 2, 4, 8, 16, 32, 64. The I/Q stream from the BladeRF ADC is downsampled by a power of two before being sent to the baseband. Possible values are increasing powers of two: 1 (no decimation), 2, 4, 8, 16, 32, 64.
<h3>6: Baseband center frequency position relative the the BladeRF Rx center frequency</h3> <h3>6: Baseband center frequency position relative the the BladeRF Rx center frequency</h3>