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102 lines
3.2 KiB
Markdown
102 lines
3.2 KiB
Markdown
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<h1>Test source input plugin</h1>
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<h2>Introduction</h2>
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This input sample source plugin is an internal continuous wave generator that can be used to carry out test of software internals.
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<h2>Build</h2>
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The plugin is present in the core of the software and thus is always present in the list of sources.
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<h2>Interface</h2>
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<h3>1: Common stream parameters</h3>
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<h4>1.1: Frequency</h4>
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This is the center frequency of reception in kHz.
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<h4>1.2: Start/Stop</h4>
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Device start / stop button.
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- Blue triangle icon: device is ready and can be started
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- Green square icon: device is running and can be stopped
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- Magenta (or pink) square icon: an error occured. In the case the device was accidentally disconnected you may click on the icon, plug back in and start again.
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<h4>1.3: Record</h4>
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Record baseband I/Q stream toggle button
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<h4>1.4: Stream sample rate</h4>
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Baseband I/Q sample rate in kS/s. This is the device to host sample rate (3) divided by the decimation factor (4).
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<h3>2: Auto correction options</h3>
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These buttons control the local DSP auto correction options:
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- **DC**: auto remove DC component
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- **IQ**: auto make I/Q balance
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<h3>3: Carrier shift from center frequency</h3>
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Use this control to set the offset of the carrier from the center frequency of reception.
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<h3>4: Decimation factor</h3>
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The I/Q stream from the generator is doensampled 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. This exercises the decimation chain.
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<h3>5: Baseband center frequency position relative the center frequency</h3>
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Possible values are:
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- **Cen**: the decimation operation takes place around the BladeRF Rx center frequency
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- **Inf**: the decimation operation takes place around the center of the lower half of the BladeRF Rx passband.
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- **Sup**: the decimation operation takes place around the center of the upper half of the BladeRF Rx passband.
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This exercises the decimation chain.
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<h3>6: Sample rate</h3>
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This controls the generator sample rate in samples per second.
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<h3>7: Sample size</h3>
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This is the sample size in number of bits. It corresponds to the actual sample size used by the devices supported:
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- **8**: RTL-SDR, HackRF
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- **12**: Airspy, BladeRF, LimeSDR, PlutoSDR, SDRplay
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- **16**: Airspy HF+, FCD Pro, FCD Pro+
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<h3>8: Amplitude coarse control</h3>
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This slider controls the number of amplitude bits by steps of 100 bits.
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<h3>9: Number of amplitude bits</h3>
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This is the signal peak amplitude in number of bits
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<h3>10: Amplitude fine control</h3>
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This slider controls the number of amplitude bits by steps of 1 bit.
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<h3>11: Signal power</h3>
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This is the signal power in dB relative to the maximum power (full bit range).
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<h3>12: DC bias</h3>
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Use this slider to give a DC component in percentage of maximum amplitude.
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<h3>13: I bias</h3>
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Use this slider to give an in-phase (I) bias in percentage of maximum amplitude.
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<h3>14: Q bias</h3>
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Use this slider to give an quadrature-phase (Q) bias in percentage of maximum amplitude.
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