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Updated Using OpenWebRX with a real input signal (markdown)

András Retzler 2016-03-19 21:03:32 +01:00
parent 26dd5f0514
commit dc38c1146e
2 changed files with 12 additions and 13 deletions
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13
Using-OpenWebRX-with-a-real-input-signal.md

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A workaround for this is to convert the real signal into a complex signal, as the DDC routines currently only work for complex input signals. This is no problem as most SDR devices are based on quadrature downconversion.
In this example, we are using an audio card as a VLF SDR:
```
center_freq = 192000 / 2
samp_rate = 192000 / 4
start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr through | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005"
format_conversion = ""
```

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Using-OpenWebRX-with-the-audio-card-as-a-VLF-receiver.md Normal file

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> We have to convert the real signal into a complex signal, as the DDC routines currently only work for complex input signals.
```
center_freq = 192000 / 2
samp_rate = 192000 / 4
start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr through | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005"
format_conversion = ""
```