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András Retzler 2015-11-08 15:36:25 +01:00
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@ -40,7 +40,7 @@ A raw audio file differs from a .wav file because it doesn't have any headers to
* It's the matter of the filter which sideband do we select:
* `csdr bandpass_fir_fft_cc -0.1 0` is the lower sideband
* `csdr bandpass_fir_fft_cc 0 0.1` is the upper sideband
* I have experienced that if the SSB signal is in the center of the I/Q signal, then it won't be okay, so I shift it a bit. So the exact frequency should be around: `rpitx frequency + 48000*0.2 = rpitx frequency + 9600 Hz`
* I have experienced that if the SSB signal is in the center of the I/Q signal, then it is not transmitted correctly. The solution was to shift it. So the exact frequency should be around: `rpitx frequency + 48000*0.2 = rpitx frequency + 9600 Hz`
**Generate NFM modulation:**