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ac2cz / FoxTelem

AMSAT Fox-1 Telemetry Decoder
GNU General Public License v3.0
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Does the Load wav IQ support recorded band IQ from SDRUno? #429

Open milenb opened 6 years ago

milenb commented 6 years ago

I made a DUV and a High Speed recording of AO-92 using SDRUno 1.21. When I play the recording in SDRUno and select a 20kHz FM slice and forward the audio through VAC to Foxtelem, it decodes both passes just fine. However if I try to load the same recording into Foxtelem and play it, there are no frames being decoded. The recording covers about 250kHz of bandwidth (2MHz with 8 decimation). I don't know if there's something wrong with my settings or if such recordings are perhaps currently not supported.

I tried different settings and as best as I can tell, the software reads the file ok and finds the signal but doesn't decode anything for some reason. Please see here:

2018-01-14 1

I can provide links to the recordings if needed.

ac2cz commented 6 years ago

Hi milenb, thanks for logging an issue here.

Right now IQ wav files don't support any bandwidth other than 192k. You have to play other recordings back through the program you used to record them and feed the audio to FoxTelem, as you have done.

I agree it would be nice to support arbitrary bandwidths and some of that work is being done in the background to support other SDRs. That could be extended to support Wav files once it is implemented. I will mark this as a potential Enhancement rather than as a defect.