DSDPlus FMP24 IQ file format

[boatbod]

Can anyone advise what file format DSD+FL FMP24 uses to save raw IQ files?
Thanks

 

[cg]

It is simply called xxxxx.IQ

 

[boatbod]

It is simply called xxxxx.IQ

Sure, but how is the IQ data formatted in the binary file?

e.g. 32 bit floats sequenced IQIQIQIQ...

 

[slicerwizard]

A one second recording is about 5 MB, which suggests 8 bit data.

Opening it in GoldWave as "raw PCM unsigned 8 bit, stereo" produces this:



It's a phase modulated P25 control channel, so based on the magnitude shifts, that would be one symbol's worth of raw I/Q?

 

[boatbod]

Thank you slicer