What is an IQ file and how can I use it?
Is there a difference between an IQ file and a WAV file? When I record in iq mode, it saves a file named ....iq.wav, which gives me the impression that this is an iq file in a .WAV format. I want to use some third party software to extract information from this file, particularly the modulation index.
Using GNURadio and the information at https://charlesreid1.com/wiki/Gnuradio/Wav_to_Waterfall, I can listen to the WAV File Source and I can see the waterfall displayed. My diagram looks like this:
However, can I also do things like display the carrier wave and ultimately measure the modulation index given this wav file?
Using GNURadio and the information at https://charlesreid1.com/wiki/Gnuradio/Wav_to_Waterfall, I can listen to the WAV File Source and I can see the waterfall displayed. My diagram looks like this:
However, can I also do things like display the carrier wave and ultimately measure the modulation index given this wav file?
Comments
I don't know GNURadio myself, but I think your diagram above is missing an AM demodulator before the mod index block. So change that second path going to the audio sink block with one that looks like: