[MilCom] Bluegill on WBFM

[pdgls via MilCom]

362.250 WBFM 0323z  05/14/2015

Finally learned how to record ultrasound with SDRSharp.
You use NFM not WFM and need to make a change in the SDRSharp config file to increas the sample rate in NFM.
<add key="minOutputSampleRate" value="32000" />
was changed to 
<add key="minOutputSampleRate" value="130000" />
The bandwidth in NFM can now be set to 130000 and covers the entier WBFM signal.
Record audio with the audio record feature while tuned to the WBFM signal (or the baseband recording of it) in NFM mode and then play that audio file back to tune the subcarriers.
I zeroed-out the freq info in audio file name so SDRSharp shows the center of the signal at 0 instead of 362.250


8 Khz subcarrier had the typical orderwire traffic.
24 Khz subcarrier had phone rings and "Go,  Hello"
48 Khz subcarrier had phone rings.

https://www.youtube.com/watch?v=9i0mGtu34m4

Paul, near Sacramento California