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pothosware / SoapyAirspy

Soapy SDR plugin for the Airspy
https://github.com/pothosware/SoapyAirspy/wiki
MIT License
25 stars 13 forks source link

Allow adjustment of IF bandwidth. #22

Open darksidelemm opened 4 years ago

darksidelemm commented 4 years ago

After some interesting discussions with the Airspy developer on Twitter, he pointed at some source code from LinRad which provides information on what registers to set (using airspy_r820t_write) to adjust the R820T2's IF bandwidth.

See here for the register values (and corresponding bandwidths): https://sourceforge.net/p/linrad/code/HEAD/tree/trunk/airspy.c#l383 and here for the register addresses: https://sourceforge.net/p/linrad/code/HEAD/tree/trunk/airspy.c#l968

Allowing adjustment of IF bandwidth gives another lever to adjust in optimising receive performance. It would be nice if all the R820T2 registers were documented somewhere, but I suspect the full documentation is only available under NDA, so making use of what information is available from other open source projects will have to do!

I guess the SoapySDR set/listBandwidth functions would be the correct place to expose these settings?

guruofquality commented 4 years ago

Sounds right, can you make a PR?