'gr-sdrplay3' module changes to defaults for AGC, DC offset correction, IQ imbalance correction

[fventuri]

This topic is to discuss changing the defaults for AGC, DC offset correction, IQ imbalance correction in the 'gr-sdrplay3' module to be consistent with other SDRplay applications like SDRconnect and SDRuno.

These are the exact changes that would be implemented (depending on the feedback):

• IF AGC: the current default is disabled; it would be changed to enabled (with a speed of 50Hz)
• DC offset correction loop: the current default is disabled; it would be changed to enabled
• IQ imbalance correction loop: the current default is disabled; it would be changed to enabled

I imagine the choice between these options would depend on your use case for the 'gr-sdrplay3' OOT module. If you use GNU Radio and this module as a receiver to listen to a radio station, you might prefer having these useful features enabled by default; if you instead use your SDRplay RSP with GNU Radio for research and measurement purposes, you might prefer to leave the defaults unchanged.

You comments, suggestions, and ideas for improvement are most welcome!

[fventuri]

A few days ago I pushed the proposed changes to the defaults for AGC, DC offset correction, and IQ imbalance correction to the change-defaults branch: https://github.com/fventuri/gr-sdrplay3/tree/change-defaults

Franco