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Finally worked it out - I need to use the LNAstate parameter of mir_sdr_RSP_SetGr() to switch the LNA and mixer gains. The API Specification document would be less confusing if the Gain Reduction Tables were not in a completely separate section (or even document!) from the functions they relate to, ...
OK, a variant on my previous question: Why does mir_sdr_RSP_SetGr() error out on values of gain-reduction parameter gRdB above 59? The "Default Gain Tables" document lists internal settings of baseband gain-reduction, mixer GR and LNA GR for gRdB up to 102, 85 or 83 depending on the frequency-band. ...
- Tue Oct 10, 2017 3:44 pm
- Forum: SDRplay related
- Topic: IFGR range - why 20 - 59 not 0 - 59?
- Replies: 1
- Views: 1666
After digging through some docs and code, answered the question for myself - in the "SDR API specification" document, section 3.37 on function mir_sdr_RSP_SetGrLimits() answers it indirectly: <QUOTE> This function provides a mechanism to extend the normally useful IF gain reduction range to include ...