Search found 4 matches

by mike_haben
Thu Oct 12, 2017 9:56 am
Forum: SDRplay related
Topic: Gain range - again!
Replies: 1
Views: 316

Re: Gain range - again!

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, ...
by mike_haben
Wed Oct 11, 2017 8:22 am
Forum: SDRplay related
Topic: Gain range - again!
Replies: 1
Views: 316

Gain range - again!

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 freque...
by mike_haben
Tue Oct 10, 2017 3:44 pm
Forum: SDRplay related
Topic: IFGR range - why 20 - 59 not 0 - 59?
Replies: 1
Views: 183

Re: IFGR range - why 20 - 59 not 0 - 59?

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 t...
by mike_haben
Tue Oct 10, 2017 2:08 pm
Forum: SDRplay related
Topic: IFGR range - why 20 - 59 not 0 - 59?
Replies: 1
Views: 183

IFGR range - why 20 - 59 not 0 - 59?

Please can someone tell me why the minimum value for IFGR allowed by SoapySDRPlay is 20 rather than 0?

Thank you,
Mike H.

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