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IFGR range - why 20 - 59 not 0 - 59?
Posted: Tue Oct 10, 2017 2:08 pm
Please can someone tell me why the minimum value for IFGR allowed by SoapySDRPlay is 20 rather than 0?
Re: IFGR range - why 20 - 59 not 0 - 59?
Posted: Tue Oct 10, 2017 3:44 pm
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:
This function provides a mechanism to extend the normally useful IF gain reduction range to include values less than 20dB when using mir_sdr_RSP_SetGr(). It is not recommended to use the extended range as it is likely to overload to produce signal levels that will overload the ADC input.
Hope this might save time for others in the future...