IFGR range - why 20 - 59 not 0 - 59?
-
- Posts: 4
- Joined: Tue Oct 10, 2017 2:04 pm
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.
Thank you,
Mike H.
Last edited by mike_haben on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
Reason: No reason
-
- Posts: 4
- Joined: Tue Oct 10, 2017 2:04 pm
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 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.
</QUOTE>
Hope this might save time for others in the future...
<QUOTE>
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.
</QUOTE>
Hope this might save time for others in the future...
Last edited by mike_haben on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason
Reason: No reason