SoapySDR gain control

[Luca Colombo]

Hello,

I experiencing the gain control of my LimeSDR USB3.0 using SopaySDR in Pothos.

It works in a range from 0 to 60 dB.

Just one question about the implemenation.

Lime SDR has a 3 stage amplifiers

with these ranges

Does SoapySDR Source controls automatically the three amplifier's in a transparent mode for the user?

Thanks

Luca

[Josh Blum]

Does SoapySDR Source controls automatically the three amplifier's in a transparent mode for the user?

Yes, the single entry gain value directly controls the single entry gain setting in the LMS7002M driver:

https://github.com/myriadrf/LimeSuite/blob/master/SoapyLMS7/Settings.cpp#L281

So that should set all 3 gains from a single value.

However, for specific details, you will have to look into the LimeSuite code base to see exactly how lms7Device->SetGain() is implemented

-josh

Thanks

Luca

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[Luca Colombo]

@Josh, thanks a lot!!

I'll go to check the source code too.

L.