Re: [Discuss-gnuradio] calibrating USRP

[Marcus Leech]

Indeed, the only way to do this is to use a signal generator with known power levels, and precision attenuators.  You'll have to repeat the process over the full tuning range of the device(s) in question, since
 effective gain will change a little with tuned frequency--that's just a natural property of analog RF components.  The gain will also change (a little) with ambient temperature as well, so it depends on how precise you want your calibrations to be.

 

 

 

on Jun 03, 2013, Nemanja Savic <address@hidden> wrote:

Hi all guys (yet again),

I have a question about calibrating received power level of my USRP, equipped with wbx, lftx and lfrx.

I am not sure whether it is apropriate to discuss that here.

Basically I would like to be able to determine absolute power level I am receiving. I suppose that basic procedure for doing this would be using super precise, expensive signal generator. Then tracing signal of know power to daughter board and measure power level in fft sink. And maybe also doing this for complete band of daughterboard usage. If the previous is correct, than I would like to ask you, how do you store calibrating data, inside .h file or ...?

Best and thank you,

--
Nemanja Savić

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