[USRP-users] TwinRx transfert function

Olivier Ravard olivier.ravard at novagrid.com
Fri Nov 8 03:56:38 EST 2019


Hello,

Is there anyone to answer this question ? Did someone experience the same 4dB fluctuations
in the 80 MHz bandwidth for acquisitions with TwinRx ?

thanks

Olivier

Le 06/11/2019 à 12:31, Olivier Ravard via USRP-users a écrit :
>
> Hello,
>
> We use X300 with 2 TwinRx boards for acquisitions in L band (UHD 3.10.3).
>
> It seems that the transfert function of the couple (X300 - TwinRx) shows strong
> fluctuations.
> To measure these fluctuations, we put a white noise generator at the input (this
> generator was
> measured before with a spectrum analyser and it show a very flat transfert function over
> 1 GHz)
> and we measure the PSD of the sampled 80MHz bw signal for the 4 inputs.
>
> The result is shown on figures below:
>
> inputs 1 and 2 (first TwinRx):
>
> inputs 3 and 4 (second TwinRx):
>
> Are these fluctuations normal ?
>
> regards,
>
> -- 
> Olivier
>
> _______________________________________________
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> USRP-users at lists.ettus.com
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