[USRP-users] TwinRx transfert function

Olivier Ravard olivier.ravard at novagrid.com
Wed Nov 6 06:31:17 EST 2019


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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