Noise Figure USRP2+WBX receiver

GNU Radio
1

Dear all,

I’m using USRP2 with WBX.
I have a question about the dynamic of the Noise Figure of this device.
On Ettus site,it is possible to download the file in attachment about
the noise figure.
I don’t know if this graphic is referred to USRP1+WBX or USRP2+WBX.
If it’s referred to USRP2+WBX why the range of gain is [0-50]dB?
Is the maximum gain of USRP2+WBX=31,5dB?

Thanks in advance!

Regards
Claudia

2

Have you noticed that there is additional gain on the WBX grand-daughter
board? But the 50 dB range is still a mystery to me because there’s not
additional attenuation on the grand-daughter board.

Darol Klawetter