WBX: receive signal is too low

Hi,

I have a WBX daughterboard that is not functioning properly. The
received signal frequency is OK but amplitude is very very low.

I swapped it with another WBX and signal amplitude is good. This shows
that USRP board is fine.

Used both TX/RX and RX2 ports, but no avail.

Any idea what is wrong here.

Thanks,

Khalid.