[Discuss-gnuradio] GRC+USRPx file sink problem

[David Evans]

Hi,

GRC Setup (used with RFX and WBX cards)...

USRP1 ---to---> FFT Graphical sink (shows signal spectrum as expected)
     and  ---to---> Complex to IShort -----to----> File Sink (signals are 
dumped 
to disk as expected)

USRP2 ---to---> FFT Graphical sink (shows signal spectrum as expected)
     and  ---to---> Complex to IShort ----to----> File Sink (******file is all 
zeros******)

Tried with 3.3.0 and git 3.3.1, and on three different installations/USRPs. 
Basically zero output with USRP2.
USRP2 works fine with python scripts eg, usrp2_fft.py with --output-shorts.

Any ideas please?

Dave