I am trying to build an arbitrary waveform generator using an FMCOMMS3-EBZ board and a ZC706. I am using the Linux / IIO / Gnuradio software provided on the most recent SD card image (2015_R1_2015_09_04). When I run the 'fm-transmitter.grc' script I get the following message/error:
Unable to write attribute out_voltage0_hardwaregain: -22
Unable to write attribute out_voltage1_hardwaregain: -22
I have tried simplifying the script to the point where I am only using the Signal Source, Type Conversion and FMCOMMS sink blocks, but the error persists. Is there a solution for this?