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Gnuradio error with FMCOMMS board and ZC706

Question asked by jimtd on Oct 11, 2015
Latest reply on Oct 13, 2015 by pcercuei

Hi -

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?