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FMCOMMS1 System Gain

Question asked by Mel on Oct 23, 2014
Latest reply on Oct 28, 2014 by charlyelkhoury

Good afternoon,


I have an FMCOMMS1 and ZC702 eval board.  The typical gain I see in the overall system is about -8dBm.  I usually put 0 dBm on the input and see -8dBm on the output.  We have several boards and they usually behave the same way.  We have one board that looks like it saturates at 0dBm input.  We put it at -40dBm input and get -25dBm output.  This is with the same FW/SW load going into both sets.  Has anyone seen a gain discrepancy like this before?