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FMCOMMS5 External LO Input Level

Question asked by wpearson on May 22, 2015
Latest reply on Jun 10, 2015 by tlili

We are seeing odd behavior, especially around LO frequencies of 210MHz to 240MHz that require what seem to be excessive drive levels (+8dBm) to allow the 9361s to function properly.  There are some frequencies where there appears to be only ~1dB of tolerance and others where I have 20dB of tolerance.  Is this a problem with the INPHI chip? 

 

There is no documentation on the expected input level for the FMCOMMS5 external LO input.  Does this vary over frequency?  Please advise.

 

Thanks.

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