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ADF4351 output does not make sense.

Question asked by cherif.chibane@ll.mit.edu on Aug 24, 2015
Latest reply on Aug 25, 2015 by cherif.chibane@ll.mit.edu

Hello,

 

We have re-span ADI FMCOMMS1 and kept all the layout the same for all components.

When I look at the output of of the ADF4351 we see the plot I am enclosing. It is supposed to be 2.4 GHz. The Lock Detect goes high.

I am also enclosing the LO page of pour schematics. We checked all the power supplies are clean and correct. they both behave the same way.

Can you see anything we are doing wrong?

 

Thanks,

Cherif

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