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ADF5355 Eval-board software: is it possible to select the VCO?

Question asked by matse_ on Jun 24, 2015
Latest reply on Jun 29, 2015 by MRichardson

Hello everybody,


I am trying to use the EVB with an external phase detector and loop filter (OPAMP based). So far, it seems like the PFD works correctly with the N Devider Output of the EVB. But the PLL doesnt lock.

I have tried to synthesize a frequency of 6GHz, but the VCO Output frequency was around 3 GHz. I guess there is an internal VCO selection that is not compatible with using external devices.

So my question is: Is there a possibility to select the VCO manually with the help of the evaluation board software ?


thanks in advance and best regards,