does somebody now, how it is the easiest way to connect the board to an ext. vco and active loop?
On the EVAL-ADF4158EB1Z board, you can remove the on-board filter, connect the charge pump signal to the input of the external loop filter and then bring the output of your external VCO back in on the RFout signal.
This should do it. Let me know if you've any problems.
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