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ADF4157 Digital Lock Detect problem

Ellie_El
on Feb 12, 2019

Hi,

I have a ADF4157 with the configuration shown in this screenshot

when I probe the output signal with the spectrum analyzer I can see a clean spectrum, however the Digital Lock Detect is not asserted at the MAXOUT pin. Any idea what config has been missed.

I've also attached the Analog Lock Detect.

Thanks

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