Lock Error in HMC769 using 20MHz reference

Document created by analog-archivist Employee on Feb 23, 2016Last modified by analog-archivist Employee on Aug 10, 2016
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When using HMC769, its demo board and demo software, I encounter no problem
using inside 50mhz ref.
But if I try the use of 20MHz Ref, Lock error appears. On the other hand the
frequency on spectrum analizer seem OK, Can you help me?


The existing register settings for the p/n as extracted from the software is
shown below:

Recommended Register Settings:

Also, a good reference will be the operation manual on the product page.

This should help.