Tool/software:
Hello,
I'm seeking clarification on recommended settings for Input Reference Validations for 1PPS input. Assuming no other reference input (ie no Secref).
It's clear that 1PPS Phase Detector is required, and Frequency Detect Threshold, Early Window Detector, and Late/Missing Window Detector need to be disabled.
In the default 1PPS config, the Validation Timer is enabled, as shown below.
However it's unclear whether Validation Timer or Amplitude Detector are allowed, and if so, whether they are recommended. I understand that for <5MHz Reference Input (1PPS in this case), CMOS slew rate detector should be used instead of the Amplitude detector. Does enabling either of these validation settings help improve the PLL locking, or should we think of them more as "input quality" checks that could help us determine if a reference input is out-of-spec, lost, etc.?
I've highlighted lines in the following photos that led to uncertainty. Thank you
