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PAC simulation issue, "No valid time points are specified"

I am facing a problem with pac simulation. This is the error that I see.

ERROR (SPCRTRF-15168): No valid time points are specified for the sampled analysis `pac'. The analysis is skipped.
To fix the problem, please verify that: 1) Threshold value is within the range of probed signal. 2) Additional timepoints are specified less than the fundamental period.

It doesn't make sense because,
The threshold value that I set is at 0.5*VDD so it is within the range of probed signal (verified with pss plot).
I don't have any additional timepoints specified.

Is there any other reason why this could be happening?

venkmanbuster over 4 years ago

Just to be clear, this is in Cadence Virtuoso Spectre simulator.
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Andrew Beckett over 4 years ago in reply to venkmanbuster
Please provide:

The Spectre version you're using

The analysis statements from the spectre netlist so I can see how it's been specified

The plot of the signal being used as the trigger for the PAC analysis (from the time-domain PSS results). Please also make it clear how you've plotted that.

Andrew
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venkmanbuster over 4 years ago in reply to Andrew Beckett

I figured out the reason,

It has some issue with nport and Spectre X simulator. It worked with an older spectre version with APS.
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Andrew Beckett over 4 years ago in reply to venkmanbuster

That sounds odd. I hope you've reported it to customer support (or maybe it's already fixed in the latest versions?)

Andrew
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