[ibis-macro] Re: Question, re: drastic differences between Statistical and Bit-by-bit simulation results.
- From: "Morrison, Casey" <cmorrison@xxxxxx>
- To: "'DBanas@xxxxxxxxxx'" <DBanas@xxxxxxxxxx>, "'ibis-macro@xxxxxxxxxxxxx'" <ibis-macro@xxxxxxxxxxxxx>
- Date: Fri, 6 Apr 2012 19:12:53 +0000
Hi David:
Yes, if there's such a difference then that suggests an issue with the model or
possibly some simulator settings. If the model has a GetWave function, then it
would suggest that GetWave is putting out an all-zero waveform. I know some
models do this until the various adaption algorithms in the RX reach
convergence, at which point they start outputting sensible data. If this were
the case, the model user's guide should have some recommendation for 'ignore
bits', which will basically instruct the simulator to ignore that waveform
data. If the model does not have a GetWave, then that would suggest an issue
with the simulator potentially.
Regards,
Casey
From: David Banas [mailto:DBanas@xxxxxxxxxx]
Sent: Friday, April 06, 2012 01:39 PM
To: 'IBIS-ATM' <ibis-macro@xxxxxxxxxxxxx>
Subject: [ibis-macro] Question, re: drastic differences between Statistical and
Bit-by-bit simulation results.
Hi experts,
If I’ve got a case where a `statistical’ mode simulation produces a reasonable
looking eye, but a `bit-by-bit’ mode simulation of the same circuit produces a
flat line, is that indicative of a particular problem with the models?
Thanks,
David Banas
Sr. Member Technical Staff
Altera<http://www.altera.com/>
+1-408-544-7667 - desk
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