[ibis-macro] Re: Question about Model Specific parameters

  • From: Mike Steinberger <msteinb@xxxxxxxxxx>
  • To: ibis-macro@xxxxxxxxxxxxx
  • Date: Thu, 17 Feb 2011 09:42:56 -0500

 Arpad-
Please find attached a copy of our DesignCon2008 paper on AMI modeling. Among other things, this paper describes the use of parameters of Usage Out to monitor the adaptive loops in receivers. In point of fact, every receiver model that SiSoft writes (and most will admit that's a fair few) reports the behavior of its adaptive loops in exactly this way. Furthermore, many users of SiSoft's Quantum Channel Designer use this data to obtain valuable information about their systems.
Even at the last IBIS Summit, there were two presentations on channel optimization that reported the application of parameters of Usage Out and InOut.
If you want to know how all this is done, Mike LaBonte's explanation is right on target..
Given that so much information has been publicly and widely available since before IBIS 5.0 was ratified, how is it that you came to conclude that "no EDA vendor has the knowledge on how to interpret or post process these returned parameters"? 

Mike S.

On 2/16/2011 7:02 PM, Muranyi, Arpad wrote:

Hello everyone,

I stumbled on a situation with an .ami file which has
a few Model Specific parameters of Usage InOut.  Our
customer is wondering why we don't do this and that
with the data that is returned by the model in those
parameters.  This triggers the following thoughts in
my mind.

Model Specific parameters are specific to the model and
their meaning is not described by the AMI specification.
Therefore no EDA vendor has the knowledge on how to
interpret or post process these returned parameters
because there is simply no way of knowing what to do
with them.

For this reason, I would suggest that we make a rule in
the IBIS AMI specification that Model Specific parameter
must be Usage In, and Usage Out or InOut should not be
allowed.

Any Comments?

Thanks,

Arpad
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