Kumar, On page 188 of IBIS 5.0: | 3.2.2 Arguments | | 3.2.2.1 wave | | A vector of a time domain waveform, sampled uniformly at an interval | specified by the ‘sample_interval’ specified during the init call. The | wave is both input and output. The EDA platform provides the wave. The | algorithmic model is expected to modify the waveform in place by applying | a filtering behavior, for example, an equalization function, being | modeled in the AMI_Getwave call. The waveform in and out of AMI_GetWave is " sampled uniformly at an interval specified by the ‘sample_interval’ specified during the init call" I think this is "uniformly sampled data". So your comment "Your proposal will prevent the eda tool to pass continuous waveform as accurately as possible." Is not logical and does not apply. What did you mean by "Your proposal will prevent the eda tool to pass continuous waveform as accurately as possible." Walter -----Original Message----- From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of ckumar Sent: Thursday, September 29, 2011 10:09 AM To: Arpad_Muranyi@xxxxxxxxxx Cc: IBIS-ATM Subject: [ibis-macro] Re: Samples per bit for AMI there are various ways of "digitizing". You probably meant uniformally sampled data. Your proposal will prevent the eda tool to pass continuous waveform as accurately as possible. On Thu, 29 Sep 2011 13:54:40 +0000, "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx> wrote: > Kumar, > > Regarding: "It does not make any sense for the eda tool to be doing > the part of the models job.", I don't think this is what I am suggesting. > In the computer world there is no such thing as continuous waveform. > Everything is sampled, digitized. I don't see how we can go without > knowing how things are digitized. > > Thanks, > > Arpad > ========================================================================= > > -----Original Message----- > From: ibis-macro-bounce@xxxxxxxxxxxxx > [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of ckumar > Sent: Thursday, September 29, 2011 7:25 AM > To: twesterh@xxxxxxxxxx > Cc: IBIS-ATM > Subject: [ibis-macro] Re: Samples per bit for AMI > > I do not agree. Resampling may part of a adc(analog to digital conversion) > which may be more or less complex. The key part is that the model > should treat the incoming waveform as an analog/continuous waveform > and take it from there. It does not make any sense for the eda tool to > be doing the part of the models job. > > On Thu, 29 Sep 2011 08:10:46 -0400 (EDT), "Todd Westerhoff" > <twesterh@xxxxxxxxxx> wrote: >> I'm with Arpad on this (which should surprise no one). >> >> >> >> This is a practical issue - there are models out there with undocumented >> requirements (e.g. samples per bit) and this is a standardized way of >> documenting those requirements so that users (and tools) can do > something >> about them. The mere act of documenting a requirement should serve >> as a >> hint to the model developer that generalizing the model might be a >> good idea. >> >> >> >> What bothers me most are models that have an undocumented >> requirement, > run >> when that requirement isn't met, but produce incorrect results. >> What's the chance that the user notices a problem and does something >> about it? >> Virtually nil, in my experience. The models that flatline or crash > (I've >> seen both) are actually doing the user a favor. Better to have no > result >> than the wrong one. >> >> >> >> No one is suggesting that having a fixed (or limited) Samples_Per_Bit >> setting is a good idea. We're not promoting bad programming >> practices; we're trying to ensure good simulation results. If others >> are willing > to >> tell system designers to wait while suppliers rewrite algorithmic > models, >> great. Seems silly to me, but maybe their users are more patient >> than mine. >> >> >> >> Todd. > --------------------------------------------------------------------- > IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ > IBIS Macro reflector: //www.freelists.org/list/ibis-macro > To unsubscribe send an email: > To: ibis-macro-request@xxxxxxxxxxxxx > Subject: unsubscribe > > 1 + +^ i 0 Z ? f u p i y h m y b ( {.n + zwZ 隊T艸 + -~ +- + - {.n + --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: //www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: //www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@xxxxxxxxxxxxx Subject: unsubscribe