[ibis-macro] Re: Init_Returns_Impulse
- From: "Walter Katz" <wkatz@xxxxxxxxxx>
- To: <gedlund@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 30 Apr 2013 15:02:53 -0400 (EDT)
Greg,
The EDA tool should never convolve the output of the Init function with
the output of the GetWave function. This would double count the
equalization.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Gregory R Edlund
Sent: Tuesday, April 30, 2013 2:50 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Re: Init_Returns_Impulse
Thank you, Walter & Ambrish.
I understand the bit about Init_Returns_Impulse = TRUE being necessary for
statistical simulation (at least on a rudimentary level).
If both these parameters are set to TRUE and we're doing time domain
simulation, is there any possibility that the simulator might apply
equalization twice? Of does the simulator get to pick which way to apply
equalization in this case?
Greg Edlund
Senior Engineer
Signal Integrity and System Timing
IBM Systems & Technology Group
3605 Hwy. 52 N Bldg 050-3
Rochester, MN 55901
Inactive hide details for "Walter Katz" ---04/30/2013 01:35:01
PM---Greg,"Walter Katz" ---04/30/2013 01:35:01 PM---Greg,
From: "Walter Katz" <wkatz@xxxxxxxxxx>
To: Gregory R Edlund/Rochester/IBM@IBMUS, <ibis-macro@xxxxxxxxxxxxx>
Date: 04/30/2013 01:35 PM
Subject: [ibis-macro] Re: Init_Returns_Impulse
Sent by: ibis-macro-bounce@xxxxxxxxxxxxx
_____
Greg,
If Init_Returns_Impulse = TRUE, then the IR output if Init contains the
impulse response of the channel modified by the equalization of the model.
This is independent of the GetWave_Exists = True or False.
If GetWave_Exists = TRUE, then the waveform output of GetWave is the input
to GetWave modified by the equalization of the model. This is independent
of the Init_Returns_Impulse = True or False.
Walter
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Gregory R Edlund
Sent: Tuesday, April 30, 2013 2:15 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] Init_Returns_Impulse
If Init_Returns_Impulse = TRUE and GetWave_Exists = TRUE, what is GetWave
supposed to do? It can't do any equalization, right? Equalization is
happening in Init if Init_Returns_Impulse = TRUE.
Thanks in advance.
Greg Edlund
Senior Engineer
Signal Integrity and System Timing
IBM Systems & Technology Group
3605 Hwy. 52 N Bldg 050-3
Rochester, MN 55901
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