[ibis-macro] Re: "Final Draft" of the Jitter BIRD 123.2 that I would like reviewed in preperationg for submitting to the Open Forum
- From: <fangyi_rao@xxxxxxxxxxx>
- To: <wkatz@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
- Date: Mon, 11 Apr 2011 15:30:18 -0600
Hi, Walter;
Thanks for the updated BIRD. Can you clarify following questions regarding the
new jitter parameters?
1. When Rx_Clock_Recovery_DCD and Rx_DCD are both present, is the total
DCD expected to have all values of the four combinations (i.e. +/-
Clock_Recovery_DCD +/- Rx_DCD), or just two values of +/-( Clock_Recovery_DCD +
Rx_DCD)?
2. For Rx_Noise_Pad, it's defined as "noise at input to a receiver
buffer". From simulation point of view, does it mean in the input to the
Rx_GetWave?
3. Average noise power = (noise spectral density)^2*bandwidth. What is
the bandwidth associated with Rx_Noise_Pad?
Regards,
Fangyi
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Walter Katz
Sent: Monday, April 11, 2011 12:17 PM
To: IBIS-ATM
Subject: [ibis-macro] "Final Draft" of the Jitter BIRD 123.2 that I would like
reviewed in preperationg for submitting to the Open Forum
All,
I have reviewed the comments made so far on BIRD 123 and 123.1, and have update
the BIRD (enclosed) to address these issues. All changes since the original
BIRD 123 are in Red.
I explained what is Sj when there is no Sj_Frequency (It is Sj at any
frequency).
I did not explain what an EDA is to do with these because they describe the
impairment, not how to apply it. Each EDA tool can apply the impairment that
the User or Model asked the EDA tool to apply either to the inputs or the
outputs of the model at the EDA tools discretion. So questions on each of these
parameters should be limited to what the impairment is. I will be happy to
answer what are some of the possible ways an EDA tool can use, but not what an
EDA tool should or must do.
Finally, I added a new parameter Rx_External_Reference which allows model
makers to create Rx AMI_GetWave models that accept *clock_times as an input
that contains the clock times of an externally generate reference clock for the
Rx Clock Data Recovery file. With this new enhancement the User can direct the
EDA tool to generate both ANY Jitter distribution as input to the Tx
AMI_GetWave and ANY Jitter distribution as input to the Rx CDR.
Walter
Walter Katz
wkatz@xxxxxxxxxx<mailto:wkatz@xxxxxxxxxx>
Phone 303.449-2308
Mobile 720.333-1107
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