[ibis-macro] Re: AMI_Flows_6.pdf for today's ATM teleconference

  • From: Ambrish Varma <ambrishv@xxxxxxxxxxx>
  • To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
  • Date: Tue, 20 Apr 2010 15:10:57 -0700

Hi Walter,
I don't believe the spec ever mentions that the input to Rx_Init is always 
hAC(t) X hTEI(t). In fact, quite the contrary -


| Step 2. The output of Step 1 is presented to the TX model's AMI_Init

| call. If Use_Init_Output for the TX model is set to True, the

| impulse response returned by the TX AMI_Init call is passed

| onto Step 3. If Use_Init_Output for the TX model is set to

| False, the same impulse response passed into Step 2 is passed
 |     on to step 3.


| Step 3. The output of Step 2 is presented to the RX model's AMI_Init

| call. If Use_Init_Output for the RX model is set to True, the

| impulse response returned by the RX AMI_Init call is passed

| onto Step 4. If Use_Init_Output for the RX model is set to

| False, the same impulse response passed into Step 3 is passed
| on to step 4.

This is what Arpad presented today.
-Ambrish.


________________________________
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] 
On Behalf Of Walter Katz
Sent: Tuesday, April 20, 2010 5:27 PM
To: Arpad_Muranyi@xxxxxxxxxx; IBIS-ATM
Subject: [ibis-macro] Re: AMI_Flows_6.pdf for today's ATM teleconference

Arpad,

In the IBIS 5.0 specification:


|               Use_Init_Output:

|

|               Use_Init_Output is of usage Info and type Boolean.  When

|               Use_Init_Output is set to "True", the EDA tool is

|               instructed to use the output impulse response from the

|               AMI_Init function when creating the input waveform

|               presented to the AMI_Getwave function.

|

|               If the Reserved Parameter, Use_Init_Output, is set to

|               "False", EDA tools will use the original (unfiltered)

|               impulse response of the channel when creating the input

|               waveform presented to the AMI_Getwave function.

|

|               The algorithmic model is expected to modify the waveform in

|               place.

|

|               Use_Init_Output is optional. The default value for this

|               parameter is "True".

|
|               If Use_Init_Output is False, GetWave_Exists must be True.

In what was agreed to in November, the input the Rx_Init was always hAC(t) X 
hTEI(t).
In what you presented this week, the input to Rx_Init is either hAC(t) or 
hAC(t) X hTEI(t), depending on the value of Tx Use_init_Output. I believe based 
on the IBIS 5.0 specification above that the November flow is correct and the 
Spec. correction flow that you presented this week is incorrect.

Walter


Walter Katz

303.449-2308

Mobile 720.333-1107

wkatz@xxxxxxxxxx

www.sisoft.com

-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx 
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of Muranyi, Arpad
Sent: Tuesday, April 20, 2010 12:48 AM
To: IBIS-ATM
Subject: [ibis-macro] Re: AMI_Flows_6.pdf for today's ATM teleconference

Here is the AMI_Flows_6.pdf file once again.  I made
the changes which were suggested to me in the last ATM
meeting.  This flow includes only the correction we
wanted to make on the existing spec flow.

I am not sure what the decision was about the last two
slides which deal with the Rx pad waveform.  Did we
say we would delete these slides altogether and not
address this capability in this BIRD?  As far as I can
tell, we can't achieve this flow without deconvolution...

Please familiarize yourselves with these slides, because
I would like to achieve closure on this flow in the ATM
teleconference tomorrow.  Comments are welcome before or
at the meeting.

Thanks,

Arpad
=========================================================

________________________________
From: Muranyi, Arpad
Sent: Tuesday, April 13, 2010 1:39 PM
To: 'IBIS-ATM'
Subject: AMI_Flows_6.pdf for today's ATM teleconference
For those who are unable to join the meeting via
LiveMeeting, here is a new flow diagram to aid the
discussion on the subject.

Arpad
==================================================

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