[SI-LIST] Re: Still looking for input ....

Todd,

Maybe the silence is an admission of lack of knowledge.  In my dealings with 
various hardware designers, some of them want the measurements done one way or 
the other, but the reason is usually something like, "That's the way RJ always 
does it."  From all my understanding, I believe that the correct method is to 
measure at the logic thresholds.  This statement also assumes that we've done 
our very best to correctly model all the parts of our circuit that we can.  If 
the circuit works correctly at the corner cases then it's almost guaranteed to 
work over the range of manufacturing tolerances.  Measuring to one reference 
voltage at the receiver doesn't tell you anything about the performance of the 
circuit after manufacturing.

Later,
Weston


-----Original Message-----
From: Todd Westerhoff [mailto:twester@xxxxxxxxxxx]
Sent: Thursday, January 31, 2002 8:18 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Still looking for input ....



Okay, folks ...

So far we've seen two posts to my question of how flight times are measured.

Since we've seen substantial discussion recently on questions related to
higher education and Physics 101, I was REALLY hoping to see some more
discussion on this particular SI issue.

One line responses with a vote are fine.  One line responses saying "your
question doesn't make sense!" are even OK.  But silence is NOT golden in
this case.

Thanks!

Todd.

Todd Westerhoff
SI Engineer - Hammerhead Networks
5 Federal Street - Billerica, MA - 01821
email:twester@xxxxxxxxxxx - ph: 978-671-5084
============================================

"Oh, but ain't that America, for you and me
 Ain't that America, we're something to see
 Ain't that America, Home of the Free
 Little pink houses, for you and me"

- John Mellencamp


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