Geoff,

Just for reference, almost everything I am using here I learned long 
after I was out of school, much of it in the last few years.  Since 
it has been over 50 years since I graduated, I essentially have to 
re-learn everything, but with the Interrnet I can find good (and bad) 
references on almost any subject I need.

Regarding poles and zeros I have written a lot of stuff and made 
Excel worksheets.  Preparing those is my way to make sure I 
understand what I'm thinking about.  If I can explain something in 
writing then it's possible that I understand it.  Most of those 
documents I use for my own reference as I can hardly ever remember 
the right approach to some computation I worked on a year or two ago.

For the P & Z, it would help if I understood what was your starting 
point.  Circuit? Response function plot? Physical system?  etc? and 
what do you want to end up with?  List of poles and 
zeros?  Normalization factors?  Numbers for a SEED 
header?  etc.?  It's always best when I can just stick to what you 
need and not include a lot of extra stuff that doesn't relate to your problem.

Given some idea of what you're looking for, I might be able to dig up 
something that would be helpful.

Regards,
Brett

At 10:42 AM 10/9/2012, you wrote:

>Wunderbar !
>
>Now if someone might also show us how
>to build a poles and zero file for
>our other programs ????
>
>As a Layman one must rely upon those
>better educated for in depth understandings
>such as these.
>
>
>Best Regards,
>Geoff
>
>
>
>
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