Steve,
I agree with John on the CITS Polar being the way to go.
Our board's includes about 60-70% impedance and the new Polar has been
outstanding compared to our old Tex/TDR machine.
FYI,
I also believe a few OEM's are requiring board houses to test on the CITS to
meet their spec's..
Good Luck,
John Walker
Pro-Tech

----- Original Message -----
From: Steve Underwood <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 14, 2000 1:49 PM
Subject: [TN] impedance testing... the question


> Hello Technetters,
>
> We are a small shop building primarily prototype quickturn commercial
> and military medium technology product.
>
> We use an impedance calculator from Polar and a tdr to verify impedance
> on coupons from the same panel.  The coupons reflected the impedance
> design with a 7 inch trace.  This has worked will for us.
>
> Now we are at a point where we need to repair the tdr or move toward
> another system of testing.
> I've thought about Polar's CITS and the system from Introbotics...
>
> The question...
>
> What experiences has anyone had with the CITS and/or Introbotics versus
> using a tdr?
> What other methods are out there for verifying impedance on a printed
> circuit board (bare board) in a manufacturing environment?
>
> Any input is appreciated,
>
> Thank you and have a Great Holiday!
>
> Steve Underwood
> Engineering Manager
> Circuit Center, Inc.
> 937-435-2131 ext. 127
> [log in to unmask]
>
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