Re: [SI-LIST] : matched delay

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From: Michael Nudelman (mnudelman@tellium.com)
Date: Tue Nov 21 2000 - 06:08:53 PST


Yeah, I meant - 120 mils - 20ps. This is what happens to people in early
mornings.

David Instone wrote:

> Michael Nudelman wrote:
> ....snip....
> > Then take your skew number, which
> > is roughly 6 inches per ns, or 6 mils per ps.
>
> Agreed
>
> > So, every, say, 20 mils
> > traces' skew will give you 120 ps signal skew.
>
> Having frightened the life out of me, because FC only allows 25ps of
> skew at the TX, I then realised your maths were a tad off! 20 mils
> equates to 20/6 ps, not 20*6 ps so your 120ps would take 120*6 mils
> which is 0.72 inch.
>
> Oh well, we all have bad days.
> --
> Regards
>
> Dave Instone. Compliance Engineer
> Test Systems, MP24/22
> Xyratex, Langstone Rd., Havant, Hampshire, P09 1SA, UK.
> Tel: +44 (0)23-92-496862 (direct line)
> Fax: +44 (0)23-92-496014
> http://www.xyratex.com Tel: +44 (0)23-92-496000

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