Gary,
I asked this same question 6 months ago and most people told me that it was
the additional spacing that helped, not the guard band itself.

Pat Paulson




Rick Wilson <[log in to unmask]> on 09/15/98 12:52:41 PM

Please respond to "DesignerCouncil E-Mail Forum."
      <[log in to unmask]>; Please respond to Rick Wilson
      <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: Pat Paulson/AUS/VTEL)
Subject:  Re: [DC] Guard Banding




Gary,
It is my understanding that guard bands don't work. I think your theory
that
it is the spacing that does the trick is probably correct.
Rick Wilson
[log in to unmask]


        -----Original Message-----
        From:   Gary Boccoleri [SMTP:[log in to unmask]]
        Sent:   Tuesday, September 15, 1998 12:48 PM
        To:     [log in to unmask]
        Subject:        [DC] Guard Banding

        Good Morning

        Can anyone help me with information on guard banding. I'm talking
about
        shielding a trace by circling it with a ground trace. This has come
up
        as a way to solve all of our EMI problems. I'm of the opinion that
the
        additional spacing it requires is what helps to prevent crosstalk
and
        the ground traces just take up space.

        If anyone has any opinions on this (pro or con) or can point me at
some
        resources on the subject I would appreciate it.

        Thanks




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