Brent,

Good idea.  I have used making tape to form a thick collar around the cable
insulation.  This takes time, but provides very repeatable measurements
(positioning).

I did this with a Fischer F-2000 probe, which has a small diameter hole.

Jim
________________________________________________________
Dr. Jim Knighten                e-mail: jim.knigh...@sandiego.ncr.com
<mailto:jim.knigh...@sandiego.ncr.com>  
Senior Consulting Engineer
NCR
17095 Via del Campo
San Diego, CA 92127             http://www.ncr.com <http://www.ncr.com>  
Tel: 858-485-2537
Fax: 858-485-3788

***** Notice the Area Code change from 619 *****


        -----Original Message-----
        From:   Brent DeWitt [SMTP:bdew...@ix.netcom.com]
        Sent:   Monday, June 21, 1999 12:48 PM
        To:     Lacey,Scott; 'Jim Eichner'
        Cc:     emc-p...@majordomo.ieee.org
        Subject:        RE: Current probe problem


        Wrapping a strip of bubble pack around the cable a few time is also
an easy
        way to keep it centered in the clamp.

        Brent

        > -----Original Message-----
        > From: owner-emc-p...@majordomo.ieee.org
        > [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Lacey,Scott
        > Sent: Monday, June 21, 1999 11:47 AM
        > To: 'Jim Eichner'
        > Cc: 'emc-p...@majordomo.ieee.org'
        > Subject: RE: Current probe problem
        >
        >
        >
        > In my opinion, letting the cable insulation touch the probe body
        > is never a
        > good idea. I always try to "shim" the cable and probe in order to
        > center the
        > cable within the probe opening. The trick is to keep the shims
outside of
        > the probe. A good trick is to make a "V block" out of wood, with a
deeper
        > center notch for the probe body. This insures good radial and
axial
        > alignment (for consistency) and also prevents the probe body from
touching
        > the ground plane.
        > Scott


        ---------
        This message is coming from the emc-pstc discussion list.
        To cancel your subscription, send mail to majord...@ieee.org
        with the single line: "unsubscribe emc-pstc" (without the
        quotes).  For help, send mail to ed.pr...@cubic.com,
        jim_bac...@monarch.com, ri...@sdd.hp.com, or
        roger.volgst...@compaq.com (the list administrators).
        

---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "unsubscribe emc-pstc" (without the
quotes).  For help, send mail to ed.pr...@cubic.com,
jim_bac...@monarch.com, ri...@sdd.hp.com, or
roger.volgst...@compaq.com (the list administrators).

Reply via email to