RE: [SI-LIST] : 75 ohm boards

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From: Larry Miller (ldmiller@nortelnetworks.com)
Date: Fri Jul 28 2000 - 09:11:19 PDT


No info on getting 75 ohm striplines ON PURPOSE <g>.

Our TDR (Tek 11801C w/TDR plugin) reads 75 ohm traces no problem (no special
calibration needed). We sometimes get them accidentally if a vendor does not
do things right.

Larry Miller

> -----Original Message-----
> From: Sean Murray [SMTP:seandm@mmspec.com]
> Sent: Thursday, July 27, 2000 7:07 AM
> To: si-list@silab.eng.sun.com
> Subject: [SI-LIST] : 75 ohm boards
>
> Anyone have any luck hitting 75 ohms +/- 5% stripline with their
> manufacturers? Also when calibrating TDR machines, does one have to
> calibrate with a 75 ohm resistor?
>
> Regards,
> Sean Murray
> General Manager
>
> M&M Specialties Inc.
> 1236 W. Southern Ave. #106
> Tempe, AZ. 85282-4518
> Phone: (480) 858-0393 x105
> Cell: (602) 684-7859
> Fax: (480) 858-1882
> Email: seandm@mmspec.com
> WWW.mmspec.com
>
>
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