From: John Fisher ([email protected])
Date: Thu Oct 19 2000 - 15:38:44 PDT
Fabrizio,
We have built these using equal length sections of semi rigid coax with
sma's at one end. The semi rigid copper outer shield is soldered together
approx. every 3 ". Prepare the ends by careful cutting of the
shield with an exacto knife, than solder the center conductors to
the launch point vias or pads. Tektronix shipped some of these to
us as accessories when we bought their IPA-510 a few years ago. I
might be able to find a tek part number but someone like Micro-Coax could
make some for you or find an off the shelf semi rigid assembly with sma's
on both ends and then just cut it in half. Be carful not to bend it too
much and kink it. These can also make nice 50 Ohm 10x passive
probes with the addition of a series 450 resistor at the end.
Regards
John
At 03:44 PM 10/19/00 -0400, you wrote:
We're having problems getting a good high
frequency launch when probing pc
boards and cable differential pairs when taking TDR measurements.Has
anyone
found good differential TDR probes which allow you to measure very
closely
spaced points on pc boards or cables?
Thanks and regards,
Fabrizio Zanella
Hardware Engineering
EMC Corporation
[email protected]
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected]. In the BODY of message put:
UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at
http://www.qsl.net/wb6tpu
****
This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:29:48 PDT