You can buy or rent a Time Domain Reflectometer or you can build one
yourself as follows. Connect a 50 ohm pulse generator and high impedance
scope to one end of the cable and terminate the other end of the cable in 50
ohms. If there is a significant reflection at the far end of the cable as
noted on the scope, the impedance is wrong. Change the terminator to 75 ohms
to verify.
----------
From: Leslie Bai [SMTP:leslie_...@yahoo.com]
Sent: Tuesday, July 13, 1999 1:36 PM
To: emc-p...@majordomo.ieee.org
Subject: 50 ohm & 75 ohm
Dear members,
Anyone there can share the experience to measure
cables' impedance thus to identify whether a BNC
is a 50 ohm or 75 ohm cable.
Thanks,
Leslie
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
---------
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).
