In message <[EMAIL PROTECTED]>, Dr Bruce Griffiths writes: >I can see the difference between the short 50 ohm cable terminated in 50 >ohms and the short 50 ohm cable terminated in 75 ohms. >It would be instructive to repeat this with a short length of 75 ohm >cable terminated in50 and 75 ohms.
The technique for visualizing these kinds of things is called Time Domain Reflectometry and you can do it with a good pulse generator and an oscilloscope. A HP5359A is perfect for the job, but less will do it. Read here how-to: http://www.hparchive.com/Application_Notes/HP-AppNote-62.pdf Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [EMAIL PROTECTED] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts