With a high impedance input to the scope, yes. Some scopes offer a 50-ohm termination at the scope as well. If you use that, you must not use the 50 ohm termination at the CP1. Be careful though. Many built-in terminations in equipment like an oscilloscope has a very limited power handling capability. My scope limits the input voltage to 5V RMS when using its internal 50 ohm termination.
I use my 10:1 isolation probes with the scope so the CP1's 50 ohm termination is perfect. Actually, I'd have preferred they provide a test point for such probes, but hooking them to the "hot" end of the 50 ohm termination resistor on the CP1 board words too... Ron AC7AC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul T. Rubin Sent: Monday, October 02, 2006 4:45 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Question About the CP-1 Coupler Hi All: I am not sure I understand the procedure for terminating the sampling ports. If a port is unused it says to terminate it into the internal 50 ohm load to maintain balance. This makes sense. But if I connect a port (or ports) through a short piece of 50 ohm coax to a scope which has a high impedance input, is this port properly terminated? Thanks, Paul N8NOV Houston _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
