Didier, Oh, ok that makes sense, but that is a non-standard output, so not sure that you want to use such an output as a sample case for generic applications. Alternatively maybe rename the page to "Trimble CMOS-output Coax Cable Impedance Matching" to make that clear. It would be better to put a 45 Ohms series resistor in that system to give you a 50 Ohms standard output, and redo the tests. BTW: we have had to put up with that (in my opinion) stupid output impedance, on our Mini-JLT boards we are also driving the 1PPS with very low impedance to be compatible to the discontinued Mini-T. I wish Trimble had heard of incident-wave switching when they designed all of their units, and used a proper 50 Ohms output impedance. bye, Said In a message dated 11/26/2012 11:12:32 Pacific Standard Time, [email protected] writes:
Said, in the text I indicated the source was not a 50 ohm terminated signal generator, but the 1 pps output of a Thunderbolt with about 5 ohm impedance, hence the ringing. Didier _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
