Magnus Another option (useful when the source amplitude is such that terminating isn't an option and there isn't a suitable amplifier available to boost the source amplitude) is to trim the cable lengths to eliminate such standing wave nulls at the counter inputs.
Bruce Magnus Danielson wrote: > John Ackermann N8UR skrev: > >> I think you guessed it, Ed. There are a number of applications where >> you want to drive at least two devices from the same reference so using >> a moderate input impedance facilitates that. >> >> I've done some goofy things like trying to drive 3 or more 5334A >> counters or 3586C VLF receivers from a single reference. My feeling as >> a result is that you can safely daisychain two devices, but three may be >> tricky. >> >> Ideally, you should terminate the end of the chain with 50 ohms, but >> depending on the drive level you might not be able to get away with that. >> > > Not terminating could create a null at or near one of them... thus > resulting in no input signal for that box. Overcoming that would require > more drive level than the other boxes wants... > > Cheers, > Magnus > > _______________________________________________ > 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. > > _______________________________________________ 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.
