I recommend putting terminators on unused ports, on general principles. But I don't think it would ordinarily be necessary to use big-bucks terms, unless the distro amp is really cheaply made.
If you have access to a VNA, it would be interesting to measure the complex transmission coefficient from input to one of the output ports while experimenting with variations of the number and locations of terminations for the other output ports. If you find that none of such manipulations have any visible effect, then you can probably skip using terms on unused ports. I should mention that any such measurements should best be performed at roughly the intended operating RF power level. And for extra credit, report your findings to this discussion group. Dana On Thu, May 24, 2018 at 3:41 AM, Clay Autery <caut...@montac.com> wrote: > Putting in a hardware order... > > Question: Is it recommended to put terminators on all unused GPS Distro > amp ports? Output ports on GPSDO and NTP servers (10MHz and PPS). > > Thanks! > > -- > ______________________ > Clay Autery > MONTAC Enterprises > (318) 518-1389 > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.