Hi all, Thanks for all the responses.
The GPS units were swapped on the splitter ports, and the phase difference did in fact change. It changed from 21nS to around 5nS. Not exactly what was expected, although it would tend to indicate the RF path is not the same through the splitter.
Last night a 'symmetrical splitter' was made up using a mini circuits ZFRSC-42. Both of the outputs to the GPS units were AC coupled. A bias T was inserted directly on the antenna feed with external power feeding the new splitter antenna port.
The PPS's are now very close, about 1 nS average difference. If this holds solid, in a few days I'll swap splitter ports again.
Thanks, Dan _______________________________________________ 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.
