Seems to me you could adjust the feed line length value in one of the receivers to zero out the difference as it appears that the path length is slightly different.
>From Tom Holmes, N8ZM > On Dec 23, 2015, at 11:11 AM, Dan Kemppainen <[email protected]> wrote: > > 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 -- [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.
