I agree. I disconnected it after wondering about the active antenna bias.
> On Nov 17, 2017, at 12:35 PM, Magnus Danielson <[email protected]> wrote: > > Can work, can go wrong. > > One should be careful and think it though. > > Cheers, > Magnus > > On 11/17/2017 09:25 PM, Jerry Hancock wrote: >> I figured, what the heck, and just used a BNC T and it’s working. >>> On Nov 17, 2017, at 12:20 PM, Magnus Danielson <[email protected]> wrote: >>> >>> Hi, >>> >>> The reason I mention sharing antenna is that it takes out the difference >>> that is natural from having different antennas and the difference in >>> multipath. >>> >>> Sharing antenna has its own set of problems, so a suitable antenna splitter >>> was assumed. Effectively you need to bypass DC to power the antenna, you >>> need to amplify the signal to compensate for the loss due to the splitter, >>> and it needs to look like an antenna to the GPS receiver, so the antenna >>> alarm does not goes off. >>> >>> Cheers, >>> Magnus >>> >>> On 11/17/2017 09:01 PM, Jerry Hancock wrote: >>>> Thanks, understand completely. >>>> You mention “sharing an antenna”. Is there a problem with connecting the >>>> same antenna to two units? I am referring to my REF0/REF1 pair. >>>> Thanks >>>>> On Nov 17, 2017, at 11:39 AM, Magnus Danielson >>>>> <[email protected]> wrote: >>>>> >>>>> Hi, >>>>> >>>>> First of all, the receiver varies around some average phase. >>>>> The average of two receivers may not be the same, even if sharing antenna. >>>>> Their average can be offset from "absolute phase" because of offsets in >>>>> the receiver, antenna cables and antenna. >>>>> >>>>> If you are not to careful, a GPSDO will do nicely for many applications. >>>>> The more you care, the more hassle. >>>>> >>>>> Oh, and two GPSDOs next to each other can have significant common mode >>>>> disturbance, so you can't really evaluate a GPSDO by measuring up to >>>>> another GPSDO. >>>>> >>>>> Cheers, >>>>> Magnus >>>>> >>>>> On 11/17/2017 08:05 PM, Jerry Hancock wrote: >>>>>> Granted I expect someone on this list to reply with something that makes >>>>>> me feel stupid, if you have two GPSDO units running side by side, should >>>>>> the phase delta on the 10Mhz output be zero (ideally)? Is there an >>>>>> absolute phase standard kept between GPSDO units as all it would take is >>>>>> one extra inverter in the chain to flip the phase, no? >>>>>> Thanks >>>>>> Jerry >>>>>> _______________________________________________ >>>>>> 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. _______________________________________________ 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.
