Hmmm ... I have four Z3805As, and one of them with 84k hours doesn't work any more ... in its case, LH reports no az/el/signal strength for ANY channels, i.e. it is not getting anything from the B1121P1114 Oncore receiver. But it throws no errors. I presume there is some problem in the front-end. +5Vdc does show up on the antenna connector ...
I tested this same unit with a later, same-form-factor R5122U1154 Oncore 8-channel NOS Oncore unit I bought off eBay, and in that case, the Z3805A reported GPS errors (because the R5122U1154 8-channel units is not true drop-in compatible with the B1121P1114 6-channel OnCores, apparently -- I think the new one talks a different protocol). TL, DR: in my particular case, it appears that the front-end of my original 6-channel B1121P1114 OnCore GPS receiver has gone bad, with all communications between the receiver and the rest of the Z3805A still working fine. Sorry, I don't seem to have a LH screen cap of the problem. Hence my interest in Synergy's drop-in upgrade for the B1121P1114 6-channel OnCore GPS receiver in the Z3805A. -- Andrew On Sat, Apr 9, 2022 at 11:12 AM Dan Rae via time-nuts < time-nuts@lists.febo.com> wrote: > I have attached a LH screen shot which includes a two hour long holdover > of the 3801A in question. Needless to say none of the six other GPSDOs > connected to the same antenna / distribution amp were affected. It is > certainly not an oven failure. > > I'll be waiting for Synergy... > > Dan > > ac6ao > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.