Hi If you:
1) Do not have two units (Ref 0 and Ref 1) — and — 2) Do not “fake out” the slave detect (= use the mod) Then the unit you have will not: 1) Enable the pps out 2) Enable the 15 MHz out It will try to disciple the OCXO, but you won’t be able to see any result of that. Bob > On Nov 1, 2014, at 7:05 PM, GandalfG8--- via time-nuts <[email protected]> > wrote: > > Hi Anthony, > > It's a new circuit that has to be inserted, which is what I've done, but > I'm not sure whether or not it's strictly necessary for the unit to function > or whether it's just there to get the lights sequencing properly and > perhaps all that's needed for basic functionality are just the links. > > I'm leaving well alone for now to let the oscillator run overnight but > will try it again tomorrow with just the links and see what happens. > I'm also hoping to get some idea of the between unit signalling, although > I only have Z3811s I'm hoping, with the boards being an almost identical > match, that what goes one way should be matched by what comes the other. > > Regards > > Nigel > GM8PZR > > > > In a message dated 01/11/2014 22:41:09 GMT Standard Time, [email protected] > writes: > > I wasn't clear from the photo whether the circuit was a representation of > what is on the board, and you just had to connect the pins listed together, > or whether this was a new circuit that had to be inserted. Sounds like > the latter? > > Anthony > > -----Original Message----- > From: time-nuts [mailto:[email protected]] On Behalf Of > GandalfG8--- via time-nuts > Sent: Saturday, November 01, 2014 4:04 PM > To: [email protected] > Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, > Z3811A, Z3812... > > Well, I'm happy to report that Arthur's modification does do the trick, > although I don't know why as I don't have any data for the interface as yet. > I daren't disturb the 15 pin connector right now as this Z3811A PCB is > still out of its case and connected to a breadboard with wires just pushed > into the sockets, and for the same reason I don't have any computer > connection at the moment either. > > My implementation isn't quite as described, in that I've not made a > connection to the fault LED but am just manually pulling that input high and > low > on the breadboard with another wire link as required. > Whether or not this is part or all of the reason that my green "on" light > is flashing rather than steady I don't know, but I am seeing the 1PPS and > 15MHz outputs and the 15MHz looks to be conditioning ok. > > Aside from the 5 volt supply, which I'm picking off from pin 5 of the > header between u33 and U34, and the aforementioned fault LED connection, all > the other connections can be made to J5 externally and could be housed in a > 15 way shell along with the switching circuits. > > I'm still hopeful that some cross linking of the right pairs might > achieve the same result without the extra circuitry, so "all" that needs to > be > done now is just to identify the right pairs:-) > > At least with it up and running it should be easier to check out some of > the inter-unit signalling. > > Thanks Arthur, your efforts are much appreciated. > > regards > > Nigel > GM8PZR > > > > > > > > In a message dated 01/11/2014 15:25:02 GMT Standard Time, [email protected] > writes: > > For those who missed it, Arthur's post is at > https://www.febo.com/pipermail/time-nuts/2010-June/047825.html and the photo > is at > http://i906.photobucket.com/albums/ac262/rjb1998/RFTG-uREF1photo1_zps87c505ca.jpg > > Anthony > > > > > -----Original Message----- > From: time-nuts [mailto:[email protected]] On Behalf Of Arthur > Dent > Sent: Friday, October 31, 2014 9:20 PM > To: [email protected] > Subject: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, > Z3811A, Z3812A GPSDO system > > Bob Stewart bob at evoria.net > ?? ? I have both of my units sitting on the bench. I found that I needed > to connect them together to get the REF1 unit to come out of standby ? . ?? > > Bob Camp kb8tq at n1k.org > ??I suspect that somebody will have to figure out what the 15 pin > connector / jumper is doing. On previous RFTG units there was a way to > re-wire > the crossover interface to fake out the slave detect process. That would > let > you run a single GPS equipped box and have it behave correctly. Without > the fake wires trick none of them played nice without the slave being > present ? > . ?? > ++++++++++++++++++++++++++++++++++++++ > Reposting what I had posted over a week ago, in case you missed it ? . > > Arthur Dent golgarfrincham at gmail.com Wed Oct 22 13:59:48 EDT 2014 ?? > ? > Way back on Fri Jun 11 16:48:43 UTC 2010 I posted about using one of > these units I had modified but at the time there wasn't a single person who > was interested. I have been using the RFTG-u REF1 since then and it is a > nice unit. The modifications I added (including a power supply -see photo) > allows the lights to cycle through their normal sequence on warm-up and the > second unit isn't needed at all ? . ?? > > -Arthur > _______________________________________________ > 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. > > _______________________________________________ > 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.
