Hi It’s an added circuit you need to build up and add to the box. It fakes out the slave detection logic.
Bob > On Nov 1, 2014, at 6:41 PM, Anthony Roby <[email protected]> wrote: > > 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.
