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.
