Hi Here’s another way to look at the data:
pin pin res res Pair from to from to A 1 9 oc/1k 10k B 2 10 10K o.c. C 3 11 1K 1K (short pin on 3) D 4 12 1K o.c. E 5 13 o.c. gnd (short pin on 13) F 6 14 1K o.c. G 7 15 o.c. o.c./ 1K I don’t know if that’s more clear or more confusing. It certainly suggests there are a variety of things going on. OC on one, 1K on the other D,F and 1/2 G Different GPS, Slave A,G OC on one end 10K on the other B and 1/2 A OC one end Ground on the other E 1K both ends C OC both ends 1/2 G 1K and 10K 1/2 A I suspect some of the open circuits are just that - no connect. I wonder what happens if you plug two GPS’s together or two slaves together? Some of the odd pins may be to sort that kind of thing out. Bob > On Nov 2, 2014, at 9:11 PM, Bob Camp <kb...@n1k.org> wrote: > > Hi > > Well here’s some data to think about: > > Pin GPS box Slave box > > 1 o.c. 1.1 K > 2 10 K 10 K > 3 1.1 K 1.1 K > 4 1.1 K 1.1 K > 5 o.c. o.c. > 6 1.1 K 1.1 K > 7 o.c. o.c. > 8 ground ground > 9 10 K 10K > 10 o.c. o.c. > 11 1.1 K 1.1 K > 12 o.c. o.c. > 13 gnd gnd > 14 o.c. o.c. > 15 o.c. 1.1 K > > All of the above are resistance to ground on a unit with no power. Just for > reference, the 422 transmitters on the PPS connector read 550 ohms, the > receivers read around 3K ohms. > > Simply put, except for the resistors on pins 1 and 15, the two boxes look a > lot alike. No idea if the open circuit (o.c.) is actually connected to > something or not. > > Bob > >> On Nov 2, 2014, at 6:25 PM, GandalfG8--- via time-nuts <time-nuts@febo.com> >> wrote: >> >> It would seem that the hunt for 1PPS will need to be attempted by someone >> with two units coupled together. >> I don't know if there's some sort of handshake enablement but with just the >> Ref-1 unit I've not been able so far to find 1PPS on the Interface >> connector, either during the boot up sequence or when up and running. >> >> The 1PPS on pin 6 of the RS422/1PPS connector is very easy to spot so I >> don't think it's just a case of me missing it on the interface. >> >> Regards >> >> Nigel >> GM8PZR >> >> >> In a message dated 02/11/2014 23:03:34 GMT Standard Time, kb...@n1k.org >> writes: >> >> Hi >> >> I bet (again the order of fries) that the ground on pin 13 that crosses >> to is some sort of “other box plugged in” indicator. >> >> So: >> >> The 15 pin cable is: >> >> >> Pair End A End B >> >> A 1 9 >> B 2 10 >> C 3 11 (short pin on 3) >> D 4 12 >> E 5 13 (short pin on 13) >> F 6 14 >> G 7 15 >> >> ground 8 8 (short pin on 8) >> >> >> Pair B - CMOS signaling >> Pair C - CMOS signaling >> Pari D - one half of RS-422 >> Pair E - CMOS signal ? ground on pin 13 >> >> We have A, F, and G in the “to be discovered” category. One of those >> should be the other half of D. Something in here should be a PPS. >> >> Bob >> >> >>> On Nov 2, 2014, at 5:48 PM, GandalfG8--- via time-nuts >> <time-nuts@febo.com> wrote: >>> >>> Thanks Gotz >>> >>> 2 and 3 grounded works fine for me too, although I still have one unit >> that >>> insists on flashing the ON light rather than bringing it on solid. In >> all >>> other respects both units seem to match. Two more should be arriving >>> sometime in the next couple of weeks so will see how they match up. >>> >>> Just for reference, pin 13 is also a ground connection so if just >> pushing >>> wires into the connector it might be convenient to use both grounds. >>> >>> Regards >>> >>> Nigel >>> GM8PZR >>> >>> >>> >>> >>> In a message dated 02/11/2014 17:58:12 GMT Standard Time, >> go...@g-romahn.de >>> writes: >>> >>> >>> >>> Am 02.11.2014 15:08, : >>>> Ooh err, whoops, and oh dear !! >>>> >>>> Arthur, I've only just had a chance to look at your latest photos, and >>>> unless I've really got my wires crossed, if you'll pardon the >>> expression:-), >>>> your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins >>> 4, 6, >>>> 11, and 13. >>>> >>>> As far as I'm aware the numbering from the front of that connector as >>> shown >>>> starts in the top right hand corner and every row is numbered right to >>>> left. >>>> That's certainly how mine are numbered anyway, and I wired them >>>> accordingly, and it worked, so where the heck does that leave us >> now?:-) >>>> >>> -------------------------- >>> thanks Nigel for detecting this glitch. I removed all jumpers now and >>> tested some reasonable new/old combinations resulting in very simple >>> scheme: >>> it seems to be sufficient to connect pin2 and pin3 to pin8 (ground). >>> Numbering as provided by Nigel and markings on my 15 pin-plug. >>> >>> Götz >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.