Hi Good point. They could have GPS data simply to make the diag stuff happy, but not use it for the disciplining side of things. I had not considered that possibility.
Others have reported SatStat working on the slave, so there is at least *some* data coming out that port. Bob > On Nov 2, 2014, at 3:58 PM, GandalfG8--- via time-nuts <time-nuts@febo.com> > wrote: > > Just another thought though, does the diagnostic port on the slave also > communicate with SatStat etc? > > That would imply at least a transfer of serial data in one direction, even > if not for the control functions. > > Regards > > Nigel > GM8PZR > > > In a message dated 02/11/2014 20:49:49 GMT Standard Time, kb...@n1k.org > writes: > > Hi > > The supplied cable is indeed very short. It’s also quite stiff and a bit > flakey (intermittent). I would bet at least one cold order of fries that > there is no bi-directional serial between the two units. If there was, I > doubt > our little pin shorting exercises would get things running. > > If there is no serial at all (no GPS data), that makes using the slave for > a variety of projects quite simple (and thus attractive). One back burner > TimeNut project is an ensemble clock. > > If they are not looking at GPS strings, they are not doing sawtooth > correction. That is an interesting observation (if true). These boxes have > roots > in the paranoid GPS SA era, so that might not be a big surprise. > > Bob > >> On Nov 2, 2014, at 3:32 PM, GandalfG8--- via time-nuts > <time-nuts@febo.com> wrote: >> >> Given the expected close proximity of these units, presumably it was > only >> ever intended that they should work as a pair, and I remember Stu Cobb >> commenting on how short the supplied link cable is, I wouldn't be too > surprised >> if there turns out to be no serial comms between the units but perhaps > just >> handshaking via asserted levels. >> >> Regards >> >> Nigel >> GM8PZR >> >> >> In a message dated 02/11/2014 20:12:35 GMT Standard Time, kb...@n1k.org >> writes: >> >> Hi >> >> Yes, getting the GPS version worked out is certainly the thing most > people >> will be after. Doing the other box is a bit further down the road. The >> main thing (to me) is documenting the 15 pin connector as best we can. > That >> way whatever somebody decides to do in the future, they have a good > starting >> point. Identifying which pins look like RS-422 and which look like CMOS >> would go a long way to figuring both sides of this out. When I did the > other >> connectors, I just ran through them with a DVM. 2.5V = 422 input, 1.5 or > 3.5 >> = 422 output. I didn’t have any CMOS. Everything else was either open >> circuit or ground. >> >> Bob >> >>> On Nov 2, 2014, at 3:01 PM, GandalfG8--- via time-nuts >> <time-nuts@febo.com> wrote: >>> >>> Ah, I had wondered about that but was probably being a bit selfish as > I >> >>> only have the GPS based units:-) >>> >>> Given the similarity, I would assume where we've got to on these >> wouldn't >>> be a bad starting point, and at least identifying the 1PPS input on the > >> >>> interface connector should be straightforward enough. >>> >>> Regards >>> >>> Nigel GM8PZR >>> >>> >>> >>> In a message dated 02/11/2014 19:41:07 GMT Standard Time, > kb...@n1k.org >>> writes: >>> >>> Hi >>> >>> No, once we get the GPS end worked out, we need to do the same thing >> for >>> the non-GPS end. If we can fake it into working with just a PPS, it’ > s >> the >>> perfect thing to use to attach an OCXO to a newer GPS (like the > Jackson >> Labs >>> part …). >>> >>> Bob >>> >>>> On Nov 2, 2014, at 2:15 PM, GandalfG8--- via time-nuts >>> <time-nuts@febo.com> wrote: >>>> >>>> Hi Gotz >>>> >>>> That's great stuff, thank you, I'll try that later. >>>> >>>> At this rate we'll soon be finding ways of doing this without any >>> wiring >>>> whatsoever, perhaps we could start with just standing it upside down >> in >>> a >>>> dark corner on the night of the full moon:-) >>>> >>>> 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. > > _______________________________________________ > 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.