[time-nuts] Lucent KS-24361 GPSDO arrived today several questions

Bob Camp kb8tq at n1k.org
Fri Nov 7 21:14:12 EST 2014


The reason it was listed as #1 on the list is that I made the backwards numbering mistake when I was trying to work out the resistances on the interface connector. I’ve been doing this for > 40 years and I still mess it up on a regular basis. We also seem to get it wrong from time to time when we lay out connector connections on pc boards, but that’s another story altogether …..


> On Nov 7, 2014, at 9:09 PM, Alan Hochhalter <alanh137 at gmail.com> wrote:
> I got in a hurry and made mistake #1 listed by Bob a few replies back.  I
> hooked one up to the RS422/1PPI port transmit pins (same as on J8) and was
> receiving data fine in the PC so I just hooked up the other pair of
> terminals to the receive pins for J8 and couldn't get any response to
> commands.
> I finally found that I had initially connected the Lucent box ouput pins to
> the wrong terminals on the converter.  The Time code data on J6 was still
> getting into the PC even though it was connected wrong.  So I just wired
> the Lucent box input pins to the other pins on the converter that are
> really inputs and couldn't get J8 sto work either.
> What I ended up with to make it work is: J8-9 to RX-, J8-5 to RX+, J8-8 to
> TX- and T8-4 to TX+.
> Alan
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