I take everything apart, so that much is a given - I just also like to have as much original documentation as I can, especially if there are any special initialization or configuration commands. Whatever I find I will document for anyone else who gets one of these in the future. Generally speaking once power and ground are found everything else more or less falls in place.
John > On May 9, 2021, at 10:48 AM, paul swed <[email protected]> wrote: > > Back to the problem for a minute. > I have used some pctel antennas and they have been very good over the > years. (Very good = works). The model number at least gives you a hint if > RS 422 or 232. But if you can't find any further detail you are stuck with > one option. > Open it up and look. Most of these antennas can be opened and then > re-assembled. The hardest part is ensuring a good seal. > With respect to what's inside it should be reasonably apparent. Ground, > Power to some linear regulator, maybe a RS422 chip or 232 driver. Expected > leads for 422 nema and 1 pps so that would be 4 pins right there. > So you would be able to get the unit going if your willing to dig in. Pun > intended. > Good luck and let us know what you find. > Regards > Paul > WB8TSL > > On Sun, May 9, 2021 at 8:11 AM Poul-Henning Kamp <[email protected]> wrote: > >> -------- >> Mike Ingle writes: >> >>> Hi, in reading between the lines, are you saying that in practice, the >>> tempco of twisted pair is worse than the tempco of coax? >> >> I seriously doubt it. The change in coppers conductivity will not make >> that kind of difference in propagation time until the cables are measured >> in kilometers. >> >> I suspect the tempco comes from the RS-422 linedriver chip in the antenna >> or possibly from ceramic capacitors used to control its slew-rate. >> >> -- >> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >> [email protected] | TCP/IP since RFC 956 >> FreeBSD committer | BSD since 4.3-tahoe >> Never attribute to malice what can adequately be explained by incompetence. >> _______________________________________________ >> time-nuts mailing list -- [email protected] -- To unsubscribe send >> an email to [email protected] >> To unsubscribe, go to and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
