Hi
One would guess that the GPS module in the device is something
fairly normal. Motorola modules showed up in the early versions of
this gizmo.
Bob
> On May 9, 2021, at 9:00 PM, John Miller via time-nuts
> wrote:
>
> Tom,
> Thanks for sharing - this looks very interesting. I don’t think it
Tom,
Thanks for sharing - this looks very interesting. I don’t think it’s quite
identical, though. The unit I got was available in 232 and 422 (the one coming
to me is 232), and the data sheet for the PCTEL lists it as a 12 channel
receiver, whereas the 58534A is an 8 channel.
Once it’s in my h
Hi Tobias,
In the latest round of experiments in which the clock resolution was 6ns, I
could not detect any instability; the timestamps of the 1pps signal being
fed into my timestamper had identical low order bits for 250,000 seconds
(until I stopped the experiment). In this case the 10mhz referen
The equivalent hp integrated timing antenna was the 58534a. You may find
its documentation helpful:
http://leapsecond.com/museum/hp58534a/
/tvb
On 5/8/2021 6:36 PM, John Miller via time-nuts wrote:
I did mean this unit in particular, specifically I’m really interesting in
turning up the pin
> Generally speaking once power and ground are found everything else more or
> less falls in place.
Can you figure out power/ground with an ohmmeter? Or perhaps a battery,
resistor, and voltmeter?
Is the shell of the connector directly connected to one of the pins?
--
These are my opinions
paul swed writes:
> 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.
If you can figure out how to po
John
Totally agree on the power and ground. Good to know you like to take them
apart if required.
On Sun, May 9, 2021 at 2:09 PM John Miller via time-nuts <
time-nuts@lists.febo.com> wrote:
> I take everything apart, so that much is a given - I just also like to
> have as much original documenta
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 speaki
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
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
Hi, in reading between the lines, are you saying that in practice, the
tempco of twisted pair is worse than the tempco of coax? Wouldn't any
install where that was critical include a loopback to calibrate out cable
delay?
On Sun, May 9, 2021 at 8:27 AM Poul-Henning Kamp wrote:
>
> Doug
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