Is the port re-jumpered for RS232 or is it still in the default RS422
mode perhaps?
Matthew Kaufman
(Sent from my iPhone)
On Jun 1, 2010, at 5:45 PM, "Robert Benward" <[email protected]>
wrote:
Hi Rex,
This well help a great deal. If you read some of my earlier posts,
I'm stuck with a Z3801A that I bought at the Dayton Hamfest, which
unfortunately, doesn't work. I'm hoping it's only the RS-232 port,
but after 24 hours, only the holdover light is on. So now I either
have two bad antennas, or a bad Z3801A (beyond the RS-232).
Thanks again,
Bob
----- Original Message ----- From: "Rex" <[email protected]>
To: "Discussion of precise time and frequency measurement" <[email protected]
>
Sent: Tuesday, June 01, 2010 8:28 PM
Subject: Re: [time-nuts] Motorola GPS Z3801A
Robert Benward wrote:
Hi,
Does anyone have the pinouts for the Motorola GPS within the
Z3801A? It's a ten pin header and I would like to intercept the
data stream to see if it's working. Also, I read about some of
the Motorolas putting out binary data, not NEMA protocol.
Thanks,
Bob
The Oncore interface diagram on Didier's page should be enough to
see which pins are which:
http://www.ko4bb.com/cgi-bin/manuals.pl?dir=05%29_GPS_Timing
For the details, here's a link to a nice clean Oncore manual:
http://gpsd.berlios.de/vendor-docs/motorola/
Chapter 6 of that manual is a description of the Oncore commands
that are used by these receivers. Yes, it is a mixture of ASCII
commands with binary data.
I forget which receiver(s) the Z3801A used. My Z3816a has a UT+ but
it is a little more recent than the 3801's. Someone here, no doubt,
remembers.
A few years back there were a bunch of posts to this list with
reference documents for the various Oncores that HP or Symmetricom
used in the timing receivers. Lots of detail of firmware versions
and differences between the Oncore receivers. I don't have a link
now. Maybe others do.
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