Ashtech Z-12-R Operation?
Hi:
I got an Ashtech Z-12-R that powers up and displays the start up screen, see:
http://www.prc68.com/I/AshtechZ12.shtml
But it does not progress or respond to button presses. Does someone have a pdf
manual or know how to kick start one of these?
Have Fun,
Brooke Clarke
By the end of the year, I want to upgrade my shop with a
reference clock derived from GPS. Suggestions on the way
to go now that the supply of old Cell Phone clocks seemed
to have dried up ? I don't mind building a disciplined osc.
Hopefully not too much a loaded question :-) ...
-pete
By the end of the year, I want to upgrade my shop with a
reference clock derived from GPS. Suggestions on the way
to go now that the supply of old Cell Phone clocks seemed
to have dried up ? I don't mind building a disciplined osc.
Hopefully not too much a loaded question :-) ...
-pete
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I have a Motorola RF-Audience! module with a GPS receiver
(disciplined time source).
I am not sure how to identify it....
Motorola 848504F01 P4, PTRN4307A, Copyright 1996, 4" x 11",
has an OnCore GPS receiver installed.
Front
LED's 9pin "D" BNC
pwr 10Mhz GPS 1PPS RS232 10Mhz
Back
9pin"D" 15pin "D" BNC
Power GPS/Timing 10Mhz
To make it more than a nice looking paperweight, I need:
-
A manual, or at the least connector pin outs.
-
Someone removed the OCXO.....
a. part number and source at a reasonable cost to replace the OCXO...
b. Has someone already hacked a HP 10811, or HP 10544 to this board?
Jim Cotton
n8qoh
Hi:
I got an Ashtech Z-12-R that powers up and displays the start up screen, see:
http://www.prc68.com/I/AshtechZ12.shtml
But it does not progress or respond to button presses. Does someone have a pdf
manual or know how to kick start one of these?
Brooke,
My Z12-T requires an external 20 MHz reference clock; I'm not
familiar with your -R model but it too may require this. It's not
uncommon for high-end geodetic-grade timing receivers to rely
on an external clock (e.g., cesium or maser). The idea is that
all received GPS signals are referenced to a real external clock
instead of an internal or virtual gps clock, or something like that.
So try that first. The quality of the 20 MHz is not important just
to see if it starts working. But clearly, to get good results, you'll
want to lock your 20 MHz to something atomic.
When I got my Z12 I played a bit with how to get 20 MHz. See:
http://www.leapsecond.com/pages/20mhz/
/tvb
Hi Tom:
How can I tell if the external clock is working?
I'm using Thunderbolt -> HP 8648A -> Z-12.
Have Fun,
Brooke
Tom Van Baak wrote:
Hi:
I got an Ashtech Z-12-R that powers up and displays the start up
screen, see:
http://www.prc68.com/I/AshtechZ12.shtml
But it does not progress or respond to button presses. Does someone
have a pdf manual or know how to kick start one of these?
Brooke,
My Z12-T requires an external 20 MHz reference clock; I'm not
familiar with your -R model but it too may require this. It's not
uncommon for high-end geodetic-grade timing receivers to rely
on an external clock (e.g., cesium or maser). The idea is that
all received GPS signals are referenced to a real external clock
instead of an internal or virtual gps clock, or something like that.
So try that first. The quality of the 20 MHz is not important just
to see if it starts working. But clearly, to get good results, you'll
want to lock your 20 MHz to something atomic.
When I got my Z12 I played a bit with how to get 20 MHz. See:
http://www.leapsecond.com/pages/20mhz/
/tvb
Brooke & Tom,
Hi:
I got an Ashtech Z-12-R that powers up and displays the start up screen,
see:
http://www.prc68.com/I/AshtechZ12.shtml
But it does not progress or respond to button presses. Does someone
have a pdf
manual or know how to kick start one of these?
Brooke,
My Z12-T requires an external 20 MHz reference clock; I'm not
familiar with your -R model but it too may require this. It's not
uncommon for high-end geodetic-grade timing receivers to rely
on an external clock (e.g., cesium or maser). The idea is that
all received GPS signals are referenced to a real external clock
instead of an internal or virtual gps clock, or something like that.
So try that first. The quality of the 20 MHz is not important just
to see if it starts working. But clearly, to get good results, you'll
want to lock your 20 MHz to something atomic.
When I got my Z12 I played a bit with how to get 20 MHz. See:
http://www.leapsecond.com/pages/20mhz/
/tvb
My Z12 does not eat 20MHz. (5MHz to 10MHz works IIRC)
Look for manual and other documentation around the below URL:
ftp://ftp.magellangps.com/Reference Stations/EOL/Z12 Marine Ref. Sta/
Outside of the timing community, I suspect rubidiums are more common
external sources than CS/H-masers.
--
Björn
bg@lysator.liu.se skrev:
Brooke & Tom,
Hi:
I got an Ashtech Z-12-R that powers up and displays the start up screen,
see:
http://www.prc68.com/I/AshtechZ12.shtml
But it does not progress or respond to button presses. Does someone
have a pdf
manual or know how to kick start one of these?
Brooke,
My Z12-T requires an external 20 MHz reference clock; I'm not
familiar with your -R model but it too may require this. It's not
uncommon for high-end geodetic-grade timing receivers to rely
on an external clock (e.g., cesium or maser). The idea is that
all received GPS signals are referenced to a real external clock
instead of an internal or virtual gps clock, or something like that.
So try that first. The quality of the 20 MHz is not important just
to see if it starts working. But clearly, to get good results, you'll
want to lock your 20 MHz to something atomic.
When I got my Z12 I played a bit with how to get 20 MHz. See:
http://www.leapsecond.com/pages/20mhz/
/tvb
My Z12 does not eat 20MHz. (5MHz to 10MHz works IIRC)
It should be configurable in 1 to 21 MHz in what appears to be 10 kHz
steps. I'll will experiment with them.
I think the Z12T bypasses the PLL lock and just buffers up the incomming
20 MHz and feeds it to the ADCs and DSP.
I racked Z12 is probably just a Z12T, which would make sense.
Outside of the timing community, I suspect rubidiums are more common
external sources than CS/H-masers.
Ionsphere, diffrential GPS and position ref stations use everything from
OCXOs to hydrogen masers.
Cheers,
Magnus
From a friend:
- At one time, Ashtech receiver manuals could be downloaded as PDFs
from Ashtech's website. Now, some Ashtech receiver manuals appear to
be downloadable from
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Manuals/
.
For example, see
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Manuals/USCG_Z12R.PDF
,
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Manuals/REFSTA.pdf
,
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Manuals/Z%20Family%20Technical%20Reference%20630203-01%20Rev%20C1.pdf
,
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Manuals/630203-Supp%20Errata%20to%20Z%20Family%206%20Dec%2002.pdf
.
- GPS receivers require firmware updates in order to keep up with
changes in the GPS signal structure, NAV message content and format,
etc. The latest update posted at
<ftp://ftp.magellangps.com/Reference%20Stations/EOL/Z12%20Marine%20Ref.%20Sta/Firmware/
is dated July 8, 2003. You may have to pay for a firmware update.
-
Remember that Ashtech was merged into Magellan long ago (in the
early 1990's IIRC), and that Magellan was merged into Sagem pretty
long ago (circa 1996??). Little or no support may be available for a
Z-12 now. -
That said, the Z-12 was an excellent receiver -- the best available
at its time.
-Chuck W1HIS
===========
-John
Hi:
Holding down the ^ (up arrow) while turning on the power switch sets it to
factory defaults. I also have the external 20 MHz into the Ref Freq input.
Now it's tracking sats and displaying the GMT time correctly and a position
good to 0.0001 minutes of Lat and Lon., i.e.:
39:11.4065 N
123:09.8448 W
248.63 m WGS84 (there's bobble of 10 or 20 meters on the elevation.
Thanks very much & Have Fun,
Brooke