I hesitate to say this for fear of provoking a fault, but although I
wouldn't consider them especially good, they're not universal failures. I
have a Pi running a house control and logging system that has an uptime of
230 days despite being largely unattended (I'm not on site - it doesn't get
any
The schematic seems to have 4 pages (only page 2 is in the PDF) and
the description indicates that ICs Z19, Z14 and Z10 recover the IRIG
code but the relative schematic page is missing...
On Sun, May 24, 2015 at 9:55 PM, Joseph Gwinn joegw...@comcast.net wrote:
Responses interspersed below. Joe
Thanks for the replies. I think this will make a very nice clock for my
lab, though before I relegate it to a shelf I plan to replace the battery
pack and experiment with the performance. I especially like the features
for syncing it precisely to an external source. After a month or two of the
Sort of a Navy AN/URQ-10A (Frequency Electroncs FE1000Q) and a Systeron Donner
8520 rolled into one. Both are in ARINC outlines and would fill about the same
dimensions side-by-side. The only difference would be that the SD also outputs
IRIG time codes.
Greg
Hi
What you bought is a really cool “clock trip” style time transfer standard. You
sync it up to the “reference clock” and hop in the car. Drive off to the remote
site and use it to adjust the “remote clock” to the correct time.
Very useful back in those days, if you needed to keep a bunch of
We used them as time transfer standards to sync the clocks at the Titan missile
sites to the clock at the host base. The sequence was clock sync at the host
base, travel to the site, sync the site clock, return to base and check timing
error. If the error exceeded x, repeat until the error was
The manual describes it as a time transfer standard. It is equipped with NiCd
batteries to facilitate operation of the unit while in transit, as well as the
provision for external DC in.
Sent from my iPhone
On May 24, 2015, at 16:35, Dan Watson watsondani...@gmail.com wrote:
Hi,
I just
That was before my time at Austron. We made lots of those and no one
seemed to complain until they broke.
Jerry
On Sun, May 24, 2015 at 4:35 PM, Dan Watson watsondani...@gmail.com wrote:
Hi,
I just picked up an Austron 1210D-03 on eBay. It was an impulse purchase
based on the apparent
Not sure there is much to say.
Its a very nice oven xtal oscillator and divider chain.
It has some nice features like slew for the 1pps and would guess it has
battery backup.
But the question becomes the value?
Depends on what you are trying to do.
There are numbers of GPS locked references for
Hi
If you believe the 3 ns / M applies in this case, tides will give you about
1 ns or so. If the geometry of the motion (vertical) and the orientation
of the sat’s is not same / same, the impact will be a bit less.
On an L1 system without some sort of ionosphere “help” and working just
off of
Dan,
A Google search locates a manual and schematics at
http://www.to-way.com/tf.html.
-Glen
Sent from my iPhone
On May 24, 2015, at 16:35, Dan Watson watsondani...@gmail.com wrote:
Hi,
I just picked up an Austron 1210D-03 on eBay. It was an impulse purchase
based on the apparent
Hi
Add to that the fact that not everybody is moving at an inch per year. Around
here the magic number
is in the 1.5 to 2 mm per year range. It’s enough to be worth correcting survey
results vs benchmarks
every few years. It’s not enough to get into an L1 timing system any time soon
….
Bob
Hi Bob,
You only need a survey if your timing receiver is running in zero-D mode. If
you move the antenna more than some practical threshold you should adjust the
fixed position or maybe just do another survey.
If you plan to move a lot, or if your application is mobile, or are on a
slippery
Hi
Best guess is that you will get down below 1x10^-9 fairly soon. That will let
you
stay within 100 ns of GPS for a 100 second walk around the block…. It would be
unusual if it stayed below 1x10^-11 for any length of time. That would extend
your
walk time to about three hours.
As you take
Attila,
Timing people account for everything that's important. A continental drift of
an inch per year acts like a slow phase change over time, which by definition,
is a frequency offset. So an inch per year is at most 1/12 * 1e-9 / (365*86400)
or 3e-18. For the current precision with which
Hello all,
I am very pleased to inform you that the 1995 year bug on the TS2100 has
been solved.
You will have to replace the existing Trimble ACE III GPS receiver by
our N024 with special firmware.
If you wish to purchase it, just inform me how many units you will need,
and also your shipping
Surplus sales of nebraska has lenses that fit into the 5065A lamp
holders. (Also 5061A/B)
LMP-RL-180TT (teal- light green)
LMP-RL-180YT (yellow)
They show a green one also but it's too short.
The yellow needs to be filed a bit as the plastic portion that extends
into the holder is a tiny bit
Hi
If you happen to *need* precise time on a moving platform, then GPS can
do that as well. There are a number of military systems that have this need.
There are also some things like mobile direction finding by TDOA that have
multiple use cases.
Bob
On May 25, 2015, at 2:09 PM, Bob Stewart
Hi Bob,
How is this achieved? Is there a coupled dead-reckoning system that updates
the timing location, or something else?
Bob
From: Bob Camp kb...@n1k.org
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Monday, May 25,
Bob,
Tom says 'almost'.
In a static location you can improve your timing results by establishing your
antenna position as good as possible. It will work almost as good without a
survey.
In a moving scenario you can of cause not do a survey. But try finding another
way to do time transfer
Tom said: The nice thing about GPS, unlike other time transfer methods, is
that can handle the case of a moving antenna. As the antenna moves so does the
time. This is why GPS timing receivers work (almost as well) on top of your car
as on top of your house.
I don't get that. What's the
Hello, all
I recently came across a FTS 8400 Satellite Timing Receiver, and while I
await delivery, I am trying to dig up some more information about it. I
haven't been able to find much on line, but from what little I have found
they've been used in some pretty high end setups - which leads me
Hi
If I was going to do it today, I’d do an “all in view” solution with GPS /
GLONASS and whatever
else I could pick up (WAAS etc). I’d grab the data at L1 / L2 / L5. Even in
motion, the location
solution is going to be pretty good.
If it was a system that made money for people, there are
How is this achieved? Is there a coupled dead-reckoning system that updates
the timing location, or something else?
Hi BobS,
No need for dead-reckoning -- GPS gives you the location. And the time.
Take a step back and remember how GPS works. You have sats flying above that
essentially send
The following patent hints that the LTC6957 front end
probably consists of several cascaded long tailed pair
differential amplifier stages each with a selectable
bandwidth set by capacitors shunting the collector load
resistors. : US8319551
The input limiter is in effect a Collins style
Hi Tom,
I'm not sure what you mean by this 0D vs 3D. I'm using an LEA-6T. There are
three time transfer modes 0=disabled, 1=survey-in, 2=fixed mode. Are you
suggesting that I set it to disabled to run a test? I've never tried that. I
know that if I monitor the output while doing a survey,
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