It seems to be an L1/L2 dual frequency surveying receiver.
Searching for minimac 2816, without the AT, seemed to produce a few
more results with the following from 1988 amongst them
_http://cedb.asce.org/cgi/WWWdisplay.cgi?58399_
(http://cedb.asce.org/cgi/WWWdisplay.cgi?58399)
In some references it is said to replace the TI-4100. Maybe something to
document at
http://www.ion.org/museum/cat_view.cfm?cid=11scid=9
where some other early receivers are presented.
--
Björn
It seems to be an L1/L2 dual frequency surveying receiver.
Searching for minimac 2816,
I love the lightweight comment.
It has to weigh 20kg!
On 7 March 2011 19:19, gandal...@aol.com wrote:
It seems to be an L1/L2 dual frequency surveying receiver.
Searching for minimac 2816, without the AT, seemed to produce a few
more results with the following from 1988 amongst them
Hi
In the case of a GPS, you really can't increase the aperture (gain =
directivity) since you want to cover the entire sky.
The filter needed here is far from trivial. The spacing on the good to bad
signals is pretty tight in this case. A filter can indeed be built, no doubt
about that.
In message 298e3f36-5846-4814-ba22-3e9c520e3...@rtty.us, Bob Camp writes:
Hi
They are very cool devices - when you get them working. Without
the custom Windows software, they make a nice piece of wall art. A
lot of them are mated up with non-HP VXI PC's so getting them running
can take you off in
Indeed as I am slowly learning there is a gap in equipment vintage thats a
black hole.
Late 80s to 2005 approx. This is the point that the various test instruments
went more to a hybrid mix of hardware and software with external software
loads. When you pick up an instrument there are rarely any
I pretty much agree. Toss in so many companies trashed the originals
and you are left with luck that someone took a copy home with them.
I'll toss in another one, you get a surplus dealer and he immediately
breaks up a 'system' up to in his mind make more money and many times
that corrugated box
Greetings. I'm wondering if any one has any insight (or wishes to speculate)
as
to how the external analog frequency adjustment on a Temex LPFRS-01 Rubidium
standard functions.
From experimenting with one over the last few days there seems to be a step
function to the adjustment. I'm
On Mon, Mar 7, 2011 at 5:01 AM, Bob Camp li...@rtty.us wrote:
Hi
In the case of a GPS, you really can't increase the aperture (gain =
directivity) since you want to cover the entire sky.
No, in theory it need not be an omnidirectional antenna. One could use
a very high gain antenna if it
On 03/07/2011 05:52 PM, Mark Spencer wrote:
Greetings. I'm wondering if any one has any insight (or wishes to speculate) as
to how the external analog frequency adjustment on a Temex LPFRS-01 Rubidium
standard functions.
From experimenting with one over the last few days there seems to be a
“Greetings. I'm wondering if any one has any insight (or wishes to speculate)
As to how the external analog frequency adjustment on a Temex LPFRS-01
Rubidium standard functions.”
++
The spec sheet says 0-5 volts for analog adjustment. The unit supplies a 5V
hi-stability
I love the lightweight comment.
It has to weigh 20kg!
Is there a Moore's law for size/weight of GPS receivers? Has anybody plotted
it?
--
These are my opinions, not necessarily my employer's. I hate spam.
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Thanks. I recall seeing documentation that more or less said that directly
connecting these units to an RS232 port will typically work but is not
guaranteed. If you are able to easily check your unit that would be great but
I
will likely try connecting mine to an RS232 port in the next few
Hello:
I'm not sure if this is the right place; I've been having trouble
finding current info / discussions on NTP on linux.
I have a SEL 2407 clock (http://www.selinc.com/sel-2407/) that I was
trying to make more useful by providing NTP service to the university
(and others).
This clock has
On 03/07/2011 07:45 PM, Mark Spencer wrote:
Thanks. I recall seeing documentation that more or less said that directly
connecting these units to an RS232 port will typically work but is not
guaranteed. If you are able to easily check your unit that would be great but I
will likely try
On 03/07/2011 07:41 PM, Hal Murray wrote:
I love the lightweight comment.
It has to weigh 20kg!
Is there a Moore's law for size/weight of GPS receivers? Has anybody plotted
it?
Should be possible, but one should consider similar properties like
L1/L2 carrier phase tracking and storage.
There is an NTP email list. questi...@lists.ntp.org
But really, all you need is the 1PPS output and some pool servers.
If you have PPS working then all you need is a way to number the
seconds and anything can do that. Yes the PPS driver works with
other non-NMEA ref clocks
It would be good to
Thanks
The doccumentation regardings RS232 controll looks usefull. (I had not seen
this before, and in case any one else is following this thread here is a link..)
http://www.spectratime.com/documents/lpfrs_rs_232.pdf
Regards
Mark S
- Original Message
From: Magnus Danielson
Would it be possible to build a much simpler version that used a line array
phased to null the nearby tower.
I can't see any reason why it wouldn't be possible.
I don't expect it to be high volume so it probably won't be low cost.
It will also kill any satellites in the circle that goes
iLotus has the new TX Oncore timing receiver with a built in saw
filter and -159db sensitivity. Has anyone had a chance to put it
through its paces?
-- kc0ukk at msosborn dot com
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Hi
I have never seen any register level info on them. It may be out there.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Monday, March 07, 2011 8:11 AM
To: Discussion of precise time and frequency
Have you seen:
http://support.ntp.org/bin/view/Support/ConfiguringIrigRefclocks
Feel free to nose around on other ConfiguringRefclocks pages, and add
questions or improve the content.
H
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To
This may sound a bit basic, so apologies if you have already passed
this particular hurdle, but there are several different types of IRIG
time code. A number of the clocks I have which generate IRIG can
generate different versions of IRIG (e.g. IRIG B, IRIG H)
If memory serves, the NTP code
After playing with levels and such for a while, I got it to give me a
timecode = 00 , but no other numbers after that, and it appears its not
sync'ing to it. If I turn up the audio at all, I start getting errors
indicating overdriven IRIG, and if I unplug it, I get other errros reported,
so
Hi
Since you are after timing off of the sat's, having antennas that move, either
physically or electrically seems like a problem. Any shift in the effective
antenna location as you tracked the satellite would be exciting to compensate
for. There was an early paper published based on doing
Hello to the group.
Its been 2 weeks plus since I heated the FRS c up and regained lamp
ignition. In fact the lamps brightened by about .5-.75v or just over 8 volts
now. Not bad from below 1.83v as I recall. That may not be a valid number at
all. More accurate statement dead.
So thats been a
Since you are after timing off of the sat's, having antennas that move,
either physically or electrically seems like a problem. Any shift in the
effective antenna location as you tracked the satellite would be exciting
to compensate for. There was an early paper published based on doing this
I think it's simple, at least in the nice/common cases. If the antenna
geometry has a point that everything swivels around, consider that to the the
location of the antenna. I think that covers the typical alt-az mount:
http://en.wikipedia.org/wiki/Altazimuth_mount
The point is where those
On Mon, Mar 7, 2011 at 7:34 PM, Bob Camp li...@rtty.us wrote:
Hi
Since you are after timing off of the sat's, having antennas that move,
either physically or electrically seems like a problem. Any shift in the
effective antenna location as you tracked the satellite would be exciting
to
On 03/08/2011 05:22 AM, Hal Murray wrote:
Since you are after timing off of the sat's, having antennas that move,
either physically or electrically seems like a problem. Any shift in the
effective antenna location as you tracked the satellite would be exciting
to compensate for. There was an
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