Le 28 févr. 2014 à 02:55, Brian Lloyd a écrit :
And after all that, *STILL* no one has been able to answer the question,
Is there a problem that must be solved? Oh, lots of supposition, rules of
thumb, boatloads of experience, etc., but still no determination that
something really needs to
Le 25 mars 2014 à 22:43, d0ct0r a écrit :
Today I spent good part of my time to figure out that my version of
Thunderbolt has some issue with the TSIP protocol definition. I am using
following document: ThunderBolt GPS Disciplined Clock User Guide, Version
5.0, Part Number: 35326-30,
Check also JEDEC standard 65B
http://www.jedec.org/sites/default/files/docs/jesd65b.pdf cited in a SiTime
doc
http://www.sitime.com/support2/documents/AN10007-Jitter-and-measurement.pdf
describes the types.
Le 17 avr. 2014 à 04:54, HagaaarTheHorrible a écrit :
Hello there,
I tried
A couple of points I discovered while building these things.
This morning I got an Adafruit Ultimate (MTK3999) and a uBlox neo-6M module.
The first thing I discovered after looking at the specs , was that both have
on board LDO 3.3V regulators, so you can feed them 5V without harm. I had
Le 6 mai 2014 à 21:56, Pascual Arbona Lopez a écrit :
The model is MR621 (Panasonic)
Mine are marked ML621
- Original Message - From: Jason Rabel
ja...@extremeoverclocking.com
To: time-nuts@febo.com
Sent: Tuesday, May 06, 2014 9:33 PM
Subject: [time-nuts] Battery Part
A few dumb questions:
But first a quote from the ITU ( doc G.180 )
4.1.12 (timing) jitter: The short-term variations of the significant instants
of a timing signal from
their ideal positions in time (where short-term implies that these variations
are of frequency greater
than or equal to 10
/2014 07:37 PM, bill wrote:
On 6/26/2014 2:39 AM, mike cook wrote:
A few dumb questions:
But first a quote from the ITU ( doc G.180 )
4.1.12 (timing) jitter: The short-term variations of the significant
instants of a timing signal from
their ideal positions in time (where short-term
times out. Can I get it from anywhere else?
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Works for me too now.. I thought that maybe .mil was under a DOS attack. Thanks
for the second source.
Le 9 juil. 2014 à 14:30, Brian Inglis a écrit :
On 2014-07-09 01:30, mike cook wrote:
times out. Can I get it from anywhere else?
http://maia.usno.navy.mil/ser7/bulb.dat
works for me
the source data.
Le 9 juil. 2014 à 15:15, mike cook a écrit :
Works for me too now.. I thought that maybe .mil was under a DOS attack.
Thanks for the second source.
Le 9 juil. 2014 à 14:30, Brian Inglis a écrit :
On 2014-07-09 01:30, mike cook wrote:
times out. Can I get it from anywhere
Thanks Brian,
Surprise, surprise I can get access this morning.
Le 12 juil. 2014 à 05:02, Brian Inglis a écrit :
On 2014-07-11 07:54, mike cook wrote:
Looks like my problem is back:
/usr/local/bin/wget -O /tmp/finals-all
http://maia.usno.navy.mil/ser7/finals.all 2 /dev/null
gets
Works in France too. But someone has to call to get it set.
Le 22 juil. 2014 à 06:40, Mark Sims a écrit :
Yes, the caller ID data has time in it. There are chips out there that
decode caller ID. I signaling format isially is the old Bell 202 modem
protocol. The caller ID devices
That and F11 (toggle fs mode) works fine for me:
LH version 3.10
Le 3 août 2014 à 19:15, Chris Wilson a écrit :
03/08/2014 18:12
Since upgrading to a new desktop PC running Windows 7 pro 64 bit lady
heather crashes if I use the top right full screen windows click
box. If I use
Le 10 août 2014 à 12:01, Peter a écrit :
I have checked it against my Racal ovened reference and found a discrepancy
of about 0.8 Hz.
Now the million dollar question...Can I be sure the FRK is good before I
start to use it as my standard frequency?
Is the FRK constructed in such a way
WOW! Guaranteeing compliance with FINRA OATS 7430 !
Here it is..
All computer system clocks and mechanical time stamping devices must be
synchronized to within three seconds of the National Institute of Standards and
Technology (NIST) atomic clock.
They are going to have their work cut
Le 31 août 2014 à 16:22, Mike Seguin a écrit :
I just started working with a Navsync CW12-TIM. I'm interested in programming
the freq output.
What's the best software to use?
I was looking for an app for the CW46, which uses the same GPS engine. The
Navsync doc mentions NS3KView and I
Le 7 oct. 2014 à 03:09, Bob Camp a écrit :
Hi
Missed the survey question…
If a ns in free air is about 1 foot (30 cm), then you probably want a survey
that is better than 6” to keep the error down. You do not want to have the
antennas on top of each other, so yes, the GPS will need a
Le 10 oct. 2014 à 03:09, Bob Camp a écrit :
Hi
GPS is steered by the Air Force last time I checked.
A really good place to check is the NIST Time and Frequency pages that show
both real time and historical data for each GPS sat compared to NIST time:
The constellation may repeat at 12hr intervals , but at any static position you
will only see one per day , no? , the other being 180 degrees way. I only get
one regular bump.
Le 20 oct. 2014 à 09:43, Magnus Danielson a écrit :
Bob,
Since the satellite orbit the earth with a period of 11
Le 29 oct. 2014 à 08:32, Karen Tadevosyan a écrit :
Thanks again for your explanations and advices.
I raised this question as a ADEV measurement result of my GPSDO/NEO-7M is
about 1E-9 for tau = 1sec
http://www.ra3apw.ru/wp-content/uploads/2014/10/NEO7M_OCXO_MV89A_10M_2h0_ADEV.jpg
and it
Le 19 nov. 2014 à 09:47, Anders Wallin anders.e.e.wal...@gmail.com a écrit :
Hi all,
I have a 53230A that behaves differently on ch1 and ch2.
With ch2 at DC/1Mohm/postive-slope/1V it triggers ok on my PPS signal and
shows e.g. a pusle-width measurement etc.
The same signal connected
You may have seen them as in
http://www.ebay.fr/itm/Ublox-LEA-6T-GPS-Module-w-Compass-for-APM2-5-APM2-6-Flight-Controller-Multirotor-/271641375221?pt=UK_ToysGames_RadioControlled_JNhash=item3f3f1671f5
There are other sellers with the same.
My idea was to see if one was suitable as a 1PPS locking
Le 24 nov. 2012 à 09:26, Joseph Gray a écrit :
Can anyone recommend an inexpensive 12.8 MHz OCXO that outputs a sine
wave? I've looked online, but the only ones I find costs hundreds of
dollars. Anything 0.25 ppm or better is fine. A Vcc of 5-13.8 VDC
preferred.
An uncommon OCXO freq. If
Le 09/12/2012 11:28, Tom Harris a écrit :
Greetings Time Nuts.
Time related, but unusually so:
I am examining the DCF77 (see http://en.wikipedia.org/wiki/DCF77 for a
refresher) data output from a master clock intended to drive a series of
slave clocks operated from 24V DC, interrupted by 100ms
2012 23:24, mike cook mc235...@gmail.com wrote:
Le 09/12/2012 11:28, Tom Harris a écrit :
Greetings Time Nuts.
Time related, but unusually so:
I am examining the DCF77 (see
http://en.wikipedia.org/wiki/**DCF77http://en.wikipedia.org/wiki/DCF77for a
refresher) data output from a master clock
gmail did the same for me Sahra but it is not systematic. This mail from you
was classified ok, but Bert Kehren's got flagged.
Le 14 déc. 2012 à 19:38, Sarah White a écrit :
Sorry, this is off-topic:
Wondering I'm if anyone else had part of this particular conversation /
thread (Synergy
Le 14 déc. 2012 à 21:12, paul swed a écrit :
I suspect my question became lost in the thread.
Can the Rasberry with RADclock be used as a NTP server?
Looking at the doc on the synclab.org site it appears that it can in the sense
that you can configure clients with radclock running to send
Le 20 déc. 2012 à 07:07, David Martin a écrit :
http://youtu.be/kOG9ImT2lvY
It wouldn't open for me... private
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Please help. It is not like you have plans for the weekend.
Keep calm, carry on..
Coincidence and timely advice from lady heather:
Just noted that the last date of the current long date cycle, 19.19.17.19,
happens in GPS week 1719.
inline: longdate.JPG
inline: world-ends-tomorrow.JPG
Le 20 déc. 2012 à 18:16, Burt I. Weiner a écrit :
Excuse me for asking... Can anyone tell me what time the world is supposed to
come to an end tomorrow? We have a lot of shopping to do and thought it
would be nice to be home and watch it on happen on TV.
I think its nigh. Here in
Le 28 janv. 2013 à 00:46, Frank Hughes a écrit :
snip
The NTP server works great!!
The only real difficulty is with the FreeBSD, it deletes the links to the PPS
and PALISADE drivers
at every reboot of the system, and can only communicate w/ the router if I
use DHCP.
to make device links
I think someones on it.
check out
http://www.ospmag.com/issue/article/Timing-Is-Everything
Le 4 févr. 2013 à 23:09, Stanley a écrit :
If a fiber-optic cable had temperature sensors either installed with or
embedded inside of this could make for better modeling changes in delay
making more
You are not wrong. I noticed the error myself. There no radioactive decay
involved. These devices were discussed in detail a while back here.
Lots of drooling and wringing of empty wallets.
Le 1 mai 2013 à 17:40, Sarah White a écrit :
On 5/1/2013 8:43 AM, Stephen Tompsett (G8LYB) wrote:
I inquired with Symmetricom here in France just after their announcement and
was quoted 1500euros for the development board.
Le 1 mai 2013 à 17:45, Volker Esper a écrit :
Cool. Is the Symmetricom CSAC SA.45s available to mere mortals? Which price
could we expect?
Volker
Am
I have a worse than optimal antenna location for my t-bolt and that just choked
on being fed the google earth location which is 7.5 meters away.
Le 2 mai 2013 à 14:22, Poul-Henning Kamp a écrit :
In message
CAPXiX5ricf=Ea0B=c2yr8ix+70srtfj9jeutkguqehh5izb...@mail.gmail.com, Stewart
Cobb
Le 5 mai 2013 à 21:18, Chuck Forsberg WA7KGX N2469R a écrit :
When doing a position survey, does Lady Heather have to be running?
Or does the Thunderbolt do it by itself?
Good question. I would have thought that once started, the survey would
complete even though LH was stopped/started,
Le 7 mai 2013 à 20:00, Sarah White a écrit :
On 5/6/2013 9:38 AM, Chuck Forsberg WA7KGX N2469R wrote:
I would like to set up a NTP server on a machine running Linux
(currently Korora 18).
What are the requirements for the 1 PPS signal fed to the carrier detect
pin?
I presume the 10 us
Le 17 mai 2013 à 06:45, Grant Waldram a écrit :
This is inside a security-fob protected room. I
can't get GPS signals in there, and the Australian radio clock network was
shut down about ten years ago. Our CDMA network was turned off in 2008.
Right now all I can think of is GSM, and while
Le 23 mai 2013 à 03:31, Jim Sanford a écrit :
Do you have any documentation on how to use them? I have one that I bought
to be an internet access point with a verizon card, failed due to verizon not
complying with the RFCs. Love the device, but no information on ports, etc.
Might want
Le 25 mai 2013 à 22:53, Jim Lux a écrit :
On 5/25/13 10:55 AM, Chris Albertson wrote:
3) the Pi is almost PC-like and very easy to use. Costs about $40
and requires a HDMI or DVI monitor..
If you don't need graphics it runs fine headless using putty to ssh into.
Le 22/02/2010 03:02, Alexander Sack a écrit :
Has anyone seen this:
http://www.drdobbs.com/linux-open-source/223000197;jsessionid=LEYQTVQD4D24TQE1GHPCKH4ATMY32JVN?pgno=1
Excuse if its been talked about but I don't see it in my mail
archives. I thought some of the ntpd'ers on this list might
TI seem to be pushing this platform. I got a publicity mail from Farnell
France saying that they are offering 10 development kits in a free draw.
Le 25/02/2010 21:45, Ronald Held a écrit :
I have that watch but have not had the time to learn how to program it.
Instead of a wireless daily
This issue seems to have been studied before and some tools exist to
predict the SV visbility in relation to local obstructions.
ref: http://proceedings.esri.com/library/userconf/proc05/papers/pap1615.pdf
I can't locate the freeware Leica tool cited in the paper though .
ArcGIS looks like a
This I think
http://www.allanstime.com/Publications/DWA/Science_Timekeeping/TheScienceOfTimekeeping.pdf
Le 28/05/2010 08:32, Hal Murray a écrit :
Where do you want to start?
Isn't that HP/Agilent App-Note with the three wrist-watches the place to
start ? 1289 or something ?
Hi Norm,
hmm. doc says that the command willl switch the port to 4800, so you
should see no coherent data at all immediately that the command is
executed. Were you still getting 9600 data without resetting the device?
Would it respond to MBP commands after the @@Ci ?
Mike
Le 30/05/2010
Norm,
I am not sure about the M12+ as I think that had NMEA support from
the start. GT+ also does but there are GT firmware versions that do not
support NMEA. Are ou sure it is a GT+ . Motorola give GT plus model
numbers R3211G11x, R3111G11xn. Does that fit? If you use the ID
command,
I see high is a relative term.
em-406a seems to be spec'd for 18000 meters. where are you going?
Le 30/05/2010 22:35, normn3...@stny.rr.com a écrit :
Hi all!!
Not all oncores are created the same. I THINK (based on inference)that some of
the GT+ receivers don't support nmea. Bad luck on my
DCF77 is transmitted in CET/CEST and so receivers generally just
display the received data with some allowing other TZ offsets as it can
be received in the UK for example. I also lucked out when looking for
one where daylight savings adjustments could be removed .
Le 05/06/2010 23:37,
Le 25/06/2010 06:40, Steve Rooke a écrit :
...snip...
Perhaps more like yourself would express the same sentiment publicly
here, that may be the encouragement that Warren needs to take that
plunge. So please speak up and add your support to Warren. Thank you.
I'll add my vote. If we had
oops.. thumbs instead of fingers
Le 25/06/2010 10:15, Sanjeev Gupta a écrit :
On Fri, Jun 25, 2010 at 16:02, mike cookmike.c...@orange.fr wrote:
Heaven forbid that I start more mud slinging, but I think that Bruce did
not take enough notice of Warrens assertion that his method was good
note that at 54,9 degrees, one least significant decimal digit in the
latitude/longditude is approx 11cm/6cm . That might well explain why
there are multiple references.
Le 12/07/2010 11:46, Peter Vince a écrit :
Hello Antonio,
Looking at the aerial photographs on Google Maps, the
As a number of examples have been referenced in the reply to the
original post, I will add a note on one of pendulums that Foucault
himself constructed.
Foucaults original experiments used shortish cables, but Napoleon
wanted a more prestigeous affaire. It was originally installed by
I thought that might have caused some confusion ;) . The bob, of course.
I guess it can be replaced, but it is a shame that as a historical
instrument, it could not have been better cared for. All is not lost
though, as one of his smaller original pendulums is swinging in the
Panthéon it
Hi Bob,
I have a Z3801A and I am not sure whether the SCIP commands are the
same as for the Z3805A. There must be some differences related to the
channel numbers and serial post configuration at least I would expect. I
think the following apply.
You need to not only be able to provide a
Check out Bryan Mumfords page.
http://www.bmumford.com/clocks/em2/index.html
Le 08/08/2010 11:14, Steve Rooke a écrit :
I was rather more thinking of the setup that Don was suggesting as not
many domestic clocks have a seconds pendulum and it would otherwise
take dividing down a referenced
Le 09/08/2010 18:46, Bob Holmstrom a écrit :
Food for thought.
I find it interesting that no one has suggested alternatives to
improving the performance of a pendulum clock other than controlling
it with a higher performance clock. If the goal is a better clock why
not attempt to
Le 29/08/2010 04:26, Hal Murray a écrit :
Have a pair of Z3801a receivers and GPSCon. The running time readout for
both is greater than 16,000. They were around 5,000 when I got them from
somewhere south of here.
I assume the units are hours, but my copy of the manual doesn't say what the
would that have shown up in a firmware version id change?
try *IDN? and see if there is any correlation Matthew.
Le 30/08/2010 03:23, paul swed a écrit :
I seem to remember a rollover about then that obsoleted older gps units.
On Sun, Aug 29, 2010 at 5:40 PM, Matthew
Hal's response was quite complete, but he missed one essential and
often missed parameter. Redundency.
I have been working for years in operating system support for major
international computer constructors and it amazes me how often I came
across equally large international clients who had no
Le 06/10/2010 08:07, Gerald Molenkamp a écrit :
Hi All,
Time, GPS and movement plays a big part in most discussions. Each day
brings something new and fantastic in the world of science, it just
makes you think where it will take us.
The naivity of scientists amazes me.
The guy says
If you
Le 13/10/2010 03:41, David McClain a écrit :
Hi,
No you aren't missing anything... except that I *DON'T* see the 5 mHz
drift that one should expect. Hence my contention that relying on
interpolated frequencies from FFT peaks and their adjacent bins is
bogus when the FFT bin size is as
Le 17/10/2010 11:55, David McClain a écrit :
I just received my LPRO-101 with a GPSDO control on it, from
TenMhz.com. After fiddling with getting a good placement for the GPS
antenna, so that it doesn't keep losing the satellites, I have been
attempting to discipline the oscillator for
horses for courses.
All the commercial atomic clocks clocks I have seen only do time
corrections every hour to save on the battery consumption. With one of
these receivers ( there is even a link to a homebrew clock project on
the referenced page comments tab) you get continuous time code
Le 27 mai 2013 à 16:56, Miguel Barbosa Gonçalves a écrit :
I don't understand why a microprocessor with an Ethernet controller and a 7
segment display would cost so much to manufacture... I think I'll build my
own.
One advantage of having an OS and NTP client on board is that you get
Yup,
Got a similar response from the local distribs here in France. They did
propose a similar product at 600euros VAT (19,6%).
Le 28 mai 2013 à 12:10, Mark C. Stephens a écrit :
I was sucked in and got this reply:
_ _ _ _ _ _ _
Dear Mark,
Thank you for your interest on
Nothing from Win7+latest Bitdefender update.
Le 22 juin 2013 à 16:12, Tom Miller a écrit :
MSE reports the two .exe files as unsafe and contains a virus. Does anyone
else see the same thing?
Regards
- Original Message - From: Mark C. Stephens ma...@non-stop.com.au
To:
Le 27 juin 2013 à 07:04, Mark C. Stephens a écrit :
I do believe the UT+ will try to charge the battery while on, so some sort of
rechargeable lithium cell is in order.
Yes, you need to connect our battery via Pin1if not using a rechargeable on
board.
-Original Message-
For info, the BBC provide an app for iPhone and iPad to read these videos
outside UK. Nothing for Android though :( .
Le 27 juin 2013 à 12:19, David Kirkby a écrit :
On 27 June 2013 06:08, Doug Calvert dfc-l...@douglasfcalvert.net wrote:
On Wed, Jun 26, 2013 at 10:07 PM, Dan Rae
Le 29 juin 2013 à 06:12, Perry Sandeen a écrit :
Wrote: Consider using a LT1083 7.5 Amp regulator.
Well it is $14 each. The LM 1084 5 Amp 1s $2.43 each
Hefty premium for an extra 2.5 Amps.
If one needs greater than 5 amps, the LM 1084 data
sheet shows how to easily parallel
Le 2 juil. 2013 à 02:52, Bob Camp a écrit :
Hi
snip
The reference I was making was to a pie in the sky 1.8 GHz clocked timer
integrated into a CPU chip. That would let you come up with ~ 600 ps timing
directly. Since it would be both unusual and very fast, a driver (potentially
Le 9 juil. 2013 à 13:49, Robert Atkinson a écrit :
Hi
Why are so many people radiophobic? As in ionising radiation. There are far
more hazardous things in our hobby, electrocution and falling from a height
be two of the big killers. I defy anyone to come up with a confirmed case of
death
I have lost the thread here but if not already mentioned, there is the driver
for Oncore receivers in ntp already, or if you are happy with the win apps you
could run them in Linux under Wine or VirtualBox.
Le 14 juil. 2013 à 02:05, Bob Stewart a écrit :
could run them in a linux box
OK,
Check the antenna data on the Leica site
http://www.leica-geosystems.com/en/page_catalog.htm?cid=2056. Maybe yours is
there. Part Nos don't usually have an easy mapping to product model IDs :-( .
If not , I did notice on the ones that I looked at that the supply voltages
were all 3,3V-12V.
Le 25 juil. 2013 à 05:21, James Peroulas a écrit :
I was hoping to measure the ppm error of a Raspberry Pi's crystal using an
NTP client running on the Pi itself. The NTP client reports a ppm
correction that I find to be consistently (measurements performed over
several days) off by about 10
Le 26 juil. 2013 à 01:54, Julien Ridoux a écrit :
Hi James,
We have done some measurements of the stability of the STC clocksource that
the kernel relies on to build its system clock. I believe this link could be
the answer to your question:
Le 27 juil. 2013 à 03:18, Julien Ridoux a écrit :
snip
Hi Mike,
Thanks for the interest in the data. You are quite right for everything
regarding data structure, but let me explain what we meant by that comment.
Timespec{} is a 64 bit data structure and support nanoseconds. Yes.
Thanks for that James.
Le 27 juil. 2013 à 04:26, James Peroulas a écrit :
Date: Fri, 26 Jul 2013 12:27:50 +0200
From: mike cook mc235...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] NTP to discipline Raspberry Pi
Just a heads up on an issue I had with a LEA-6T timing receiver advertised on
ebay in case any of you have one, or are thinking of investing.
The model I got is the one advertised in ebay item 261294820006. It functioned
OK for three months and then on powering up one day it seemed to be dead.
Le 24 janv. 2014 à 05:26, Paul Cianciolo a écrit :
Hello all,
I have had a MV89A running now for a couple of years now. It is inside of a
Dewar along with bypassing capacitors and the adjustment pot.
The end is sealed insulation. For a matter of convenience the oscillator is
mounted
Hi,
I have just brought my PRS10 out of mothballs and am trying to get a good
lock to my TBolt 1PPS.
The 1PPS OUT signal from my PRS10 has a very slow rise time, in the order of
70ns. I would be grateful, if anyone here has one on their bench, to let me
know what theirs is. I can't find
My recent attempts at posting have been all been blocked for some reason so I
am switching email address in the hope that that corrects it.
Here is my last one, hoping that it is not a repeat for you guys.
Hi,
I have just brought my PRS10 out of mothballs and am trying to get a good
lock to
Jarl Risum gave me some info which could explain that. His PRS10 1PPS rise time
, taken at the unit DB connector pin, was about 50ns, which is in the same
ballpark as mine, but he noted that if the Breaklout Board is installed , the
signal passes through a two Schmitt inverters (74HC14s).
Le 31 janv. 2014 à 06:06, Brian, WA1ZMS a écrit :
snip
Modern pendulum clocks have a modified gear drive where the
escapement is still being driven while the main wheel is being advanced
to wind the weight cable. Not the case for 200+ year old clocks.
It is not so much the case
Hi,
Till now I have been putting receivers in individual boxes. So to limit the
growing number of boxes, I want to put two Resolution-T SMT receivers in one
box, sharing power and antenna inputs. My question is How best can I share
the antenna input, minimizing any interference between the
to be less. A Mini Circuits splitter will just about do it , but I
would prefer a smaller solution.
Am 04.02.2014 14:08, schrieb mike cook:
Hi,
Till now I have been putting receivers in individual boxes. So to limit the
growing number of boxes, I want to put two Resolution-T SMT receivers in one
Le 5 févr. 2014 à 01:22, Michael Blazer a écrit :
Wouldn't the watchmaker notice that his clock is always a few seconds fast?
If the cannon is a mile away, the watchmaker would be adjusting the clock so
that 'noon' would sound around tea time after about 10 years.
Gibraltar is very
Le 5 févr. 2014 à 01:52, saidj...@aol.com a écrit :
Michael,
use a simple BNC T-splitter. Works perfectly for me as long as both GPS
carry the same antenna voltage. No loss in signal quality evident from the
C/No readings, and dirt-cheap. No need to over-complicate this.
bye,
Said
Le 7 févr. 2014 à 00:18, d0ct0r a écrit :
Hello,
Does anybody seen any links to the information how to implement external OCXO
to Symmetricom PCI TFP BC635/BC637 ?
check the Symmetricom datasheets. You don't mention the version you are
needing info for , IRIG/GPS.. Anyway, all
I don't think this is an issue. The datasheet indicates :
When reading or writing the time and date registers, secondary
(user) buffers are used to prevent errors when
the internal registers update. When reading the time and
date registers, the user buffers are synchronized to the
internal
Something that must be simple to explain, but that I can't get my head round.
I got a new 53230A.
When first using it, I measured my T-Bolt 10MHz using the internal 10MHz
timebase and it came up short of 10MHz, 9.999 998 5xx. I wasn't worried about
it as the counter only has a TCXO internal
Le 17 févr. 2014 à 13:49, gandal...@aol.com a écrit :
Hi Michael
Internal reference out is likely to be of the actual reference in use, ie
with an external reference connected that's what will be on the output
connector and would explain what you're seeing.
Your initial test, using
cover how
those connections work. Otherwise, perhaps someone that owns one could
provide further insight.
BillWB6BNQ
mike cook wrote:
Something that must be simple to explain, but that I can't get my head
round.
I got a new 53230A.
When first using it, I measured my T-Bolt 10MHz
capitalists?
Come on, thats backseat driving. Be happy they invested millions of their own
money and put out a more or less affordable new counter in a market flooded
with good low-cost used counters.
Bye,
Said
Sent From iPhone
On Feb 19, 2014, at 0:33, mike cook michael.c...@sfr.fr
Le 02/03/2012 05:13, Neville Michie a écrit :
A possible solution is to take mean time (from a TBolt 10MHz) and
divide it by 9,972,695.7 to give a PPS(sid) signal that can run a
digital clock dial and give one second(sid) ticks to phase the
pendulum. It may be simpler to divide by 9,972,696
Le 09/03/2012 08:29, Roger Costello a écrit :
I noticed this which could potentially be a very good thing.
https://newsroom.unsw.edu.au/news/science/nuclear-clock-may-keep-time-universe
Interesting. Thanks for the ref. I am afraid it will be a while before
the price drops to $40 shipping
A man with only one GPS
Surveys from different receivers I have. All taken at the same
height from prolonged surveys. WGS84 datum.
Oncore UT+ A 207,62m
Oncore UT+ B 209,24m
Z3801A 180,72m
Oncore VP A 229,95m
TBolt 207.00m
Le 10/05/2012
Le 10/05/2012 15:51, Jim Lux a écrit :
On 5/10/12 6:42 AM, mike cook wrote:
A man with only one GPS
Surveys from different receivers I have. All taken at the same height
from prolonged surveys. WGS84 datum.
Oncore UT+ A 207,62m
Oncore UT+ B 209,24m
Z3801A 180,72m
Oncore VP A 229,95m
Le 10/05/2012 21:50, Jim Lux a écrit :
On 5/10/12 9:18 AM, Chris Albertson wrote:
On Thu, May 10, 2012 at 9:07 AM, Bob Campli...@rtty.us wrote:
.
Hi all,
Hope this isn't too chat roomy, however, I have need of a survey
precise
geolocation type gps. I was wondering if the precise timing
Le 11/05/2012 07:14, Peter Monta a écrit :
Are there better estimates of the ET second nowadays (relative to the
SI second)? It would be interesting to know what the cesium frequency
should have been if much better estimates of the ephemeris-time
second were available at the time. One would
Hi Merv,
I found the Navman Jupiter designers guide which has the message
formats. What you need is message 1331.
Tac32 supports this receiver, so there should be a possibility at
setup to specify NMEA protocol. Else stuff it a 1331 .
The guide is at
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