Le 14/05/2012 17:23, Mark Sims a écrit :
My first inclination, if I were building a timing receiver, would be to make
the PPS output a nice, symmetrical square wave. But pretty much all GPS
timing receivers output an anorexic, dinky little heroin addicted supermodel
sized pulse (from 1
Le 18/05/2012 20:14, Ken Kubick a écrit :
Hi, Time-Nuts guys anyone know where I can get software for a Navman jupiter T
Tu60 GPS Kit 1pps 10khz GPS Module.
What you need depends on the protocol it powers up in.
If it is Motorola, you can talk to it with TAC32
If in Zodiac binary, then
Agreed. I made the distinction as someone in a previous thread was
indicating that they got a rockwell binary response on power on.
Le 19/05/2012 01:42, k4...@aol.com a écrit :
Mike,
The standard Jupiter-T should never power up in Rockwell binary. You have to
command it to go to binary with
Le 02/06/2012 09:22, ken johnson a écrit :
Hi, can someone please tell me how to get the satellite graphic plot
up on lady heather by using command line switches at program start?
If I enter s then 3 when the program is running I get some displays
up, but when I try to add the commands to the
Le 4 juin 2012 à 05:43, David I. Emery a écrit :
On Sun, Jun 03, 2012 at 09:20:59AM -0700, J. Forster wrote:
Is there any indication the carriers of WWVB and MSF are locked together?
-John
=
Given it's only 60 KHz and certainly somewhere north of parts in
10^13
Le 12 juin 2012 à 16:37, Ross T61AA a écrit :
Hi all,
I recently connected up a USB GPS to my Linux box and found it quite easy to
get NTP to up from the GPS. I was hoping to get the same GPS to update the
Mac running Lion 10.7.4, however, it has been a very frustrating uphill
battle.
Le 20/06/2012 10:22, John Miles a écrit :
Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T and Resolution SMT receivers
Thanks
Le 21/06/2012 00:13, mike cook a écrit :
Le 20/06/2012 10:22, John Miles a écrit :
Another long-awaited announcement:
http://www.ke5fx.com/heather/readme.htm
Highlights of V3.10:
- No longer a beta!
- Added support for Nortel NTGS50A-series receivers
- Added support for Resolution-T
Le 21/06/2012 00:18, mike cook a écrit :
39.517°N, 76.794°W
Recognise it? Flashy place near Baltimor.
Oops I just looked at the installed properties and see they point
to a LH server. Aargh!
All OK now.
___
time-nuts
Le 28/06/2012 00:28, Stijn Nestra a écrit :
Hello,
I have build a NTP server using the Soekris and M12 concept and I am
using a freebsd image that Jason has made.
The problem is that I am a total fbsd noob and that I want the
oncore_msg logged on a syslog server. I have tried several things
Quote from an unidentified admin:
Posted: Yesterday 10:35:14 PM
im rebooting a couple hundred linux servers right now, it caught us by
surprise and boofed our production environment tonight. i walk in from a
road trip across texas (carbine class) and in my door my phone starts
ringing. well
Le 19/07/2012 09:15, saidj...@aol.com a écrit :
Mini-T is end of life
How about onboard DDS with sine/square choice( and own SMA out if space
avalable)? Also programmable PPS offsets if not already available.
--
Les chiens aboient, et la caravane passe.
Le 06/08/2012 00:01, Bob Camp a écrit :
Hi
The part at the link does not appear to have a holdover specification. You
probably would do better with a TBolt off of eBay.
Agreed.
I took a look at the Axtal AXIOM40 data sheet and they are quoting 200
ppb per YEAR aging.. That's not bad; so if
Le 07/08/2012 17:56, Chris Albertson a écrit :
On Tue, Aug 7, 2012 at 6:45 AM, Jim Lux jim...@earthlink.net wrote:
On 8/6/12 10:43 AM, Chris Albertson wrote:
On Mon, Aug 6, 2012 at 8:34 AM, Jim Lux jim...@earthlink.net wrote:
what would be useful is to have some sort of plotting engine
Le 08/08/2012 11:00, Rex a écrit :
Hal,
I
If you go to: http://validator.w3.org and enter your link into the
address field
(http://www.megapathdsl.net/~hmurray/time-nuts/coax/Front-5ns-800x600.svg)
then click Check, you will get a message that sort of explains the
situation, except I still
nippedLe 30/08/2012 06:12, Neville Michie a écrit :
Does anyone know about what technology is used in Swiss watches to get much
better performance from
their xtals than you might expect?
I assumed that they had look up lists to insert extra counts to compensate for
ambient variations,
but I
As with the original chronometers, it is not the drift that is
important, but the stability of the drift. If you know that then getting
the correct time is simple arithmetic. That said, if you want to get low
drift numbers, a number of movements have been and are available to
improve on the
Martyn,
for M2M the command to select either GPS or UTC time output is
@@AwmCCRLF
m=0x00 for GPS
0x01 for UTC
C = checksum = XOR of all bytes after @@ and before the checksum
for GPS = 0x36
UTC = 0x26 if my logic is ok
- Original Message -
Hi,
I have recently been suffering form excessive jitter in the PPS TI values as
seen in Z38xx ( thanks for a great tool Ulrich) and am trying to find the
origin.
I don't have a full view of the sky and get forced into holdover due to
satallite loss once ore twice a day. Checking with another
I wonder how MacDonald would feel if someone opened up a chain of
MakDonald's?
- Original Message -
From: Robert Darlington rdarling...@gmail.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, October 29, 2009 6:40 PM
Subject: Re:
A stab in the dark. I don't have one of these.
The doc I find says that these are supplied with a rechargable lithium cell
which enables back up of GPS data . It is supposed to last 10yrs, so if
yours is reaching retirement age it may have gone awol and dropped the
serial parameters to a
I was thinking about the costs side as well. From the 2010 budget info I
have been able to find, The savings could top $36 million in 2010, with
something like $190M over the following 5 years.
I think that the GPS birds are far more than that to maintain and replace. I
found the following in
- Original Message -
From: Magnus Danielson mag...@rubidium.dyndns.org
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Saturday, November 21, 2009 4:05 PM
Subject: Re: [time-nuts] OT - GPS and North
Robert Darlington wrote:
It depends on the GPS
Nice idea.
I do have a couple of M12+T, so I could try, but they are not pin or voltge
compatable with the VP so it might require
some surgery. However I do have a couple of UT+ which are and it should be a
drop in replacement. They are pretty much command compatible aswell and may
be able to
: [time-nuts] z3801a gps signal reflection and EFC woes
At 04:33 PM 12/3/2009, mike cook wrote...
Nice idea.
I do have a couple of M12+T, so I could try, but they are not pin or
voltge compatable with the VP so it might require
some surgery. However I do have a couple of UT+ which are and it should
- Original Message -
From: jmfranke jmfra...@cox.net
snipped
You will often hear that time is the inverse of frequency, but the
inverse of
frequency is period or time interval. Time is set by governments.
I agree with the the sentment, but not the last phrase.
For me time just
- Original Message
From: Don Mimlitch donm...@yahoo.com
To: time-nuts@febo.com
Sent: Mon, December 14, 2009 8:23:34 PM
Subject: Re: [time-nuts] Cables for Palisade/Acutime
I can't help you with selecting the proper cabling, but I would like to know
where you found the connectors.
I was wondering the same myself and found they are sold online at:
http://secure.conwin.com/cgi-bin/store/cp-app.cgi?usr=51H4350135rnd=7294697rrc=Naffl=cip=92.132.242.176act=aff=pg=catref=navsynccatstr=
- Original Message -
From: Richard W. Solomon w1...@earthlink.net
To: Discussion of
No such thing as a siderial second.
Le 15/01/2010 05:04, Neville Michie a écrit :
It is an interesting question, we are so used to WWV and GPS with
regular time signals to synchronise clocks to mean solar time.
One method is to get a pocket calculator to identify a time in the
future when a
This Q was asked in 2008 here. The reference of Mouser as source looks
cheaper than Digikey.
from Mike S.
Here's the catalog page:http://www.mouser.com/catalog/635/1223.pdf
Mouser P/Ns: 152-FM11W1S-K121 (connector shell), 152-FMX006P102 (50 ohm
crimp/solder coax contact for RG-174U sized
Le 11/08/2011 08:57, Attila Kinali a écrit :
On Wed, 10 Aug 2011 16:35:11 +0200
cook michaelmichael.c...@sfr.fr wrote:
If TAI is a paper clock, what else should be used if a strictly monotone
time scale is needed?
Do you have any specific application in mind?
If you need an SI seconds rated
MJD , Modified Julien Date is the above -240,5 to keep the numbers
down. This was recognised as a time scale by the IUT. I think it is
now deprecated but is in common use.
There are probably others.
Oops, typo.. It should be UIT or ITU and not IUT and I forgot the cavet.
In general
Le 11/08/2011 16:25, Jose Camara a écrit :
The clock animations at http://www.leapsecond.com/java/gpsclock.htm are
great, but one has to pay attention to the note at top, saying they are all
based on your PC's clock, not actual time. If your pc is off 5 seconds, so
will be all of those clocks.
Le 30/08/2011 10:36, Rob Kimberley a écrit :
AFIK it isn't.
Rob K
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chris Albertson
Sent: 30 August 2011 8:40 AM
To: Discussion of precise time and frequency measurement
Subject:
Le 30/08/2011 11:21, Rob Kimberley a écrit :
The original question asked whether the speed of light was taken into
account in the definition of UTC. From where I'm standing (and please excuse
the pun), it isn't.
Rob Kimberley
There were 2 questions. I was agreeing to your response to the first
Le 30/08/2011 09:40, Chris Albertson a écrit :
How is the speed of light accounted for in the definition of UTC?
In other words, how did they solve the conflict where on one hand we'd all
expect two perfect clocks to tick at the same time but wether they do
depends on the location of the
Le 08/09/2011 23:03, Ken , VK7KRJ a écrit :
Is anyone else having trouble with this url?
I've been trying it since the email came through, it just times out
waiting for a reply.
I did try to get to it from the parent site, with the same effect. No
problem with the nist site direct, but no go
Le 09/09/2011 00:05, Tristan Steele a écrit :
Yep, I can't get it either - and I am also in Australia, so I think there
might be something in that.
Is there any chance someone could mirror it on a server accessible from Down
Under. :-)
Thanks!
Tristan
try me - might work
Le 22/09/2011 12:35, Martyn Smith a écrit :
Hello,
I'm trying to measure the Allan Deviation of an amplifier and need
help with
the maths.
My measurement process uses the SR620 in time interval mode and I make
one
measurement per second for about a day.
I then use Ulrichs excellent
Le 22/09/2011 13:45, Bruce Griffiths a écrit :
I have always thought of a noise floor as the lower limit to which
you can trust your measurement. Measurements below the floor can be
statistically derived IIRC, but calculating the Allan deviation of it
makes no sense to me. As your
Le 04/10/2011 11:42, jeffh...@comcast.net a écrit :
Have ever been to the best on-line shop?
looks like some new anti-spam control is required.
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.. and for the convenience of a board which includes USB and serial
connectors:
http://www.sureelectronics.net/goods.php?id=99
http://www.satsignal.eu/ntp/Sure-GPS.htm
Some assembly required. US $34.90 + PP
Nice box David. I confirm that results with FreeBSD are better and are,
for
Le 16/10/2011 18:34, David J Taylor a écrit :
I've just got a Rapco 1804M and while it works, within the limits of
my antenna placement, the RS-232 serial out doesn't read very well,
and seems to have incorrect characters. The voltage levels look OK,
and the terminal emulation program is set
Le 17/10/2011 16:55, Bill Dailey a écrit :
I need an NTP guru for a couple NTP questions. I have my Fury GPSDO hooked
up to a linux (ubuntu) computer have offset in the time-nuts category
(less than a microsecond) with pps. I am wondering where to go from here so
I can actually quantify the
Le 19/10/2011 07:03, Yuri Ostry a écrit :
Hello,
Wednesday, October 19, 2011, 1:21:31, Tom Van Baak wrote:
T So the antenna and receiver architecture is more complicated. Have you seen
any
T portable car navigation or cell phones with GLONASS?
Smartphone with both nav systems (sorry,
Le 24/10/2011 19:03, Bob Camp a écrit :
Hi
The quick and dirty way to improve the timing is pretty old school.
Toss a modern Cesium clock in the back of a car along with a bunch of
batteries. Drive it back and forth between Batavia and Soudan. If you drive
fast, that should be about an 8 hour
Think big. The experiment has been done over 168,000 light years.
http://en.wikipedia.org/wiki/Supernova_1987A
The neutrinos got here 3 hours before the light. (Empty space isn't really
empty. The dielectric constant slows the light down a tiny tiny bit.)
I am not sure that this is a
Le 25/10/2011 03:51, Rick Thomas a écrit :
When I first heard of this, I had a thought for a 4th explanation:
It seems likely, given everything we know, that neutrinos have a
very-small, but non-zero mass. Part of the point of this experiment
was to try to get a better idea of what what
Le 30/10/2011 20:21, Javier Serrano a écrit :
This can be done without
much regard to high precision. Some 100 ns are OK. If neutrino
time-of-flight had been the original goal of these experiments, quite
a number of things would have been done differently from the start.
I read that the OPERA
Le 13/11/2011 18:21, Chuck Forsberg WA7KGX N2469R a écrit :
Seems like a lot of folks selling these lately.
Curious minds would like to know why.
I expect they are lots from telecom providers who are are replacing kit
that is being upgraded.
I don't see any date codes on the boxes. Has anyone
Le 16/11/2011 18:33, Chris Albertson a écrit :
On Wed, Nov 16, 2011 at 7:03 AM, David J Taylor
david-tay...@blueyonder.co.uk wrote:
A pity that there isn't a port of the reference NTP for the Mac, such as we
have on Windows.
As I remember you simply compile NTP on the Mac and it just worked.
Le 16/11/2011 18:42, mike cook a écrit :
Le 16/11/2011 18:33, Chris Albertson a écrit :
On Wed, Nov 16, 2011 at 7:03 AM, David J Taylor
david-tay...@blueyonder.co.uk wrote:
A pity that there isn't a port of the reference NTP for the Mac,
such as we
have on Windows.
As I remember you simply
Le 20/11/2011 23:57, Hal Murray a écrit :
Perhaps if enough funding can be obtained repeating the measurments between
three or more stations (with diferent distances between them but similar
equipment at each site) might eleminate some of the ambiguity. Being able
to compare the measurements
Le 21/11/2011 09:49, Hal Murray a écrit :
michael.c...@sfr.fr said:
I heard on the BBC the other day that a repeat experiment is planned,
firing neurinos from the US into Canada. The labs were not cited, but I
expect it would be Fermilab to Sudbury Ontario. If this is the case, then
there
Le 22/11/2011 01:28, Joe Leikhim a écrit :
Fear Uncertainty and Doubt from Wireless For America dot Org (AKA
Lightsquared) . Approved by Republican and Democratic Regulators.
http://www.youtube.com/watch?v=HyyDIk8W6Kw
Local wireless networks are already in use here in France to cover areas
Le 29/11/2011 10:08, Mark C. Stephens a écrit :
Hi All, Risking opening a potential can of worms, has anyone have a specs
roundup of GPSDO?
Ideally, Maximums of Phase noise, Jitter, accuracy...
lots of great stuff at leapsecond.com
___
time-nuts
Le 02/12/2011 01:53, Bob Camp a écrit :
Hi
Ok, 62.5 ppb at 1 second would be 62.5 ns. that sounds right for a 16 MHz clock.
Your accuracy will be related to the offset between the two 1 ops events
(divided TCXO and GPS PPS) and the accuracy of your crystal.
With some luck you can get the
Le 15 déc. 2011 à 23:24, Azelio Boriani a écrit :
There are GPS simulators for lab use (never seen live or in a picture), I
suppose they have one connector to feed the GPS receiver antenna.
Generating in one equipment all the signals you don't need many but only
one precise timing source.
Le 15 déc. 2011 à 23:57, Peter Gottlieb a écrit :
Just watch how GPS stuff will get all restricted now.
Too late, Simulators are on paybay now. Just need deep pockets.
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I wonder how long it will be before we see Brinks vans, Ferrari's and other
more mundane GPS dependent things being hijacked. Possibilities seem limitless.
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Le 18/12/2011 20:40, Poul-Henning Kamp a écrit :
In message4eee405b.3050...@pacific.net, Brooke Clarke writes:
DO NOT REPLY TO THIS MESSAGE HERE.
s/REPLY TO/POST/ ?
Talk about being totally of-topic for time-nuts...
maybe Time's running short was his trigger.
Le 19/12/2011 06:47, Perry Sandeen a écrit :
Is a 10 MHz or so crystal on the horizon?
Dunno, but some 10-50MHz TCXO/VCTCXO are now available in 2mm
packages, so why not. There might be battery longevity issues with
driving the higher frequency. I guess it comes down to whether the
Le 21/12/2011 10:53, Attila Kinali a écrit :
On Tue, 20 Dec 2011 13:12:13 +1100
Jim Palfreymanjim77...@gmail.com wrote:
Why don't they build a watch that measures the temperature and every time
you accurately set it, it adds to a small database of time change v
temperature and then adjusts
Le 26/12/2011 21:31, Hal Murray a écrit :
I turned on a Z3801 that had been idle for a while. The status screen said:
UTC 20:03:44 [?] 11 May 1992
That looks like 1024 weeks (19.7 years) ago.
When I first turned it on, before finding any satellites, it said:
UTC 12:05:00 [?]
Hi,
Just got my cheapo 5680A. It was accompanied by a little teddy bear
clutching a L7805CV !
Got a couple of questions.
1) What is the expected 10MHz peak to peak voltage. FEI doc seems to
indicate 0,5V but I am getting only 200mv.
2) What is the sensitivity to 15V input level. I am only
Le 29/12/2011 09:28, Chris Albertson a écrit :
1) What is the expected 10MHz peak to peak voltage. FEI doc seems to
indicate 0,5V but I am getting only 200mv.
I'm getting a lot more, about 2V peak to peak. What are you loading it
with, I'm using a 10X scope probe. How are you measuring the
Mine was slow, but I expected it. 25/11-28/12.
Le 30/12/2011 11:30, Rob Kimberley a écrit :
I bought a couple of these on EBay recently. Would like to know from the
group what the typical shipping times have been so far from China.
Cheers
Rob Kimberley
Le 02/01/2012 13:44, Robert Atkinson a écrit :
Hi Jim,
Well done, on the parking. Earlier this year I noticed that a new pay and
display meter in the city center (Cambridge UK) has what appears o be a GPS patch
antenna on top. Presumably a GPS receiver is cheaper than manually setting time or
Le 04/01/2012 02:58, Brian, WA1ZMS a écrit :
My E-bay FE-5680A finally arrived. (4weeks later)
Of the pins on the DB-9 connector, which one is the RF output?
The manual only talks about an SMA output.
It may depend on the version as there are lots.
If you have the cheapo 30352-1 part
Le 04/01/2012 09:58, Hal Murray a écrit :
Neat. Thanks for sharing.
With a XOR, you can't tell which input is higher frequency. I think you can
fix that with a second XOR and a delay line.
I think 90 degrees of delay will provide the most information. At 10 MHz,
that's 25 ns. I think
Le 06/01/2012 17:02, Chuck Forsberg WA7KGX N2469R a écrit :
The Tech Manual does not call for heat sinking (unless I missed
something).
The top has labels over much of the surface.
The bottom has a plastic sheet between the circuitry and bottom plate.
Yes, I am inclined to agree as I suspect
Le 06/01/2012 18:05, David a écrit :
Yes, I am inclined to agree as I suspect these devices were designed to
run in uncontrolled temperature environments.
Maybe the test would be to measure the current draw over temperature,
when the box thinks it is warm enough it will stop heating the cell
Le 11/01/2012 19:24, Chuck Forsberg WA7KGX N2469R a écrit :
The FE-5680A 1pps is not sync'd to UTC.
According to my calculations, it would take several hours
to walk the 1pps to UTC given the 3.8e-5 adjustment
range via the RS232 input. A thunderbolt, an arduino,
and patience.
You don't need to
Le 11/01/2012 19:36, mike cook a écrit :
Le 11/01/2012 19:24, Chuck Forsberg WA7KGX N2469R a écrit :
The FE-5680A 1pps is not sync'd to UTC.
According to my calculations, it would take several hours
to walk the 1pps to UTC given the 3.8e-5 adjustment
range via the RS232 input. A thunderbolt
Le 18/01/2012 23:41, Mike S a écrit :
So, I'd still like to know who says don't use TAI, and for what reason.
I'm not sure anyone says don't use TAI. What they say is that you
can't use TAI because it is not disseminated , unlike UTC(k).
UTC has the same rate as TAI , so we have a source of
Le 19/01/2012 01:04, Mike S a écrit :
On 1/18/2012 6:15 PM, mike cook wrote:
I'm not sure anyone says don't use TAI. What they say is that you
can't use TAI because it is not disseminated , unlike UTC(k).
UTC has the same rate as TAI , so we have a source of Si ticks, but TAI
Le 19/01/2012 21:55, k4...@aol.com a écrit :
Last time I checked (first of this week) subframe 4 of page 18 in the
data stream from the GPS satellites, they are not indicating there is
a pending leap second. Last time there was a leapsecond (couple years
ago), I think the GPS SV's were
Le 20/01/2012 09:37, Attila Kinali a écrit :
On Thu, 19 Jan 2012 10:02:56 +0100
mike cookmichael.c...@sfr.fr wrote:
H (from a time serf). Some labs provide UTC(k) but do not generate
a TA(k) , maybe as there not enough clocks available. Some UTC(k)
providers have only one clock,.
This
Le 20/02/2012 07:18, Bill Woodcock a écrit :
Murphy says we won't. Bell curve, again. A very few will have good symmetric
paths to Stratum-1 servers, most will have mediocre asymmetric paths, and some
will have nothing usable at all.
Are you targeting homes, offices, or machine rooms?
The
Le 24/10/2010 22:50, Mark J. Blair a écrit :
On Oct 24, 2010, at 1:44 PM, Richard H McCorkle wrote:
The disease will continue to progress until
ultimately all of the patients personal time and money are
exhausted or they die.
A nut in the final stages of the disorder would request to be
looks like this might run...
I would say that all the values are valid , but agree that the overall
confidence in the performance couldn't be better than the worst case. I
have noticed that I never get the same ADEV values on successive runs
but put it down to an undisciplined thermal
pps1 - cuau1 should do it. I am running 6.2 where pps1 - cuad1
works fine.
Le 01/11/2010 16:28, Mike S a écrit :
I'm putting together an NTP server on a Soekris NET4501, using an
Oncore M12+. I can't get the Atom PPS refclock to load, it reports
refclock_atom: time_pps_create failed:
Le 09/11/2010 06:50, jim s a écrit :
The other thing I didn't state was that I got the USB receiver out of
a discard frenzy at the place I'm working, and got it to work with a
freebe program on windows XP. It's a Holux GM-210.
They do make an RS232 version, but I got the USB one. It
:) Shame he didn't get the start time correct.
Le 17/11/2010 15:15, Collins, Graham a écrit :
I found today's November 17, 2010 Dilbert rather funny.
http://www.dilbert.com/
cheers, Graham
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To
for use as
an NTP source I inadvertently put pressure on that wire and ripped off the
board trace. So my NTP source has been relegated to parts.
Maybe better to have the wire running on the top.
Joe Gray
W5JG
On Nov 25, 2014 9:15 AM, Mike Cook michael.c...@sfr.fr wrote:
You may have
There has recently been comments on the COM port allocation in relation to the
LTE-Lite project which reminded me that I have seen an issue trying to run
multiple instances of the uCenter software in order to monitor/configure
multiple uBlox receivers at the same time. Unfortunately only one
Le 30 nov. 2014 à 22:53, Hal Murray hmur...@megapathdsl.net a écrit :
michael.c...@sfr.fr said:
There has recently been comments on the COM port allocation in relation to
the LTE-Lite project which reminded me that I have seen an issue trying to
run multiple instances of the uCenter
Hi Tom,
I would certainly be interested. I have 4 receivers that I would like to add
that feature to. I was thinking of also trying the technique with other
receivers, such as Trimble Jupiter/SMT or newer Ublox which provide
quantization data so I was thinking of a more generic serial/PPS
Le 10 déc. 2014 à 19:55, Laszlo Hanyecz las...@heliacal.net a écrit :
Time-nuts,
Is it a bad idea to have more than one PPS source on a single machine? Would
this cause additional jitter when trying to compare the timestamps on two
sources? I understand that USB can't deliver a real
Le 11 déc. 2014 à 05:47, Brian Lloyd br...@lloyd.aero a écrit :
On Wed, Dec 10, 2014 at 10:15 PM, Chris Albertson albertson.ch...@gmail.com
wrote:
Those sub 1 u-second numbers are very good. They argue for using the BBB
as an NTP server but I wonder if it really is the best. I think
I personally have found eBay notably unhelpful in cases where illegal or
unethical practice are reported.
As an example, four or five years ago I found a Spanish seller selling a lens I
have in my collection, same serial number, same photo that appeared on eBay
when I bought it some months
seriously now. I must admit
that the lack of positive action at the time made me think it’s a waste of time
reporting anything.
On Sat, Dec 13, 2014 at 4:02 AM, Mike Cook michael.c...@sfr.fr wrote:
I personally have found eBay notably unhelpful in cases where illegal or
unethical practice
Le 14 déc. 2014 à 10:02, Dr. David Kirkby (Kirkby Microwave Ltd)
drkir...@kirkbymicrowave.co.uk a écrit :
Both my computers run Solaris.
* One, a Sun Ultra 27 has a Xeon processor, no serial ports, but I do have
a good quality USB serial adapter for it.
* The other, a Sun Blade 2000,
I compared results from many different timing receiver surveys (VP,
UT+,Resolution-T,SMT, Jupiter , that of LH for my T-Bolt, Ublox-6T) with the
Google Earth position and with the exception of the Ublox receiver they are all
within the bounds of the GE uncertainty which is around 2m from the
Le 23 déc. 2014 à 01:41, Ryan Stasel rsta...@uoregon.edu a écrit :
Ed,
Not 100% sure this is the same model, but it would seem to indicate there's a
PPS signal on the DCD pin (from the gpsd-users list circa 2007):
http://marc.info/?l=gpsd-usersm=118340900010559w=2
Have a 'scope to
I have had a look at the NTPns package and I don’t think that you will be able
do what you want without something naming the seconds. As you have GPSDO’s to
give you UTC aligned seconds you may be able to use the voice time service TIM
to help you manually set the system clock to the nearest
Le 28 déc. 2014 à 08:16, David J Taylor david-tay...@blueyonder.co.uk a
écrit :
Thanks to Mike to his observations on the driver - using stock NTP would be
easier except that as a Windows person I would be lost (or very slow and
incompetent) at building a NanoBSD image myself).
You
Just to let you know that I received my replacement NS-T receiver and verified
that that problem is fixed.
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units. Now it does not.
On Mon, 26 Jan 2015 22:59:36 +0100, Mike Cook wrote:
Yes there is certainly an error here:
With my timing module I was just eyeballing the output on a windows platform
, comparing GUI data.
I have just linked the module up to a BeagleBone Black syncG�d with NTP
Yes there is certainly an error here:
With my timing module I was just eyeballing the output on a windows platform ,
comparing GUI data.
I have just linked the module up to a BeagleBone Black sync’d with NTP and this
is the NMEA msg log:
root@bb3:/home/mike/serial-ports# while read GGA; do echo
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