Device Mangler just reports the standard MS driver for that port, also
not reflecting the actual currently in use baud rate settings either, so
nothing new there. (I've never yet seen that tool actualy reflect what
the actual conditions are, on 2k or XP!)
Then the device driver isn't
Your confused!...
How are you getting to those driver display details?
In Win2k, I'm going in via the control panel, system, then device
manager.
In there, expand the Ports (COM and LPT) selection, select Com2 (the
one with the GPS) right click, Properties, Driver, Driver details.
Harlan Stenn st...@ntp.org wrote in message
news:ywn9oclt49tl@ntp1.isc.org...
David,
Yes, the content could easily be improved. And it's a wiki.
I would have a go at that, but as I am uncertain about things myself, it
won't be until after those more knowledgeable folk have explained
Hi All..
[]
Re the status column in the 'NTP Status' tab.
[]
But what does 'o' mean?
o - appears to mean - synced to the atom (PPS) driver, which is
filtering the clock from the * source.
[]
The Application Log shows:-
Using user-mode PPS timestamp for GPS_NMEA(2) Not that I think it'll
Terje Mathisen terje.mathi...@tmsw.no wrote in message
news:a5mdnvwbf93ka7twnz2dnuvz8qxi4...@lyse.net...
David J Taylor wrote:
The command:
ntpq -c rv
returns a set of data, including the version of NTP in the format:
version=ntpd 4.2.6-o
I would like to retrieve the same information
Martin Burnicki martin.burni...@meinberg.de wrote in message
news:ttopv6-o6q@gateway.py.meinberg.de...
[]
some time ago one of my colleagues has picked up the source code of ntpq
and
applied some modifications and extensions so that he could build a DLL
which provides the functionality
Harlan Stenn st...@ntp.org wrote in message
news:ywn9iqc5u7ww@ntp1.isc.org...
Using 4.2.6, run a tcpdump against the conversation of:
ntpq -c 'rv 0 version'
Thanks for the suggestion, Harlan. I managed to use Wireshark to do that
against: ntpq -c rv which brought me back more
Use wireshark again and capture this:
ntpq -crv; ntpq -c'rv 0 version'
Then compare both request packets. The difference should be obvious.
Thanks, Steve. Yes, I already did that, and decided to leave the fuller
exchange. I've not had the need to use Wireshark before, and it even
worked
The command:
ntpq -c rv
returns a set of data, including the version of NTP in the format:
version=ntpd 4.2.6-o
I would like to retrieve the same information (just the version field)
using a UDP interchange with the server rather than running the ntpq
command. Could anyone advise what
Martin,
I've added a test to my program to see whether the value from
GetSystemTimeAsFileTime ever steps backwards, and it hasn't done so in
my testing so far. So I remain unsure why, on a system without the
interpolation code, I'm seeing the TX time before the RX time.
Certainly would
...an agreement that paves the way for the launch of a high-accuracy
atomic clock to be attached to the outside of the European Columbus
laboratory onboard the International Space Station (ISS).
See more:
http://www.esa.int/esaCP/SEMRDI9K73G_index_0.html
David
Martin Burnicki wrote in message
news:ipkhv6-f29@gateway.py.meinberg.de...
[]
The Windows API call used to slew the system time reports a standard
tick
rate of 15.6001 on a Vista machine here even if the time returned by a
loop
of GetSystemTimeAsFiletime() calls increments in 1.000 ms
Martin Burnicki wrote in message
news:ipkhv6-f29@gateway.py.meinberg.de...
[]
If you send me that program (or a link to it) I can give it a try.
Martin
Martin, I've just e-mailed:
- the program
- its source (Delphi 2009)
- the results from log_adj on the two PCs in case you can see
G8KBV g8...@nospam-uko2.co.uk wrote in message
news:mpg.258e12bfc938897b989...@news.demon.co.uk...
[]
Hi David..
OK on all that (4800 bd etc) I too at the moment run NTPD etc on a
lightly loaded machine. P4 1G 512Meg, not a lot else running other
than the Win 2k system. I've got the reg'
Dave Hart wrote in message
news:98c443b7-15b4-4472-b985-9c3e99788...@j9g2000prh.googlegroups.com...
[]
The fact that is working despite the 1ms system clock means I don't
understand the breakage as well as I thought, and hints of a
possibility interpolation could be made to work on more or
Folks,
[Posted to NTP Hackers, but no reaction there as yet]
I've written a small program which sends some SNTP packets to various NTP
servers on my LAN, and looks at the timestamps which the server adds as
its RX and TX times. With Windows-7 and Vista I'm seeing some odd
results. I'm
Dave Hart wrote in message
news:d0a8b639-0e8c-435b-992b-7b91e2d56...@13g2000prl.googlegroups.com...
[]
If you are using ntpq from a script, please don't scrape the billboard
for information. It's designed for human consumption, and ntpq
provides all the same information and more via
Martin Burnicki martin.burni...@meinberg.de wrote in message
news:s9u9v6-gj3@gateway.py.meinberg.de...
David,
David J Taylor wrote:
Folks,
[Posted to NTP Hackers, but no reaction there as yet]
I've written a small program which sends some SNTP packets to various
NTP
servers on my
Dave Hart daveh...@gmail.com wrote in message
news:fef13ab0-a7ca-479b-9f8f-5281fdaf7...@m7g2000prd.googlegroups.com...
On Dec 11, 16:26 UTC, David J Taylor wrote:
The Windows-7 with the reference clock interests me - it's as if the
packet timestamps are being derived in a completely different
unruh un...@wormhole.physics.ubc.ca wrote in message
news:slrnhi57dp.iod.un...@wormhole.physics.ubc.ca...
[]
And given these results would the advice given by some in this list
to go ahead and use Windows as a time server still stand?
(Of course it depends on the accuracy required. For 1 sec
Martin Burnicki martin.burni...@meinberg.de wrote in message
news:s9u9v6-gj3@gateway.py.meinberg.de...
[]
On the other hand, I've also seen systems where the interpolated time
steps
back and forth by 1 ms, due to the time passed by Windows to the timer
APC
callback steppingby 1 ms. I
Dave Hart wrote in message
news:cb83daad-6ea3-43dd-842b-b798ac9a0...@z4g2000prh.googlegroups.com...
[]
I have uploaded x86 Windows binaries for 4.2.6 to my website.
[]
Cheers,
Dave Hart
Thanks for that, Dave. Those binaries are running apparently correctly on
the five PCs where I've loaded
David Woolley da...@ex.djwhome.demon.invalid wrote in message
news:hfiddi$qc...@news.eternal-september.org...
[]
I think he was really asking about the parameters that you log and how
you get them from ntpd.
He is using ntpq to fetch the offset value. If ntpd is working well,
this will be
New data from a Windows Vista system also shows 4.2.5 as performing worse
than 4.2.4:
http://www.satsignal.eu/ntp/V4.2.4.vs.V4.2.5.html
Cheers,
David
___
questions mailing list
questions@lists.ntp.org
Dave Baxter s...@goes.nowhere.com wrote in message
news:mpg.25871af0923a862f989...@news.btopenworld.com...
[]
Hi again.
Well, after spending a lot if time reading (while sniffing) again, and
restarting from zero (again!) I seem to have the Meinberg Windows port
of NTPD etc working as a
Dave Hart wrote in message
news:b51e46f7-4b0d-4d40-a6b2-574d459ba...@s21g2000prm.googlegroups.com...
[]
If we wanted to define a new Windows-only service provided by ntpd,
sure, there could be some combination of shared memory and IPC objects
like named events used to expose a way for another
NTP Public Services Project webmas...@ntp.org wrote in message
news:mailman.2.1259616688.625.annou...@lists.ntp.org...
Redwood City, CA - 2009/11/30 - The NTP Public Services Project
(http://support.ntp.org/) is pleased to announce that NTP 4.2.5p250-RC,
a Release Candidate of the NTP
Steve Kostecke wrote in message
news:slrnhhnbad.o4k.koste...@stasis.kostecke.net...
On 2009-12-06, David J Taylor david-tay...@blueyonder.co.uk wrote:
I have chosen not to install it on one other Windows-7 system (Hydra)
and the performance of 4.2.5 is rather worse than 4.2.5.
???
See
Richard B. Gilbert rgilber...@comcast.net wrote in message
news:1v6dna7zusjmtobwnz2dnuvz_rwdn...@giganews.com...
David J Taylor wrote:
Steve Kostecke wrote in message
news:slrnhhnbad.o4k.koste...@stasis.kostecke.net...
On 2009-12-06, David J Taylor david-tay...@blueyonder.co.uk wrote:
I
Steve Kostecke koste...@ntp.org wrote in message
news:slrnhhnlsn.95p.koste...@stasis.kostecke.net...
[]
4.2.5 is worse than 4.2.5 ?
Well, if you insist, it could have been that 4.2.5p233 was worse than
4.2.5p232 because it failed under strange circumstances with Windows
Vista, but as Bill
David Woolley da...@ex.djwhome.demon.invalid wrote in message
news:hfgvt5$g6...@news.eternal-september.org...
David J Taylor wrote:
Stated requirement:
- around 1 millisecond (on Window 2000 or XP IIRC).
Observed performance examples:
These don't tell you the jitter due
Why Tea ytl...@gmail.com wrote in message
news:42f094fd-c09f-4e4b-9ee8-ab2b843e1...@k13g2000prh.googlegroups.com...
[]
1) Has anybody used Windows 2003 as an ntp server and
is happy/unhappy with it?
I am happy with Windows 2000 and Windows XP - Windows Server 2003 is a
hybrid of those OSes
nemo_outis a...@xyz.com wrote in message
news:xns9cd8ac8074753pqwer...@69.16.185.250...
[]
Overkill is bad engineering and bad ethics.
Regards,
Suggesting that there is no need to install an extra Linux machine if
Windows can keep time well enough for the job in hand.
Cheers,
David
Dave Baxter s...@goes.nowhere.com wrote in message
news:mpg.2582f2d76a9bb78e989...@news.btopenworld.com...
[]
Hi...
First, thanks for the direct email, I'll look at things in detail again
this evening/over the weekend.
[]
Your sumizing above, is exactly what I'd like to do, idealy all on one
unruh un...@wormhole.physics.ubc.ca wrote in message
news:slrnhhilur.scb.un...@wormhole.physics.ubc.ca...
[]
Please, do not use a Windows box as your main server. get a cheap ( your
local flea market should have one for $50) computer, install linux or
freebsd, purely for running ntp on it, and
jack wrote in message
news:edbf7025-8578-48f5-b714-3a06b5c3c...@c34g2000yqn.googlegroups.com...
David,
I totally agree with you. My main application runs on Windows for
various reasons (cheap hardware for one) and had been using PCI IRIG
board to keep time. I was not merely looking for a
Dave Baxter s...@goes.nowhere.com wrote in message
news:mpg.2581b3818527b329989...@news.btopenworld.com...
[]
Hi..
Back after getting diverted by my central heating system going on the
blink...
Re Faros. Good question, well presented, unknown (exactly) at this
time!
It does run it's
David,
I got this going and everything is working well. However, comparing
NTP time to an IRIG board time with a GPS antenna, I see a difference
of 100ms. Not sure where this came from.
Jack
Good question! What is the pulse-length of your GPS PPS, and to which
edge is NTP syncing?
Why Tea wrote in message
news:e8c2bbf4-c637-4ea7-bb06-33e44da1f...@z4g2000prh.googlegroups.com...
Can Windows 2003 server be used as an NTP server
within an organization? The info from Wikipedia seems
to suggest NO (http://en.wikipedia.org/wiki/Network_Time_Protocol).
Did anybody have any
Redwood City, CA - 2009/11/30 - The NTP Public Services Project
(http://support.ntp.org/) is pleased to announce that NTP 4.2.5p250-RC,
a Release Candidate of the NTP Reference Implementation from the
NTP Project, is now available at http://www.ntp.org/downloads.html and
Dave Baxter g8...@nospam.uko2.co.uk wrote in message
news:mpg.257f313bfbd49ce989...@news.demon.co.uk...
[]
Is there a blow by blow (with screenshots?) description as to how to put
all this together anywhere? David Taylor's site gets close, but I
suffer informaion overload after a while.
Dave Baxter g8...@nospam.uko2.co.uk wrote in message
news:mpg.257f2d55775bad5a989...@news.demon.co.uk...
[]
Hi David...
I'll put the BSOD details in another post, beneath David Harts post, to
keep the tree branches sane...
You did help me out a while back, by pointing me at the exact same
jack wrote in message
news:72491452-f89d-454b-8bcc-f945c8259...@j19g2000yqk.googlegroups.com...
David,
I would like to add that, from my own experiences, the GPS has to be
configured to output $GPRMC sentences only. Otherwise the PPS part of
NTP doesn't work.
Good point - added.
I have a
David,
I looked at timeGetTime() and I found it only gives out relative time
(since Windows was started). Is it possible to query NTP server to get
an accurate starting time?
jack
As Dave Hart says, you would need to do a network transfer to get the time
from NTP - that's a bit of a pain
Internal serial cards seem like an inexpensive way to add a serial port
for a GPS connection - do people use them for NTP?
e.g.
StarTech.com 1 port Native PCI Express RS232 Serial Adapter Card with
16550 UART - Serial adapter - PCI Express x1 - RS-232
Manufacturer Part : PEX1S552
Dell
Dave Baxter g8...@uko2.co.uk wrote in message
news:mpg.257e5228127dac81989...@news.demon.co.uk...
[]
Hi.
I'm also trying to get this working, haveing failed miserably with the
FreeBSD system (it would never seem to respond to the GPS, and as I
don't know squat about 'BSD, decided to revert
Just to let everyone know that the u-blox GPS works well now. The
offset is 0.02ms with jitter at 0.002ms. My other GPS with only USB
out has an offset of 5ms and jitter of 2.5ms.
Jack
Good news, Jack. For comparison, my own tests with a serial to USB
converter (Sitecom) which did include
jack wrote in message
news:484bcf3e-dde5-4978-966d-5637918c9...@l35g2000vba.googlegroups.com...
David,
Would you mind looking up the model number of the Sitecom serial to
USB converter that has the DCD line? I am very interested in a
solution like that.
Jack
Jack, the convertor I had was
Unruh unruh-s...@physics.ubc.ca wrote in message
news:e5_pm.33822$cd7.2...@newsfe04.iad...
[]
I think you mean 10s of msec to 1s of microseconds. If you do not need
it, certainly using a separate computer would be overkill. If you need
it, then presumably you have to factor in the costs and
Martin Burnicki wrote in message
news:em22u6-ruq@gateway.py.meinberg.de...
[]
From the original question I'd understand that Juan expected the system
time
to be *set* once after each poll in 5 minute intervals. Of course ntpd
doesn't work this way, but if you force the minpoll value
Martin Burnicki martin.burni...@meinberg.de wrote in message
news:9732u6-r9s@gateway.py.meinberg.de...
[]
Please remember PPS support under Windows is only available in current
development versions which will becomt the next release soon. However,
ntpd
v4.2.4p7 which is still the current
jack j.jack.w...@gmail.com wrote in message
news:54ad71bf-d76a-47c1-a0b7-df492d9ed...@m38g2000yqd.googlegroups.com...
Hi all,
I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can
verify that the GPS is outputing $GPRMC strings at 1Hz with some other
strings occasionally (eg
jack wrote in message
news:c9339bbd-a773-44dc-92af-261308e3e...@31g2000vbf.googlegroups.com...
David,
I read instructions on your web site especially the section on USB GPS
receivers. Version 4.2.4 dated March 15 2009 is the latest on Dave
Hart's website. Why do you get 4.2.5 from?
jack
jack wrote in message
news:7a8980f8-5cbc-4100-9d84-2d5e2a93c...@e27g2000yqd.googlegroups.com...
David,
I switched to a machine with an RS232 port and also found version
4.2.5. NTP now opens port COM1 with no problem. However, status shows
that it doesn't seem to be reading from GPS since
David Woolley da...@ex.djwhome.demon.invalid wrote in message
news:hen3cv$ni...@news.eternal-september.org...
jack wrote:
I am trying to setup NTP on Windows XP with a USB GPS at COM1. I can
You are making life difficult. Without PPS, GPS has poor accuracy, and
potentially high jitter.
jack wrote in message
news:9db25657-9837-4ebe-ab32-ce15ae968...@j35g2000vbl.googlegroups.com...
David,
I only have the following in the configure file:
server 127.127.20.1 minpoll 4 prefer
I found the following entry in the log file:
Using user-mode PPS timestamp
Does it mean NTP
JuanFran juanfranciscoj...@gmail.com wrote in message
news:6a4e421a-318b-4fa1-9105-6ef77a861...@p19g2000vbq.googlegroups.com...
[]
Hi! My system should be accurate to within approximately 10
milliseconds .I think forcing upgrade all computers in my LAN at the
beginning should be enough. Thank
JuanFran juanfranciscoj...@gmail.com wrote in message
news:d693971e-be41-4a9b-9926-ed4a04f5b...@j9g2000vbp.googlegroups.com...
Good mornig. I have a trouble with NTP. I want a refresh my sistem
clock (client) with a LAN Server each 5 minutes. I don’t know any
parameter of NTP protocol for this
JuanFran juanfranciscoj...@gmail.com wrote in message
news:a26c31ce-d0bc-4fa2-a93b-d6c663a94...@j9g2000vbp.googlegroups.com...
[]
Hello! I work in a project that it need synchronize a LAN for collect
data and images in real time. I need a lot of precision in the
synchronization of all
Ulrich Windl ulrich.wi...@rz.uni-regensburg.de wrote in message
news:874op0szuz@pc9454.klinik.uni-regensburg.de...
David J Taylor
david-tay...@blueyonder.not-this-part.nor-this.co.uk.invalid writes:
[...]
Ulrich,
So machine running other than Windows don't suspend? In any case
My problem is a client with several systems using a single GPS-based
NTP server.
[]
What I want is a client to poll the NTP server (say once per second)
and log the time received. A simple perl script can then look for any
large jumps in the recorded time. This will tell me if the NTP server
David Woolley wrote in message
news:hda3tb$j1...@news.eternal-september.org...
[]
Looking at the graphs, one needs the first derivative of the rate, as
well.
Loopstats are available here:
http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#loopstats
Cheers,
David
David Woolley da...@ex.djwhome.demon.invalid wrote in message
news:hd8j1u$ou...@news.eternal-september.org...
David J Taylor wrote:
http://www.satsignal.eu/mrtg/performance_narvik.php
How much of that offset do you attribute to actual clock error?
If most of it, that graph makes a strong
Unruh unruh-s...@physics.ubc.ca wrote in message
news:6gujm.51215$db2.19...@edtnps83...
[]
a) This is windows.
.. and so more of a challenge to get good timekeeping.
b) Except for the abberation at 12, the offset seems to track the disk
temp.
However, it is not the offset which is
Hal Murray wrote in message
news:v72dnrrfbauf8wvxnz2dnuvz_t5i4...@megapath.net...
NTPD is at its best from about 2300 local time to 0700 local time. The
net quiets down and NTP packets travel with minimal and highly
predictable delays.
Except at 3 AM when the cron jobs go off and warm up the
Unruh unruh-s...@physics.ubc.ca wrote in message
news:6mkjm.51168$db2.25...@edtnps83...
David J Taylor
david-tay...@blueyonder.not-this-bit.nor-this.co.uk.invalid writes:
Hal Murray wrote in message
news:v72dnrrfbauf8wvxnz2dnuvz_t5i4...@megapath.net...
NTPD is at its best from about 2300
Evandro Menezes evan...@mailinator.com wrote in message
news:d9a76148-a9c9-45d5-ac72-4e7588c61...@m7g2000prd.googlegroups.com...
I've come to the conclusion that since NTP doesn't correct for
temperature variations, it's long-term compensation is counter-
productive. Therefore, instead of
David Woolley wrote in message
news:hcnjt3$bq...@news.eternal-september.org...
[]
This is a simple AM detector for the slow code (I don't know if the fast
code is still transmitted). It doesn't phase lock onto the carrier.
The fast code stopped many years ago. October 1998 according to:
Unruh unruh-s...@physics.ubc.ca wrote in message
news:fgmhm.50325$db2.6...@edtnps83...
[]
This is of course all made totally redundant by the GPS time delivery--
even makes up for the transmission delay. It begins to look like like
Morse code in the days of cell phones. Quaint, but not really
Unruh wrote in message news:rl5hm.50089$db2.40...@edtnps83...
[]
As I tried to emphasise, if the round trip is not symmetric, then
neither ntp not
chrony can compensate for that lack of symmetry, and the absolute time
will be
out. If occasionally it has an assymetric round trip, then ntp
Unruh wrote in message news:vcjhm.50153$db2.9...@edtnps83...
[]
UK 60KHz radio time signal.
Ah, OK. Its accuracy is probably not much better than a few msec I
assume.
GPS is a few usec. Since the network gives accuracies of better than a
few ms, MSF
is not a good way of testing the
Unruh wrote in message news:34jgm.50898$ph1.36...@edtnps82...
[]
Note that chrony will give you a factor of 2 or three improvement over
ntp in the errors, assuming that the roundtrip is equally split on
Linux or BSD.
For those without wide-bandwidth academic connections - those folks on
David J Taylor
david-tay...@blueyonder.not-this-bit.nor-this.co.uk.invalid wrote in
message news:%xqgm.126$ym4...@text.news.virginmedia.com...
Unruh wrote in message news:34jgm.50898$ph1.36...@edtnps82...
[]
Note that chrony will give you a factor of 2 or three improvement over
ntp
Unruh unruh-s...@physics.ubc.ca wrote in message
news:qg_gm.50009$db2.46...@edtnps83...
David J Taylor
david-tay...@blueyonder.not-this-bit.nor-this.co.uk.invalid writes:
David J Taylor
david-tay...@blueyonder.not-this-bit.nor-this.co.uk.invalid wrote in
message news:%xqgm.126$ym4
David J Taylor writes:
On consumer-grade circuits the assumption about equal round trip is
unlikely to be valid.
Why would you expect the asymmetry to be worse there than elsewhere?
--
John Hasler
It's just an impression I had - that consumers get the worst latency and
most overloaded
Unruh wrote in message news:kx%gm.50022$db2.12...@edtnps83...
[]
As I said, chrony does a linear regression on the last n offsets.
[]
Bill,
I think we have seen these remarks about chrony before.
What I was wanting was a yes/no answer (although numbers would be nice) to
the question:
- is
David Woolley da...@ex.djwhome.demon.invalid wrote in message
news:hce9je$n4...@news.eternal-september.org...
Could I suggest limiting release candidates to one a week. Very few
people will have time to deal with them in less than about a week.
I'd deduce from the large number of recent
E-Mail Sent to this address will be added to the BlackLists
n...@blacklist.anitech-systems.invalid wrote in message
news:hcf9cc$24...@news.eternal-september.org...
David J Taylor wrote:
perhaps those who don't want to keep them can use the
Delete key?
^W ^W Kill File
Or whatever. Some
Unruh wrote in message news:x06gm.50657$ph1.37...@edtnps82...
[]
In case someone else is reading this and had an interest in setting up a
stratum 1
server, there are off the shelf solutions. The cheapest is a Gamin
18xLVC GPS
receiver, some wiring (soldering in a usb connector and a serial
gizero wrote in message
news:15ced803-8cfb-43f0-8d6a-e700f3b1b...@p23g2000vbl.googlegroups.com...
Hi group users,
I'm writing this, since I am extremely confused about how to configure
network time sync for an embedded system I'm working on.
Possible time sources for the box are:
1.
Folks,
Although it's relatively simple, I've added details about how I use a
Garmin GPX 18x LVC puck directly with the serial port on a PC, and take
the power from a spare USB port. I built a pulse-per-second (PPS)
indicator into the serial port connector so that operation can be
confirmed
Hal Murray wrote in message
news:fjodnd_xpmky0enxnz2dnuvz_jfi4...@megapath.net...
Thanks, Hal. Perhaps I should have been a little more patient! G I
wonder what version of the firmware your unit had?
$PGRMT,GPS 18x-LVC software ver. 2.50*68
It was an early one.
It also seems to
As I haven't yet seen this on the group:
__
The MoD has informed Ofcom of the following GPS jamming exercise:
Dates: 30 November to 4 December 2009.
Times: Up to two one-hour slots per day between 10:00hrs and 16:00hrs.
Location: Within an
Rick Jones wrote in message news:hb06gb$dq...@usenet01.boi.hp.com...
[]
ftp://ftp.cup.hp.com/dist/networking/briefs/nic_latency_vs_tput.txt
is an old writeup, but it should give the gist of it.
Thanks for posting that, Rick, it gave me cause for thought. (In
particular, how Windows Vista /
Hal Murray wrote in message
news:toqdnqikxlyfoe7xnz2dnuvz_vwdn...@megapath.net...
My GPS18x LVC stopped working a couple of days ago. There appears to
+5V
going into the unit, and the serial output is stuck around -5V with no
signs of data on the 'scope. Garmin have accepted the unit back
Kasper Pedersen wrote in message
news:4ad360ef$0$36567$edfad...@dtext01.news.tele.dk...
[]
I built a device that spits out priority tagged ethernet frames with
200ns error to UTC, and did a number of tests with different networks
and nics, the result of which is in a table here:
Unruh unruh-s...@physics.ubc.ca wrote in message
news:ttqam.47651$db2.44...@edtnps83...
[]
USB only has one data line. It cannot do a DCD line except as another
bit of serial data, interleaved with all the other serial data.
Ie, you are not going to get any good signals for an interrupt.
David Lord wrote in message
news:7jen4sf32s09...@mid.individual.net...
[]
The pps via usb doesn't work with NetBSD. That is I believe lack
of hardware interrupt capability via usb. Possibly latest
development pps might work from usb on Linux.
It certainly works on Windows. Is that because
Unruh unruh-s...@physics.ubc.ca wrote in message
news:qsbam.47742$db2.29...@edtnps83...
[]
Actually those Gb ethernet switches seems to have some really bad and
variable
latencies. My system, before they installed Gb switches, had a
consistant
roundtrip of 140 usec and gave better than
David Lord wrote in message
news:7jgd8of35kvm...@mid.individual.net...
David J Taylor wrote:
[]
If the Garmin can deliver +/-5V, it should certainly drive almost any
reasonable RS-232 port. It sounds as if your USB converter has a lower
I doubt now that I tried with the Garmin
Unruh unruh-s...@physics.ubc.ca wrote in message
news:bgjam.47783$db2.3...@edtnps83...
[]
Run the pps into the printer port interrupt instead. I think the
interrupt handler
is better anyway.
(Of course if you have no parallel port this is difficult)
Better? What OS?
David
Unruh unruh-s...@physics.ubc.ca wrote in message
news:fhjam.47784$db2.22...@edtnps83...
[]
Most interesting, Bill. Mine is a relatively cheap and cheerful device
from Netgear (GS608):
http://www.netgear.co.uk/ethernet_network_switch_gs605.php
so whether being very simple and unmanaged is
OT: GPS18x LVC failure
My GPS18x LVC stopped working a couple of days ago. There appears to +5V
going into the unit, and the serial output is stuck around -5V with no
signs of data on the 'scope. Garmin have accepted the unit back for
checking, but I wondered whether anyone else had seen a
David Lord wrote in message
news:7jdsolf35hh6...@mid.individual.net...
[]
Did you try an additional pullup to +5V just in case it's was
internal one that's blown.
David
No, I didn't, David. As the item was about 5 months old, I just carried
out the basic tests and then contacted Garmin.
news.inet.tele.dk s...@kasperkp.dk wrote in message
news:4ad1b84c$0$36560$edfad...@dtext01.news.tele.dk...
[]
I have had two failures on 18x-LVC with fw 3.00.
Both died on the night to 2009.07.03, sitting on the same windowsill.
They were on separate supplies and pieces of equipment.
Neither
Kasper Pedersen s...@kasperkp.dk wrote in message
news:4ad1d1f5$0$36568$edfad...@dtext01.news.tele.dk...
[]
The top dome has two onion rings, the outer being 1mm larger than the
base. The base is a plastic cup, with a groove in the edge, and a rubber
overmold. The top's inner ring fits in
Uwe Klein wrote in message news:1df9q6-or4@klein-habertwedt.de...
David J Taylor wrote:
Inconsistent with the technical specification, which says 0..+5V, but
consistent with what I measured.
Hmm,
RS232 line idle is TX active/high.
TX being inverted that tranlates to nominally -12V
Steve Kostecke koste...@ntp.org wrote in message
news:slrnhd02in.agj.koste...@stasis.kostecke.net...
On 2009-10-10, NTP Public Services Project webmas...@ntp.org wrote:
Redwood City, CA - 2009/10/09 - The NTP Public Services Project
(http://support.ntp.org/) is pleased to announce that NTP
Dave Hart wrote in message
news:6a9bac84-6fc0-4e3c-8431-efcd3ed96...@f20g2000prn.googlegroups.com...
[]
I've posted 4.2.5p231-RC binaries on:
http://www.davehart.net/ntp/win/x86/
They're built with Visual C++ 2008 and have two known limitations:
They will not load on Windows NT 4.0 and
Dave Hart wrote in message
news:6a9bac84-6fc0-4e3c-8431-efcd3ed96...@f20g2000prn.googlegroups.com...
[]
I've posted 4.2.5p231-RC binaries on:
http://www.davehart.net/ntp/win/x86/
They're built with Visual C++ 2008 and have two known limitations:
They will not load on Windows NT 4.0 and
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