The problem with both of those is that the Linux machines are all
going to want the PPS to be conected to the DTR pin of a serial port
and for that you need rs-232 levels with wides plus and minus volts.
TTL level or wose is not going to work.
[]
Chris Albertson
Redondo Beach, California
In
C BlacK rb...@non.net wrote in message
news:g6kdnaptj_xcfwrqnz2dnuvz_okdn...@supernews.com...
For our discussion, lets say there are many machine but the distance is
not going to me more that 100ft.
Then some top-of-the head sums might be:
100 machines - RS-232 input resistance, guess, 4K,
The new firmware for GPS 18x PC/LVC is also available:
https://buy.garmin.com/shop/store/downloadsDetails.jsp?id=4055product=010-00321-51cID=170pID=223
Changes made from version 3.60 to 3.70:
Improved NMEA output timing stability.
Added support to enable/disable velocity threshold filtering.
Chuck Swiger wrote:
TTL voltage swings rather than needing the +/- 3V minimum of RS-232;
they also are in-spec with up to ten receivers on the line.
The +/-3V monotonic swing is a requirement on the driver, not the
receiver; the transition region requirement for the receiver is much
Eugen COCA ec...@eed.usv.ro wrote in message
news:daa8a19f-fed1-4ded-84cd-d87785b42...@c41g2000yqm.googlegroups.com...
The new firmware for GPS 18x PC/LVC is also available:
https://buy.garmin.com/shop/store/downloadsDetails.jsp?id=4055product=010-00321-51cID=170pID=223
Changes made from
On 2011-06-14, Stephan Skrodzki skrod...@stevekist.de wrote:
Am Dienstag, den 14.06.2011, 16:16 + schrieb unruh:
On 2011-06-12, chipper bl...@intre.nt wrote:
If I wanted to feed a group of linux machine from a common PPS source,
what hardware and which Linux would I need?
An
On 2011-06-14, David Woolley david@ex.djwhome.demon.invalid wrote:
unruh wrote:
(or rather impedance matching chip) and some lines (eg 50 ohm cat5
Cat 5 is at least 100 ohm.
Oops you are right. It is 100 ohm, not 50. (memory...) So if you have a
loger run ( 30m) you had better make sure you
On 2011-06-14, Chris Albertson albertson.ch...@gmail.com wrote:
http://www.ptsyst.com/TT-10188-B.pdf
http://www.tapr.org/kits_tadd-3.html
The problem with both of those is that the Linux machines are all
going to want the PPS to be conected to the DTR pin of a serial port
and for that you
John Hasler wrote:
David Woolley writes:
Cat 5 is at least 100 ohm.
100 ohms +-5 ohms at 100MHz. For 50 ohms parallel two of the pairs.
just use one 100 ohms pair.
turns per distance tend to be different for each pair.
uwe
___
questions
Dear all,
I'm using an SNTP Server in a local subnet without any reference time
synchronisations. The SNTP Server is implemented by myself and on the
local subnet it is Stratum 1 and the Reference-ID in the SNTP-Package is
LOCL (Local uncalibrated clock).
The SNTP Server implementation
Hi All,
I am using ntp package ntp-4.2.4.tar.gz
I want to run ntp client in multicast client mode and i added following line
in ntp.conf file :-
*multicastclient ff05::101*
But it seems there is no multicast socket opened on 123.
ntp logs show following :-
*addto_syslog: getaddrinfo: ff05::101
Hans Peter wrote:
I'm using an SNTP Server in a local subnet without any
reference time synchronisations.
The SNTP Server is implemented by myself and on the
local subnet it is Stratum 1 and the Reference-ID in
the SNTP-Package is LOCL (Local uncalibrated clock).
The SNTP Server
David J Taylor wrote:
C BlacK rb...@non.net wrote in message
For our discussion, lets say there are many machine
but the distance is not going to me more that 100ft.
Then some top-of-the head sums might be:
100 machines - RS-232 input resistance, guess, 4K,
all 100 in parallel 40 ohms.
A
E-Mail Sent to this address will be added to the BlackLists
Null@BlackList.Anitech-Systems.invalid wrote in message
news:itauip$4v0$1...@dont-email.me...
David J Taylor wrote:
C BlacK rb...@non.net wrote in message
For our discussion, lets say there are many machine
but the distance is not
C BlacK wrote:
For me track closely would be no more than 25us
(micro seconds of a ntp server)
Last I heard, that was doable with NTP,
if you use BSD for the OS.
--
E-Mail Sent to this address blackl...@anitech-systems.com
will be added to the BlackLists.
On 06/15/2011 08:10 AM, David J Taylor wrote:
http://www8.garmin.com/support/agree.jsp?id=4065utm_source=feedburnerutm_medium=feedutm_campaign=Feed%3A+garmin%2FVKiE+%28Garmin+|+Software+Updates%29
Although for the 5Hz model, GPS 18x 5Hz, this firmware update includes:
* Improved NMEA
On Wed, Jun 15, 2011 at 2:28 PM, E-Mail Sent to this address will be
added to the BlackLists Null@blacklist.anitech-systems.invalid
wrote:
C BlacK wrote:
For me track closely would be no more than 25us
(micro seconds of a ntp server)
Getting to 25us on a local 100BaseT Ethernet is
On 2011-06-15, Atul Gupta atul14.ku...@gmail.com wrote:
I am using ntp package ntp-4.2.4.tar.gz
This release is older than you think.
The current stable is ntp-4.2.6p3
ntp-4.2.4 == NTP-4 v2.4
ntp-4.2.6p3 == NTP-4 v2.6.3
I want to run ntp client
There is no ntp client. Either you're
Hi Steve,
Thanks for your response.
Its difficult for me to move to ntp-4.2.6p3.
Does ntp-4.2.4 doesn't support ipv6 ? I have seen the release notes and it
says that it does support.
Do i need to configure with some option to enable ipv6 multicast support?
Thanks,
Atul.
On Wed, Jun 15, 2011 at
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