Richard B. Gilbert rgilber...@comcast.net wrote in message
news:x_ednyrcxr9hz9tsnz2dnuvz_rcdn...@giganews.com...
[]
Get ready for a shock. NTPD needs thirty minutes or more to get a
reasonable facsimile of the correct time. To get the microseconds
right, NTPD needs more like ten hours! It's
Alby VA wrote:
On Feb 24, 3:07 pm, Chris Albertson albertson.ch...@gmail.com wrote:
On Thu, Feb 23, 2012 at 8:59 PM, Richard B. Gilbert
rgilber...@comcast.net wrote:
Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
obtain a quality motherboard to improve the frequency
Here's an example of retrofitting a better oscillator onto an SBC -- although
this was to enable use of an external standard reference frequency, such as a
GPSDO:
http://www.febo.com/pages/soekris/
John
On Feb 25, 2012, at 1:56 AM, David J Taylor
david-tay...@blueyonder.co.uk.invalid wrote:
On 2/25/2012 2:31 AM, David J Taylor wrote:
unruh un...@invalid.ca wrote in message
news:l9S1r.3578$py5.1...@newsfe09.iad...
[]
The problem is that the relevant temperature is not the room
temperature, but the temperature inside the box at the crystal. That
temp variation is dominated by
On 2012-02-25, Richard B. Gilbert rgilber...@comcast.net wrote:
On 2/25/2012 2:31 AM, David J Taylor wrote:
unruh un...@invalid.ca wrote in message
news:l9S1r.3578$py5.1...@newsfe09.iad...
[]
The problem is that the relevant temperature is not the room
temperature, but the temperature inside
On Sat, Feb 25, 2012 at 21:30, Richard B. Gilbert
rgilber...@comcast.net wrote:
Get ready for a shock. NTPD needs thirty minutes or more to get a
reasonable facsimile of the correct time. To get the microseconds right,
NTPD needs more like ten hours! It's not a very good fit for running 9AM
unruh wrote:
On 2012-02-23, Alby VA alb...@empire.org wrote:
On Feb 23, 4:29?pm, unruh un...@invalid.ca wrote:
No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in computers are not
supposed to be terribly accurate. (They are
On 2012-02-24, Dave Hart h...@ntp.org wrote:
On Fri, Feb 24, 2012 at 02:20, Alby VA alb...@empire.org wrote:
?Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
obtain a quality motherboard to improve the frequency offset?
The gross error of 25 PPM is on the good side. It's
On 2012-02-24, David Lord sn...@lordynet.org wrote:
unruh wrote:
On 2012-02-23, Alby VA alb...@empire.org wrote:
On Feb 23, 4:29?pm, unruh un...@invalid.ca wrote:
No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in computers are
unruh un...@invalid.ca wrote in message
news:20Q1r.6801$ai4.3...@newsfe18.iad...
[]
Do you mean 500PPM?
If you were running linux, you could use the adjtimex program and the -t
or --tick adjustment to change the tick value of your system clock.
each value of 1 adjustment speeds up or slows down
On Thu, Feb 23, 2012 at 8:59 PM, Richard B. Gilbert
rgilber...@comcast.net wrote:
Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
obtain a quality motherboard to improve the frequency offset?
Even if you were to get a higher quality crystal it would still drift
and you'd
On 2012-02-24, David J Taylor david-tay...@blueyonder.co.uk.invalid wrote:
unruh un...@invalid.ca wrote in message
news:20Q1r.6801$ai4.3...@newsfe18.iad...
[]
Do you mean 500PPM?
If you were running linux, you could use the adjtimex program and the -t
or --tick adjustment to change the tick
unruh wrote:
On 2012-02-24, David Lord sn...@lordynet.org wrote:
unruh wrote:
On 2012-02-23, Alby VA alb...@empire.org wrote:
On Feb 23, 4:29?pm, unruh un...@invalid.ca wrote:
No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in
On Feb 24, 3:07 pm, Chris Albertson albertson.ch...@gmail.com wrote:
On Thu, Feb 23, 2012 at 8:59 PM, Richard B. Gilbert
rgilber...@comcast.net wrote:
Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
obtain a quality motherboard to improve the frequency offset?
Even if
Alby VA alb...@empire.org wrote in message
news:05a722ee-0c23-4cb3-877e-7584ce8ad...@do4g2000vbb.googlegroups.com...
[]
Well, I was thinking you could set the crystal off motherboard and
then just runs some wiring back to the connection points where the
crystal would sit. That way shapes and
unruh un...@invalid.ca wrote in message
news:l9S1r.3578$py5.1...@newsfe09.iad...
[]
The problem is that the relevant temperature is not the room
temperature, but the temperature inside the box at the crystal. That
temp variation is dominated by computer use, not outside air
temperature. Thus if
Is there anything wrong with a frequency offset that averages around
-24 to -25 ?
If so, what can I do to correct the problem?
NOTES:
--
godzilla#
godzilla# ntpq -c rl
assID=0 status=0115 leap_none, sync_atomic, 1 event,
event_clock_reset,
version=ntpd 4.2.6p5@1.2349-o Mon Feb 20 22:00:33 UTC
On Feb 23, 4:29 pm, unruh un...@invalid.ca wrote:
No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in computers are not
supposed to be terribly accurate. (They are chosen to be cheap, not
great).
It is because such frequency
On Thu, Feb 23, 2012 at 1:44 PM, Alby VA alb...@empire.org wrote:
When you say crystals used to control the timing in computers,
are you referring to the parts that make up my actual FreeBSD
Server (ie: Motherboard)? Or Parts in the GPS Device (ie: Sure Elec.
GPS)?
Or in the Satellites
Alby VA wrote:
When you say crystals used to control the timing in computers,
are you referring to the parts that make up my actual FreeBSD
Server (ie: Motherboard)? Or Parts in the GPS Device (ie: Sure Elec.
GPS)?
Motherboard.
Or in the Satellites receiving the GPS signal?
Satellites
On Feb 23, 6:12 pm, Chris Albertson albertson.ch...@gmail.com wrote:
The crystal on the computer motherboard.
At the most basic level, the purpose of NTP is to compute that offset
you see. That is the offset between the clock on the computer's
motherboard and a perfect clock. The offset
On 2/23/2012 9:20 PM, Alby VA wrote:
On Feb 23, 6:12 pm, Chris Albertsonalbertson.ch...@gmail.com wrote:
The crystal on the computer motherboard.
At the most basic level, the purpose of NTP is to compute that offset
you see. That is the offset between the clock on the computer's
motherboard
On Fri, Feb 24, 2012 at 02:20, Alby VA alb...@empire.org wrote:
Thanks. I needed that NTP 101 lesson. So is it a stretch to try and
obtain a quality motherboard to improve the frequency offset?
The gross error of 25 PPM is on the good side. It's not uncommon to
see several times that much.
On 2012-02-23, Alby VA alb...@empire.org wrote:
On Feb 23, 4:29?pm, unruh un...@invalid.ca wrote:
No, that is a very typical figure for the frequency offset. Remember
that the crystals used to control the timing in computers are not
supposed to be terribly accurate. (They are chosen to be
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