On 27/01/2013 22:43, unruh wrote:
[]
I agree that 1% is pretty bad-- that is 1/6 of a semitone, which is
clealy preceptible. However 1 cent, 1/100 of a semitone, is the limit of
audibility, and it is VERY hard to tune a piano string to 1 cent (pin
slippage and adjustment, frequency coupling
Jeroen Mostert jmost...@xs4all.nl wrote:
Even if you consider accurate detection of 1 cent to be good enough for
tuning
purposes, your measuring equipment still needs to be an order of magnitude
better. A 0.1 cent difference is 57.8 ppm. 12 ppm is 0.02 cent, which isn't
excessive if
hi,
Is there any configuration support in ntp by which i can drop to the local
reference clock at desired stratum value (received from server)
basically i want to drop to my local clock as my servers reach to stratum
level 10 ?
___
questions mailing
Hi,
I would like to know if NTP can be used to measure latency between
publishers and subscribers in a distributed computing environment. NTP is
configured on all the nodes. How do I use the statistics collected on both
the nodes to measure latency. Is there any tool that I can use for the same?
On 28 Jan 2013 09:57:00 GMT, Rob nom...@example.com wrote:
There will be the extra complication that a UMTS connection goes into
a sleep mode when there is little or no traffic. To wake it up
you need to send about 4 packets/second for some time. This is a
very typical pattern on a UMTS
no-...@no-place.org no-...@no-place.org wrote:
On 28 Jan 2013 09:57:00 GMT, Rob nom...@example.com wrote:
There will be the extra complication that a UMTS connection goes into
a sleep mode when there is little or no traffic. To wake it up
you need to send about 4 packets/second for some time.
On 28 Jan 2013 17:18:27 GMT, Rob nom...@example.com wrote:
WiFi has the same problem on a slightly smaller scale.
With WiFi the pingtime jitters by 50 ms or so.
OK, but if I understand this time protocol properly, the time-stamp is
adjusted by me (the client) by half the round trip time. So
no-...@no-place.org no-...@no-place.org wrote:
On 28 Jan 2013 17:18:27 GMT, Rob nom...@example.com wrote:
WiFi has the same problem on a slightly smaller scale.
With WiFi the pingtime jitters by 50 ms or so.
OK, but if I understand this time protocol properly, the time-stamp is
adjusted by
On 28 Jan 2013 17:56:10 GMT, Rob nom...@example.com wrote:
In my opinion, when you think a crystal is not accurate enough, relying
on single-shot time measurements via radio internet connection will
*certainly* not be accurate enough. The protocols used on radio
channels are not symmetric,
Maarten Wiltink wrote: Maurice Janssen wrote:
Please read http://www.pool.ntp.org/en/vendors.html .
Indeed getting and using vendor.pool.ntp.org is superior.
At that point, however, it strikes me that using
time.vendor.tld serves the vendor even better,
what with having actual control
no-...@no-place.org wrote:
It is also my experience that long term crystal stability
in these devices is way better than their absolute accuracy.
So a one-time calibration is a big improvement over assuming
the nominal sampling frequency.
As I have pointed out before, whatever the
deepak khandelwal wrote:
Is there any configuration support in ntp by which i can
drop to the local reference clock at desired stratum
value (received from server) basically i want to drop
to my local clock as my servers reach to stratum
level 10 ?
See floor and ceiling?
--
E-Mail Sent
Mischanko, Edward T wrote: NTP 4.2.7 has been in development for over 6 months
and
is very stable, yet, yes, it's still in development.
IIRC over 3 years.
--
E-Mail Sent to this address blackl...@anitech-systems.com
will be added to the BlackLists.
On 2013-01-28, jack flora flora...@gmail.com wrote:
Hi,
I would like to know if NTP can be used to measure latency between
publishers and subscribers in a distributed computing environment. NTP is
configured on all the nodes. How do I use the statistics collected on both
the nodes to measure
On 2013-01-26, deepak khandelwal dazz...@gmail.com wrote:
hi,
Is there any configuration support in ntp by which i can drop to the local
reference clock at desired stratum value (received from server)
basically i want to drop to my local clock as my servers reach to stratum
level 10 ?
There
On 2013-01-28, Jeroen Mostert jmost...@xs4all.nl wrote:
On 2013-01-27 23:43, unruh wrote:
On 2013-01-27, David Taylordavid-tay...@blueyonder.co.uk.invalid wrote:
On 27/01/2013 19:33, unruh wrote:
On 2013-01-27, no-...@no-place.orgno-...@no-place.org wrote:
[]
In case you are wondering, my
On 2013-01-28, Rob nom...@example.com wrote:
no-...@no-place.org no-...@no-place.org wrote:
On 28 Jan 2013 09:57:00 GMT, Rob nom...@example.com wrote:
There will be the extra complication that a UMTS connection goes into
a sleep mode when there is little or no traffic. To wake it up
you need
On 2013-01-28 23:04, unruh wrote:
On 2013-01-28, Jeroen Mostertjmost...@xs4all.nl wrote:
On 2013-01-27 23:43, unruh wrote:
On 2013-01-27, David Taylordavid-tay...@blueyonder.co.uk.invalid wrote:
On 27/01/2013 19:33, unruh wrote:
On 2013-01-27, no-...@no-place.orgno-...@no-place.org
unruh wrote: Jeroen Mostert wrote:
Even if you consider accurate detection of 1 cent to be
good enough for tuning purposes, your measuring equipment
still needs to be an order of magnitude better.
A 0.1 cent difference is 57.8 ppm. 12 ppm is 0.02 cent,
which isn't excessive if you're
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