PPS will be marked as falseticker when no prefer peer available. Do you
set prefer for your GPS ?
2011/5/14 David Lord sn...@lordynet.org
xPPS(2) .PPSb. 0 l3 16 3770.000 -0.003 0.004
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Mischanko, Edward T wrote:
Can anyone tell me, does the sensitivity for frequency adjustment lessen
as the polling interval increases? I ask because I'm observing that my
They are linked, but I have a feeling that the loop time constant is not
clamped, even though the poll interval is. The
David Woolley wrote:
ecause I'm observing that my
They are linked, but I have a feeling that the loop time constant is not
For clarity, it is the frequency response that varies, but that does
mean that the gain for fast variations reduces. Note that, because of
the oversampling, the cut
Dave,
How do I adjust the loop time constant so that it is shorter??
The integral component should be retained. The effect of having too
long a loop time constant should be that the system fails to track
clock
wander, so would be more vulnerable to temperature changes or
forgetting
to
Edward wrote:
How do I adjust the loop time constant so that it is shorter??
First, I will offer my favorite between the lines Bible quote:
Blessed are those who get what they deserve
which is similar to Be careful what you wish for.
You should be able to ... make whatever adjustments you
Nickolay Orekhov wrote:
PPS will be marked as falseticker when no prefer peer available. Do you
set prefer for your GPS ?
2011/5/14 David Lord sn...@lordynet.org
xPPS(2) .PPSb. 0 l3 16 3770.000 -0.003 0.004
I had noselect so that my network time was safe in case
Mischanko, Edward T wrote:
How do I adjust the loop time constant so that it is shorter??
Looking at some recentish code, it looks like the time constant and poll
interval are in a constant relation and the oversampling rate can't
change. This for PLL mode.
However, I think you should
Chris Albertson wrote:
You don't need an expensive computer.
An older computer works fine ...
Just make sure it has a real RS232 serial port
and not a USB/Serial converter.
Many pieces of existing network equipment can also double task
as a LAN NTP Server, enterprise routers, web servers,
On 5/12/2011 3:14 AM, Alan Decelis wrote:
In the context of a requirement to set up a redundant configuration of
internal (peered) GPS Network Time Servers that operate at Stratum 1, is
there a best practice of the number of GPS Network Time Servers to set?
Would it be risky to rely on two
On 5/14/2011 1:23 PM, Mischanko, Edward T wrote:
Can anyone tell me, does the sensitivity for frequency adjustment lessen
as the polling interval increases? I ask because I'm observing that my
offset increases and the frequency adjustment decreases to the point I
fall out of sync at polling
Edward,
The loop time constant varies directly with the poll interval. See How
NTP Works in the current documentation. Note that the default value and
range are purposely optimized for public time servers in order to manage
network overhead and are not appropriate for the most accurate LAN
Oh, you may also discover that 'burst' is *not* your friend.
H
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