Miroslav Lichvar wrote:
In a simulation with 500us exponentionally distributed jitter and
clock wander insignificant to the PLL time constant, the RMS time
error is about 40 us for the standard PLL and 80 us for the Linux PLL.
The 99th percentiles are about 100 us and 200 us respectively.
On Sun, Jun 26, 2011 at 09:05:59PM +0100, David Woolley wrote:
If the jitter is of the order of 500 microseconds, and your
delays are perfectly symmetric, and there is no clock wander (in
particular, the temperature is tightly controlled), the error will
exceed 500 microseconds, a small but
How doe Jitter and round trip time affect local time clock time acccuracy?
When looking at the jitter, what values would tell me that the phase noise
would make the local clock in accurate?
Are there any Rules of thumb to go by when looking at jitter and delay to
determine local clock
On 6/26/2011 11:36 AM, chipper wrote:
How doe Jitter and round trip time affect local time clock time acccuracy?
They don't *affect* the accuracy, they measure it!
When looking at the jitter, what values would tell me that the phase
noise would make the local clock in accurate?
Are there
chipper wrote:
If the ntp client needed to be withing .5 milliseconds of the server,how
Is the server keeping perfect time?
could I tell if the jitter and delay were to
much to support this kind of accuracy?
What percentage of the time can you tolerate the time being out by more
than 500
Richard B. Gilbert wrote:
very high quality. In particular, GPS sends a pulse per second and one
edge of that pulse is accurate to about +/- 50ns. The rest of the GPS
signal tells you which second is being marked by the specified edge,
leading or trailing (I've forgotten which).
GPS
On 6/26/2011 3:52 PM, chipper wrote:
If the ntp client needed to be withing .5 milliseconds of the server,how
could I tell if the jitter and delay were to
much to support this kind of accuracy?
Thanks
Chip
snip
Try it! If you are using an NTP server on the internet, it's going to
be
If the ntp client needed to be withing .5 milliseconds of the server,how could
I tell if the jitter and delay were to
much to support this kind of accuracy?
Thanks
Chip
Richard B. Gilbert wrote:
On 6/26/2011 11:36 AM, chipper wrote:
How doe Jitter and round trip time affect local time
