Unruh wrote:
[]
> OK, I keep forgetting. What accuracy can the clock be read on windows?
> is there an interpolation routine in the kernel so the clock can be
> read
> to usec accuracy?
> I would thin k you could set up and interrupt routine to read and
> record
> the clock time when the interrupt
On May 12, 8:41 pm, "Towli" wrote:
> I think i may have the answer to my own question above...
> I read somewhere that a man with 2 watches never know what time it is...
>
> My switches sees the 2 external NTP-stratum1-servers as being closer to each
> other in time (due to their physical placemen
On May 9, 3:24 pm, "David J Taylor" wrote:
> Folks, I made some tests with various settings for the NMEA driver and the
> results are here:
>
> http://www.satsignal.eu/ntp/NTP-on-Windows-serial-port.html#usb
Congratulations on showing serial PPS refclock connected via a USB
RS-232 adapter can do
>
> Precision is normally expressed as a *negative* power of two! Assuming
> that somebody dropped the minus signs somewhere, 2**-18 is better than
> 2**-8. Precision is the smallest possible difference between two
> successive readings of the clock.
Thanks Richard!
/T
___
I think i may have the answer to my own question above...
I read somewhere that a man with 2 watches never know what time it is...
My switches sees the 2 external NTP-stratum1-servers as being closer to each
other in time (due to their physical placement close to each other and
relative to my co
"David J Taylor"
writes:
>Unruh wrote:
>> "David J Taylor"
>[]
>>> On my system, I can detect no difference between the GPS 18 and the
>>> GSP 18x. I am looking at jitters in the order of 2.2 microseconds,
>>> and offsets in the range +170/-100 microseconds.
>>
>> How are you reading the PPS in
Towli wrote:
> Hi all
>
> I found out that our Inet-Provider has stratum 1 servers available, and
> i intended to use these together with our newly acquired DCF77 machinery.
> I configured our DFC77 and the 2 external stratum 1 servers on our 2
> core switches to deliver Ntp to the rest of the n
Hi all
I found out that our Inet-Provider has stratum 1 servers available, and i
intended to use these together with our newly acquired DCF77 machinery.
I configured our DFC77 and the 2 external stratum 1 servers on our 2 core
switches to deliver Ntp to the rest of the network...
Unfortunately (
Unruh wrote:
> "David J Taylor"
[]
>> On my system, I can detect no difference between the GPS 18 and the
>> GSP 18x. I am looking at jitters in the order of 2.2 microseconds,
>> and offsets in the range +170/-100 microseconds.
>
> How are you reading the PPS interrupts>. That offset is terrible.
"David J Taylor"
writes:
>Hal Murray wrote:
>[]
>> If anybody has figured out how to get good timing out of the
>> SiRF units, please clue me in.
>On my system, I can detect no difference between the GPS 18 and the GSP
>18x. I am looking at jitters in the order of 2.2 microseconds, and
>offs
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