Just to add to to this, I recently had a partial power outage and one of my
better OCXO's (a Datum 1000) lost power for a day or so. After being powered
back up for approx 24 hours the frequency error was well under one part per
billion. This is more than accurate enough for any of my amateur
On Tue, Mar 26, 2013 at 07:39:51PM +0100, Alberto di Bene wrote:
> On 3/26/2013 7:21 PM, Dan Kemppainen wrote:
>
> >Keep in mind, we are after all, taking about windows. An operating
> >system that IS NOT real time operating system. (You think it is, try
> >move a continuous stream of a few 6+ MBy
Hi
The worst case (this time) are errors in the bottom 5 bits. The software will
treat them as valid data. That assumes things stay simple. You are looking a
counter that wraps around a lot of times….
Bob
On Mar 26, 2013, at 7:33 AM, Javier Serrano
wrote:
> On Mon, Mar 25, 2013 at 11:16 PM,
Hi
All the stability and likely 20 to 30 db better phase noise. Probably 40 to 60
db better spurs / crud.
Bob
On Mar 26, 2013, at 12:31 PM, "Stan, W1LE" wrote:
> I should of been clearer, Thanks for your comments.
>
> final configuration is:
>
> OCXO as a 10 MHz reference to the 106.5 MHz
> within network latency of around a second or so
A second is a long time/distance for a packet.
The measured round trip time from California to Maine is under 100 ms.
Sanity check: The US is 3000 miles east-west. A mile is 5000 feet. The
speed of light is 1 ft/ns in vacuum. So that's ballpa
On 3/26/2013 7:21 PM, Dan Kemppainen wrote:
Keep in mind, we are after all, taking about windows. An operating
system that IS NOT real time operating system. (You think it is, try
move a continuous stream of a few 6+ MBytes/Sec data to it!)
Well, the Perseus SDR, when set to its maximum sampli
On 3/26/2013 2:43 AM, time-nuts-requ...@febo.com wrote:
>albertson.ch...@gmail.com said:
>>I think you can get Windows to run at the "few milliseconds" of error range
>>with the standard NTP distribution.
>I don't think I've seen anything that bad, but it's easy to be off by 100s of
>ms if I
I should of been clearer, Thanks for your comments.
final configuration is:
OCXO as a 10 MHz reference to the 106.5 MHz PLL then the DB6NT
multiplier chain for the LO.
All of the stability I need for a contest weekend.
Stan, W1LE
On 3/26/2013 1:21 AM, Rex wrote:
Please tell us if I am pars
I think using satellite Dave's plot routines is the way to tweak NTP. If you
update too often, you can see the disturbance. This isn't a scientific
solution, but a practical one.
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On Tue, Mar 26, 2013 at 12:41 AM, Hal Murray wrote:
>
> davidwh...@gmail.com said:
>> I have had trouble with the built in XP NTP client where it fails silently
>> so I usually install Tardis which keeps an easy to read log which includes
>> performance data.
>
> One of the problems with timekeepi
On Mon, Mar 25, 2013 at 11:16 PM, Tom Van Baak wrote:
>> Both edges of the 24MHz clock gating pulse are asynchronous with respect
>> to the signal being gated.
>> Metastability can result with clock pulse widths that lie within a
>> critical range.
>>
>> Bruce
>
> I don't disagree with your statem
Hi
One very important thing to consider when looking at this design - it was done
in the era of selective availability. That provided a lot dither all by it's
self.
Bob
On Mar 25, 2013, at 10:05 PM, "Richard H McCorkle"
wrote:
> Bob,
> You are preaching to the choir and although Brooks fel
davidwh...@gmail.com said:
> I have had trouble with the built in XP NTP client where it fails silently
> so I usually install Tardis which keeps an easy to read log which includes
> performance data.
One of the problems with timekeeping is the load on the servers.
The standard ntpd package tri
On Tue, 26 Mar 2013 05:05:26 +0100, "Anthony G. Atkielski"
wrote:
>Dan (I think) writes:
>
>> Because, up until today, windows time did what I needed it to do. It may
>> still, if the fault turns out to be network related.
>>
>> In reality, it's more software to learn to administer, and setup and
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