HI
Some simple empirical data:
1) Jumps tend to get further apart as the oscillator ages.
2) AT's have larger jumps than SC's.
3) A typical SC jump is below 1x10^-9
4) It's not a lot of things (spurs, drive, temperature, load,stress,
micro-fractures, plating defects) if you need to explain all
...and I should see the loop time constant in the ADEV, too - if that is
the case, the time constant should be about 2000 s, shouldn't it? (see
picture)
Volker
Am 29.11.2012 05:35, schrieb Said Jackson:
Volker,
This is a classic crystal jump. The crystal changed its frequency magically
fro
On 29 Nov, 2012, at 02:32 , Charles P. Steinmetz
wrote:
>> This is a classic crystal jump. The crystal changed its frequency magically
>> from one second to the next and the software compensated for it
>
> Here is another example of a 3805 having a bad moment. For just about two
> minutes,
von Volker Esper
Gesendet: Mittwoch, 28. November 2012 22:24
An: Discussion of precise time and frequency measurement
Betreff: [time-nuts] Z3805 incident
When looking at the PPS TI vs. time curve today I felt kind
of appalled
- a big incident peak (not an outlier) on the curve! See picture.
What happ
n of precise time and frequency measurement
> Betreff: [time-nuts] Z3805 incident
>
>
> When looking at the PPS TI vs. time curve today I felt kind
> of appalled
> - a big incident peak (not an outlier) on the curve! See picture.
>
> What happened to my Z3805? Any idea?
>
Volker,
This is a classic crystal jump. The crystal changed its frequency magically
from one second to the next and the software compensated for it
You can nicely see the time constant of the loop..
Bye
Said
Sent From iPhone
On Nov 28, 2012, at 13:24, Volker Esper wrote:
> When looking at t
Not Rb but OCXO vs GPS...
Am 28.11.2012 22:47, schrieb Azelio Boriani:
Ops, I missed the EFC value...
On Wed, Nov 28, 2012 at 10:43 PM, Azelio Boriani
wrote:
The reference is still the Rb? Then how you can tell which of the two is
doing that...
On Wed, Nov 28, 2012 at 10:24 PM, Volker Esper
Ops, I missed the EFC value...
On Wed, Nov 28, 2012 at 10:43 PM, Azelio Boriani
wrote:
> The reference is still the Rb? Then how you can tell which of the two is
> doing that...
>
> On Wed, Nov 28, 2012 at 10:24 PM, Volker Esper wrote:
>
>> When looking at the PPS TI vs. time curve today I felt
The reference is still the Rb? Then how you can tell which of the two is
doing that...
On Wed, Nov 28, 2012 at 10:24 PM, Volker Esper wrote:
> When looking at the PPS TI vs. time curve today I felt kind of appalled -
> a big incident peak (not an outlier) on the curve! See picture.
>
> What happ
When looking at the PPS TI vs. time curve today I felt kind of appalled
- a big incident peak (not an outlier) on the curve! See picture.
What happened to my Z3805? Any idea?
No entry in the error log, the staus log says
2012-11-28 10:01:30: The Smartclock Status has changed to LOC
2012-11-28
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