[time-nuts] Z3801A Frequency Jump

[Brian Kirby]

Good, I thought it may be failure time for the regulator or power supply. 
I had heard folks talked about this(freq jump), but I never seen it. 
I have another unit on line, so its no problem.  And its the first time 
I think I have seen it on that unit.

Brian - KD4FM

SAIDJACK at aol.com wrote:
> Hi Brian,
>  
> This is a classical crystal jump.
>  
> Nothing one can do about it.
>  
> Could have been internal to the crystal (stress-relief) or external (gamma  
> particle hitting the crystal lattice etc).
>  
> My 58503A does it every couple of days or so. Really messes with your ADEV  
> performance...
>  
> bye,
> Said
>  
>  
> In a message dated 1/26/2010 17:27:57 Pacific Standard Time,  
> kilodelta4foxmike at gmail.com writes:
>
> The  second drawing is a chart from Excel.  The Z3801A 1 PPS was being  
> compared against a HP5065A rubidium and this data is the 100 second  
> averages record by TAC32.  Note is shows a 200 nS jump too.  The  scale 
> of the plot is in microseconds (I run a 10 uS offset for some long  term 
> drift experiments).
>
> I cannot remember what causes this from  past discussions - it may be an 
> oven regulator....
>
> Brian -  KD4FM
>
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