[time-nuts] Re: HP Z3801A - Dead GPS Receiver - Oncore VP

[Bob kb8tq]

Hi

I’m not suggesting that there is no issue. If this had been 
known to the original designers or users, routine shutdowns
and restarts would have been a show stopper. 

I’ve run 3801’s for years and years without ever power cycling
them. Other than power supply failure, they never had a 
problem. They did get detailed monitoring pretty much all 
the time. 

Bob

> On Oct 12, 2021, at 10:26 AM, CFO <tnut1 at sv16.org> wrote:
> 
> On 12/10/2021 14.53, Bob kb8tq wrote:
>> Hi
>> 
>> You can be pretty sure that in their original installations
>> as a reference for a cell tower, shutting the whole thing
>> down every couple months was not part of the spec.
>> 
>> Bob
> I read over on the Z3801A site (forum) , that it seems like that GPS receiver oscillator would drift , wo. these shutdown/calibrate steps.
> That would make the receiver drift and be more and more insensitive over time , and eventually loose sync.
> 
> This oscillator is not to be confused with the HP DOCXO.
> 
> CFO
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