[time-nuts] Oscilloquartz 3210 Cesium Standard

[Javier Herrero]

Hello,

I've some manuals from an OSA-5585, one of them for the EUDICS 3120. The 
thing that Symmetricom calls EUDICS-3120 really is a FTS-5045 module 
(Symmetricom in my case), that I think that it is the same that is 
inside the FTS-4060. It seems that one common problem with these, 
discuted some times in the list, is an STEL-1173 IC that has a failure 
mode in which the outputs stop working (one after another, not all at 
same time :) ).

Regards,

Javier

On 27/08/2014 23:09, Chris wrote:
> Hi,
>
> I recently bought an Oscilloquartz 3210 cesium standard and although 
> it does
> power up, it does not lock. All the parameters on the meter look 
> sensible, other
> than the 2nd harmonic, #9 parameter, which shows zero. Quart 
> oscillator output
> looks almost spot on in comparison with the lab Z3816. I have no info 
> on this
> unit at all, so this may either be a dead tube, or other electronic 
> fault on
> one of the many pcb's in the system. Ion pump had a small reading on 
> power up,
> but now dropped back to zero.
>
> I am looking for a user guide for this unit, or even better, a manual 
> with theory
> of operation and setup info. Can anyone help with this, or perhaps 
> suggest a
> source ?. Year of manufacture estimated 1984/85, from date code on ic's.
>
> I notice that the tube is from FTS, the same construction as in the 
> FTS 4060, but
> different part number and wonder if this was original fitment, or has 
> been
> replaced at some stage...
>
> Regards & Thanks
>
> Chris Quayle
>
> Oxford, England
> .
>
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