[time-nuts] HP E1938A Oscillator

[Adrian]

Graham,

the answer is here:
http://www.prc68.com/I/HPE1938.shtml

I strongly recommend to read Rick's publications.
And, there is a control software for changing control parameters etc.

The other link which has been posted before:
http://www.leapsecond.com/museum/e1938a/
It includes a connector diagram.

Regards,
Adrian



Graham / KE9H schrieb:
> On 7/5/2013 12:23 AM, Perry Sandeen wrote:
>>
>> List,
>>   I was looking on Ebay for some HP E1938A
>> oscillators
>>   What I found listed were:
>>   HP E1938A 10 MHz Quartz Oscillator with EFC on PC
>> board. $100 Fluke.l
>>   HP E1938-60201 Ovenized Crystal Oscillator  (on a PC board) $100 
>> Tomy Chou
>>   HP E1938A Ovenized Crystal Oscillator  W/O a PC board for $50 and 
>> free shipping from  2010bluebook.
>> My question is thus:  What does the PC board do?  All I need is a HP 
>> EFC oscillator that would
>> be better that my HP 10811-60111’s.
>>   Do I need to worry that the E1938A’s without the
>> board maybe of lessor quality than the others?
>>   Fluke.l says his units are good but not stellar.  The other venders 
>> say they have tested the
>> units and guarantee them to be good.  If
>> so, would it get better with aging?
>>   So what does the collective wisdom/experience of
>> the group think?  TIA
>>   Regards,
>>   Perrier
>>
>>
>
> The E1938A is a microprocessor controlled and managed oscillator. 
> Probably with a lot
> of control/correction/compensation data stored on the processor board.
>
> Does anyone have any interface (I/O) definitions for the stainless 
> steel oscillator module?
>
> For the processor control board?
>
> Instructions on how to calibrate  and compensate it?
>
> My impression is that it is a lot easier for an experimenter to manage 
> an HP10811 oscillator
> where you just put power on it and a signal comes out.
>
> Thanks,
> --- Graham / KE9H
>
> ==
>
>
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