[time-nuts] HP E1938A Oscillator

Azelio Boriani azelio.boriani at screen.it
Fri Jul 5 13:55:00 UTC 2013


There is a control program:
http://www.prc68.com/I/pdf/NGOcomm.zip

on the E1938A page at:
http://www.prc68.com/I/HPE1938.shtml

On Fri, Jul 5, 2013 at 3:05 PM, Graham / KE9H <timenut at austin.rr.com> wrote:
> 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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