[time-nuts] is there a cheap and simple way to measure OCXOs?

Azelio Boriani azelio.boriani at screen.it
Tue Jun 5 12:25:42 UTC 2012


Agreed, the first is the current then the frequency at 2.5V (mine are 0-5V
EFC range). Usually the oven is defective (no heat) and I learned myself
how to fix them (they are the MV201).

On Tue, Jun 5, 2012 at 1:25 PM, Magnus Danielson <magnus at rubidium.dyndns.org
> wrote:

> On 05/06/12 12:18, Attila Kinali wrote:
>
>> On Wed, 30 May 2012 15:11:03 +0200
>> Attila Kinali<attila at kinali.ch>  wrote:
>>
>>
>>  I recently bought some Oscilloquartz 8663 from ebay and am now wondering
>>> how to check whether they are working correctly or whether they are
>>> out of specs.
>>>
>>> Unfortunately, although i have a reasonable park of measurement
>>> instruments,
>>> none of them are in the precision range that i'd need to characterize
>>> the 8663's.
>>>
>>
>>
>> thanks everyone for the answers! I did dig a little bit trough the
>> avilable
>> devices (ie those that do not cost me an arm and a leg to buy) and came
>> to the conclusion that i have to reformulate my requirements.
>>
>> I think, the most important thing for me at the moment is to verify that
>> i do not have any defect devices. Defect in the sense of something other
>> than "does not output any signal" (these are trivial to detect).
>>
>> And here i'm stuck again. What are likely defects of an OCXO? And how
>> would
>> i detect them?
>>
>
> Oven failure. The most common failures in my experience is that they
> either do not heat up or they are stuck at full heating. Sensing the OCXO
> should work most of the times. Monitoring the current is another cheap hint
> and measuring frequency is another. At work we measure the frequency first,
> and as they open the box up they usually note if it is hot or cold.
>
> Cheers,
> Magnus
>
>
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