[time-nuts] BC637PCI and OCXO

[GandalfG8 at aol.com]

My first card at least is a Datum card so quite old now, and that was fine  
doing what you want to do..
 
You really will need to read the manuals in some detail and I do suggest  
downloading the larger of the two files I uploaded, that will give you the  
latest versions of the Demo programs that allow adjustment of the card, as 
well  as the earlier versions of the same and all the manuals
For some things, with earlier versions anyway, it's better to use the  
BC635 version of the Demo software, as that comes with a built in help  section 
which the BC637 version lacks.
 
I'll try and get a card installed so I can run the software properly again  
and if so will come back with more information later.
 
Regards
 
Nigel
GM8PZR
 
 
In a message dated 07/02/2014 18:25:22 GMT Standard Time, time at patoka.org  
writes:


It  seems I have first generation of that card. And I was thinking to use 
that  card as a source of 1PPS and 10MHZ - not to feed it from another  
reference. I though it is possible to do some "modding" to replace VCXO  
by OCXO.

PCI Board Revision ID : 18 (0x12), Firmware Version :  DT10041V11



On 2014-02-07 03:00, mike cook wrote:
> Le 7  févr. 2014 à 00:18, d0ct0r a écrit :
> 
>> 
>>  Hello,
>> 
>> Does anybody seen any links to the information  how to implement 
>> external OCXO to Symmetricom PCI TFP BC635/BC637  ?
>> 
>> 
>    check the Symmetricom  datasheets. You don't mention the version you
> are needing info for ,  IRIG/GPS..  Anyway,  all  that I glanced at
> show an  Exr. 10MHz ref input on pin 1 of the sub-D 15 connector.
> Digital, 40%  to 60% or sine, 0.5V to 8V p-p, > 10kOhm.
> ex.
> 
>  
<http://www.symmetricom.com/resources/download-library/documents/datasheets/bc637pci-v2>
>  
>> --
>> WBW,
>> 
>> V.P.
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--  
WBW,

V.P.
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