[time-nuts] BC637PCI and OCXO
d0ct0r
time at patoka.org
Fri Feb 7 23:02:40 UTC 2014
As far as I understood, in many modes (except GPS mode), we need to set
date/time manually.
Also, I found the link for the "direct" oscillator replacement part:
http://www.mti-milliren.com/pdfs/210.pdf
I think in the documentation, Symmitricom mentioned this particular
model. Now I know how it looks like. But unfortunately its not
"straight" process just to use my Hakko to exchange the crystals. Its
required to change the microcode as well. So, that is not an option. The
only way is to use external OCXO connected to pin 1 of the 15-pin
connector. And I'll try it.
Thank you all for all the information !
Regards,
V.P.
On 2014-02-07 14:55, GandalfG8 at aol.com wrote:
> Sounds like you cracked it, and beat me to it:-)
>
> I just dug out a PCI expansion chassis, the quickest option for now,
> and
> have one card up and running but have discovered, as a left over from
> my
> playing earlier, that installing the later software, what Symmetricom
> calls
> its "BC635/637 configurator program", causes earlier versions of the
> software
> to fail at startup, even with the latest one uninstalled, so that's
> something to watch out for:-(
>
> The later stuff does seem to offer all the options of the earlier
> software
> though, and as you've no doubt discovered the oscillator parameters you
> mention are accessed through the BC635 software rather than the BC637
> version.
>
> On the version I'm running at least, verion 10 of the "configurator" at
> the
> moment, there is a menu option to switch between internal and external
> oscillators on the Hardware menu in "standard" configuration and the
> other
> options as you say are available in "advanced" with the oscillator
> switching
> no longer showing.
>
> Interesting to see the rolling time displayed down to microseconds,
> although my eyes do struggle a bit to keep up with that, but rather a
> shame that
> for now I seem to be stuck in June 1994!
>
> I am getting the impression though that this particular software is
> expecting a later version of the card, this card is showing in Device
> Manager as
> a BC635/7PCI-eV2, which it certainly isn't, and the software is
> offering to
> adjust the DDS frequency for me, which would be nice but I don't
> remember
> it having DDS either.
>
> Time to have a software clearout methinks and to start over.
>
> Have fun:-)
>
> Nigel
> GM8PZR
>
>
>
>
> In a message dated 07/02/2014 19:12:34 GMT Standard Time,
> time at patoka.org
> writes:
>
>
> Now I have the plan. Thanks !
>
> I'll try to connect external OCXO to that 15-pin connector, then using
> provided utility, I could switch to external oscillator.
>
> I think here is settings for externally connected source of 10Mhz:
>
> 12. Select Clock Source ->
> 0. Internal
> 1. External
>
> Probably I'll need to do some adjustment using so-called "Advanced
> settings":
>
> Advanced Menu:
>
> 1. Control Jam-Sync
> 2. Force Jam-Sync
> 3. Set Clock Value
> 4. Load D/A Converter
> 5. Set Disciplining Gain
> 6. Disconnect Battery to RTC Chip
> 0. Back to main menu
>
> Regards,
>
> V.P.
>
> On 2014-02-07 13:39, GandalfG8 at aol.com wrote:
>> 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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>>>> and follow the instructions there.
>>
>> --
>> WBW,
>>
>> V.P.
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>
> --
> WBW,
>
> V.P.
> _______________________________________________
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--
WBW,
V.P.
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