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, [email protected] 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,
[email protected]
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, [email protected] 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,
[email protected]
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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WBW,
V.P.
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