Message: 1
Date: Fri, 29 Aug 2014 01:23:35 +0200
From: Magnus Danielson <[email protected]>
To: [email protected]
Subject: Re: [time-nuts] Oscilloquartz 3210 Cesium Standard
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8; format=flowed
FTS had a patent on microcontroller steered cesium, which could
naturally have limited the spreading time of that technology.
Oscilloquartz at the time where more focused on the telecommunication
market and meeting the ITU-T G.811 PRC quality requirement, keeping
within +/. 1E-11 in frequency, and that is achievable with the analog
design, so no rush changing it.
FTS and HP where more into time-keeping, so therefore improving the
design made more market sense for them.
Anyway, that's about how I have perceived the market at the time.
Cheers,
Magnus
Hi Magnus,
Thanks for that and also the notes about initial startup. I guess there
may have been other reasons, such as contractual requirements to buy
product built in the eu, say for military or the ESA.
With regard to startup, more or less followed your route. In pump / osc
mode until the meter indicated zero, then into open loop mode and
calibrate oscillator against the lab Z3816. Leave for a couple more
days, recheck oscillator and switch into closed loop mode. Yet another
couple of days and still no 2nd harmonic on the meter and no lock :-).
Meter indications are currently:
1-4 Psu voltages, All ok
5 Cs Oven +4 divs of 10 = 8v
6 Osc Ctrl +5 divs of 10 = 10v
7 Integrator Initially +offscale, loop open, then falls back
to zero, loop closed
8 Preamp -6.5 divs of 10 = 0.325v
9 2nd Harmonic 0, loop open or closed
Modulation on, autolock on.
Put up some pics on Photobucket earlier today:
http://s775.photobucket.com/user/NikonFtn/library/?sort=6&page=1#/user/NikonFtn/library/?sort=6&page=1&_suid=140932843589702368659727058955
So what am I missing ?. Did fill in the enquiry form at the
Oscilloquartz web site a few days ago, but no reply. Should I try again,
or are are there some special runes you need to recite before they will
talk to you ? :-). Would be quite happy to pay a reasonable fee for a
copy of the manual, paper or pdf...
Regards,
Chris
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