[time-nuts] Datum TS-2100 Rubidium

Rob Kimberley rk at timing-consultants.com
Thu Jul 22 16:37:55 EDT 2010


Thanks. Hope the Sym are treating you well! Give my regards to Ron.

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Greg Dowd
Sent: 22 July 2010 8:10 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Datum TS-2100 Rubidium

I'm sure you're right.  The Rb was a hardware option that was added after
the original design so I wasn't paying much attention.  I thought the
chassis was different but may have just been longer than the stock
10.5 version?  That chassis design was an experiment where we had an
industrial design house create the basic shape and characteristics (extruded
aluminum front, beveled key cutouts, etc) and then adapted it to a bunch of
designs so it is hard to remember which was which.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob Kimberley
Sent: Wednesday, July 21, 2010 10:59 AM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Datum TS-2100 Rubidium

Are you sure? I honestly thought we just bolted it in the 1U chassis. I know
earlier Datum units with the larger FRS Rbs went into 2U chassis.

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Greg Dowd
Sent: 20 July 2010 6:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Datum TS-2100 Rubidium

I think the Rb version went in a taller case?  As for the reboot, probably
depends on where you are probing :-) My proto unit from 1996 is still
happily ticking along on my bench in the lab with an MTI oven that still has
tuning range.  

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Julien Goodwin
Sent: Tuesday, June 29, 2010 4:27 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Datum TS-2100 Rubidium

On 28/06/10 21:36, Julien Goodwin wrote:
> Up next is to convert the darn thing to Rubidium, like it was meant to

> be when I purchased it (insert rant here).

OK so the pinout vaguely matches, the TS-2100 is *very* twitchy on the alarm
circuits, even a 1Mohm scope (well, it's 1M in theory, cheap
Rigol[1]) tripped it to reboot a few times.

But where in the world are you supposed to *put* the darn LPRO oscillator,
it's too tall to fit above the board, and there doesn't look to be enough
room between the back of the front panel and the main board.

I'm also not sure about the power supply thing, seeing only the single post
to time-nuts about it.

I'd love photos, but I'd assume that most people that have one it sits in a
rack running.

Thanks,
Julien

1: Actually 'tis one of the 50Mhz units "hacked" to 100Mhz operation, a very
nice Tek 11k analog scope was reserved, but the seller appears to not want
my business going silent after several prods.

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