[time-nuts] Austron 2200A Manual

Thu Jan 5 05:27:49 EST 2006

Robert,

I'm 99% certain that Trimble didn't use down conversion on their GPS engines
even on this older unit. Unfortunately even if you get the manual, it will
probably only be operational as Datum were always very guarded about
providing schematics etc to customers!

Will see what I can glean from  9390-55100 and -55183 manuals I have, which
may help.

Rob 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Robert E. Martinson
Sent: 04 January 2006 21:59
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Austron 2200A Manual

My Datum 0390-5533 has a "Trimble Navigation Board, Assy 11179 Rev F", and
another Trimble board that is marked "Datum SNP board 11874 Rev A & Trimble
Navigation". This first board also contains a 16.368 MHz "frequency source"
by Greenway. I do not have the original antenna.  I bought 2 antennas from
NavSphere , they are advertised as 2.5 to 12 VDC on the NavSphere website
and clearly labeled as 2.5 - 12 VDC.  The first one failed after some hours,
thinking maybe it was a fluke I tried a second one.  Same thing it failed
after some hours.  The company refuses to answer my requests for
replacements that will work at 12 VDC as advertised.  

Option is to use a Bias-T, isolate the 12 VDC & insert 5 VDC. Or obtain a 12
VDC antenna, or even the Datum or Trimble antenna.  Looking at the board
near the TNC antenna connector I see a choke L3 and a cap C5 with a ferrite
bead on one leg.  Maybe this is the 12 VDC feed to the antenna.  Will put
back together later and measure voltages later.

If this Trimble receiver down converts in the antenna, it makes the problem
considerably more difficult to solve.  What is the IF frequency?  Any hints
appreciated.

REM

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob Kimberley
Sent: Wednesday, January 04, 2006 15:03
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Austron 2200A Manual

Robert,

My pleasure Sir!

The problem here is that the antenna may not work with +5v, and may actually
need +12V. However, I have successfully done this with an Odetics receiver
in the past, but the GPS engine was not a Trimble, and I don't actually know
who made the antennae, but I do remember that they had both 12V and 5V
versions. 

Worth a try though. 

For the record guys, I have worked directly for Systron-Donner, Austron,
Odetics/Zyfer and have represented TrueTime, Datum, Meinberg, and KSI, so
have some useful experience (plus a load of old manuals!!)

Rob 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Robert E. Martinson
Sent: 04 January 2006 18:38
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Austron 2200A Manual

Wow, thanks for the quick response!!!  Any help will be appreciated.  Maybe
I can disconnect the 12 V & put 5 V on the antenna (internally), will try
and trace the traces.

REM

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob Kimberley
Sent: Wednesday, January 04, 2006 13:20
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Austron 2200A Manual

Hi Robert,

I do have some 9390 manuals as well but doubt if I have that one (looks like
I better check out what I have and post the list). However I do know that
Datum used Trimble engines in their GPS products which did not down convert
and some of the earlier models did have +12V feeds for the LNA inside the
antenna rather than the later and more common +5V types.

Will check and let you know.

Rob Kimberley 

-----Original Message-----
From: Robert E. Martinson [mailto:REMartinson at RCN.com]
Sent: 04 January 2006 18:06
To: 'Discussion of precise time and frequency measurement'
Cc: time.bandit at btinternet.com
Subject: RE: [time-nuts] Austron 2200A Manual

Hi Bob,

While you look through your box of manuals, could you please look for a
manual for the Datum 9390-5533 which I acquired via EBay.

Any info would be helpful, I note that it has 12 VDC on the antenna
connector so I am curious if its for a preamplified antenna or an
antenna/dowmconverter.

I am more then happy to pay for it.

REM
REMartinson at RCN.com

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Rob Kimberley
Sent: Wednesday, January 04, 2006 10:39
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Austron 2200A Manual

Luciano,

I used to work for Austron before they were acquired by Datum, and have a
box of old manuals in my garage. Not sure if I have this particular one, but
will check and let you know.

Kind Regards

Rob Kimberley 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Paramithiotti, Luciano Paolo S
Sent: 04 January 2006 15:07
To: time-nuts at febo.com
Subject: [time-nuts] Austron 2200A Manual

I have bought an Austron 2200A GPS receiver with internal rubidium.
Unfortunately I haven't the antenna that really is a special converter.
I am looking for the service manual copy . Symmetricom say it haven't.
I remember my Austron is only 10 years old. 
Someone in the word can help me?

Thanks to all in advance 

Luciano P. S. Paramithiotti
Italy

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