[time-nuts] DATUM 9390 Info wanted

[Rob Kimberley]

Björn

You are correct. I was working for Datum's UK rep at the time of the
rollover problem. Most older units were fixed by a firmware upgrade, but
some of the very old units needed a full GPS engine upgrade. I don't have
any specific details available.

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Björn Gabrielsson
Sent: 12 September 2007 09:06
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] DATUM 9390 Info wanted

); SAEximRunCond expanded to false
Errors-To: time-nuts-bounces+rk=ming-consultants.com at febo.com RETRY

Don & Rob,

>From back in my memory - I have a feeling I have read - that some 9390s GPS
receivers had trouble with GPS week rollover bugs. Not the orginal
1024 weeks but they were programmed to work "within" a 1024 week window.

I am sure there are time-nuts with more accurate information.

--

   Björn


On Wed, September 12, 2007 9:48, Rob Kimberley said:

> Hi Don,
>
> Which 9390 do you have? i.e. 9390-xxxx. Have one or two manuals here.
> There
> are many variants, so a model number would be a good start.
>
> Datum's 9390 products were GPS using Trimble receivers and antennae.
>
> Rob Kimberley
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 
> On Behalf Of Don Wisdom
> Sent: 12 September 2007 04:21
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] DATUM 9390 Info wanted
>
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+rk=timing-consultants.com at febo.com RETRY
>
> Hi,
> I was curious if anyone could tell me a little bit more about the 
> DATUM 9390 clocks.  Primarly  whether it uses a propatary antenna & 
> whether it is indeed gps based or loran or ??  Also if anyone has a 
> manual available that'd be cool.
> Thanks
> --Don
>
>
>
>
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