[time-nuts] Autek Model 620 GPS Workstation

[Rob Kimberley]

Don

Do you have any way of monitoring the output against some other standard, to 
see how the Rb is actually performing? I don't know the unit, but logically, 
I would expect a light to be on and not off when being disciplined.

Manual anyone?

Rob K

----- Original Message ----- 
From: "Don Mimlitch" <donmeis at yahoo.com>
To: <time-nuts at febo.com>
Sent: Thursday, July 06, 2006 7:15 PM
Subject: Re: [time-nuts] Autek Model 620 GPS Workstation


>
> I also have an Autek Model 620 with the same problem.
> It tracks satellites fine, but the disciplined light
> never goes out.
>
> If you press the DD key and the the W (West) button the display shows 
> numbers which seem to
> measure it's attempt to discipline the oscillator.
> The numbers are in hex but it cycles every 1000 seconds collecting an 
> average and then adjusts a few parameters
> for the next cycle. but the difference never settles.
>
> I suspect that either the Rubidium Oscillator has
> deteriorated so much that changing its field does not affect the 
> frequency.
> Or the Comparator circuit is faulty.
>
> I am also interested in any ones suggestions.
> This would be a great Measurement unit if I could get it working.
>
> If any one had any circuit diagram I might try to
> replace the Rubidium Oscillator.
>
>
>
> ------------------------------
>
> Message: 5
> Date: Thu, 6 Jul 2006 06:32:05 +0900 (JST)
> From: komine shigeharu <komnet2k at yahoo.co.jp>
> Subject: [time-nuts] Autek Model 620 GPS Workstation
> To: time-nuts at febo.com
> Message-ID: <20060705213205.77018.qmail at web10502.mail.bbt.yahoo.co.jp>
> Content-Type: text/plain; charset=iso-2022-jp
>
> Subject:Autek Model 620 GPS Workstation
>
> Anyone can help me that I have a trouble on the above
> unit.
> The trouble is:
> The GPS disciplined light does not go out. I assume this
> means the Rubidium Oscillator has not been synchronized to
> the GPS.
> (The Rubidium Oscillator works. The GPS unit works.)
>
>
>
>
>
> ---------------------------------
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