[time-nuts] Need Help - Datum 9390 GPS Time Code &FrequencyGenerator

[Mike Feher]

>From my experience, and I have about 8 9390s, some play and some do not. It
was explained to me that they have older firmware in them and will not work
unless they had the new week rollover number programmed into them. Most, as
I said, have old firmware, before the new rollover was introduced. I believe
right now only two of mine work. I used to have three working, but, one of
them quit a few years ago, for no apparent reason. With too many projects, I
have not had much time to look into it. Also, programming them from the
front panel is a real pain. Regards - Mike 

 
 
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
 
 
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of John Miles
Sent: Monday, October 06, 2008 10:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Need Help - Datum 9390 GPS Time Code
&FrequencyGenerator

Sounds like you're doing everything right.  9390s are plug-and-play by
nature, so I'd have to wonder if there's some front-end damage to the GPS
receiver.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Myers, Charlie
> Sent: Monday, October 06, 2008 6:59 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] Need Help - Datum 9390 GPS Time Code &
> FrequencyGenerator
> Importance: High
>
>
> I recently obtained a Datum model# 9390-52321 GPS Time Code & Frequency
> Generator.  This unit has a Rubidium time base.
>
>  I hooked the unit up to my Motorola GPS2000 GPS antenna (which is
> mounted on the roof of my house) and powered the unit up, but I can't
> seem to get the unit to see the satellites.  I keep getting the
> following error message on the LCD display, "Signal Level Low" followed
> by the status message, "GPS Time Not Acquired".
>
> I checked the antenna and transmission line and they seem to be okay
> because they operate my HP z3801A GPS time/frequency receiver just fine
> and I get plenty of satellite signal level on the HP receiver.  I
> checked the +5 volts on the antenna connector on the back of the Datum
> unit and that measures correctly.
>
> Does anyone have any ideas where to look or what other tests to perform
> to isolate this problem?
>
> Thanks for any assistance you can provide me.
>
> Charlie Myers
> WA3RAD
>


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