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

John Miles jmiles at pop.net
Tue Oct 7 02:19:41 UTC 2008

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

-- 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

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