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Hi Don,
Which 9390 do you have? i.e. 9390-. 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
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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
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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
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I have several (I think 8 or 10) of the 9390 series receivers. They all work
off of 5 volt antennas, and I use an HP antenna with mine through a
splitter. Some use a Rubidium, some an OCXO and some a TCXO. Most of mine
have
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Hi Mike,
If the units are showing the wrong date, then I'm sure this due to the GPS
week rollover bug. The frequency and 1PPS will be fine, but they cannot
compute the right date as the 1024 bits have rolled over and either
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Rob -
I agree. However, usually we all know the correct date, so, that is not an
issue with me. In fact, showing the date as a total number of days in a year
is confusing to me anyway. So, as long as they lock, show hours and
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Mike,
The 3 digit days shown are because the 9390 units evolved from their IRIG
time code units. IRIG time code use the format SS:MM:HH:DDD (or more
usually displayed DDD:HH:MM:SS) They kept the same format for the GPS units
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From: Rob Kimberley [EMAIL PROTECTED]
Subject: Re: [time-nuts] DATUM 9390 Info wanted
Date: Wed, 12 Sep 2007 15:10:28 +0100
Message-ID: ![EMAIL PROTECTED]
Rob,
The 3 digit days shown are because the 9390 units evolved from
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Hi:
Thanks to John Miles and his HP 7470 plotter program I have .gif versions of
the five E1938 drawings that were in .hpg vector format that can be viewed.
These are packed into a single file E1938gifs.zip downloadable
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On Tue, Sep 11, 2007 at 09:20:43PM -0600, Don Wisdom wrote:
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
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I have a Trimble ACE-III GPS Receiver with Antenna and ant. Cable. I will
part with it including the antenna and cable and shipping to anywhere in the
continatal USA for $50.00
For further information check:
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