[time-nuts] Motorola GPS models

Randy Warner Randy at synergy-gps.com
Fri May 5 16:43:43 EDT 2006


This is an original GT with battery. It probably has v1.3 firmware. Take
a look and see if the internal ID says v1.3. It might have been
reflashed to something else because the original firmware had a VERY
SHORT lifetime.  The original GT was a "NAV" receiver without satellite
data and WITHOUT NMEA support! NMEA was not added until v2.01 which was
the first GT+ firmware.

When Motorola switched to the GT+ the P/N began with "R3" instead of R1.
The original "UT" receiver had an "A" in place of the "N" in the part
number. I have attached the GT/GT+ firmware notes.



-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Artur Dworak
Sent: Friday, May 05, 2006 1:33 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Motorola GPS models

Hello list,

This is my first post to this list.
Ok, lets go, my name is Artur Dworak, my ham call SP5QA and I'm from
Poland. I run some public ntp servers for local network community.

Some days ago i found in my drawer one motorola GPS ONCORE MN:
R1221N1112 SN: R009G6 with date: 01/29/97

This unit left after acient network project about more then 4 years ago.

I don't know it is UT or GT unit.

Randy, can You help me determine what is it ?

I'm asking about this, becouse last ( second storm for this year ) bewl
my motorola UT+.  I'm looking at this old unit as repleacement. It's
suprasing, becouse 40 cm other big black,( about 15 cm fi ) marine
motorola GPS antenna is still working ok on my roof. About 5 or 6 years
without problems. But Oncore was connected to better, new antena..
Now Garmin GPS-25HVS is still working with old antena, Oncore UT+ is
dead (with antena too)...

Best regards,

Artur Dworak SP5QA

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