[time-nuts] Samsung-Symmetricom GPSDO Rollover Problem

[bryon]

I have a Samsung GPSR, which is a Symmetricom Z3805A.  It looks like a 
Z3801A, except it has a front panel power switch.  On the rear panel it 
shows its made by Symmetricom and it has stickers inside on the PCB 
showing Symmetricom Z3805A, etc.  Runs off of 28 volts DC.  It also uses 
the MTI-260 5 Mhz oscillator on a 5 Mhz doubler board to get back to 10 Mhz.

The unit runs, but it has the March 2004 rollover date problem.

The unit uses a Furuno GT-8031B GPS receiver.  The GPS receiver has the 
form factor of a Motorola M12+ receiver and then the Furuno receiver is 
mounted on an adapter board that has the form factor of the elder 
Motorola PVT/Oncore VP receivers.

The Furuno runs 9600 BPS and the basic data sheet states it runs NMEA 
like protocol.

I attempted to put a LEA-6T and a M12+ into NMEA mode at 9600, but they 
will not do it.  I think its because they are timing only receivers and 
only run binary.  I also tried to put a Motorola Oncore VP in the unit 
that was set to the 6 channel mode and binary and the Samsung unit gave 
a front panel fault about 30 seconds after power up.

Does anybody have any experience with a replacement GPS receiver for 
this unit ?

Thanks.