Hi all, The Z3815A is working perfectly with the new receiver except for a persistent antenna alarm. The new receiver is reporting the antenna is OK but it must have a different self-test answer sentence to the old one. The self-test is a PFEC sentence, which is proprietary to the manufacturer and not part of the standard NMEA protocol. It's responding appropriately to self-test requests from the motherboard but obviously there's a difference in the answer sentence which reports antenna integrity. I've tested it with two different antennas and they both see lots of sats properly but still produce that alarm.
If anyone here has any documentation or manuals for the Furuno GT-74 I would be very grateful for copies. If I can find the reason for the persistent alarm and it's a difference in the self-test answer, I'll make up a new interface with a microcontroller to emulate the old receiver and then it will be indistinguishable! Morris VK3DOC in Melbourne, Australia _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.