"toia" wrote in message
ups.com...
Hi
I'm having a problem conecting a new navman 3100 multi (ver.1.4) to a
furuno 1650 f ,I'm trying to get the navman to tell me the speed and
the depth via the furuno ,I've conected it to 12v and the NMEA cable
and the common but it does not show any of the two. I have also check
the volt's out going the NMEA cable that reads 2,3 volts.I also tryed
reverse the NMEA cables and nothing.On the furuno end I turn on all
the sentences on and also the port 1 to NMEA 2.0.
Any help would be very appreciated .

The Navman NMEA output is single-ended (one wire) and referenced to ground.
The NMEA input on the Furuno most likely is properly designed and thus
differential and balanced. Connect the RD-H of the Furuno to the NMEA out of
the Navman and the RD-C of the Furuno to the ground of the Navman.

Meindert