ok here is the situation.
I Have a standard horizon GX2100 matrix
ais vhf. this does not have an internal
gps and requires
GPS info from another source.
I have a
garmin 176c gps. the
garmin is too dated to display
ais targets, however the
VHF requires the
NMEA output from the garmin for the AIS function to
work.
I had everything connected (NMEA output of GPS to
NMEA lowspeed input on ais) and working properly for about 2 months, and then all of a sudden there is no communication between the GPS and VHF, so no more AIS on the vhf...
I have redone all my connections and no change, and when I stick a light bulb tester on the nmea output wire, it does not light up. so I am thinking the problem is internal to GPS nmea output.
also, when the NMEA output on the GPS is turned on, I get a cyclically humming
interference on my
SSB (icom
m700 pro). when I turn off the nmea out put there is no
interference... note even with the output on there is no communication between the gps and Vhf.
anyone have any ideas for reestablishing the connection between the two? or assuming I am correct in that there is an internal GPS nmea problem, can anyone recommend a generic GPS
antenna with NMEA wires that I can wire straight to the VHF?? that would keep the gps and vhf independent and I like that.
Thanks,
Ben