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
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.