Icom M302 Instruction manual
©2011 Icom America Inc. Page 1
Icom America, Inc.
2380 116th Ave NE
Bellevue, WA 98004
425.454.7619
Connecting a GPS to Your Icom M302 radio
On the back panel of your radio, there are two blank wires (yellow and green) that
will connect to your GPS.
M302 Connections
Radio GPS
NMEA in + (yellow) →NMEA / Data out
NMEA in – (green) →NMEA / Data ground
GPS Example Connections
You will need to solder the 2 wires to the NMEA wires from your GPS. For more
specific information, consult the individual instruction manual from the GPS
manufacturer.
Garmin GPS
©2011 Icom America Inc. Page 2
Icom America, Inc.
2380 116th Ave NE
Bellevue, WA 98004
425.454.7619
Raymarine GPS
Note: When using some Raymarine equipment you may need to connect your Icom
radio directly to the Raymarine GPS itself, not through a repeated port from other
equipment, such as a plotter. This ensures that the proper NMEA sentence passes to
the radio.
Standard Horizon GPS
©2011 Icom America Inc. Page 3
Icom America, Inc.
2380 116th Ave NE
Bellevue, WA 98004
425.454.7619
Troubleshooting Your GPS Connection
Your Plotter/GPS receiver must be capable of sending the proper sentences
(listed below) set for NMEA 0183 (Check your Plotter/GPS instructions for
information.)
Verify that the plotter/GPS device is sending GPRMC, GPGGA, GPVTG, GPGLL, or
GPGNS sentences. (Check Plotter/GPS Instructions.)
If you are still not receiving latitude and longitude, you can try setting the plotter
to send one sentence at a time (if possible). This can help it find the most
compatible sentence.
Have a technician check the plotter/GPS using test equipment to verify it is
sending the GPS sentence.
Check the solder points on the radio and plotter connectors. Some connectors are
very small, increasing the likelihood of solder bridging.
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