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5. The Matrix Control Head outputs NMEA signals thru the "pigtail" cable attached to the end
of the GR4 GPS Receiver Cable for connection to devices such as autopilots. Connect the
NMEA Out (White Wire) of the cable to the NMEA In of the device you are connecting to
your Matrix Fishing System. The pinouts of this cable are as follows:
• Red Wire, +12V (output voltage only)
• Black Wire, Ground
• White Wire, NMEA Out.
CAUTION! Please use caution before connecting the red +12V wire to any other NMEA device. This is an
output voltage provided by the Matrix unit and GR4 receiver and should only be connected to those
NMEA devices that need a 12 volt input.
GPS Receiver Installation
To optimize performance of the GPS receiver, mount it in an area that has full exposure to the sky.
The effective area of reception is 10° above the horizon.
Different circumstances determine the mounting method appropriate for your GPS receiver.
If you have… Then use:
An antenna stem with standard 1” – 14 thread Stem Mount with 1" - 14 Thread
Access under mounting location Access Under Mounting Location
No access under mounting
location No Access Under Mounting Location
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Connecting a GR4 GPS Receiver to the Matrix
Here's how to access GPS functionality using your GR4 GPS Receiver Accessory:
1. Attach the GR4 GPS receiver to your Matrix Control Head COM port using the NMEA cable
attached to the antenna.
2. If you are already using other Matrix accessories plugged into the COM connector, you will
also need to use the AS-YC ("Y") cable included in your GR4 GPS Hardware Kit so that you
can use both the accessories and your GPS Receiver at the same time. Attach the COM
connector of the "Y" cable directly to your Matrix Control Head COM port. Attach the GR4
GPS receiver to the NMEA-COM connector of the "Y" cable. Re-connect your Matrix
accessories to the ACCY-COM connector of the "Y" cable.
3. Power up the Matrix Fishing System (see your Matrix Operation Manual for details).
4. When the Matrix detects the NMEA input from the GPS Receiver, the Combo, Track and
Bird's Eye Views will be added automatically to the VIEW key function. A Navigation menu
tab and the Navigation X-Press menu will also be added automatically to the Menu system.
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NMEA Output