Humminbird 900 Series - Manual (Page 28)

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:
The pinouts of the pigtail 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 Fishfinder unit and
GPS receiver and should only be connected to those NMEA devices that need a
12 volt input.
Stem Mounting with an Existing 1" - 14 Thread Stem
Follow these steps to stem mount the GPS receiver:
NOTE: If you have an existing stem for mounting the GPS receiver, proceed
directly to step 2 of the following procedure.
1. Determine the best location to mount your GPS receiver. Preplan
and test the cable routing to your control head before any drilling or
cutting of your boat surfaces. If you have purchased hardware to
stem mount your GPS receiver, follow the instructions included with
that hardware to mount the stem (antenna pole).
NOTE: AS-EC10 10' extension cables are available from Humminbird® if your
planned routing exceeds 20', (6 m). Maximum cable length, including extensions,
should not exceed 50' (16 m).
NOTE: Remember to caulk or seal screw holes and drilled holes as needed to
protect your boat from water damage.
2. Screw on the receiver base to the stem
first, making sure that the stem pipe does
not protrude from the receiver base. This
adds protection to the cable when pulling it
through the pipe stem. In addition to this,
de-burr the pipe edges to reduce cable
abrasion.
Receiver 1
Receiver Base 2
Stem Pipe 3
1
2
3
An existing antenna stem with
standard 1" – 14 thread stem
Access for cable routing under
the mounting location
No access under the mounting
location
Stem Mount with Existing 1” -
14 Thread Stem
Access Under Mounting
Location
No Access Under Mounting
Location
21