Installation Of Display Unit - Raytheon Pathfinder 1200 Instruction Manual

4.3 INSTALLATION OF DISPLAY UNIT
4.3.1 Selecting the Location
Ideally, the Display Unit should be located in the wheelhouse so the radar screen can
be viewed when looking forward from the wheel. The Display Unit can be mounted on top
of the chart table hung from the overhead, or installed against the bulkhead.
To minimize interference the location chosen should be at least 1 meter away from
the ships compass and Loran C receiver.
4.3.2 Mounting the DIsplay Unit
Using the outline drawing of Figure 103 as a guide, install the Display Unit and secure
to the mounting surface. Note that the yoke of the Display Unit can be attached above or
below the unit.
4.3.3 DC Power Connector
A three pin connector is furnished for connecting the 13.6 Vdc power to the radar.
The power cable from the 13.6 volt power source to the radar should be number 14
stranded wire for a run of less than 10 feet. Longer cable runs require an even larger wire
size to minimize the voltage drop (Table 4-1). Connections should be made directly to the
battery. Check that all connections are clean and bright. The
(+)
battery wire must be
connected to pin 1 of the connector and the ( -) battery wire to pin 3 of the connector.
Pin 2 should be connected to the ships RF ground system. Should the power connections
be inadvertently reversed, protective fuse F 1 (7A), located on the rear panel, will blow.
Recheck the input power leads for correct polarity with a YOM, reconnect the leads observ-
ing correct polarity and replace the fuse.
3 (-I
LARGE
KEY 2 (!l
12 VOLTS
INPUT
VOLTAGE
AWG WIRE SIZE
10' 20' 30'
40'
POWER CABLE LENGTH
TABLE 4-1 POWER CABLE SIZE VERSUS LENGTH
4-4