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Raytheon NAV398GPS LORAN Manual

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accepting position data in the NMEA format. Please refer to the Raystar 108
or Raynav 508/508A instruction manuals for details on making this type of
interconnection.
Data Input
One feature of the NAV398 is to transfer the
waypoint
and route memory
contents of the internal memory to external computer files and to re-load the
memory from the computer.
Downloading of files occurs through the Data Output connections (Green
and Yellow wires). To Upload files into the NAV unit the Data Input wires
of the power cable assembly should be used. Make connections as follows:
DATAIN + = WHITE
DATA IN
-
= BROWN
The data Input must be in the NMEA 0 183 format using the WPL and RTE
sentences.
2.3.4 Ground Connection
One important need in any installation is to obtain the cleanest, noise-free
signals possible, for measuring and calculating your position. Part of this
requirement can be met by assuring a proper connection from your NAV unit
to the ship’s ground system. The ground system provides both a completion
of the signal path for the sensor and a drain for noise sources.
There are two separate wires labeled “GROUND” in the cable assembly.
Both the WHITE and BROWN wires should be connected to the nearest
connection point of the ship’s
Rl?
ground system.
Normally, on a steel hull boat, a good clean connection to the ship’s hull
makes a sufficient ground. On Fiberglas or wood hull vessels, connection to
a ground plate or to the engine block or other bonded groundwork should
provide acceptable grounding.
INSTALLATION 2-7
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