KVH Industries tracphone v3ip Installation Manual page 17

11 Continued
Connect a NMEA 0183 Talker (Optional)
A vessel heading input will enhance the system's
performance. A vessel position input will serve
as a backup to prevent a loss of service if the
antenna's internal GPS fails.
If you want to supply both heading and position
to the ICM, you can either connect a NMEA 0183
talker that transmits both messages, or connect
two devices using a NMEA data multiplexer,
®
such as Actisense model NDC-4.
a. Configure the customer's NMEA 0183
talker(s) to transmit a compatible message or
messages at 4800 baud (see Figure 23).
NOTE: The system does not accept messages that
conform to the NMEA 2000 standard.
b. Make sure the data message(s) includes the
checksum, identifiable by a *xx field at the
end of the data sentence (e.g., $HEHDT,123.4,
T*1F). Do not exceed a 10 Hz input rate.
c. Connect the NMEA 0183 talker or NMEA
data multiplexer to the supplied 2-position
terminal strip connector as shown in
Figure 24.
d. Plug the terminal strip connector into the rear
panel of the ICM.
16
Wire the ICM
Figure 23: Compatible NMEA 0183 Inputs
Data Type
True or Magnetic
Heading
Position
Figure 24: NMEA Wiring (Optional)
ICM
NMEA 0183 Talker
Ship's Heading
and/or Position
Compatible Messages
$--HDG
$--HDM
$--HDT
$--OSD
$--THS
$--VHW
$--RMC
NMEA
Terminal Strip Connector
1 2
NMEA 0183 Talker
B A
Ship's Heading
OR Multiplexer
Ship's Position
GPS