KVH Industries TracPhone V3-HTS Installation Manual page 17

Continued Wire the ICM
10
Connect an NMEA 0183 Talker
The antenna requires a vessel heading input
from a customer-supplied NMEA talker.
Optionally, you can also provide a vessel
position input to serve as a backup to the
antenna's internal GPS.
To supply both the required heading and the
optional position to the ICM, you can either
connect an NMEA 0183 talker that transmits both
messages, or connect two devices using an
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 25). Refer
to "Verifying the NMEA 0183 Message" on
page 48 to confirm that the message is
transmitting successfully.
NOTE: The system does not accept messages that
conform to either the NMEA 2000 or NMEA 0183
HS standards.
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).
c. Connect the NMEA 0183 talker or NMEA
data multiplexer to the supplied 2-position
terminal strip connector as shown in
Figure 26.
d. Plug the terminal strip connector into the rear
panel of the ICM.
16
Figure 25: Compatible NMEA 0183 Inputs
Data Type
True or Magnetic
Heading
Position
®
Figure 26: NMEA Wiring
ICM
B2
NMEA 0183 Talker
Ship's Heading
Ship's Position*
* Heading is required;
position is optional
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