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
antennas 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 customers NMEA 0183
talker(s) to transmit a compatible message or
messages at 4800 baud (see Figure 42). Refer
to Verifying the NMEA 0183 Message on
page 57 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 43.
d.
Plug the terminal strip connector into the rear
panel of the ICM.
Data Type
Compatible Messages
True or Magnetic
Heading
$--HDG
$--HDM
$--HDT
$--OSD
$--THS
$--VHW
Position
$--RMC