98-175666-C
Appendix B: Dual antenna solution
B-3
Installation of the dual antenna solution
B.2.2 Installation
To install the dual antennas, do as follows:
1. Install the master ADU, BDU, the RX combiner and the VSAT modem.
2. Install the slave ADU, BDU and the TX splitter.
3. Provide vessel heading input to the master BDU and slave BDU.
4. Connect the cables.
Figure B-2: Dual mode antenna, connecting cables (example)
Cable
Connection
Purpose
1
NMEA0183 to Slave BDU and to Master BDU NMEA heading input
2
Master BDU LAN1 to GMU LAN1
OpenAMIP
communication
3
Master BDU LAN3 to Slave BDU LAN1
Dual communication
4
Master BDU RS-232 to GMU RS-232
GMU control
5
Master and Slave BDU RS-422 to GMU RS-422 GMU Keyline splitter
6
Master BDU Tx in to TX splitter out
Tx when master is active
7
Slave BDU Tx in to TX splitter out
Tx when slave is active
8
GMU Tx out to TX splitter in
Tx from GMU
9
Master BDU Rx in to RX splitter in
Rx when master is active
10
Slave BDU Rx in to RX splitter in
Rx when slave is active
11
GMU Rx in to RX splitter out
Rx from GMU
Table B-1: Dual mode antenna, cabling
Master BDU
Slave BDU
TX Splitter
RX Combiner
VSAT Modem
TX out
VSAT Modem
RX in
VSAT Modem control
TCP/IP or
RS-232 or RS 422
NMEA 0183
Heading input
1
2
3
4
5
6
7
8
9
10
11