COBHAM 7516A User Manual

98-175666-A 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)
Connect cables Purpose
NMEA0183 Slave BDU to Master BDU NMEA heading input
LAN 1 Slave BDU to LAN 3 on Master BDU Dual communication
Master BDU LAN1 to GMU LAN1 Modem control
Master RS-232 to GMU RS-232 Modem control
Master/Slave RS-422 to GMU RS-422 Modem control & keyline
Master BDU TX In to TX Splitter TX when Master is active
Slave BDU TX In to TX Splitter TX when Slave is active
Master BDU Rx Out to RX Combiner RX when Master is active
Slave BDU Rx Out to RX Combiner RX when Slave active
VSAT modem TX out to TX Splitter Input from VSAT modem
RX combiner to VSAT modem RX In Output to VSAT modem
Table B-1: Dual mode antenna, cabling
Master BDU
Slave BDU
TX Splitter RX Combiner
VSAT Modem
TX out
VSAT Modem
RX in
NMEA 0183
Heading input
GMU

COBHAM 7516A Specifications

General

Brand	COBHAM
Model	7516A
Category	Antenna
Language	English