Nera Inmarsat-c, Service Manual

Page: 18 / 228

1.3 Connection
1-3
1.3 Connection
1.3.1 Antenna and terminal unit
The antenna unit, IC-115 and terminal unit, IC-215 are connected by the coaxial cable.
This coaxial cable includes 1530.0 MHz to 1545.0 MHz receiving RF signal, 1626.5
MHz to 1646.5 MHz transmitting RF signal, 1575.42 MHz receiving GPS RF signal
and the power supplied to the antenna unit. The transmitting voltage is +29 V DC and
the receiving v7 V DC.
The loss of the coaxial cable is about 10 dB at 1.6 GHz.
To use the cable other than TP5FBAW-5DFBB, optional N-TNC converting cable is
needed to both the antenna unit and the terminal unit.
Fig.1.3.1 Connection of antenna unit and terminal unit
1.3.2 [Junction] port
[Junction] port is connected to the junction box (IC-315).
Fig.1.3.2 Connecting to Junction Box