Terrasat IBUC 3, Operation Manual

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Installation and Setup
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7-7
Engineered to Endure
System Cabling Requirements
Tx 1+1 System
Both the A: side IBUC and the B: side IBUC connect to the interface module via a
coaxial cable connection (J1) carrying the L-band, 10 MHz reference and FSK M&C
signals, where appropriate. The J2 connector on the IBUC connects to the interface
module that provides the M&C interface. An additional connector (J4) is used for
TCP/IP between the IBUCs and the interface module. IBUC waveguide outputs are
connected to ports on the Tx RF switch using waveguide bends. DC power (48 VDC)
is provided from separate power supplies to each DC-powered IBUC at connector J3.
The Tx waveguide switch provides the uplink signal to the antenna feed via a
waveguide (customer supplied) or coaxial cable, as required. Power and switching
control are carried on an interface cable from the switch to the interface module.
The interface module provides eleven connectors for interfacing the IFL, the IBUC RF
switch, and M&C functions. Status LEDs built in to the interface module provide
visual system status, as shown in Figure 7.4 . Remote M&C for the 1+1 system is
available by using RS485 or TCP/IP. systems with FSK-capable modems also have
M&C functions available at the modem’s front panel. Local monitoring and control is
available by using a Hand-held Terminal connected at the interface module.
Tx 1+1 Interface Module
Figure 7.4 depicts the top view of an interface module of an interface module of a Tx
1+1 system and identifies the locations of the various connectors.
Figure 7.4
Tx 1+1 Interface Module View