1.1.7 Redundant System; Figure 1-5. Redundant Kst-2000A System Block Diagram - Comtech EF Data KST-2000B Installation And Operation Manual

Ku- Band Satellite Transceiver
Introduction

1.1.7 Redundant System

A block diagram of a redundant KST-2000A system is shown in Figure 1-5. For the
KST-2000B, LNBs replace the LNAs. The KST-2000A/B contains all the logic and
circuitry to sense the need to switch channels and to drive the RF switches.
The basic operation of the redundant system is identical to the single thread except that
two independent TX and RX channels are provided. Initial selection of TX and RX
channels is via the remote M&C or keypad.
During operation, and when a fault is detected in one channel, an automatic switchover to
the other channel occurs. The RJU-2000 provides IF I/O selection and converter interface
connections.
TX IF
REMOTE
M&C
RX IF

Figure 1-5. Redundant KST-2000A System Block Diagram

TX IF
TX RF
REMOTE
C0NVERTER UNIT
RX IF
1 : 1
RJU-2000
1 : 1
TX IF
TX RF
REMOTE
C0NVERTER UNIT
RX IF
1–9
HPA
LOAD
LNA
RX RF
HPA
LNA
RX RF
Revision 9
MN/KST2000AB.IOM
OMT
TRF