Introduction - Comtech EF Data CRS-170A Installation And Operation Manual

1.1 Overview
The CRS‐170A L‐Band 1:1 Redundancy Switch module, shown in Figure 1‐1, is an L‐Band Tx‐Rx IF
signal switch designed for use with L‐Band satellite modems in a 1:1 configuration.
The Tx (transmit) side switches four modem output signals that are multiplexed onto the transmit
coaxial cable:
•
950‐1950 MHz L‐band transmit RF;
•
10 MHz BUC frequency reference;
•
600 KHz BUC FSK control and status communication;
•
BUC DC power supply.
The Rx (receive) side of the switch uses both power dividers and relays to provide the redundant
modem interface for three signals multiplexed onto the LNB coaxial cable:
•
950‐1950 MHz L‐band receive RF from LNB;
Chapter 1. INTRODUCTION
Figure 1-1. CRS-170A L-Band 1:1 Redundancy Switch
1–1