Comtech EF Data CRS-180 - Manual (Page 21)

1–1
Chapter 1. INTRODUCTION
1.1 Overview
Figure 1-1. CRS-180 70/140 MHz IF 1:1 Redundancy Switch Module
The CRS-180 70/140 MHz IF 1:1 Redundancy Switch module (Figure 1-1) is a 50Ω, 70/140 MHz
Tx-Rx IF signal switch designed for use with Comtech EF Data IF satellite modems in a 1:1
configuration.
The Tx side switches the Online unit onto the transmit coaxial cable. The Rx side of the CRS-180
uses power dividers to provide both demodulators with the same IF signal from the LNB, thus
reducing switching time.
The CRS-180 supports 1:1 redundancy for the Comtech EF Data modems summarized in Table
1-1 . This table also specifies the modem minimum firmware and hardware requirements for
data switching support.