Comtech EF Data CDM-710G Dokumentacja Pobierz pdf (Strona 21)

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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.

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Comtech EF Data CDM-710G Dokumentacja Strona 21