Chapter 1. Introduction; Overview; Figure 1-1. Crs-170A L-Band 1:1 Redundancy Switch Module - Comtech EF Data CRS-170A Installation And Operation Manual

Chapter 1. INTRODUCTION

1.1

Overview

Figure 1-1. CRS-170A L-Band 1:1 Redundancy Switch Module

The CRS-170A L-Band 1:1 Redundancy Switch Module (Figure 1-1) is an L-Band Tx-Rx IF signal switch. It is
designed for use with Comtech EF Data L-Band satellite modems in a 1:1 redundant (Online 'A' and Backup
'B') configuration.
The CRS-170A is compatible for use with the Comtech EF Data modem listed in Table 1-1. This table also
summarizes the CRS-170A 1:1 IF Switch applications, including requirements for supporting data switching
hardware and software.
The CRS-170A monitors the faults of the 'A' and 'B' modems and determines which modem should be
online. The data switch is built into each terrestrial data interface inside both modems (excluding the
CDM-600L [CLM-9600L] and SDM-300L3 modems, which require ancillary switching devices).
1–1