Comtech EF Data CDM-500 Dokumentacja Pobierz pdf (Strona 16)

Rev. 1.3 1–1

Chapter 1.

INTRODUCTION

1.0 Introduction

The CDM-500 (Figure 1-1) is a very low-cost Closed Network Satellite Modem, intended

for VSAT applications. It offers variable data rates from 2.4 to 512kbps, in BPSK and

QPSK modes. It is extremely compact, being 1U high and 12 inches deep, and consumes

only 18 watts. It has a front panel VFD display and keypad for local configuration and

control, although it can be fully remote-controlled. For 1:1 applications the CDM-500 is

supported by a low-cost external switch, the CRS-100. For Hub applications, the CDM-

500 is supported by a low-cost 1:N switch, the CRS-200. Its fast acquisition time makes

it attractive for both demand-assigned and fixed-assigned SCPC applications.

Figure 1-1. CDM-550 Satellite Modem

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Comtech EF Data CDM-500 Dokumentacja Strona 16