Chapter 1. Introduction; Overview; Figure 1-1. Cdm-740 Satellite Modem - Comtech EF Data CDM-740 Installation And Operation Manual

1.1

Overview

The CDM-740 Advanced Satellite Modem (Figure 1-1) is Comtech EF Data's point-to-multipoint
IP satellite modem that provides integrated DVB-S/S2 CCM and VCM demodulation with low
latency Turbo Product Coding (TPC) return modulation technology. The CDM-740 was developed
as the "spoke" or remote site equipment in hub and spoke network topologies that require high
quality, 'always-on' availability.
Featuring dual Gigabit Ethernet interfaces and industry-leading packet per second (pps) processing
and throughput, the CDM-740 offers the ideal platform for Internet Service Providers (ISPs),
Satellite Service Providers, Enterprise Networks, Offshore, and Broadcasters for a wide range of
applications – point-to multipoint IP networks, rapid ISP market penetration, high speed
communications, high speed content delivery (digital signage and cinema), and IPTV / business
television.
The CDM-740's high-performance architecture allows efficient IP networking and transport over
satellite links while supporting a wide range of applications and network topologies. Key
operational features include:
•
Transmit data rate: TPC 16 kbps to 9.98 Mbps
•
Receive data rate: DVB-S/S2 up to 167 Mbps
•
Transmit IF: 950 to 2150 MHz or 50 to 180 MHz
•
Receive IF: 950 to 2150 MHz
•
Data Interfaces: 2X 10/100/1000 BaseT Ethernet
•
Management: 10/100 BaseT Ethernet with web and SNMP, EIA-232 with CLI
•
Modulation types: TPC QPSK, 8-QAM, 16-QAM
•
Demodulation: DVBS – QPSK; DVB-S2 – LDPC+BCH QPSK, 8-PSK, 16-APSK
•
Firmware – Flash Upgrading

Chapter 1. INTRODUCTION

Figure 1-1. CDM-740 Satellite Modem

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