Chapter 1. Introduction; Overview - Comtech EF Data DMD50 Installation And Operation Manual

This chapter provides an overview of the DMD50 Universal Satellite Modem. When describing
the equipment, it may be referred to as "the modem", or "the unit".
1.1

Overview

The Radyne Universal Satellite Modem (Figure 1-1) offers the best features of a sophisticated
programmable IBS/IDR and Closed Network Modem, at an affordable price.
This versatile equipment package combines unsurpassed performance with numerous user-
friendly Front Panel Programmable Functions. The unit provides selectable functions for
different services: Intelsat IDR and IBS, as well as closed networks. All of the configuration and
Monitor and Control (M&C) Functions are available at the Front Panel. Operating parameters,
such as variable data rates, FEC Code Rate, modulation type, IF Frequencies, IBS/IDR Framing
and interface type can be readily set and changed at the Front Panel by earth station operations
personnel.
The modem operates at all standard IBS and IDR Data Rates up to 8.448 Mbps. Selection of any
data rate is provided over the range of 2.4 Kbps to 52 Mbps in 1 bps steps.
For applications requiring system redundancy, the Modem may be used with the Radyne RCS11
1:1 Redundancy Switch or the RCS20 M:N (N < 9) Redundancy Switch. An Internal
Engineering Service Channel Unit is available to provide voice, data, and alarms for Intelsat IDR
applications.
A full range of Industry Standard Interfaces are available. Interface types are selectable from
V.35, RS-232, RS-422/-530, ITU G.703, HSSI, ASI, DVB/M2P and Ethernet Bridge.
MN-DMD50– Revision 3

Chapter 1. Introduction

Figure 1-1. Universal Satellite Modem Front Panel
1–1