DM240XR High-Speed Digital Modulator
Introduction
TM120 – Rev. 1.1
1-1
Introduction
1
This chapter provides an overview of the DM240XR High-Speed Digital Modulator. The
DM240XR will be referred to in this manual as “the DM240XR”, “the modulator”, or “the unit”.
1.0 Description
The New Standard in Digital Modulator Performance
Radyne’s DM240XR family of High-Speed Modulators is the ideal choice to meet the exacting
standards of High Data-Rate Video, Internet and Fiber Restoral Satellite Applications. The
DM240XR offers various options that comply to the international standards, supporting both DVB-
S and DVB-S2 specifications. With a variety of frequency options and Plug-In Data Interfaces
(PIIC), it provides greater flexibility for changing and upgrading the unit the required application.
The DVB-S Network specification complies with both EN300-421 and EN301-210 ETSI
specifications. The DM240XR supports FEC rates of BPSK, QPSK, 8PSK and 16QAM
applications with symbol rates up to 68 Msps
The DVB-S2 Network specification complies with the next generation DVB open standard
supported by ETSI EN302-307. At the core of this standard is a powerful Bose-Chaudhuri-
Hocquenghem BCH encoder and concatenated Low-Density Parity Check (LDPC).
The powerful new onboard Monitor and Control (M&C) processor has the unique capability to
download firmware and enhance features from a field-changeable Flash Card. Offering
unprecedented flexibility, this feature represents a new level of Radyne outstanding Customer
Support. Additionally, features are added to the installed equipment base with extreme ease,
allowing the equipment to expand with changes in service while lowering initial installation
budgets.
The Modulator offers a frequency-agile IF Output from 50 to 90, 100 to 180 MHz (70/140), or 950
to 2050 MHz (L-Band) in 100 Hz steps. Variable data rates from 1 Mbps to 238 Mbps can be set
in 1 bps steps.
Additional features include the choice of remotely interfacing through one of three onboard
connections: 10 Base-T/100 Base-T Ethernet, RS-485, or RS-232. The familiar Radyne Front
Panel (Figure 1-1) offers push-button control of all features and a backlit LCD display. Menus are
specifically designed for ease of use and quick online operation as well as changes in all
modulator configurations.
An optional 1:1 Redundancy Control Switch (RCS11) is available to provide the DM240XR with
superior system reliability.
Figure 1-1. DM240XR
Summary of Contents for DM240XR
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Page 12: ...Introduction DM240XR High Speed Digital Modulator 1 2 TM120 Rev 1 1 ...
Page 16: ...Installation DM240XR High Speed Digital Modulator 2 4 TM120 Rev 1 1 ...
Page 19: ...DM240XR High Speed Digital Modulator Theory of Operation TM120 Rev 1 1 3 3 ...
Page 55: ...User Interfaces DM240XR High Speed Digital Modulator 4 36 TM120 Rev 1 1 ...
Page 67: ...Rear Panel Interfaces DM240XR DVB High Speed Digital Modulator 5 12 TM120 Rev 1 1 ...
Page 69: ...Maintenance and Troubleshooting DM240XR High Speed Digital Modulator 6 2 TM120 Rev 1 1 ...
Page 79: ...Technical Specifications DM240XR High Speed Digital Modulator 7 10 TM120 Rev 1 1 ...
Page 103: ...Appendix A DM240XR High Speed Digital Modulator A 24 TM120 Rev 1 1 ...
Page 124: ...DM240XR High Speed Digital Modulator Appendix B TM120 Rev 1 1 B 21 ...