Specifications

i
PREFACE
About this Manual
This manual describes the installation and operation of the DMD20/DMD20LBST Universal
Satellite Modem.
Conventions and References
Patents and Trademarks
See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com.
Comtech EF Data acknowledges that all trademarks are the property of the trademark owners.
• DoubleTalk
®
is licensed from "Raytheon Applied Signal Technology".
• DoubleTalk
®
is a registered trademark of "Raytheon Applied Signal Technology".
• Carrier-in-Carrier
®
is a registered trademark of Comtech EF Data.
Related Documents
The following documents are referenced in this manual:
• Department of Defense (DOD) MIL-STD-188-114A, Electrical Characteristics of Digital
Interface Circuits
• Department of Defense (DOD) MIL-STD-188-165A, Interoperability and Performance
Standards for SHF Satellite Communications PSK Modems (FDMA Operation) (dated
November 2005)
• INTELSAT Earth Station Standards IESS-308, -309, -310, and -315
• EUTELSAT SMS
Military Standards
References to “MIL-STD-188” apply to the 114A series (i.e., MIL-STD-188-114A), which provides
electrical and functional characteristics of the unbalanced and balanced voltage digital interface
circuits applicable to both long haul and tactical communications. Specifically, these references
apply to the MIL-STD-188-114A electrical characteristics for a balanced voltage digital interface
circuit, Type 1 generator, for the full range of data rates. For more information, refer to the
Department of Defense (DOD) MIL-STD-188-114A, Electrical Characteristics of Digital Interface
Circuits.