User`s manual

100-M0056X2B 6 of 28
www.cobham.com/gms
2.0 Acronyms
This section lists and describes the various acronyms used in this document.
Name Meaning
16 QAM 16-state Quadrature Amplitude Modulation
64 QAM 64-state Quadrature Amplitude Modulation
A/V Audio/Video
AES Advanced Encryption System (32 bit)
ABS Messenger Basic Scrambling (8 bit)
ASI Asynchronous Serial Interface
COFDM Coded Orthogonal Frequency Division Multiplexing
CVBS/Y Composite video/Luminance with S-video
C Chroma video
D/C Down-Converter
FEC Forward Error Correction
GUI Graphical User Interface
I/O Input/ Output
Kbaud Kilobaud per second
Kbps Kilobits per second
Mbps Megabits per second
MDL Messenger Digital Link
MDL-B Messenger Digital Link, Broadcast Version
MDR Messenger Digital Receiver
MDR-B Messenger Digital Receiver, Broadcast Version
MDT Messenger Digital Transmitter
MDT-B Messenger Digital Transmitter, Broadcast Version
MER Modulation Error Rate
MPEG Moving Picture Experts Group
NTSC National Television System Committee
PAL Phase Alternation Line
QPSK Quadrature Phase Shift Keying
RF Radio Frequency
RX Receiver
S/N Signal-to-Noise Ratio
THD Total Harmonic Distortion
SDI Serial Digital Interface
TX Transmitter
VDC Volts (Direct Current)
3.0 Introduction
The Broadcast version of the Messenger Digital Link (MDL) includes the Broadcast version of both the
Messenger Digital Transmitter (MDT-B), the Messenger Digital Receiver (MDR-B), and one or two
external Down Converters (sold separately) for frequencies exceeding the direct input of 861 MHz.
The MDT-B (Messenger Digital Transmitter, Broadcast version) also works with any DVB-T compliant
receiver.