User's Manual Part 1

Table Of Contents
3EM21522AAAA Genera
l
Issue 1, March 2008 DTR-0200-SA-SIRIUS
1-1
1 GENERAL
1.1
INTRODUCTION
The Terrestrial Satellite Repeater is a modular solid-state device that receives audio/
video multiplexed data transmissions via a SIRIUS Satellite. The repeater then pro-
cesses the received
data and retransmits it through tower mounted antennas to end
users’
receivers.
Figure 1 - 1 is a simplified diagram of a SIRIUS Terrestrial Repeater broadcast system.
A repeater site (part of the broadcast system) includes a Very Small Aperture Termi-
nal (VSAT) antenna with a Low Noise Block converter (LNB) attached, a Global
P
ositioning System (GPS) antenna, a repeater unit, and tower mounted transmitting
antennas.
The repeater site interfaces to a SIRIUS Network Management Center (NMC) via
TELCO lines to monitor repeater operational status
.
Figure 1 - 2
illustrates a typical repeater site layout.
Figure 1 - 1 Typical Sirius Terrestrial Repeater Broadcast System
CDDS
Over RS-422
Multiplex Source
VSAT Uplink
Studio
Intelsat 6 Ku Band
COFDM
Mobile Receivers
DTR-1000
02/22/07
Terrestrial Repeater
DVB-S
DVB-S2
Duration: 347.38 mSec
COFDM Clock Rate: 8.1921375 Mbaud
Terrestrial Broadcasting
COFDM Transmission Frame
Guard
Interval
184 Bits
2048 Bits
Guard
Interval
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Guard
Interval
184 Bits
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1275 Segments
Guard
Interval
184 Bits
2048 Bits