What The Satellite Receiver Does; Figure 1.5: Typical Satellite System; Figure 1.6: What The Satellite Receiver Does - TANDBERG Alteia Instruction Manual

evolution 5000
Encoder (1)
ì
ï
1 2 3
ï
4 5 6
7 8 9
TANDBERG
0 * ±
ï
evolution 5000
ï
Encoder (2)
Ethernet
ï
Local ï
Inputs í
1 2 3
4 5 6
ï
7 8 9
TANDBERG
0 * ±
ï
evolution 5000
ï
Ethernet Encoder (n)
ï
ï
ï
1 2 3
4 5 6
î
7 8 9
TANDBERG
0 * ±
Ethernet
Transport Stream
MPEG-2
Processor
TS
10baseT
evolution 5000
Multiplex Element Manager

Figure 1.5: Typical Satellite System

1.4.3

What the Satellite Receiver Does

The Receiver can be tuned to a specified satellite channel frequency and
polarisation. Referring to Figure 1.6, the input is down-converted via a
Low-Noise Block (LNB) to provide an L-band input to the Receiver. The
front-end tuning is microprocessor controlled with a frequency synthesised
local oscillator. A software tuning and acquisition algorithm resolves
translation errors (mainly due to the LNB).
The signal is then passed to a demodulator that recovers the signal using
soft-decision decoding. The resulting stream is Reed-Solomon decoded and
descrambled to provide inputs to the decoder circuit. The received channel
may contain multiple services, therefore the Receiver's demultiplexer is
configured to select a single video service and other audio/data
components and present them at the output.
horizontal polarisation
vertical polarisation
f
n

Figure 1.6: What the Satellite Receiver Does

Instruction Manual: Alteia and Alteia plus Professional Receivers and Decoders
ST.TM.E9200.8
evolution 5000
Multiplexer (Main)
TANDBERG
Ethernet
Control
evolution 5000
Multiplexer (Standby)
TANDBERG
Ethernet
Control
Ethernet Hub
f SHF f
n+1 n+3
f f
n+2 n+4
Multiple satellite channels
Multiple services on the tuned satellite channel
evolution 5000
Modulator (Main)
1 2 3
▲
4 5 6
TANDBERG
◄ ►
7 8 9 ▼
0 * ±
Ethernet
Control
Output Router
RS-232
Control
evolution 5000
Modulator (Standby)
1 2 3
▲
4 5 6 TANDBERG
◄ ►
7 8 9 ▼
0 * ±
Ethernet
Control
Ethernet
Control
LNB
Tune to a
satellite
L-band
channel
Multiple components on the selected service
TANDBERG
Up-converter
and HPA
Alteia Satellite Receiver
Select
Select a
components from
service from
the chosen
the satellite
service
channel
Introduction
ALTEIA
ALARM
REMOTE CNTRL
AUTHORIZED
BER STATUS
LOCK MULTIFUNCTIONAL DISPLAY
Alteia Satellite
Receiver
Video
Audio
Data
TS
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