Technical Description
Xu for example RAU2 Xu 23, indicates compatibility with a C-QPSK
MMU but it can also be upgraded by a Soft Key to be compatible with a
QAM MMU.
• F indicates frequency band.
4.3.4 Functional Blocks
This section describes the RAU internal and external functions based on the
block diagrams in Figure 63 on page 82and Figure 64 on page 83.
Transmit IF
Signal
Processing
DC/DC
Converter
Secondary
Voltages
Cable Interface
Branching Filter
RCC
Control and
Supervision
Processor
Alarm
and
Control
DC
MMU
Alignment Port
Antenna
6623
Transmit RF
Oscillator
Power
Amplifier
Transmit IF
Demodulator
Filter and
Amplifier
RF
Loop
Low Noise
Amplifier
Received
Signal
Strength
Indicator
Receive RF
Oscillator
Down-
converter 1
Receive IF
Oscillator
Down-
converter 2
Figure 63 Block diagram for RAU1 and RAU2
82
12/221 02-CSH 109 32/1-V1 Uen A 2008-03-14
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