MINI-LINK TN R3 ETSI
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
6624
Filter and
Amplifier
Power
Amplifier
Filter and
Amplifier
Low Noise
Amplifier
Received
Signal
Strength
Indicator
Receive RF
Oscillator
RF
Loop
Down-
converter 1
Receive IF
Oscillator
Down-
converter 2
Transmit IF
Oscillator
Up-
converter 1
Transmit RF
Oscillator
Up-
converter 2
Figure 63 Block diagram for RAU1 N and RAU2 N
4.3.4.1 Cable Interface
• Transmit IF signal, a modulated signal with a nominal frequency of 350
MHz.
• Up-link Radio Communication Channel (RCC), an Amplitude Shift Keying
(ASK) modulated command and control signal with a nominal frequency
of 6.5 MHz.
• DC supply voltage to the RAU.
Similarly, the outgoing signals from the RAU are multiplexed in the Cable
Interface:
• Receive IF signal, which has a nominal frequency of 140 MHz.
• Down-link RCC, an ASK modulated command and control signal with a
nominal frequency of 4.5 MHz.
In addition to the above, the Cable Interface includes an over voltage protection
circuit.
7
2
4
/1555-CSH 109 32/1-V1 Uen B 2007-09-14
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