Ericsson MINI-LINK TN R3 ETSI Technical Description page 78

MINI-LINK TN R3 ETSI
Transmit IF
Signal
Processing
DC
DC/DC
Converter
MMU
Received
Signal
Strength
Indicator
RCC
Control and
Supervision
Processor
Alignment Port
Figure 63 Block diagram for RAU1 N and RAU2 N
4.3.4.1 Cable Interface
•
•
•
Similarly, the outgoing signals from the RAU are multiplexed in the Cable
Interface:
•
•
In addition to the above, the Cable Interface includes an over voltage protection
circuit.
72
Transmit IF
Oscillator
Up-
converter 1
Secondary
Voltages
Receive IF
Oscillator
Down-
converter 2
Alarm
and
Control
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.
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.
Transmit RF
Oscillator
Filter and Up-
converter 2
Amplifier
Receive RF
Oscillator
Filter and Down-
Amplifier converter 1
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
Power
Amplifier
RF
Loop
Low Noise
Amplifier
Antenna
6624