System Operation; Figure 2-6 Downlink (Base Station To Wireless Devices); Figure 2-7 Uplink (Wireless Devices To Base Station); Section 2.5 System Operation - ADC InterReach Fusion Installation, Operation And Reference Manual

System Operation

2.5
The Main Hub receives downlink RF signals from
a base station using 50 Ohm coaxial cable.
Main Hub
Main Hub
The Main Hub sends
uplink RF signals to a
base station using
50 Ohm coaxial cable.
2-8
CONFIDENTIAL
System Operation
Downlink (Base Station to Wireless Devices)
Figure 2-6
The Main Hub converts the RF signals to IF, then
to optical signals and sends them to Expansion
Hubs (up to four) using optical fiber cable.
Uplink (Wireless Devices to Base Station)
Figure 2-7
Expansion Hub
The Main Hub receives
the optical signals from
the Expansion Hubs (up
to four) using optical
fiber cable and con-
verts them to RF sig-
nals.
InterReach Fusion Installation, Operation, and Reference Manual
The Expansion Hub converts the optical sig-
nals to electrical signals and sends them to
Expansion Hub
RAUs (up to eight) using 75 Ohm CATV cable.
The Expansion Hub
receives the IF signals
from the RAUs (up to
eight) using CATV cable
and converts them to
optical signals.
RAU
The RAU converts the IF signals
to RF and sends them to passive
antennas using 50 Ohm coaxial
cable.
RAU
The RAU receives uplink RF
signals from the passive
antenna using 50 Ohm coaxial
cable and converts them to IF
signals.
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