User's Manual

Unit Descriptions - RF Path
P/N 709C011801
Page 38
2.2 RF Path Remote End Site Components
The RF coverage solution remote end components comprise the following elements:
• ICU (Intermediate Centralized Unit) - forwards optics along with DC to the RAU and its sub-modules.
• RAU (Remote Antenna Unit) - provides RF distribution and includes internal antennas. It can also encase data distribution
module (GEM).
• RxU (Remote Expansion Unit) - installed in the RAU. Provides support for two additonal RF services for a total of 6 services
per RAU.
Figure 2-11. RF Path Remote End Components
A detailed description of the remote end components is provided in the following sections
2.2.1 ICU (Intermediate Centralized Unit)
NOTE: The ICU can also be used on the digital path.
The ICU is installed at the floor level. It provides the LC/APC optical interface along with DC power to the RAU RF (and data)
sub-modules. The optical and DC signals are routed via a composite cable connected between the ICU and hosted RAU modules.
The optics signal is provided via one or two dedicated Edge modules that convert MTP optic interfaces to LC/APC interface; the
DC power is provided by up to four dedicated power supplies. A single power connection feeds all ICU power supply modules.
Figure 2-12. ICU Front Panel Interfaces and Modules