User Manual

Users Guide - Andrew InCell™ Fiber Optic Distributed Antenna System
3-2
CDU – ERAU Cabling
To connect an ERAU to any port of the CDU, the downlink and the uplink signals must be
connected using single mode fiber optic cables with Type SC/APC connectors. Each CDU can
interface with up to six ERAUs.
For each of the six ports on the CDU, make the following connections:
• Connect the D/L connector on the CDU to the D/L connector on the ERAU.
• Connect the U/L connector on the CDU to the U/L connector on the ERAU.
• If a composite fiber optic/ copper cable is used, connect the PWR connector on the CDU
to the PWR connector on the ERAU using the plastic 2-pin power connector on the
composite cable
Figure 3-1 shows the basic uplink, downlink and power connections between the CDU and the
ERAU.
Cable Installation Aid
Andrew fiber optic cables have fiber cable markers or use different
color fiber jackets to aid in installation
Cable Route Mapping
It is good practice to have a system diagram or building map and label
the fiber optic cable ends at the CDU. This helps during
troubleshooting cabling and equipment problems.
InCell System Cabling Flexibility
It has been Andrew’s experience that system installation labor costs are typically higher than the
cost of the equipment being installed. For maximum flexibility, ease of installation and lowest
cost, InCell™ Enhanced Remote Antenna Units may be connected to the CDU hub in several
ways. Designers and installers may determine the lowest cost approach for each specific in-
building application.
The InCell™ product line was designed to use a single composite cable to provide fiber optic
capability and electrical current to each remote antenna. Generally, the use of composite cables
reduces the labor costs of installing in-building distributed antenna systems. Alternate methods
of system cabling are also discussed in this paper.