User Manual

Understanding the Sector Radio Kit and the Antenna Interface Unit
IP-RN 8000 Installation & Commissioning Guide 17
Understanding the Antenna Interface Unit module
The Antenna Interface Unit (AIU) is a pre-installed unit residing in the lower part of the front of the cabinet.
See Figure 9
and Table 11.
The AIU contains filters and duplexors.
The AIU is divided into three sectors, one for each radio sector, from left to right: alpha, beta, and gamma.
Each radio sector has two receive antenna connectors and one transmit antenna connector that connect to
corresponding connectors on the appropriate Sector Radio Kit.
This AIU has nine ports on the faceplate, three for each sector. During installation, you connect these
faceplate ports Sector Radio Kits.
The AIU also has ports on the rear side that you cannot see. There are two versions of the AIU that differ in
the number of rear-facing ports: the 6-port AIU and the 9-port AIU. The rear-facing ports are connected to
the surge suppression bar, and then to RF antenna cables. The 6-port AIU is the standard configuration.
The AIU is field-replaceable but it is not hot swappable. Therefore, replacing the AIU is service disrupting
for all sectors.
Table 10 Power Amplifier faceplate components
Component Description
Captive screw(s) Tighten to secure the PA in its slot.
Loosen to remove the PA from its slot.
Power switch Flip up to turn on power to the PA.
Push down to turn off power to the PA.
LEDs Power Lights green when the PA receives power.
Fail Lights red when the PA has failed.
RF On Lights green when the RF is applied.
Interfaces TX (Sample) Connects to an external spectrum analyzer. Carries a duplicate of
the TX signal for sampling purposes. Connector type: SMA
receptacle
TX (to AIU) Connects to the TX interface on the AIU using a cable installed
during the installation process. Transmits the radio signal from the
PA to the AIU for filtering and transmission from the cell tower
antenna. Connector type: SMA receptacle.
TX input from RM Receives the transmit radio signal generated by RM. The PA
amplifies the signal and transmits it to the AIU over the TX (to
AIU) interface. Also carries control information from the RM to
the PA and status information from the PA to the RM. Connector
type: blind mate.