User's Manual

MA 2000 System Elements
BTS/BDA Side Elements
MA 2000 Installation and Configuration Guide 14
Table 2-2 2. RIU Front Panel LEDs
LED Description
PWR ON – input power is within the required range
RUN A set of LEDs is provided for each service supported by the RIU.
Green Flashing – corresponding BDAC module is operational
DL Overload Red – DL RF input is disconnected due to:
Input power exceeding maximum allowed level
Software setting
Red Flashing: DL RF
output exceeds the maximum allowed value.
DL Low Signal DL power is under the minimum required level
RIU Lite Rear Panel
The RIU rear-panel contains the RF, control and power connections. The BDA side connections
correspond to the number of installed modules. The following figure shows an example of an
RIU model supporting two BDAs.
Figure 2. RIU Lite Rear Panel
Table
2. RIU Rear Panel Connectors
Connector Description
CELLULAR/PCS DUP Duplex connections to BDA services.
UPLINK/DOWNLINK Base Unit connections. Each pair of UL/DL connections (i.e. Uplink 1 and
Downlink 1) connects to the corresponding RF connections on a Base Unit
module, where an 8-port BU consists of two modules and therefore would
require two pairs of connections.
RS485 Connections to MA 410/430 controller rear panel RS485 connector (either
port 1 or 5 on the controller)
PWR DC power connection – 20 to 48 VDC
Service connections
Control connectionBU connections
Power