User's Manual

3. Functional Description

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Status LEDs

The status LEDs provide a visual warning of an alarm condition. The color of

the LED indicates the severity of the alarm.

Expansion Ports

The Expansion UL and Expansion DL ports are QMA female connectors

that are used to connect to two RUs to receive the additional bands. These ports

must be terminated if not used.

Mains Connector

The EU receives its power through the Mains connector . The type of connector is

dependent on the EU model. A 4-pin Amphenol connector is used for AC models and

standard DC models. A 7-pin Amphenol connector is used for DC models powered

by a dual cable supply.

Ctrl Connector

The Ctrl connectors are DB-9 male connectors and are used for external

modem communication with RUs.

Local Port RS-232

The RS-232 ports are standard DB-9 female connectors used for external

modem communication with another EU.

Probe Port

The probe ports are QMA measurement probes that allow the measurement of the

antenna outputs without disconnecting the antennas. The coupling is as follows:

Port Coupling dB typ.

2300 MHz 41.5

E F

B D