Installation Guide

Table Of Contents

Method of Procedure

System Description

14 RFN_3.1 Beta

2.1.2.3 RadioFrame Unit (RFU)

The RadioFrame Unit serves as the access interface between signals received

from mobile terminals and the airlink processing performed in the ACU. The RFU

connects to the ACU via a single CAT 5 connection, and receives its power,

signals, and timing from the ACU. Each RFU holds up to 7 RadioBlades in

combination of: a maximum of 6 iDEN RadioBlades, a maximum of 3 RAPs.

Figure 7 RFU functional diagram.

2.1.2.4 iDEN RadioBlade (RadioBlade or RB)

Each iDEN RadioBlade provides a single RF channel transceiver supporting the

iDEN voice standard. Each RadioBlade contains an onboard omnidirectional

antenna and provides a coverage area of approximately 32,000 square feet

(nominal 100’ radius cell). Each RadioBlade inserts into a slot in the RFU.

Figure 8 iDEN RadioBlade functional diagram.

ACU, B

RB (1)

RFU

Backplane

RB (1)

REM

data, clock,

config, control,

timing and

power

Air Interface

Section

Digital

Processing

Power

Timing

Ethernet

RFU Backplane