Product Info

METRO CELL OUTDOOR (DE/RE) CDMA BTS RADIO DEVELOPMENT

PROPRIETARY CELL SITE REQUIREMENTS

Issue 01 Stream 00 - 13 - Feb. 2001

6.0 RF Overlay Requirements

The Metro Cell has several overlay options

Basic installation configuration (single channel)

Simple overlay or mini configuration

The Metro Cell can accommodate 1900 MHz FRM’s, 800 MHz FRM’s, or combinations of both.

The FRM is illustrated in Figure 16. Each FRM consists of the following main

components: duplexer pre-selector module (DPM) or triplexer module, transmit receive

module (TRM), power amplifier module (PAM) and fan/plenum assembly. The alarm

indicator module (AIM) is located within the fan unit housing. The PAM, TRM, and fan

unit have the same mechanical dimensions for both 800 MHz and 1900 MHz

configurations. The 800 MHz DPM is taller than the 1900 MHz DPM.

The minimum requirement (1 carrier) is 2 antennas per sector, one for the main path (Tx and one

diversity path) and one for the other diversity path. A two carrier system can also be supported

with two antennas. In this case, each antenna carries one carrier on the Tx side and one diversity

path on the Rx side. With a three carrier system, a third antenna is added to carry just the Tx of the

third carrier

6.1 Cable Connections

The optical link cable, SFRM DC power cable and the GPS antenna cable have a provisionable

length. When ordering, the length must be specified and fall below the maximum length

specifications indicated.

The quantity of inter-DFRM cables required depends upon the application. In a single carrier

system, no inter-SFRM cables are required. In 2 or 3 carrier systems, inter-SFRM cables are

required.

Two sample configurations will be considered for illustrative purposes. These are:

i) a basic system with no redundancy;

Table 6.1:

Number of Carriers

Number of Antennas per

Sector