User Manual

ADCP-75-159 • Issue 1 • August 2003 • Section 1: Overview

Page 1-3

2.2 Enhanced Base Transceiver Station to Host Unit Interface

The HU may be interfaced with one or more EBTS’s. Each EBTS provides the RF channel

inputs and outputs for a designated sector. Interfacing the HU with multiple EBTS’s will

generally require installation of the SMR Interface Panels which are accessory products for the

Digivance system.

Two types of Interface Panels are available: the Primary Interface Panel and the Expansion Panel.

The Primary Interface Panel provides attenuation of the forward path signal to the level required

for input to the Host Unit. The Primary Interface Panel also provides forward and reverse path

combining and splitting to permit up to 6 EBTS’s to be connected to a single Host Unit. A typical

Primary Interface Panel configuration with multiple EBTS’s connected to a single Host Unit is

shown in Figure 1-2.

Figure 1-2. EBTS/HU Interface with Primary Interface Panel

The Expansion Panel is used in conjunction with the Primary Interface Panel when the Host

Unit must be interfaced with more than six EBTS’s. Each Primary Interface Panel can support

two Expansion Panels and each Expansion Panel can support up to six EBTS’s. When

configured as shown in Figure 1-3, a total of eighteen EBTS’s can be interfaced with one Host

Unit.

18820-A

HOST UNIT

3 x 1

ENHAN. BASE

TRANSCEIVER

STATIONS

ENHAN. BASE

TRANSCEIVER

STATIONS

PRIMARY

INTERFACE

PANEL

FILTER