ADC 75-192 - Manual (Page 13)

ADCP-75-192 • Issue 2 • June 2007
Page 1
© 2007, ADC Telecommunications, Inc.
1 SYSTEM OVERVIEW
This section provides an overview of the Digivance CXD/NXD system intended for someone
configuring system parameters (referred to as “objects” in the software used). This overview
includes a general description of the physical components and a more detailed description of the
software components because the tasks in this manual involve mostly the software components.
1.1 General Description
The Digivance CXD/NXD is an RF signal transport system providing long-range RF coverage
in areas where it is impractical to place a Base Transceiver Station (BTS) at the antenna site.
The Digivance Hub is connected via optical fibers to Radio Access Nodes (RANs) distributed
over the geographical area of interest. Each RAN provides one RF antenna. The Digivance
system allows the RF signals to be transported to remote locations to expand coverage into areas
not receiving service or to extend coverage into difficult to reach areas such as canyons, tunnels,
or underground roadways.
1.2 Basic Components
Figure 1 shows the main components of a Digivance system, the Hub and RANs. As shown, the
Hub interface with the BTS and the RAN interaces with cellphone users. The figure shows a
CXD system with dual-band SMR A and SMR B configuration.
Figure 1. Digivance Architectural Summary Diagram (CXD System Shown)
CXD
RAN 1
SMRA/
SMRB
CXD
RAN 2
SMRA/
SMRB
CXD
RAN 3
SMRA/
SMRB
CXD
RAN 4
SMRA/
SMRB
CXD
RAN 5
SMRA/
SMRB
CXD
RAN 6
SMRA/
SMRB
CXD
RAN 7
SMRA/
SMRB
CXD
RAN 8
SMRA/
SMRB
SMR A
BTS
CXD
Hub
SMR B
BTS
20799-A