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ManualsBrandsADC Telecommunications ManualsElectronicsDigivance CXD 800 MHz A and B Band System
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ADCP-75-192 • Issue 1• December 2005 • Section 1: Overview
Page 1-9
2005, ADC Telecommunications, Inc.
4. Base Station Interface Module (BIM). The BIM is a multi-port transition module used to
interface with the Tenant’s base station sector. The BIM accepts either duplexed or non-
duplexed RF from the base station sector and provides the Digivance CXD-Hub RF
section separate transmit and receive paths.
5. Ethernet hub with twenty four (24) ports.
6. -48 VDC Power Distribution Unit.
7. Hub Reference Module (HRM).
The Attenuator Rack, BIM, Ethernet Hub and HRM are sold as accessory items. The
functionality of each of these card assemblies is defined in the following sections.
3.6.1 Digital CompactPCI Chassis & Backplane
The CompactPCI Digital Chassis houses cooling fans, the CPU, System Interface (STF2)
module, Sonet Interface (SIF) module, Reverse Simulcast Card (RSC), and power supplies.
The backplane provides the distribution for clock, communication, control data and timing.
3.6.2 RF CompactPCI Chassis & Backplane
The CompactPCI RF Chassis houses the cooling fans, RF transceiver modules, Hub Up
Converter (HUC), Hub Down Converter (FBHDC), Forward Simulcast card (FSC) and the
power supplies. The backplane provides the distribution for clock, communication and control
data and timing. RF and digital RF signals are interconnected between modules using the
appropriate cabling.
3.6.3 Central Processing Unit (CPU)
The Hub CPU is a cPCI single board computer with hot swap capabilities. The Operating
System of the Digivance CXD uses LINUX. There is one CPU per digital chassis. A Hub CPU
performs the following functions:
1. Manages a subset of Hub hardware including RF and Digital equipment.
2. Manages RANs connected to its Hub managed hardware.
One of the Hub CPUs must be configured as the Hubmaster processor. In addition to its regular
Hub CPU duties it is responsible for:
1. Reporting Tenant status.
2. Controlling all Tenant specific functions.
3. Synchronizing the date for all attached nodes.
4. Managing gain & delays.
5. Monitoring signal presence and quality.
6. Managing network services such as DHCP and DNS.
7. EMS.