User's Manual

APPLICANT: MOTOROLA SOLUTIONS EQUIPMENT TYPE: ABZ89FC5823B
109AB-5823B
User / Operational Manual
Functional Description / Operation of Modules (Draft)
EXHIBIT D1-6
Functions of the GTR 8000 Base Radio Modules
The following lists GTR 8000 Base Radio modules:
 Transceiver (XCVR) module (with or without transceiver option card)
 Power amplifier module (not applicable in a GPW 8000 Receiver)
 Fan module
 Power supply module
Transceiver Module Overview
The transceiver module provides the control, exciter, receiver, and optional transceiver option card for the base
radio/receiver.
Transceiver Module (Front View)
The transceiver generates the station reference, which typically needs to be locked on to one of many possible external
sources. The external source can be either the site controller TDM clocks or the external reference operating at 5 or 10
MHz. An internal frequency reference operating at 10 MHz is available in an optional transceiver option card.
The transceiver SPI bus allows communication with its receiver and exciter circuitry, as well as the power supply and power
amplifier modules.
There are two or three circuit boards in the transceiver:
• Transceiver Control Board: Performs the control management, digital signal processing, and transmit and receive
data formatting for the base radio.
• Transceiver RF Board: Contains DC power conversion/regulation and performs receiver and exciter functions.
• Transceiver Option Card: An optional board that attaches to the control board. Provides an internal 10 MHz
frequency reference. For conventional base radio/receiver operation it also provides the analog interfaces and wildcard I/Os.
The transceiver option card requires an internal frequency reference oscillator alignment at different intervals that is
mandated by its category and frequency band. See Base Radio Service Help > Service Screens > Alignment Screens in the
CSS Online Help for the alignment procedures and mandated intervals. The transceiver option card is available in two
categories:
• OCXO (Oven Controlled Crystal Oscillator) – operates at 0.1 ppm which is inclusive to temperature and aging.
The OCXO Transceiver Option Card is available in 700/800 MHz, UHF R1/R2, and VHF frequency bands.
• TCXO (Temperature Compensated Crystal Oscillator) – operates at 1.5 ppm, of which 0.5 ppm is allocated to
temperature and 1.0 ppm is allocated to aging. Reference precision with the TCXO is traded for lower power consumption.
The TCXO mandates shorter maintenance intervals. The TCXO transceiver option card is available in UHF R1/R2
frequency bands. The TXCO is only available for non-simulcast conventional systems.
Transceiver Control Board
The main operating software for the base radio is loaded in the transceiver (XCVR) control section. As the main manager
for the base radio, the XCVR control board provides operational control over the other station modules. It handles three
types of information flow, in the following ways:
• Serves as a gateway between the network and RF functionality, by distributing the RF payload to and from the
network.
• Supports operational and diagnostic functions with digital control data (for example: site information, channel
assignments, and identification numbers for call processing).
• Ensures the flow of other network management configuration information.