User's Manual

APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC3797
User / Operational Manual
Functional Description / Operation of Modules (Draft)
EXHIBIT D1-6
Receiver Overview
The Receiver Module consists of a Receiver RF board in a clamshell housing assembly. It provides the Receiver
functionality for the MTR3000 Base Station/Repeater and performs highly-selective bandpass filtering and dual
down-conversion of the desired RF signal. A custom Receiver IC then performs an analog-to-digital conversion of
the desired received signal and outputs a differential data signal to the Station Control Module (SCM).
Overview of Circuitry
The Receiver Module contains the following circuitry:
• Frequency Synthesizer Circuitry – consists a phase-locked loop and Voltage-Controlled Oscillator (VCO),
generates the first LO injection signal
• Varactor-tuned Preselector Filter – provides bandpass filtering of the station Receiver RF input
• Receiver Front End Circuitry – performs filtering, amplification, and the first down conversion of the
Receiver RF signal
• Custom Receiver IC Circuitry – consists a custom IC which performs the second down conversion,
filtering, amplification, and analog-to-digital conversion of the receive signal
• Analog to Digital Converter (ADC) Converter Circuitry – converts analog Receiver status signals to digital
format for transfer, upon request, to the SCM
• Local Power Supply Regulation – accepts +8V, +10V and +14.2V inputs and outputs +2.775V, +3.3V, +5V,
+10V, and +14.2V operating voltages
Input and Output Connections
The following shows the Receiver module input and output external connections.