User's Manual

APPLICANT: MOTOROLA EQUIPMENT TYPE: ABZ89FC4823
User / Operational Manual
Functional Description / Operation of Modules (Draft)
EXHIBIT D1-6
Receiver Overview
The Receiver Module provides the Receiver functionality for the UHF station. The Receiver module 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).
The Receiver Module kit contains an on-board, varactor-tuned preselector, which cover the frequency ranges of
403–470 MHz, and 450–524 MHz, respectively. The UHF range Receivers utilize an external coaxial-resonator
bandpass filter (BPF) for some configurations.
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.