Table of Contents
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Table of Contents
Related Manuals for Maxon SD-174
Summarization of Contents
Theory of Operation
4.1. Introduction
Explains the radio's composition of two PCBs (RF and digital) and interface.
4.2. Digital Circuits
Describes the CPU, channel select switch, and associated digital circuits.
4.3. RF Circuits
Covers PLL synthesizer, transmitter, and receiver circuit details.
4.4. ACC-513 (GMSK Modem Circuits)
Details the TX/RX signal circuits and level converter for GMSK modem.
4.5. ACC-514 (FFSK Modem Circuits)
Details the TX/RX signal circuits and level converter for FFSK modem.
4.6. ACC-515 (GPS Interface Circuits)
Explains the GPS module's output control and power requirements.
Alignment Procedure
7.1. Receiver
Details RX VCO adjustment and audio output level adjustment procedures.
7.2. Transmitter
Covers TCXO, TX VCO, and CTCSS/DCS deviation adjustments.
7.3. Squelch Adjustment
Explains squelch adjustment for narrow and wide band operations.
7.4. Test Equipment Setup
Illustrates test equipment setup for transmitter and receiver calibration.
Interfacing
8.1. External connections
Describes external connections via BNC and DB-15 sockets.
8.2. DB-15 PIN descriptions with input/output level
Lists DB-15 connector pin functions, descriptions, and signal types.
8.3. Internal components
Shows signal level selectors and channel selector switch settings.
8.4. Option board pin-out chart
Details pin configurations for GMSK, FFSK, and GPS option boards.
8.5. Wiring Diagram
Provides a schematic showing internal board connections and connectors.
Electrical Parts List
11.1. Parts List for SD-161
Lists electrical components for the SD-161 model with part numbers and references.
11.2. Parts List for SD-164
Lists electrical components for the SD-164 model with part numbers and references.
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