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General| Brand | Icom |
|---|---|
| Model | IC-M304 |
| Category | Transceiver |
| Language | English |
General specifications including frequency coverage, power supply, and dimensions.
Transmitter specifications covering output power, modulation, and stability.
Receiver specifications including sensitivity, selectivity, and noise characteristics.
List of all available channels with their transmit and receive frequencies.
Step-by-step guide to safely remove the front panel of the transceiver.
Instructions for detaching and removing the main internal unit.
Procedures for disconnecting and removing the logic unit.
Detailed explanation of receiver circuit functions and signal paths.
Detailed explanation of transmitter circuit functions and signal paths.
Explanation of Phase-Locked Loop circuits for frequency control.
Description of Digital Selective Calling circuits for encoding and decoding.
Overview of the CPU, clock, reset, dimmer, and UART circuits.
Explanation of DC power supply lines and voltage regulation.
Details CPU port functions for various inputs and outputs.
Lists required test equipment and connection diagrams for adjustments.
Details procedures for adjusting lock voltage and reference frequency.
Outlines procedures for adjusting transmit output power and deviation.
Describes the procedure for adjusting receive sensitivity.
Voltage diagram for the logic unit, including SQL and VR units.
Voltage diagram for the main unit of the transceiver.
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