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Provides technical information for FCC certification.
Records changes and updates made to the document.
Lists supporting documents for further technical information.
Defines key abbreviations and acronyms used in the manual.
Details the 12RII-RC radio system, its interface, and operation.
Details the 12RII-LC Clean Cab radio system and its interface.
Describes the 12RII-SR Serial Remote radio system (future option).
Lists parts for the 12RII Front Panel Assembly for LC version.
Explains the overall architecture and common chassis of the 12RII radio.
Presents block diagrams for RC, LC, and SR radio systems.
Identifies interface signals for connectors used in radio systems.
Shows standard connector configurations for RC, LC, and SR radio models.
Explains the PSB's role in voltage regulation and presents its block diagram.
Details PSB external voltage connections via terminals J1-J4.
Details interface voltages to RFPA and RCB modules from the PSB.
Lists components for the PSB and references its schematic diagram.
Describes RCB functional areas, RPM, and digital interfaces.
Details audio circuits, signal paths, drivers, and I/O interfaces.
Covers digital tuning, squelch, signal strength, and MSK data functions.
Presents the overall block diagram of the radio system.
Details the functions of standard controls on the 12RII front panel.
Presents the block diagram for the Front Panel module.
Lists parts for the Front Panel assembly and board, and references schematic.
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General
