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General| Brand | Yaesu |
|---|---|
| Model | FT-227R |
| Category | Transceiver |
| Language | English |
Explains FM signal generation, audio processing, modulation, amplification, and RF output stages.
Covers signal input, mixing, IF stages, and squelch operation for receiving signals.
Details the PLL circuit, VCO, and phase comparator for generating heterodyne signals.
Describes optical coupling, BCD counting, data selection, programmable divider, and LED display drivers.
Outlines the DC power supply system, voltage regulators, and voltage distribution for the unit.
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