# ICOM IC-22 and IC-240 HAM-Radio

# WIN*Scanner*

#### Software for Icom

## Block Diagram B-200D PLL Board

FrequencyStep = f_{ref} : 1024 = 12800000Hz : 1024 = 12500Hz

VCO_{frequency} = (f_{LoopMixer} x 3) + (N x FrequencyStep x 2)

VCO_{frequency} = (43,575MHz x 3) + (N x 12,5kHz x 2)

where N is 1 to 256.

For N = 1; VCO_{frequency} = (43,575MHz x 3) + (1 x 12,5kHz x 2) = 130,750MHz

For N = 256; VCO_{frequency} = (43,575MHz x 3) + (256 x 12,5kHz x 2) = 137,125MHz

Receive and Transmit frequency = VCO_{frequency} + 10,7MHz.

## B-200D Oscillator and PLL-Board Schematic

## B-200D Oscillator and PLL PCB

**B-200D PLL-board**Adjustment | Description | Frequency | |
---|

C2 | PLL Reference Oscillator | 12.800MHz | Frequency Counter to CP |

C38 | Mixer Oscillator | 43.575MHz | LoopMixing frequency |

**IC-240 PLL-board**Adjustment | Description | Frequency | |
---|

C2 | PLL Reference Oscillator | 6.400MHz | Frequency Counter to CP |

C38 | Mixer Oscillator | 43.900MHz | LoopMixing frequency |

**IC-22 PLL-board**Adjustment | Description | Frequency | |
---|

C2 | PLL Reference Oscillator | 7.680MHz | Frequency Counter to CP |

C38 | Mixer Oscillator | 44.563 333MHz | LoopMixing frequency |

## Main Board

## COMPONENTS

TC5080P Programmable DividerTC5081P PLL Phase-Locked-LoopTC5082P Oscillator and Reference DivideruPC577H Balanced RF AmplifierLM3028BH Balanced RF Amplifier2SC2094 Finale Transistor