Codan X-2 Manuals

Manuals and User Guides for Codan X-2. We have 1 Codan X-2 manual available for free PDF download: Service Manual

Codan X-2 Service Manual

Codan X-2 Service Manual (100 pages)

HF SSB

Brand: Codan | Category: Transceiver | Size: 6 MB

Table of Contents

Table of Contents
3
Publication No:
8
1 Introduction

9
- Purpose
  9
- How this Manual Is Organised
  9
- Conventions
  10
- Related Documents
  10
- Overview
  10
- Australia
  10
- Specifications
  11
  - General Specifications
    11
  - Receiver Specifications
    13
  - Transmitter Specifications
    14
2 Brief Description

15
- General
  15
- Control and Switching
  16
- Synthesiser
  16
- Receive Path
  17
- Transmit Path
  18
3 Operating Instructions

19
- Audible Warning Tones
  20
4 Technical Description

21
- Control and Supply Voltages
  22
  - Power
    22
  - Supply Voltages
    22
  - Receive/Transmit Switching
    23
- Receiver
  24
  - Input Filters
    24
  - First Mixer
    24
  - 45 Mhz Roofing Filter
    24
  - Second Mixer
    24
  - Noise Limiter
    25
  - 455 Khz Filter and if Amplifier
    25
  - Automatic Gain Control
    26
  - Mute
    27
  - Volume Control and Audio Amplifier
    28
- Transmitter Exciter
  28
  - Microphone Compressor
    28
  - Modulator
    29
  - 455 Khz Filter and First Mixer
    29
  - 45 Mhz Roofing Filter
    29
  - Second Mixer and Exciter Output Filter
    29
- Local Oscillators
  30
  - Introduction
    30
  - VCO1 and PLL
    30
  - VCO2 and PLL
    31
  - 455 Khz Local Oscillator
    32
  - Clarifier
    32
- Micro and Peripherals
  33
  - Microcontroller
    33
  - I 2 C Bus
    33
  - PA Control Bus
    33
  - Front Panel Controls
    34
  - Tune
    35
  - Tone Generation
    35
  - A/D Inputs
    35
  - Microcontroller Reset
    36
- PA and Filters
  36
  - Gain Control Stage
    37
  - Predriver Stages
    37
  - Driver Stage
    37
  - Output Stage and Bias Regulator
    38
  - Output Filters and Antenna 1 and 2 Select
    38
  - ALC Control
    38
5 Maintenance

41
- Introduction
  41
- General
  41
  - CMOS Devices
    41
  - Circuit Boards
    42
  - Transmitter Precautions
    43
  - Probe Precautions
    44
- Fault Diagnosis
  44
  - General
    44
  - Voltage Measurements
    45
  - No Reception
    46
  - Transmitter Failure
    47
  - PA Failure
    48
- Dismantling and Assembling
  48
  - General
    48
  - Top and Bottom Covers
    49
  - Rx/Exciter & Control PCB
    49
  - Front Panel PCB
    49
  - PA and Filter Assembly
    50
  - Replacement of PA Transistors
    51
6 Channel Additions

53
7 Adjustments

55
- Introduction
  55
- Test Equipment Required
  55
- Voltage Regulators
  55
- Crystal Oven
  56
- Test Mode
  56
- USB/LSB Test Frequencies and Functions
  57
  - VCO Checks and Adjustments
    58
    
    VCO1 Check
    58
    
    VCO2 Check
    58
    
    VCO2 Adjust
    59
  - 45 Mhz Filter Alignment
    59
    
    Alignment - Method 1
    60
    
    Alignment - Method 2
    61
  - 455 Khz if and N/L Alignment
    61
  - Frequency Adjustment
    62
    
    Frequency Adjust USB
    62
    
    Frequency Adjust LSB
    63
  - Mute Adjustment
    63
  - PA Adjustments
    64
    
    Driver Bias
    64
    
    PA Bias
    64
    
    Output Power
    65
    
    Intermodulation
    66
  - Receiver Performance Checks
    67
    
    Sensitivity and S+N/N Ratio
    67
    
    AGC Check
    67
    
    Audio Output
    67
    
    Selectivity (USB Operation)
    67
    
    Clarifier Operation
    68
    
    Noise Limiter Operation
    68
  - Transmitter Performance Checks
    68
    
    Frequency Check
    68
    
    Alc
    69
    
    Power Output and Intermodulation
    69
    
    Emergency Call
    69
8 Appendices

71
- Appendix A: Connectors
  
  71
  - Microphone
    71
  - External Loudspeaker
    71
  - Antenna Control
    72
  - Programming Cable
    72
  - Cloning Cable
    72
  - A.3 Antenna Control
    72
- Appendix B: Parts Lists
  
  73
  - General Information
    73
  - Ordering Information
    74
  - Component Substitution
    74
  - Parts Lists
    74
  - B.2 Ordering Information
    74
- Appendix C: Engineering Drawings
  
  75
- Appendix D: Glossary of Terms
  
  77
  - Abbreviations
    77
    
    D.2 Abbreviations of Units
    78
    
    D.3 Abbreviations of Unit Multiples
    79

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