Tait T860 Series II Manuals

Manuals and User Guides for Tait T860 Series II. We have 1 Tait T860 Series II manual available for free PDF download: Service Manual

Tait T860 Series II Service Manual

Tait T860 Series II Service Manual (264 pages)

220-285MHz

Brand: Tait | Category: Accessories | Size: 2.75 MB

Table of Contents

Part a Introduction to Servicing

5
- About this Manual
  3
- Table of Contents
  5
- 1 General
  
  7
- 2 Mechanical
  
  9
  - Torx Recess Head Screws
    9
  - Pozidriv & Philips Recess Head Screws
    10
  - Disassembly/Reassembly
    11
    
    Receivers/Exciters
    11
    
    Power Amplifiers
    11
  - Cover Screw Torques
    11
- 3 Component Replacement
  
  13
  - Leaded Components
    13
    
    Desoldering Iron Method
    13
    
    Component Cutting Method
    13
  - Surface Mount Devices
    14
  - Cased Mica Capacitors
    14
- 4 Software History
  
  15
  - Pgm800Win V1.0
    15
- T865 Receiver
  
  17
1 T865 General Information

19
- M860-00-Preliminary T865 General Information
  21
- T865 General Information
  
  22
- Introduction
  
  22
- Specifications
  
  22
  - General
    22
  - RF Section
    23
  - Audio Section
    24
    
    General
    24
    
    Ctcss
    25
    
    Mute Operation
    25
  - Test Standards
    26
  - European Telecommunication Standard (ETS)
    26
  - DTI CEPT Recommendation T
    27
  - Telecommunications Industry Association
    27
- Product Codes
  
  28
- Standard Product Range
  
  29
2 T865 Circuit Operation

31
- Introduction
  33
- T865 Circuit Operation
  33
- Receiver Front End
  34
- IF Circuitry
  35
- Mixer
  35
- Carrier Mute
  36
- Noise Mute (Squelch)
  36
- Audio Processor
  37
- Power Supply and Regulators
  38
- Microcontroller
  39
- Synthesised Local Oscillator
  40
- Vco
  41
3 T865 Initial Tuning & Adjustment

43
- Introduction
  
  45
  - M860-00-Preliminary T865 Initial Tuning & Adjustment
    45
- Channel Programming
  
  45
- Test Equipment Required
  
  46
- Short Tuning Procedure
  
  47
  - Introduction
    47
  - Synthesiser Alignment
    47
  - Front End Alignment
    47
  - Mute Adjustment
    48
  - Noise Mute
    48
  - Carrier Level Mute
    48
  - Line Amplifier Output
    48
  - RSSI (if Used)
    49
- Audio Processor Links
  
  50
  - General
    50
  - Audio Processor Linking Details for CTCSS
    51
- Synthesiser Alignment
  
  52
- Alignment of Receiver Front End and if
  
  52
- Gating Delay
  
  54
4 T865 Functional Testing

57
- Current Consumption
  59
- Sensitivity
  59
- Switching Range
  59
- Audio Distortion
  60
- Ultimate Signal-To-Noise Ratio
  60
- De-Emphasised Audio Frequency Response
  61
- Noise Mute (if Linked In)
  62
- Rssi
  62
- Carrier Level Mute (Carrier Mute Linked In)
  63
- Ctcss
  63
  - Decoder Operation
    63
  - Opening Sinad
    63
  - High Pass Filter
    64
5 T865 Fault Finding

65
- Front Panel LED Indicator
  
  67
- Visual Checks
  
  67
- Component Checks
  
  67
- DC Checks
  
  68
  - Power Rails
    68
  - VCO Locking
    68
  - Mute Operation
    68
- RF Checks
  
  69
  - VCO Frequency
    69
  - RF Sensitivity
    69
  - Oscillator Stability
    70
  - Tcxo
    70
  - Second if
    70
  - Demodulator Output
    70
  - IF Distortion
    71
- Pgm800Win Generated Errors
  
  72
- Fault Finding Charts
  
  73
  - Microcontroller
    73
  - Basic Checks
    73
  - Serial Communication
    74
  - CTCSS Decode
    75
  - Regulator
    76
  - Synthesiser
    77
  - Noise Mute
    80
  - Carrier Mute
    81
  - Receiver
    82
  - Audio
    83
- T867 Exciter
  
  111
1 T867 General Information

113
- Introduction
  
  115
- Specifications
  
  116
  - Introduction
    116
  - General
    116
  - RF Section
    117
  - Audio Processor
    118
  - Inputs
    118
  - Modulation Characteristics
    118
  - Ctcss
    119
  - Microcontroller
    119
  - Test Standards
    119
  - European Telecommunication Standard
    119
  - DTI CEPT Recommendation T
    120
- Product Codes
  
  121
- T867 Standard Product Range
  
  122
2 T867 Circuit Operation

123
- Introduction
  125
- Microcontroller
  126
- Synthesised Local Oscillator
  127
  - Two Point Modulation
    128
- Vco
  129
  - VCO Supply
    129
- Audio Processor
  130
  - General
    130
  - Audio Inputs
    130
  - Keying Inputs
    131
  - Compressor (Automatic Level Control (ALC))
    131
  - Outputs to Modulators
    131
- Power Supply & Regulator Circuits
  132
- Transmit Timers
  133
- T867 Exciter Drive Amplifier
  134
3 T867 Initial Tuning & Adjustment

135
- Introduction
  
  137
- Channel Programming
  
  137
- Test Equipment Required
  
  138
  - V Power Supply
    138
- Short Tuning Procedure
  
  139
  - Introduction
    139
  - Synthesiser Alignment
    139
  - Two Point Modulation Adjustment
    140
  - FM Deviation (Limiter) Adjustment
    140
  - Line-In Level Adjustment
    141
- Audio Processor Links
  
  142
  - Link Details
    142
  - Typical Options
    142
5 T867 Fault Finding

155
- Visual Checks
  
  157
- Front Panel LED Indicator
  
  157
- Component Checks
  
  157
- DC Checks
  
  158
  - Power Rails
    158
  - VCO Locking
    158
- RF Checks
  
  159
  - T867 Output Power
    159
  - Audio and Modulation
    159
- Pgm800Win Generated Errors
  
  160
- Fault Finding Charts
  
  161
  - Microcontroller
    161
  - Basic Checks
    161
  - Serial Communication
    162
  - CTCSS Encode
    163
  - Regulator
    164
  - Synthesiser
    165
  - T867 Exciter Drive Amplifier
    168
- T869 Power Amplifiers
  
  205
1 T869 General Information

207
- Introduction
  209
- Specifications
  210
  - Introduction
    210
  - General
    210
- Product Codes
  212
- Standard Product Range
  213
3 T869 Initial Adjustment

223
- Preliminary Checks
  225
- Test Equipment Required
  225
- Setting the Output Power
  226
- High Temperature Shutdown Power Level
  227
- Limiting the Maximum Output Power
  227
- Remote Forward Power Meter Calibration
  227
- Remote Reverse Power Meter Calibration
  227
- Setting Alarm Levels
  228
  - Forward Power
    228
  - Reverse Power
    228
- T860 VCO PCB Information
  255

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