Tait T830 25W Base Station Equipment Manuals

Manuals and User Guides for Tait T830 25W Base Station Equipment. We have 1 Tait T830 25W Base Station Equipment manual available for free PDF download: Service Manual

Tait T830 25W Service Manual

Tait T830 25W Service Manual (284 pages)

Base Station Equipment

Brand: Tait | Category: Accessories | Size: 3 MB

Table of Contents

Part a Introduction to Servicing

11
- Table of Contents
  11
- General
  13
- Caution: CMOS Devices
  13
- Caution: Aerial Load
  14
- Caution: Beryllium Oxide & Power Transistors
  14
- Mechanical
  15
- Pozidriv Recess Head Screws
  15
- Disassembly/Reassembly
  15
- Receivers/Exciters
  15
- Power Amplifiers
  15
- Cover Screw Torques
  15
- Component Cutting Method
  17
- Desoldering Iron Method
  17
- Leaded Components
  17
- Component Replacement
  17
- Surface Mount Devices
  18
- To Replace PA Transistors
  19
- To Remove the T838 PA PCB from the Heatsink
  21
- To Remove Cased Mica Capacitors
  23
- Software History
  25
- Baseprog V1/Pgm800 V2
  25
- Pgm800 V2.01
  25
- Pgm800 V2.21
  26
T835 General Information

31
- Introduction
  33
- General
  34
- Introduction
  34
- Specifications
  34
- RF Section
  35
- Audio Section
  36
- Versions
  37
T835 Circuit Operation

39
- Introduction
  41
- Receiver Front End
  42
- IF Circuitry
  43
- Mixer
  43
- Carrier Mute
  44
- Noise Mute (Squelch)
  44
- Audio Processor
  45
- Power Supply and Regulator
  46
- Synthesised Local Oscillator
  47
- Received Signal Strength Indicator (RSSI)
  48
T835 Initial Tuning & Adjustment

49
- Channel Programming
  51
- DIP Switch Codes for Channel Addresses
  51
- Audio Processor Links
  52
- General
  52
- Audio Processor Linking Details for CTCSS
  53
- Synthesiser Alignment
  54
- Test Equipment Set-Up
  54
- Alignment of Receiver Front End and if
  55
- Audio Processor
  56
- Line Amplifier Output
  56
- Monitor Amplifier Output (Speaker Output)
  56
- Noise Mute Adjustment
  56
- Carrier Level Mute
  57
- Rssi
  57
- PGM800 DIP Switch Codes
  58
- DIP Switch Codes for Channel Numbers
  60
T835 Functional Testing

61
- Current Consumption
  63
- Sensitivity
  63
- Switching Band (Multichannel Only)
  63
- Audio Distortion
  64
- Ultimate Signal-To-Noise Ratio
  64
- Emphasised Audio Frequency Response
  65
- Noise Mute (if Linked In)
  66
- Rssi
  66
- Carrier Level Mute (Carrier Mute Linked In)
  67
T835 Fault Finding

69
- Component Checks
  71
- Visual Checks
  71
- DC Checks
  72
- Mute Operation
  72
- Power Rails
  72
- VCO Locking
  72
- RF Checks
  73
- RF Sensitivity
  73
- VCO Frequency
  73
- Demodulator Output
  74
- IF Distortion
  74
- Oscillator Stability
  74
- Second if
  74
- Tcxo
  74
- Fault Finding Charts
  76
- Regulator
  76
- Synthesiser
  77
- Noise Mute
  79
- Carrier Mute
  80
- Receiver
  81
- Audio
  82
T836/837 General Information

109
- Introduction
  111
- General
  112
- Introduction
  112
- Specifications
  112
- RF Section
  113
- Audio Processor
  114
- Versions
  115
T836/837 Circuit Operation

117
- Introduction
  119
- Synthesiser
  120
- Two-Point Modulation
  122
- Vco
  122
- VCO Supply
  122
- Audio Inputs
  123
- Audio Processor
  123
- General
  123
- Compressor
  124
- Keying Inputs
  124
- Outputs to Modulators
  124
- Power Supply & Regulator Circuits
  125
- T836 Drive Amplifier & PA
  126
- T837 Exciter Drive Amplifier
  126
T836/837 Initial Tuning & Adjustment

127
- Channel Programming
  129
- DIP Switch Codes for Channel Addresses
  129
- Audio Processor Links
  130
- Link Details
  130
- Typical Options
  130
- Test Equipment Set-Up
  131
- Synthesiser Alignment
  132
- PA Alignment (T836 Only)
  133
- Thermal Shutdown (T836 Only)
  133
- Audio Processor
  134
- Limiter Adjustment
  134
- Modulator Adjustment
  134
- Two Point Modulation
  134
- Compressor
  135
- Compressor on Line Input Only
  135
- Line Level Without Compressor
  135
- Compressor on both Line & Microphone Inputs
  136
- Compressor on Microphone Input Only
  136
T836/837 Fault Finding

147
- Component Checks
  149
- Visual Checks
  149
- DC Checks
  150
- Power Rails
  150
- VCO Locking
  150
- RF Checks
  151
- T836 Drive Power
  151
- T836 PA Output Power
  151
- T837 Output Power
  151
- Audio and Modulation
  152
- Fault Finding Charts
  153
- Regulator
  153
- Synthesiser
  154
- T836 Drive Amplifier
  156
- T837 Exciter Drive Amplifier
  158
- Audio Processor
  159
T838 Circuit Operation

197
- Introduction
  199
- RF Circuitry
  200
- Control Circuitry
  201
- Power Control
  201
- Forward and Reverse Power Alarms
  202
- Forward and Reverse Power Metering
  202
- Thermal Protection
  202
T838 Initial Tuning & Adjustment

203
- Test Equipment Required
  205
- Optimising Intermodulation Performance
  206
- Preliminary Checks
  206
- RF Alignment
  207
- Remote Forward Power Meter Calibration
  208
- Remote Reverse Power Meter Calibration
  208
- Setting the Output Power
  208
- Forward Power
  209
- Reverse Power
  209
- Setting Alarm Levels
  209
- Temperature Shutdown
  210
T838 Fault Finding

211
- Component Checks
  213
- DC Checks
  213
- Visual Checks
  213
- General
  214
- PA Faults
  214
- RF Checks
  214
- Voltage Chart
  215
- Fault Finding Charts
  216
- Power Control
  217
Part F Installation

255
- Rack Mounting
  257
- T835/836/837 Installation
  257
- Rack Wiring
  258
- Power Supply
  259
- Rack Mounting
  261
- T838 Installation
  261
- Rack Wiring
  262
Part G System Configurations

265
- CTCSS Configuration
  267
- Flat or De-Emphasised Response
  267
- Mute Selection
  267
- Receiver Disable
  267
- T835 Link Selectable Features
  267
- Audio Processor
  269
- Line Transformer Inputs and Outputs
  269
- Opto Key
  269
- Relay Driver
  269
- T836/837 Optional Features
  269
- Local Microphone
  271
- Talk through Repeater
  271
- General
  273
- Line Controlled Base Without Talk through
  273
- Transmitter Tail Timer
  274

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