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T525
Tait T525 Manuals
Manuals and User Guides for Tait T525. We have
1
Tait T525 manual available for free PDF download: Manual
Tait T525 Manual (79 pages)
Brand:
Tait
| Category:
Two-Way Radio
| Size: 3 MB
Table of Contents
Contents
3
List of Illustrations
5
T525 General Information
7
Specifications
8
Frequency Reference
10
Operating Instructions
11
Front Panel Layout
11
Circuit Operation
13
Synthesizer
13
Receiver
13
Squelch
13
Transmitter
14
Power Supply
14
RF Stages
14
Audio Processor
14
Continuous Supplies
15
Frequency Information
15
Ancillary Equipment
17
Installation
21
Vehicle Installation
21
Servicing
23
Notes
23
Cleaning
23
Aerial Loading
23
Disassembly
24
To Gain Access to the Component Side of the PCB
24
To Gain Access to the Track Side of the PCB
24
To Remove the Front Panel
24
Vco Can
25
Fit the Top Cover
25
Fit the Bottom Cover
25
Repair
26
Component Checks
26
Leaded Component Replacement
26
Chip Component Removal/Replacement
26
Component Removal from PTH Pcb's
27
Desoldering Iron Method
27
Crystal Filter Replacement
28
Component Cutting Method
28
PA - Special Instructions
28
To Replace the PA Transistors
28
Setting up
29
Test Equipment Required
29
Tuning Hints
29
Channel Programming
30
Reference Frequency Selection
30
Programming
30
VCO Alignment
32
Single Channel Operation
32
Dual Channel Operation
33
Reference Frequency Adjustment
33
Transmitter Adjustments
33
Alignment
33
Modulation Adjustment
34
Receiver Alignment
34
Fault Finding
35
To Check the Squelch Operation
35
To Check the Squelch Ratio
35
To Check the Audio Output Level
36
To Check the Signal Sensitivity
36
To Check the Signal + Noise to Noise Ratio
36
Transmitter Performance Tests
37
To Check the Ultimate Signal to Noise Ratio
37
VCO Injection to the Mixer
37
To Check the Limiter Circuit
37
To Check the Audio ALC Operation
38
To Check the Gain of the Audio Processor
38
Modulation Characteristics
38
To Check the above Limiting Response
38
To Check the below Limiting Response
39
To Check the RF Power Control Circuit
39
To Check the Transmission Timer
39
To Check the VCO Control Range
39
Parts List
41
Introduction
41
Index
42
Crystal Filter Chart
43
Narrow Band
43
Wide Band
43
Suggested Test Equipment Set-Up
63
T525 Tuning Points
65
PCB Layout - Top Side
67
PCB Layout - Bottom Side
68
LED & Crystal Heater PCB Layout
69
Diode Matrix Circuit Diagram
77
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