Tektronix 1720 Manuals

Manuals and User Guides for Tektronix 1720. We have 2 Tektronix 1720 manuals available for free PDF download: Instruction Manual

Tektronix 1720 Instruction Manual (226 pages)

Vectorscope

Brand: Tektronix | Category: Measuring Instruments | Size: 2 MB

Table of Contents
5
General Safety Summary

12
Preface

14
Section 1 Introduction and Specification

17
- Accessories
  20
  - Standard Accessories
    20
  - Optional Accessories
    20
- Options
  20
  - CRT Options
    20
  - Power Cord Options
    20
- Safety Information
  21
- Specifications
  21
- Table 1-1: Signal Input
  22
- Table 1-2: Vector Mode
  22
- Table 1-3: XY Mode
  24
- Table 1-4: CRT Display
  24
- Table 1-5: Power Source
  24
- Table 1-6: Environmental Characteristics
  25
Section 2 Operating Instructions

27
Section 3 Installation

59
- Packaging
  61
- Electrical Installation
  61
  - Power Source
    61
  - Mains Frequency and Voltage Ranges
    61
  - Operating Options
    61
  - Y INPUT Connector
    61
  - Figure 3-1: Plug Jumper Locations
    62
  - Table 3-1: Internal Jumper Selection
    62
  - Auxiliary Connector
    63
- Mechanical Installation
  64
- Overview
  73
- Block Diagram
  74
  - Video Input
    74
  - Luminance Processing
    74
  - Microprocessor
    74
Section 4 Theory of Operation

75
- Gain Cell
  75
- Chrominance Processing
  75
- Figure 4-1: Simple Block Diagram of a 1720/1721 Vectorscope
  75
- Demodulators
  76
- Output Amplifiers
  76
- CRT Blanking
  76
- Circuit Descriptions
  77
- Diagram 1 Input and Deflection Amplifiers
  77
  - Video Input Amplifiers
    77
  - Gain Cell
    78
- Diagram 2 Subcarrier Regenerator
  78
  - Reference Switch
    79
  - Sync Separator
    80
  - Bowes Oscillator
    80
  - Back Porch Sample
    80
  - Loop Phase Detector and Amplifier
    80
  - Luminance and Chrominance Amplifiers
    80
  - Quadrature Phase Detector and Amplifier
    81
  - Burst Clamp
    81
  - Lock Detector and Bandwidth Switch
    81
  - Error Amplifier
    81
  - PAL Phasing
    82
  - Vcxo
    82
- Diagram 3 Demodulator
  83
- Diagram 4 Deflection Amplifier
  85
  - XY Input Amps
    86
  - Deflection Amplifiers
    86
  - Center Dot Comparators
    86
  - CRT Blanking
    86
- Diagram 5 Microprocessor
  87
  - Microprocessor
    87
  - Table 4-1: U613 Switching Control Outputs
    88
- Diagram 6 Control Circuit
  89
  - Z-Axis Control
    89
  - Trace Rotation
    90
  - Graticule Illumination
    90
  - Post Regulators
    90
- Diagram 7 Low Voltage Power Supply
  91
  - Output Filters
    92
  - Error Amplifier
    93
  - Feedback Transformer Driver and Peak Detector
    93
  - Output HV Shutdown
    93
- Diagram 8 High Voltage Power Supply
  94
  - Focus Amplifier
    95
  - Grid Drive Circuit
    95
  - Z-Axis Amplifier
    95
  - Section 5 Checks and Adjustments
    97
- Recommended Equipment List
  99
  - Electrical Instruments
    99
Section 5 Checks and Adjustments

100
Section 6 Maintenance

125
- Preventive Maintenance
  127
  - Cleaning
    127
  - Visual Inspection
    128
  - Table 6-1: Static Susceptibility
    128
  - Performance Checks and Readjustments
    129
- Troubleshooting
  130
  - Foldout Pages
    130
  - Parts Lists
    131
  - Major Assembly Interconnection
    131
- Specific Troubleshooting Procedures
  134
  - Power Supply
    134
  - Introduction
    134
  - Low Volts Supply
    135
  - High Volts Supply
    135
  - Table 6-2: Power Supply Fault Symptoms
    135
  - Table 6-3: Low Volts Supply Voltages
    135
  - Table 6-4: Control Circuit Test Points
    137
  - High Volts Supply
    138
  - Table 6-5: High Volts Supply Fault Symptoms
    138
  - Table 6-6: High Voltage Oscillator Test Points
    139
  - Serial Port and LED Driver Diagnostics
    140
- Corrective Maintenance
  141
- Mechanical Disassembly/Assembly
  142
  - Bezel Removal
    142
  - Graticule Light Removal and Replacement
    143
  - CRT Removal
    144
  - Replacement of the CRT
    144
  - Removing the Rear Panel
    145
  - Removing the Front Panel Circuit Board
    146
  - Removing the Main Board
    147
  - Removing the Power Supply Board
    148
- Repackaging
  149
  - Identification Tag
    149
  - Repackaging for Shipment
    149
  - Figure 6-8: Repackaging
    150
Section 7 Options

151
- Options
  153
  - Power Cord Options
    153
- Field Upgrade Kits
  153
  - Cabinets
    153
  - Plain Cabinet (1700F00)
    154
  - Carrying Case (1700F02)
    154
  - Side-By-Side Rack Adapter (1700F05)
    154
- Ordering
  154
  - Section 8 Replaceable Electrical Parts
    155
- Parts Ordering Information
  157
- Using the Replaceable Electrical Parts List
  157
Section 8 Replaceable Electrical Parts

163
Section 9 Diagrams/Circuit Board Illustrations

189
- Section 10 Replaceable Mechanical Parts
  213
Section 10 Replaceable Mechanical Parts

218

Tektronix 1720 Instruction Manual (138 pages)

VECTORSCOPE

Brand: Tektronix | Category: Test Equipment | Size: 10 MB

Change Information
2
Table of Contents
6
List of Tables
10
Operator's Safety Summary
13
1720-Series
13
Service Safety Summary
14
For Qualified Service Personnel Only
14
Section 1 Introduction
16
Standard Accessories
16
Optional Accessories
17
Field-Installable Upgrades
17
L * Power Cord Options
17
Safety Information
17
Specification
17
Supplemental Information
18
Section 2 Operating Instructions
24
Front-Panel Controls and Indicators
24
Input 2.0
24
Fig. 2-1 Control and Indicator Locations
25
Miscellaneous
26
Subminiature D-Type Connectors
28
Power Input
28
Miscellaneous
28
INPUT Switching
28
REF Switching
28
Line Select 2.10
28
Operator's Checkout Procedure
29
Fig. 2-4 1720-Series Typical Vector Display
30
Fig. 2-7 Connection for Using Black Burst Signal for External Reference
31
Fig. 2-8 1720-Series Test Circle Display
31
Measurement Applications
32
Color Measurements
32
Fig. 2-9 NTSC Standard Color Phase Vector Diagram
33
Fig. 2-12 1721 Graticule Showing the Fig. 2-13 Fine Detail of the Magenta Targets of the 1720 Graticule
34
Measurement of Color Bars
35
Fig.2-14
36
Fig. 2-15 1720 Graticule Showing Relationship between the Vector Targets and the
36
Differential Gain and Phase Measurements
37
Fig. 2-16 1721 Graticule Showing Relationship between the Vector Targets and the U and V Modulation Axes
37
Fig.2-18 | Makingdifferential Gain Measurements
38
Y Measurements
39
Making Stereo Audio Phase Measurements
39
Looking at Incidental Carrier Phase Modulation
39
Service Information
41
Packaging
41
Electrical Installation
41
Power Source 2.0.0.0
41
Mains Frequency and Voltage Ranges
41
Section 3 Installation
41
Operating Options
41
Auxiliary Control
42
YINPUT Connector
45
AUXILIARY Connector
45
Mechanical Installation
45
Rackmounting
45
Custom Installation 0.0.0.0
46
Fig. 3-6 1700F
46
DC Power Supply Field Upgrade
47
Fig. 3-7 a Typical Console Installation that Can be Used as a Guide When Customizing
47
Rear View
48
Side View
48
Bottom View
48
Section 4 Theory of Operation
49
Block Diagram
49
Fig. 4-1 Block Diagram of the 1720-Series
50
Videoinput
51
Chrominance Processing
51
Output Amplifiers
52
Circuit Descriptions
52
Xyinputamps
53
Deflection Amplifiers
53
Center Dot Comparators
53
Reference Switch
54
Reference AMPS
54
Sync Separator
54
} Fig. 4-2. Block Diagram of the Phase Lock Loop
54
Back Porchsample
55
Burstclamp
55
Lock Detector and Bandwidth Switch
55
Error Amplifier 2.00.0
55
PAL Phasing
56
VCXO and Phase Shifter
56
Low-Voltage Power Supply
59
Checks and Adjustments
62
Recommended Equipment List
62
Performance Check
64
Performance Check Procedure
65
Preliminary Setup
65
Fig. 5-2 Loop-Through Connection of Black Burst Signal to both EXT REF Andch-B
65
Ref Input
68
Fig. 5-5 Connections for Variable Gain Check
69
Fig. 5-6 Setting up the Return Loss Bridge
70
Fig. 5-8 Rear-Panel XY INPUT Connector Showing Inputs
71
Fig. 5-9 Audio Frequency XY Display
71
Main Board
73
Fig. 5-11 Starting Connections for the Adjustment Procedure
74
Section 6 Maintenance
77
Preventive Maintenance
77
Visual Inspection
77
Static-Sensitive Components
78
Troubleshooting
78
Parts Lists 2.20
80
Major Assembly Interconnection
81
General Troubleshooting Techniques
81
Serial Port and LED Driver Diagnostics
82
Obtaining Replacement Parts
82
Mechanical Disassembly/Assembly
83
CRT Removal
83
Removing the Rear Panel
85
Removing the Front Panel Circuit Board
85
Removing the Main Board
85
Removing the Power Supply Board
86
Front Panel Assembly
86
Identification Tag
86
Repackaging for Shipment
87
Section 7 Options
89
Cabinets
89
Plain Cabinet (1700F00)
89
Side-By-Side Rack Adapter (1700F05)
89
DC Power Supply
89
DC Power Supply Field Upgrade Kit (1700F10)
89
Battery Pack (BP1) 20.0
90
Section 8 Replaceable Electrical Parts
91
Parts Ordering Information
91
Cross Index-Mfr. Code Number to Manufacturer
91
Section 9 Diagrams and Circuit Board Illustrations
118
Replaceable Mechanical Parts
132
Indentation System
132
Fig.2-17
136

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Tektronix 1720 Manuals

Tektronix 1720 Instruction Manual (226 pages)

Table of Contents

General Safety Summary

Preface

Section 1 Introduction and Specification

Section 2 Operating Instructions

Service Safety Summary

Section 3 Installation

Section 4 Theory of Operation

Section 5 Checks and Adjustments

Section 6 Maintenance

Section 7 Options

Section 8 Replaceable Electrical Parts

Section 9 Diagrams/Circuit Board Illustrations

Section 10 Replaceable Mechanical Parts

Tektronix 1720 Instruction Manual (138 pages)

Table of Contents

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