Tektronix VITS100 Manual do Utilizador descarregar pdf (Página 2)

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes

that in all previously published material. Specifications and price change privileges reserved.

Printed in the U.S.A.

Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

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Instruction Manual 1
NTSC VITS Inserter 1
070-8333-02 1
WARRANTY 3
Service Assurance 5
Table of Contents 7
List of Figures 9
List of Tables 11
General Safety Summary 13
Service Safety Summary 15
Getting Started 17
Accessories and Options 20
Functional Check 21
Installation 23
Operating Basics 25
Rear Panel 28
Insertion Options 29
Passing Program Video 30
Auto VIRS 30
Inserting a Source ID 30
VITS Selection 31
Switch/Line Assignments 32
Switch Settings 33
Remote Control 34
Specifications 35
Waveform Diagrams 48
Figure 3–2: 7.5% Black 49
Figure 3–3: 50% Gray 49
Figure 3–4: FCC Color Bars 50
Figure 3–5: FCC Composite 50
Figure 3–6: Multiburst 51
Figure 3–7: Multipulse 51
Figure 3–8: NTC7 Combination 52
Figure 3–9: NTC7 Composite 52
Figure 3–10: Red Field 53
Figure 3–11: SIN X/X 53
Figure 3–12: VIRS 54
Figure 3–13: Cable Multiburst 54
Figure 3–14: Cable Sweep 55
Theory of Operation 59
Circuit Description 62
Signal and Switching 65
Source ID Generation 65
Power Supply 66
Performance Verification 71
Equipment Required 74
Verification Procedure 75
Select VITS 76
Line Input Range 78
Program Channel to 78
Test Signal Matching 78
Phase Match of 79
Inserted Test Signal to 79
Program Video Channel 79
Phase Match Bypass Path 81
Program Video Gain and 81
Line Tilt 81
Chrominance to 82
Luminance 82
Gain and Delay 82
Differential 83
Gain and Phase 83
Pulse-to-Bar Ratio 83
K-Factor 84
SCH Phase 85
Signal-to-Noise Ratio 85
Hum Rejection 85
Luminance Risetime 86
Chrominance Risetime 87
Genlock Checks 87
Return Loss and 90
Input/Output Impedance 90
Center Frequency 10 MHz 91
Reference Level 0 dB 91
Freq Span/Div 10 MHz 91
Frequency Response and 92
Crosstalk 92
Auto VIRS Insertion 94
Source ID 95
Adjustment Procedure 100
Preliminary Setup 101
Adjustment Procedures 102
Power Supply Adjustment 103
Genlock Adjustments 103
Gain Adjustments 105
Frequency Response 107
Adjustments 107
Frequency Range High 108
Markers On 108
Composite On 108
Amplitude Full 108
Sweep On 108
OUTPUTINPUT 109
Oscillator Adjustment 110
Maintenance 111
Preparation 114
Static Sensitive Components 114
Circuit Board Jumpers 116
Mode Selection Jumpers 117
Test Jumpers 117
Table 7–2: Test Jumpers 118
Cleaning and Inspection 119
Top Cover 120
Front Panel 120
Inserter Circuit Board 121
Oscillator Circuit Board 122
Removal/Replacement 122
Diagnostics 123
Replaceable Electrical Parts 127
Component Number 130
Subassembly Number 130
(optional) 130
Diagrams 157
   159
 159
Figure 9–2: A1A1 Oven Board 162
TEST SIGNAL MEMORY 163
TEST SIGNAL SELECT 2 165
P/O A1 INSERTER BOARD 167
CLAMP, AND SYNC 171
STRIPPER 171
VIDEO INPUT BUFFER 171
VIRS DETECT 171
A1A1 CRYSTAL OVEN BOARD 173
ANALOG OUTPUT 7 175
POWER SUPPLY 8 177
Replaceable Mechanical Parts 187
Abbreviations 190
Chassis Parts 190
Mfr. Code to Manufacturer 190
Cross Index 190
Figure 10–1: Exploded view 194
Appendix 195
Appendix A: Options 197
Option 1J 198
Factory Configuration 199
Option 1M 200
Option 1M Signals 201
Option 2 202
Figure A–5: Cable Multiburst 203
Figure A–6: Cable Sweep 203

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