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453
Tektronix 453 User Manual
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Electrical
Parts
List-Type
453/R453
B
SWEEP
Circuit
Board
Assembly
(cont)
Tektronix
Serial/Model
No.
Ckt.
No.
Part
No.
Eff
Disc
Resistors
(cont)
R809
321-0231-00
2.49kn
1/s
w
Pree
1%
R812
321-0260-00
4.99
kn
1/s
w
Pree
1%
R814
304-01
03-00
10
kn
lW
R821
315-0510-00
51
n
114
w
5%
R822
321-0263-00
5.36
kn
1
/a
W
Pree
1%
R824
304-01
03-00
lOkn
lW
R826
321-0231-00
2.49
kn
1/a
W
Pree
1%
R828
315-0272-00
2.7
kn
1h.
w
5%
R831
315-0153-00
15
kn
1
/4
w
5%
R833
323-0305-00
14.7
kn
1/2
w
Pree
1%
R834
322-0216-00
1.74
kn
%
w
Pree
1%
R835
311-0480-00
500
n,
Var
R836
321-0210-00
1.5
kn
1/s
w
Pree
1%
R841
315-0153-00
15
kn
1
h.W
5%
R843
323-0305-00
14.7
kn
%W
Pree
1%
R844
322-0216-00
1.74
kn
1
/4W
Pree
1%
R845
311-0433-00
lOOn,
Var
R846
321-0105-00
121
n
1/s
w
Pree
1%
R854
315-0103-00
JO
kn
1
/4
w
5%
R855
311-0541-00
20
kn,
Var
R856
315-0103-00
lo
kn
%W
5%
R862
315-0473-00
20000
30449
47
kn
1h.
w
5%
R862
315-0273-00
30450
27kn
1/4
w.
5%
R863
316-0122
-00
1.2
kn
1
/4
w
R864
315-0681-00
680n
1h.
w
5%
R872
315-0473-00
20000
30449
47kn
1
/4W
5%
R872
315-0273-00
30450
27kn
1f4
w
5%
R873
316-0122-00
1.2
kn
1
/4
w
R874
315-068
l
-00
680n
1f4
w
5%
R882
323-0322-00
22.i
kn
1
/2W
Pree
1%
R892
323-0322-00
22.1
kn
%W
Pree
1%
Transformer
T686
*
120-0361
-00
Toroid,
9
turns
bifilar
VERTICAL
PREAMP
Circuit
Board
Assembly
*670-0419-04
20000
32291
Complete
Board
*670-0419-06
32292
44711
Complete
Board
*670-0419-07
44712
Complete
Board
Capacitors
T
oleranee
+20%
unless
otherwise
indicated.
C17
281-0064-00
0.25-1.5
pF,
Var
Tub.
C18
283-0077-00
330pF
Cer
soov
5%
C20
281-0603-00
39
pF
Cer
500V
5%
C23
283-0081-00
0.1
µF
Cer
25V
+80%-20%
C24
290-0177-00
1
µF
Elect.
sov
CD
7-29
178
180
Table of Contents
Table of Contents
4
Section 1 Type 453/R453
7
Electrical
8
Vertical Deflection System
8
Introduction
8
Triggering <A and B Sweep
9
Horizontal Deflection System
9
A and B Sweep Generator
9
Sweep Magnifier
10
Sweep Delay
10
External Horizontal Amplifier
10
Calibrator
10
Z Axis Input
11
Output Signals
11
Power Supply
11
Cathode-Ray Tube (CRT)
11
Environmental
11
Mechanical
12
Standard Accessories
12
General
14
Front Cover and Handle
14
Operating Voltage
14
Section Operating Instructions
14
Controls and Connectors
15
Operating Temperature
15
Rackmounting
15
Front-, Side- and Rear-Panel Controls and Connectors
16
First-Time Operation
19
Setup Information
19
CRT Controls
19
Vertical Controls
19
Triggering
20
Normal and Magnified Sweep
20
Delayed Sweep
20
Control Setup Chart
21
General Operating Information
21
Intensity Control
21
Astigmatism Adjustment
21
Graticule
23
Trace Alignment Adjustment
23
Light Filter
23
Trace Finder
24
Vertical Channel Selection
24
Vertical Gain Adjustment
24
Step Attenuator Balance
24
Signal Connections
24
Loading Effect of the Type 453
24
Coaxial Cable Considerations
25
Input Coupling
25
Operation
25
Output and Cascaded Operation
26
Deflection Factor
26
Precautions
26
Algebraic Addition
26
Trigger Source
27
Trigger Coupling
27
Trigger Slope
27
Trigger Level
29
High-Frequency Stability
29
A Sweep Triggered Light
29
A Sweep Mode
29
Selecting Sweep Rate
29
Sweep Magnification
30
Delayed Sweep ( B)
30
External Horizontal Deflection
32
A and B Gate
33
Intensity Modulation
33
Calibrator
33
Basic Applications
33
General
33
Measurements-AC
33
Instantaneous Voltage
34
Measurements-DC
34
Voltage Comparison Measurements
34
Time-Duration Measurements
35
Frequency Measurements
35
Risetime Measurements
36
Time-Difference Measurements
36
Delayed Sweep Time Measurements
37
Delayed Sweep Magnification
38
Displaying Complex Signals Using Delayed Sweep
39
Pulse Jitter Measurements
39
Delayed Trigger Generator
40
Normal Trigger Generator
40
Multi-Trace Phase Difference
41
High Resolution Phase Measurements
41
X-Y Phase Measuremnts
41
Common-Mode Rejection
43
Block Diagram
44
Section 3 Circuit Description
44
Introduction
44
General
44
Circuit Operation
46
Input Attenuator
46
General
46
Channel 1 Vertical Preamp
46
Input Coupling
46
Input Stage
47
Feedback Amplifier
47
Paraphase Amplifier
47
Channel 1 Trigger Pickoff
47
Vertical Switching
49
Diode Gates
49
Channel 2 Vertical Preamp
49
General
49
Feedback Amplifier
49
Paraphase Amplifier
49
Switching Multivibrator
50
Vertical Output Amplifier
51
Delay-Line Driver
51
Normal Trigger Pickoff Network
51
Delay Line
51
General
51
Phase Equalizer Network
51
Trigger Preamp
52
Output Amplifier
52
Input Circuitry
52
General
52
Amplifier Circuitry
53
A Trigger Generator
53
General
53
Trigger Source
54
Trigger Coupling
54
Slope Comparator
55
Trigger TD
55
Pulse Amplifier
55
Input Stage
55
Auto Pulse Amplifier
56
Auto Multivibrator
56
A Sweep Generator
57
General
57
Normal Trigger Mode Operation
58
Sweep Gate
58
Output Signal Amplifier
58
Disconnect Diode
59
Sawtooth Sweep Generator
59
Sweep Reset Emitter Follower
59
Sweep Start Amplifier
59
Auto Trigger Mode Operation
60
Single Sweep Operation
60
B Trigger Generator
60
General
60
Input Stage
61
Pulse Amplifier
61
B Sweep Generator
61
Delay-Pickoff Comparator
62
General
62
Output Signal Amplifier
62
Horizontal Amplifier
63
Delay Multivibrator
63
Sweep Reset Multivibrator
63
B Ends a Pulse Amplifier
63
General
63
Input Amplifiers
64
Paraphase Amplifier
64
Z Axis Amplifier
65
Input Amplifier
65
General
65
CRT Circuit
66
High-Voltage Oscillator
66
Output Amplifier
66
General
66
High-Voltage Regulator
67
High-Voltage Rectifiers and Output
67
Low-Voltage Power Supply
68
CRT Control Circuits
68
External Z Axis Input
68
12-Volt Supply
68
General
68
150-Volt Unregulated Supply
70
12-Volt Supply
70
Volt RMS AC Source
71
Voltage Distribution
71
Calibrator
71
General
71
Oscillator
71
Output Amplifier
71
Output Divider
71
Section 4 Maintenance
72
Introduction
72
General
72
Cleaning
72
Visual Inspection
73
Transistor Checks
73
Troubleshooting Aids
73
Lubrication
73
Recalibration
73
Introduction
73
Troubleshooting Equipment
75
Troubleshooting Techniques
75
Power Supply Tolerance
76
Cover Removal
72
Preventative Maintenance
72
Corrective Maintenance
79
Obtaining Replacement Parts
79
Soldering Techniques
79
General
79
Component Replacement
80
Removing the Rear Panel
80
Swing-Out Chassis
80
Ceramic Terminal Strip Replacement
80
Vertical Preamp Unit Removal
81
Recalibration after Repair
83
Instrument Repackaging
83
Vertical Output Amplifier Circuit Board
86
Performance Check/Calibration
96
Introduction
96
Test Equipment Required
96
Type 453/R453
96
Index
96
General
96
Short-Form Calibration Procedure
97
Preliminary Procedure
101
Performance Check Only
103
Adjust - 12-Volt Power Supply
103
Adiust High-Voltage Supply and Check Regulation
104
Adjust CRT Grid Bias
105
Check Low Voltage
105
Check/Adjust Trace Alignment
105
Adjust Astigmatism
105
Check/Adjust y Axis Alignment
106
Check/Adjust CRT Geometry
106
Check/Adjust Channel 1 and 2 Step Attenuator Balance
106
Check/Adjust Channel 1 and 2 Position Center
107
Partial Procedure
109
Check Low-Frequency Vertical Linearity
111
Check Trace Shift Due to Input Gate Current
112
Check Alternate Operation
112
Check/Adjust High-Frequency Compensation
114
Selected Components
114
Check Common - Mode Rejection Ratio
118
Check Attenuator Isolation Ratio
118
Check a and B Internal Triggering Operation
120
Check a and B External Triggering Operation
120
Control Settings
125
Check Auto Recovery Time and Operation
125
Check/Adjust Sweep Start and a Sweep Calibration
125
Check/Adjust Normal Gain
126
Check/Adjust Magnified Gain
126
Check/Adjust Magnifier Register
127
Check/Adjust B Sweep Calibration
127
Check B Sweep Length
128
Check a Sweep Length
128
Check a Variable Control Range
129
Check B Variable Control Range
129
Check/Adjust One-Microsecond Timing
129
Check/Adjust High-Speed Linearity
130
Check a Sweep Timing Accuracy
130
Check a Magnified Sweep Accuracy
131
Check B Sweep Timing Accuracy
131
Check B Magnified Sweep Accuracy
131
Check Delay-Time Accuracy
131
Check Delay-Time Multiplier Incremental Linearity
132
Check Delay-Time Litter
133
Check/Adjust External Horizontal Gain
133
Check External Horizontal Operation
134
Check X-Y Phasing
134
Check X Bandwidth in External Horizontal Mode
134
Check Trace Finder Operation
135
Check Chopped Operation
135
Check/Adjust Calibrator Repetition Rate
135
Check Calibrator Duty Cycle
136
Check Calibrator Risetime
136
Check Current through Probe Loop
137
Check/Adjust Z Axis Compensation
137
Check External Z Axis Operation
137
Check B Gate Output Signa
138
Section 6 Rackmounting
140
Introduction
140
Rack Dimensions
140
Slide-Out Tracks
140
Mounting Procedure
140
Alternative Rear Mounting Methods
141
Removing or Installing the Instrument
141
Slide-Out Track Lubrication
141
Dimensional Drawing
148
Rear View
148
Index of Electrical Parts List
150
Electrical Parts List
151
Chassis
152
Z AXIS Circuit Board Assembly
162
LOW VOLTAGE REGULATOR Circuit Board Assembly
164
VERT OUTPUT AMP Circuit Board Assembly
166
A SWEEP Circuit Board Assembly
168
B SWEEP Circuit Board Assembly
174
VERTICAL PREAMP Circuit Board Assembly
179
Parts List Abbreviations
187
Diagrams and Mechanical Parts Illustrations
189
Voltage and Waveform
190
Test Conditions
190
Figure and Index Numbers
217
Indentation System
217
Index of Mechanical Parts Illustrations
218
Mechanical Parts List
219
Calibration Test Equipment Chart
245
Comparison of Main Characteristics
245
4
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Tektronix 453 Specifications
General
Brand
Tektronix
Model
453
Category
Test Equipment
Language
English
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