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2221A
Tektronix 2221A User Manual
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34
Table of Contents
Default Chapter
7
Table of Contents
7
Welcome
15
Product Description
15
Safety
17
Symbols and Terms
17
Specific Precautions
18
Start up
19
Installation & Power on
19
Figure 1-1: Installing the Power Cord
19
Initial Setup
20
Setting up the Display
20
Table 1-1: Basic Analog Display Setup
20
Adjusting Trace Rotation
21
Figure 1-2: Initial Setup Display
21
Checking the Probe Compensation
22
Figure 1-3: Checking Probe Compensation
22
Installing the Accessory Pouch
23
Figure 1-4: Installing the Accessory Pouch
23
Using the Power Cord Wrap
24
Figure 1-5: Using the Power Cord Wrap
24
Front Panel
25
Figure 2-1: Front Panel Control Sections
25
Figure 2-2: Front Panel View - Left Side
26
Figure 2-4: Power Switch
28
Power Switch
29
CRT Display
29
Figure 2-5: CRT Graticule
29
Display Mode
30
Figure 2-6: Analog (NON-STORE) Mode Display
30
Figure 2-7: Digital (STORE) Mode Display
31
CRT Display Controls
32
Figure 2-8: CRT Display Controls
32
Vertical Controls and Connections
34
Figure 2-10: Vertical Controls and Connections (Cont.)
36
Figure 2-11: Horizontal Controls
38
Horizontal Controls
38
Figure 2-12: Trigger Controls
40
Trigger Controls
40
Figure 2-13: Trigger Controls (Cont)
42
Cursor Controls
44
Figure 2-14: Cursor Controls
44
Acquisition Controls
45
Figure 2-15: Acquisition Controls
45
Figure 2-16: Save Reference Memory Buttons
46
Save Reference Memory Buttons
46
Figure 2-17: 1K Two-Channel Acquisition, Memory Location 1
47
Figure 2-18: 4K Two-Channel Acquisition, Memory Location 4K
47
Figure 2-19: Setup Buttons
49
Setup Menus
49
Figure 2-20: Setup Menu Example (Display)
50
Figure 2-21: Acquisition Menu
50
Acquisition Menu
50
Display Menu
52
Figure 2-22: Display Menu
52
Figure 2-23: Plot Menu
53
Plot Menu
53
Advanced Functions Menu
54
Figure 2-24; Advanced Functions Menu
54
Figure 2-25: Save Setup Menu
55
Displaying Signals
57
Applying Signals to the Vertical Inputs
57
Connecting Signals
57
Figure 3-1: Input Connection and Coupling Switch
57
Coupling Signals
58
Precharging the Signal Input
58
Building a Basic Display
59
Presetting the Controls
59
Selecting the Display Mode (STORE/NON-STORE)
59
Selecting the Trigger Mode
60
Selecting the Horizontal Mode and Scale
60
Selecting the Vertical Mode and Scale
61
Figure 3-2: Horizontal Display Controls
61
Setting the Display Intensity and Focus
62
Figure 3-3: Vertical Display Controls
62
Finding "Lost" Displays
63
Figure 3-4: CRT Display Controls
63
Digitizing Signals
64
Figure 3-5: Beam Find
64
Selecting the Acquisition Mode
65
Selecting the High-Speed Storage Mode
65
Selecting Siow-Speed Storage Modes
65
Viewing Slowly Occurring Events
66
Capturing Random Events
68
Accumulating Signal Peaks (ACCPEAK)
69
Detecting Signal Glitches
69
Figure 3-8: Accumulate Peak Mode Display
69
Averaging Signals
70
Sampling Signals
70
Figure 3-9: Peak Detect Mode Display
70
Figure 3-10: Average Mode Display
70
Clocking Acquisitions
71
Selecting the Acquisition Record Length (1K/4K)
71
Figure 3-11; Sample Mode Display
71
Figure 3-12: Acquisition Window Indicator
71
Compressing the Acquisition Record Length (4K Compress)
72
Figure3-13: 4K Acquisition, IK Window
72
Figure 3-14: Compressed 4K Acquisition
72
Positioning the Acquisition Record
73
Figure 3-15: Pretrigger Acquisition
73
Figure 3-16: Midtrigger Acquisition
73
Preventing Signal Aliases
74
Figure 3-17: Posttrigger Acquisition
74
Displaying Magnified Sweeps
75
Using the X10 Magnifier
75
Displaying Two Channels
76
Comparing Two Signals
76
Subtracting Signals or Signal Components {Common Mode Rejection)
76
Figure 3-19: Rejecting Common Mode Signal
77
Displaying X-Y Patterns
78
Figure 3-20: Selecting the X-Y Mode
78
Figure 3-21: X-Y Phase Relationships
79
Figure 3-22: X-Y Frequency Relationships
79
Figure 3-23: External Z-Axis Connection
80
Limiting Bandwidth
80
Modulating the Display Intensity
80
Triggering on Signals
81
Triggering on Repetitive Signals
81
Figure 3-24: Repetitive Sine Wave
81
Triggering on Low-Frequency Signals
82
Triggering on Random or Infrequent Events
82
Figure 3-25: Low-Frequency Signal in the STORE Mode
82
Triggering on Complex or Non-Repetitive Signals
83
Triggering on Line Frequency
83
Figure 3-26: Channel 1 Signal Triggered with Channel 2
83
Triggering with an External Signal
84
Triggering on TV Signals
84
Figure 3-27: Multi-Burst Signal Triggered in TV Line
84
Figure 3-28; Multi-Burst Signal Triggered in TV Field
85
Removing Unwanted Trigger Signal Components
85
Measuring Signals
87
Measuring with the Graticule
87
Measuring with STORE Mode Cursors
87
Figure 3-29: Measuring with the CRT Graticule
87
Positioning the Cursors
88
Measuring Voltage
88
Figure 3-30: Cursor Measurements
88
Measuring Voltages in Reference to G Round
89
Figure 3-31: Peak-To-Peak Measurement
89
Figure 3-32: DC Component of AC Signal
90
Figure 3-33: Ground-Referenced Voltage Measurement
90
Measuring Time with the Graticule or Cursors
91
Figure 3-34: Measuring DC Levels with Cursors
91
Measuring Frequency
92
Figure 3-35: Period Measurement
92
Measuring Rise Time and Fail Tim E
93
Figure 3-36: Cursor Frequency Measurement
93
Figure 3-37: Measuring Rise Time
93
Measuring Trigger Level
94
Measuring Phase Difference
94
Figure 3-39: Measuring Phase Difference
95
Figure 3-40: Phase Difference in X I0 Magnification
96
Saving Waveforms and Setups
97
Saving and Recalling Waveforms
97
Saving the Current Acquisition
97
Saving Waveforms in SAVE REF Memory
97
Recalling a Waveform from SAVE REF
98
Comparing Saved Waveforms
98
Saving and Recalling Setups
98
Saving a Setup
98
Figure 3-41: SAVE REF Memory Buttons
98
Recalling a Setup from Memory
99
Recalling a Power up State
99
Transmitting Waveforms
101
Communicating Via Interface Options
101
Figure 3-42: RS-232 Interface (Option 12)
101
Plotting or Printing a Waveform
102
Figure 3-44: Auxiliary Connection
102
Figure 3-45: Plot Menu
103
Appendix A: Options and Accessories
105
Options
105
Table A-1: International Power Cords
105
Table A-2: Standard Accessories
106
Standard Accessories
107
Other Accessories
107
Table A-3: Optional Accessories
107
Appendix B: Specification
109
General Product Description
109
Options and Accessories
111
Performance Conditions
111
Characteristic Tables
112
Table A-4: Electrical Characteristics
112
Figure A-1; Maximum Input Voltage Versus Frequency Derating Curve
125
Table A-5: Environmental Characteristics
126
Table A-6: Physical Characteristics
127
Figure A-2: Physical Dimensions of the 2221A Digital Storage Oscilloscope
128
Appendix C: Performance Verification
129
General Information
129
Purpose
129
Performance Check Interval
129
Structure
129
Limits and Tolerances
129
Test Equipment Required
130
Table A-7: Test Equipment Required
130
Procedures
132
Initial Setup Procedure
132
Vertical System Checks
132
Table A-8: Deflection Accuracy Limits
134
Table A-9: Storage Deflection Accuracy
135
Table A-10: Settings for Bandwidth Checks
137
Horizontal System Checks
141
Table A-11: Settings for Timing Accuracy Checks
143
Trigger System Checks
147
Table A-12: Switch Combinations for Triggering Checks
148
External Z-Axis, Probe Adjust, External Clock, and X-Y Plotter Checks
153
Appendix D: Storage Modes
157
Table A-13: Storage Modes
157
Glossary
159
Index
165
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Tektronix 2221A Specifications
General
Brand
Tektronix
Model
2221A
Category
Test Equipment
Language
English
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