Name: Tektronix 2221A
Brand: Tektronix
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User Manual

Tektronix

2221A

Digital Storage Oscilloscope

070-8156-02

Default Chapter7
- Table of Contents7
Welcome15
Product Description15
Safety17
- Symbols and Terms17
- Specific Precautions18
Start up19
- Installation & Power on19
  - Figure 1-1: Installing the Power Cord19
- Initial Setup20
- Installing the Accessory Pouch23
  - Figure 1-4: Installing the Accessory Pouch23
- Using the Power Cord Wrap24
  - Figure 1-5: Using the Power Cord Wrap24
Front Panel25
- Figure 2-1: Front Panel Control Sections25
- Figure 2-2: Front Panel View - Left Side26
- Figure 2-4: Power Switch28
- Power Switch29
- CRT Display29
  - Figure 2-5: CRT Graticule29
- Display Mode30
  - Figure 2-6: Analog (NON-STORE) Mode Display30
  - Figure 2-7: Digital (STORE) Mode Display31
- CRT Display Controls32
  - Figure 2-8: CRT Display Controls32
- Vertical Controls and Connections34
  - Figure 2-10: Vertical Controls and Connections (Cont.)36
  - Figure 2-11: Horizontal Controls38
- Horizontal Controls38
  - Figure 2-12: Trigger Controls40
- Trigger Controls40
  - Figure 2-13: Trigger Controls (Cont)42
- Cursor Controls44
  - Figure 2-14: Cursor Controls44
- Acquisition Controls45
  - Figure 2-15: Acquisition Controls45
  - Figure 2-16: Save Reference Memory Buttons46
- Save Reference Memory Buttons46
Setup Menus49
- Figure 2-20: Setup Menu Example (Display)50
- Figure 2-21: Acquisition Menu50
- Acquisition Menu50
- Display Menu52
  - Figure 2-22: Display Menu52
  - Figure 2-23: Plot Menu53
- Plot Menu53
- Advanced Functions Menu54
  - Figure 2-24; Advanced Functions Menu54
  - Figure 2-25: Save Setup Menu55
Displaying Signals57
Applying Signals to the Vertical Inputs57
- Connecting Signals57
- Figure 3-1: Input Connection and Coupling Switch57
- Coupling Signals58
- Precharging the Signal Input58
Building a Basic Display59
- Presetting the Controls59
- Selecting the Display Mode (STORE/NON-STORE)59
- Selecting the Trigger Mode60
- Selecting the Horizontal Mode and Scale60
- Selecting the Vertical Mode and Scale61
- Figure 3-2: Horizontal Display Controls61
- Setting the Display Intensity and Focus62
- Figure 3-3: Vertical Display Controls62
- Finding "Lost" Displays63
- Figure 3-4: CRT Display Controls63
Digitizing Signals64
- Figure 3-5: Beam Find64
Displaying Magnified Sweeps75
- Using the X10 Magnifier75
Displaying Two Channels76
- Comparing Two Signals76
- Subtracting Signals or Signal Components {Common Mode Rejection)76
- Figure 3-19: Rejecting Common Mode Signal77
Displaying X-Y Patterns78
- Figure 3-20: Selecting the X-Y Mode78
- Figure 3-21: X-Y Phase Relationships79
- Figure 3-22: X-Y Frequency Relationships79
- Figure 3-23: External Z-Axis Connection80
Limiting Bandwidth80
Modulating the Display Intensity80
Triggering on Signals81
- Triggering on Repetitive Signals81
- Figure 3-24: Repetitive Sine Wave81
- Triggering on Low-Frequency Signals82
- Triggering on Random or Infrequent Events82
- Figure 3-25: Low-Frequency Signal in the STORE Mode82
- Triggering on Complex or Non-Repetitive Signals83
- Triggering on Line Frequency83
- Figure 3-26: Channel 1 Signal Triggered with Channel 283
- Triggering with an External Signal84
- Triggering on TV Signals84
Measuring Signals87
- Measuring with the Graticule87
- Measuring with STORE Mode Cursors87
  - Figure 3-29: Measuring with the CRT Graticule87
Saving Waveforms and Setups97
- Saving and Recalling Waveforms97
- Saving and Recalling Setups98
Transmitting Waveforms101
- Communicating Via Interface Options101
  - Figure 3-42: RS-232 Interface (Option 12)101
- Plotting or Printing a Waveform102
  - Figure 3-44: Auxiliary Connection102
  - Figure 3-45: Plot Menu103
Appendix A: Options and Accessories105
- Options105
  - Table A-1: International Power Cords105
  - Table A-2: Standard Accessories106
- Standard Accessories107
- Other Accessories107
  - Table A-3: Optional Accessories107
Appendix B: Specification109
- General Product Description109
- Options and Accessories111
- Performance Conditions111
- Characteristic Tables112
Appendix C: Performance Verification129
- General Information129
- Test Equipment Required130
  - Table A-7: Test Equipment Required130
- Procedures132
Appendix D: Storage Modes157
- Table A-13: Storage Modes157
Glossary159
Index165

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Tektronix 2221A Specifications

General

Type	Oscilloscope
Bandwidth	100 MHz
Channels	2
Vertical Sensitivity	2 mV/div to 5 V/div
Trigger Modes	Auto, Normal, Single
Display	CRT
Input Impedance	1 MΩ
Maximum Input Voltage	400 V (DC + peak AC)
Weight	7.7 kg

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