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Tektronix 11801C User Manual

Tektronix 11801C User Manual (440 pages)

Digital Sampling Oscilloscope

Brand: Tektronix | Category: Test Equipment | Size: 9.18 MB

Table of Contents

Table of Contents

9
- About this Manual
  7
- Related Documentation
  7
- Notes on Previous Products
  7
- Contacting Tektronix
  8
  - Table of Contents
    9
List of Figures

17
List of Tables

23
- Safety Summary
  25
- Getting Started
  28
- Description of Sampling
  29
- Electrical Connections
  29
- Figure 1 1: Front Panel Connectors
  31
- Figure 1 2: Rear Panel Power Connectors and Switches
  32
- Figure 1 3: Rear Panel Printer and Data Connectors
  32
- Installation
  33
- Operating Environment
  34
- At a Glance
  35
- Front Panel and Sampling Heads
  35
- Rear Panel
  36
- Display and Touch Panel
  37
- Icons
  38
- Knobs, Knob Menu, and Keypad Menu
  39
- Major Menu Buttons
  40
- Waveform Major Menu
  42
- Trigger Major Menu
  45
- Measure Major Menu
  46
- Display Modes Major Menu
  47
- Store/Recall Major Menu
  48
- Utility1 Major Menu
  50
- Enhanced Accuracy Major Menu
  52
- Utility2 Major Menu
  54
- Overview
  55
- Example 1: Displaying a Trace
  57
- Major Menu Buttons
  57
- Figure 2 1: Utility1 Major Menu
  58
- Figure 2 2: Initialize Selector in Utility1 Major Menu
  59
- Menu Selectors
  59
- The Touch Panel
  59
- Connecting Cables
  60
- Figure 2 3: Cable from the CALIBRATOR Output to a Sampling
  60
- Figure 2 4: Sampling Head Control Panel (SD 24 Shown)
  61
- Figure 2 5: the Trigger Major Menu and Source Pop up Menu
  62
- Pop up Menus
  62
- Autoset
  63
- Figure 2 6: AUTOSET Button Location
  63
- Autoset Options
  64
- Figure 2 7: the Instrument Options Pop up Menu
  64
- Figure 2 8: the Calibrator Signal after Pressing AUTOSET in
  65
- Figure 2 9: the Knobs and the Knob Menu
  66
- The Knobs
  66
- Icons
  67
- Figure 2 10: Icons
  68
- Keypad Pop up Menu and Knob Resolution
  69
- Figure 2 11: the Knob Menu and Keypad Pop up Menu
  70
- Major Menu Knob Assignments
  71
- Figure 2 12: Connections for Example 2
  73
- Example 2: Managing Multiple Traces
  74
- Figure 2 13: the Acquired Calibrator Signal
  74
- Adding Another Trace
  75
- Figure 2 14: Graticule with Two Traces
  75
- Figure 2 15: the Waveform Major Menu with the Knob Menu
  76
- Selecting Traces by Touch
  76
- Figure 2 16: the Trace Status Menu
  77
- Selecting Traces Using the Trace Status Menu
  77
- Labeling Traces
  78
- Figure 2 17: the Labeling Pop up Menu
  79
- Displaying Dual Graticules
  80
- Figure 2 18: the Graticules Pop up Menu
  80
- Figure 2 19: a Dual Graticule Display
  81
- Removing Traces
  82
- Figure 2 20: Connections for Example 3
  83
- Example 3: Defining Complex Traces
  84
- Trace Expressions
  85
- Figure 2 21: the Deftra Pop up Menu
  86
- Vertical Adjustment of Complex Traces
  87
- Figure 2 22: Complex Trace Aberration Caused by off Graticule
  88
- Figure 2 23: the Chan Sel Selector in the Knob Menu
  88
- High Precision Traces
  90
- Figure 2 24: a Window Trace Display
  91
- Windows
  91
- Figure 2 25: the Chan Sel Selector in the Knob Menu
  92
- Horizontal Reference Point
  93
- Figure 2 26: Connections for Example 4
  95
- Example 4: Using Signal Processing
  96
- Figure 2 27: a Horizontally and Vertically Expanded Portion of the Calibrator Signal
  96
- Averaging and Enveloping
  97
- Figure 2 28: the Acquire Desc Pop up Menu
  98
- Figure 2 29: Averaged and Normal Traces
  98
- Figure 2 30: the Persist/Histograms Pop up Menu
  100
- Variable Persistence
  100
- Smoothing
  102
- Figure 2 31: the Sampling Head Fnc's Pop up Menu
  103
- Record Length
  103
- Figure 2 32: Connections for Example 5
  105
- Example 5: Taking Automated Measurements
  106
- Figure 2 33: the Measure Major Menu
  107
- Specifying Measurements
  107
- Figure 2 34: the Measurements Pop up Menu
  108
- Figure 2 35: Measurements of a Trace
  109
- Measurement Parameters and Annotations
  110
- Figure 2 36: the RMS Pop up Menu and Annotation Lines
  111
- Default Measurement Parameters
  112
- Figure 2 37: the Default Parameters Pop up Menu
  113
- Measurement Modes
  114
- Table 2 1: Measurement Mode Comparison
  115
- Figure 2 38: the Hardware Measurements Pop up Menu
  116
- Figure 2 39: a Jitter Measurement on the Calibrator Signal
  117
- Figure 2 40: Connections for Example 6
  119
- Example 6: Taking Delay Measurements Using Cursors
  120
- The Cursors Major Menu
  120
- Figure 2 41: the Cursors Major Menu and Cursor Type Pop up Menu
  121
- Figure 2 42: Horizontal Bar Cursors Placed over a Trace
  122
- Figure 2 43: the Cursor Type Pop up Menu in Split Dots Mode
  123
- Using Split Dot Cursors
  123
- Cursor Accuracy Considerations
  125
- Figure 2 44: Connections for Example 7
  127
- Example 7: Taking Comparison Measurements Using a Reference Trace
  128
- Figure 2 45: the Graticules Pop up Menu
  128
- Setting X Axis Units to Meters, Feet, or Inches
  128
- Figure 2 46: the Compare & References Pop up Menu
  130
- Using the Reference Value
  130
- Example 8: Using Saved Trace Descriptions
  134
- Figure 2 47: Connections for Example 8
  134
- Figure 2 48: the Save Trace Desc Pop up Menu
  135
- Example 9: Comparing Traces to Stored Traces
  138
- Example 10: Creating a Histogram Display
  142
- Example 11: Taking TDR Measurements
  145
- Figure 2 54: the Sampling Head Fnc's Pop up Menu
  146
- Figure 2 55: TDR Step and Reflection
  147
- Changing Graticule Units for TDR
  148
- Measuring Distance with TDR
  149
- Acquisition
  151
- Figure 3 1: Acquisition of a Trace
  151
- How Traces Are Acquired
  151
- Determining the Sample Interval
  152
- Controlling Acquisition
  153
- Figure 3 2: Front Panel Acquisition Lights
  153
- Figure 3 3: the Acquire Desc Pop up Menu
  154
- Clearing Traces
  155
- Figure 3 4: the Clear Trace Pop up Menu
  155
- Audio Feedback
  157
- Figure 3 5: the Instrument Options Pop up Menu
  157
- Autoset
  159
- Figure 3 6: Front Panel Autoset Button
  159
- Autoset Options
  160
- Figure 3 7: the Instrument Options Pop up Menu
  160
- Undoing an Autoset
  160
- Averaging and Enveloping
  163
- Defining an Averaged or Enveloped Trace
  164
- Figure 3 8: the Acquire Desc Pop up Menu
  165
- Record Count
  165
- Terminating Averaging or Enveloping
  165
- Limiting Acquisition
  166
- Side Effects of Averaging and Enveloping
  166
- Baseline Correction
  167
- Example
  167
- Calibrator
  169
- Figure 3 9: Location of the CALIBRATOR and INTERNAL CLOCK Outputs
  169
- Color Display
  171
- Color Selection
  171
- Figure 3 10: the Color Pop up Menu
  172
- Restoring Colors
  172
- Reassigning Trace Colors
  173
- Setting the Display Intensity
  173
- Constellation Diagrams
  175
- Displaying a Constellation Diagram
  175
- Figure 3 11: Adjusting the Main Position
  176
- Figure 3 12: How the Expanded Waveforms Should Appear
  177
- Figure 3 13: the Display after Selecting the XY Display Mode
  178
- Cursors
  179
- Cursor Operation
  180
- Figure 3 14: the Cursors Major Menu and Cursor Type Pop up
  180
- Figure 3 15: the Set Zero Pop up Menu
  181
- Cursor Examples
  183
- Diagnostics
  185
- Power on Diagnostics
  186
- Self Test Diagnostics
  187
- Extended Diagnostics
  188
- Figure 3 17: the Extended Diagnostic Pop up Menu in the
  188
- Figure 3 18: the Top Portion of the Extended Diagnostics Menu
  188
- Display Intensity
  191
- Figure 3 19: the Instrument Options Pop up Menu
  191
- Display Persistence
  193
- Figure 3 20: the Persist/Histograms Pop up Menu
  193
- Setting the Persistence Mode
  194
- Table 3 1: a Sample Assignment of Colors to Hit Density
  195
- Figure 3 21: the Color Grad Scale Pop up Menu
  196
- Enhanced Accuracy
  199
- Figure 3 22: the Enhanced Accuracy Major Menu
  199
- Control of Automated Calibration
  200
- Table 3 2: Time Base Cal Mode Comparison
  200
- Table 3 3: Delay Compensate Comparison
  200
- Calibration Assistance
  201
- Figure 3 23: the Calibrate All Pop up Menu
  201
- Sampling Head Calibrations
  203
- Figure 3 24: a Typical Calibration Pop up Menu
  205
- Figure 3 25: Loop Gain Calibration (in Vectored Trace Mode)
  207
- Offset for Sampling Probes
  210
- Displaying an Eye Diagram
  211
- Eye Diagrams
  211
- Figure 3 26: an Eye Diagram Display
  212
- Fast Fourier Transforms
  215
- Defining an FFT Trace
  216
- Figure 3 27: the Deftra Pop up Menu
  216
- Figure 3 28: Location of the Fftmag Icon on the Display
  217
- Amplitude Resolution
  218
- Figure 3 29: Equations for Frequency Interval and Frequency
  218
- Frequency Range and Resolution
  218
- Changing Horizontal and Vertical Size
  219
- FFT Scaling
  220
- Figure 3 30: the Instrument Options Pop up Menu
  220
- Aliasing
  221
- Figure 3 31: Paired Dots Cursors on an FFT Magnitude Display
  222
- Using Cursors to Make Measurements
  222
- Figure 3 32: Using Split Dots Cursors to Measure FFT Phase
  223
- FFT Windowing Functions
  224
- Figure 3 33: FFT Magnitude Displayed Using Rectangular Window
  225
- Figure 3 34: FFT Magnitude Displayed Using Triangular Window
  225
- Figure 3 35: FFT Magnitude Displayed Using Blackman Window
  226
- Figure 3 36: FFT Magnitude Displayed Using Blackman Harris
  227
- Figure 3 37: FFT Magnitude Displayed Using Hanning Window
  227
- Figure 3 38: FFT Magnitude Displayed Using Hamming Window
  228
- Figure 3 39: GPIB Rear Panel Connector and Lights
  229
- GPIB Connection
  229
- GPIB Parameters
  229
- Figure 3 40: the GPIB/RS232C Pop up Menu
  230
- Setting GPIB Parameters
  230
- Figure 3 41: Graticule with Trace
  233
- Graticules
  233
- Figure 3 42: Dual Graticules with Multiple Traces
  234
- Figure 3 43: the Graticules Pop up Menu
  235
- Managing Graticules and Traces
  236
- Changing Axis Units
  237
- Figure 3 44: Printer Connectors on Rear Panel
  239
- Hardcopy
  239
- Installing the Printer
  239
- Figure 3 45: the Hardcopy Pop up Menu
  240
- Hardcopy Parameters
  240
- Table 3 4: Repetition Encodings
  243
- Figure 3 46: Front Panel Hardcopy Button
  244
- Making a Hardcopy
  244
- Hardcopy Defaults
  245
- Table 3 5: Hardcopy Defaults
  245
- Terminating a Hardcopy in Progress
  245
- Figure 3 47: a Histogram Displayed on an Eye Diagram
  247
- Histograms
  247
- Figure 3 48: the Persist/Histograms Pop up Menu
  248
- Displaying a Histogram
  249
- Histogram Controls
  250
- Figure 3 49: Using Stop N Wfms
  252
- Figure 3 50: Histogram Readout Appears below the Trace Display
  254
- The Histogram Readout
  254
- Figure 3 51: Horizontal Controls
  255
- Horizontal Controls
  255
- Setting Horizontal Size and Position
  256
- Pan/Zoom
  257
- Figure 3 52: Horizontal Magnification with Pan/Zoom
  258
- Changing the Horizontal Reference Point
  259
- Figure 3 53: the Horizontal Desc Pop up Menu
  260
- Figure 3 54: the Initialize Verification Pop up Menu
  261
- Initialization
  261
- Initializing and Erasing Nonvolatile RAM
  262
- Figure 3 55: Labels Displayed with Active Traces
  263
- Labeling
  263
- Creating Labels
  264
- Figure 3 56: the Labeling Pop up Menu
  265
- Displaying Labels with Traces
  266
- Figure 3 57: Mask Testing on an Eye Diagram
  267
- Mask Testing
  267
- Figure 3 58: the Standard Masks Pop up Menu
  269
- Using Predefined Telecommunication Masks
  269
- Figure 3 59: Page 2 of the SONET/SDH Optical Standards
  270
- Figure 3 60: Pages 2 and 3 of the ITU T Electrical Standards
  270
- Creating Masks
  272
- Figure 3 61: the Mask Testing Pop up Menu
  272
- Figure 3 62: Editing a Mask
  273
- Figure 3 63: Creating a User Mask
  274
- Figure 3 64: How Points Are Connected in a User Mask
  275
- Starting Mask Testing
  278
- Figure 3 65: Mask Count Readout
  279
- Figure 3 66: Using Stop N Wfms
  280
- Standard Mask Definitions and Requirements
  281
- Table 3 6: ITU T Electrical Standards Masks
  281
- Table 3 7: SONET/SDH Optical Standards Masks
  282
- Table 3 8: Fibre Channel Standards Masks
  282
- Table 3 10: Miscellaneous Standards Masks
  283
- Table 3 9: ANSI T1.102 Electrical Standard Masks
  283
- Measurements
  285
- Figure 3 67: Measure Major Menu
  288
- Setting up Measurements
  288
- Figure 3 68: Measurements Pop up Menu with Frequency and RMS Selected
  289
- Deleting Measurements
  290
- Topline/Baseline Calculation
  290
- Measurement Mode
  291
- Table 3 12: Measurement Mode Comparison
  293
- Comparing Measurements to References
  295
- Figure 3 69: Compare & References Pop up Menu
  296
- Changing Measurement Parameters
  297
- Figure 3 70: a Typical Individual Measurement Pop up Menu
  298
- Table 3 13: Measurement Parameters
  299
- Figure 3 71: Statistics in an Individual Measurement Pop up Menu
  304
- Measurement Statistics
  304
- Changing Default Parameters
  305
- Figure 3 72: Measurements Pop up Menu with Software Defaults
  306
- Figure 3 73: Power Connector, Fuse, and Switches
  307
- Figure 3 74: Front Panel ON/STANDBY Switch
  307
- Installation
  307
- Power on
  307
- Power on Sequence
  309
- Warm up Period
  309
- Figure 3 75: Traces with Record Lengths of 512 (Top) and
  311
- Record Length
  311
- Figure 3 76: the Horizontal Desc Pop up Menu
  312
- Figure 3 77: Location of RS 232 C Connector
  313
- RS 232 C Connection
  313
- RS 232 C Parameters
  313
- Figure 3 78: the GPIB/RS232C Pop up Menu
  314
- Setting RS 232 C Parameters
  314
- Figure 3 79: Location of Sampling Head Compartments
  317
- Sampling Heads
  317
- Figure 3 80: Sampling Head Control Panel (SD 24 Shown)
  318
- Installing Sampling Heads
  318
- Sampling Head Front Panel
  318
- Controlling TDR and Smoothing Functions
  320
- Figure 3 81: the Sampling Head Fnc's Pop up Menu
  321
- Saved Trace Descriptions
  323
- Figure 3 82: the Save Trace Desc Pop up Menu
  324
- Recalling a Saved Trace Description
  325
- Saving a Trace Description
  325
- Deleting a Saved Trace Description
  326
- Deleting All Saved Trace Descriptions
  326
- Saving All Displayed Traces as Saved Trace Descriptions
  326
- Stored Settings
  327
- Figure 3 83: the Store Setting Pop up Menu
  328
- Storing Settings
  328
- Figure 3 84: the Recall Setting Pop up Menu
  329
- Recalling Stored Settings
  329
- Deleting Stored Settings
  330
- Figure 3 85: the Delete Setting Pop up Menu
  330
- Figure 3 86: Front Panel SEQUENCE SETTING Button
  331
- Sequencing through Stored Settings
  331
- Stored Traces
  333
- Figure 3 87: the Store Trace Pop up Menu
  334
- Storing Traces
  334
- Figure 3 88: the Recall Trace Pop up Menu
  335
- Recalling Stored Traces
  335
- Deleting Stored Traces
  336
- Figure 3 89: the Delete Trace Pop up Menu
  336
- Displaying Time and Date with Stored Traces
  337
- Figure 3 90: the Identify Pop up Menu
  339
- System Identification
  339
- Figure 3 91: Step Generator Simplified Schematic Diagram
  341
- Tdr
  341
- TDR Step Generation
  341
- Figure 3 92: Step Generator with a Shorted Output
  342
- Figure 3 93: Step Generation with a 50 W Load
  342
- Figure 3 94: Step Generation with a 50 W Load
  343
- Example: Taking TDR Measurements
  344
- Figure 3 95: Connections for Example
  344
- Figure 3 96: TDR Step and Reflection
  345
- Figure 3 97: the Graticules Pop up Menu
  346
- Example: Differential and Common Mode TDR
  348
- Figure 3 98: Single Channel TDR
  349
- Figure 3 99: Channels 1 and 2 TDR
  350
- Figure 3 100: Ensuring Pulses Arrive at the Reference Plane at the same Time
  352
- More about TDR Measurements
  352
- Figure 3 101: the Instrument Options Pop up Menu
  353
- Time and Date
  353
- Displaying Time and Date with Stored Traces
  354
- Trace Definition and Management
  355
- Defining New Traces
  356
- Figure 3 102: the Deftra Pop up Menu
  357
- Table 3 14: Trace Functions
  358
- Trace Numbers
  359
- Selecting Traces
  360
- Figure 3 103: the Trace Status Menu
  361
- Modifying Traces
  361
- Removing Traces
  362
- Trace Scaling
  364
- Triggering
  365
- Vectored Traces
  369
- Vertical Controls
  371
- Setting Vertical Size and Offset
  372
- Windows
  375
- Changing Window Size and Position
  376
- Positioning Window Traces Automatically
  377
- XY Traces
  381
- Appendix A: Accessories
  385
- Optional Accessories
  385
- Standard Accessories
  385
- Power Cord Options
  386
- Appendix B: Specifications
  387
- Table B 1: 11801C Vertical System Specifications
  387
- Table B 2: 11801C Time Base Specifications
  388
- Table B 3: 11801C Input and Output Specifications
  389
- Table B 4: 11801C Trigger Specifications
  390
- Table B 5: 11801C Display Specifications
  391
- Table B 6: 11801C AC Line Power Specifications
  392
- Table B 7: 11801C Environmental Specifications
  392
- Table B 8: 11801C Certifications and Compliances
  393
- Appendix C: User Service
  395
- Cleaning the Instrument
  395
- Packaging for Shipment
  396
- Table D 1: Filter Characteristics of FFT Windowing Functions
  401
- Table D 2: Values of Icoeff for FFT Windowing Functions
  412
- Table D 3: Values of Wcoeff and M for FFT Windowing Functions
  418
- Menu
  430
- Window
  434

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