RIGOL DHO4404, DHO4804, DHO4204 User manual

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Guaranty and Declaration

Trademark Information

RIGOL®is the trademark of RIGOL TECHNOLOGIES CO., LTD.

Notices

• RIGOL products are covered by P.R.C. and foreign patents, issued and pending.

• RIGOL reserves the right to modify or change parts of or all the specifications and pricing

policies at the company's sole decision.

• Information in this publication replaces all previously released materials.

• Information in this publication is subject to change without notice.

• RIGOL shall not be liable for either incidental or consequential losses in connection with the

furnishing, use, or performance of this manual, as well as any information contained.

• Any part of this document is forbidden to be copied, photocopied, or rearranged without prior

written approval of RIGOL.

Product Certification

RIGOL guarantees that this product conforms to the national and industrial standards in China as well as the ISO9001:2015 standard and the ISO14001:2015 standard. Other international standard

conformance certifications are in progress.

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Section Description Page

List of Figures...........................................................................................................................VIII

List of Tables

1 Safety Requirement.....................................................................................................................1

1.1 General Safety Summary................................................................................................... 1

1.2 Safety Notices and Symbols.............................................................................................3

1.3 Measurement Category..................................................................................................... 3

1.4 Ventilation Requirement....................................................................................................4

1.5 Working Environment.........................................................................................................4

1.6 Care and Cleaning................................................................................................................6

1.7 Environmental Considerations.........................................................................................6

2 Product Features..........................................................................................................................8

3 Document Overview................................................................................................................... 9

4 Quick Start................................................................................................................................... 11

4.1 General Inspection.............................................................................................................11

4.2 Appearance and Dimensions.........................................................................................12

4.3 To Prepare for Use.............................................................................................................13

4.3.1 Tilting the Oscilloscope for Easier Viewing...................................................... 13

.............................................................................................................................XIV

4.3.2 Connecting to Power................................................................................................13

4.3.3 Turn-on Checkout......................................................................................................14

4.3.4 Replacing the Fuse....................................................................................................14

4.3.5 Setting the System Language............................................................................... 15

4.3.6 Connecting Probes....................................................................................................15

4.3.7 Function Inspection.................................................................................................. 17

4.3.8 Probe Compensation................................................................................................18

4.4 Product Overview.............................................................................................................. 19

4.4.1 Front Panel Overview...............................................................................................20

4.4.2 Rear Panel Overview.................................................................................................26

4.4.3 User Interface Overview..........................................................................................28

4.5 Touch Screen Gestures.....................................................................................................30

4.5.1 Tap...................................................................................................................................30

4.5.2 Pinch&Stretch.............................................................................................................31

4.5.3 Drag................................................................................................................................31

4.6 Parameter Setting Method.............................................................................................32

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4.7 Using the Security Lock................................................................................................... 38

4.8 Accessing the Built-in Help System............................................................................. 38

4.9 Viewing the Option Information and Install the Option......................................39

5 Vertical System...........................................................................................................................41

5.1 To Enable or Disable the Analog Channel.................................................................41

5.2 To Adjust the Vertical Scale............................................................................................ 43

5.3 To Adjust the Vertical Offset.......................................................................................... 44

5.4 To Specify Channel Coupling.........................................................................................45

5.5 To Specify Bandwidth Limit............................................................................................ 45

5.6 To Specify Input Impedance...........................................................................................46

5.7 To Invert a Waveform.......................................................................................................47

5.8 To Set Probe.........................................................................................................................48

5.9 To Specify the Amplitude Unit...................................................................................... 51

5.10 To Adjust Bias......................................................................................................................51

5.11 To Specify the Skew...........................................................................................................52

5.12 To Turn the Channel Label Display On/Off............................................................... 53

6 Horizontal System.....................................................................................................................54

6.1 To Adjust the Horizontal Time Base............................................................................ 54

6.2 To Adjust the Horizontal Position................................................................................ 55

6.3 Zoom Mode (Delayed Sweep).......................................................................................56

7 Acquisition System....................................................................................................................59

7.1 Acquisition Mode...............................................................................................................59

7.2 Sampling Mode..................................................................................................................62

7.3 Sample Rate.........................................................................................................................62

7.4 Memory Depth................................................................................................................... 63

7.5 Horizontal Expansion Reference...................................................................................65

7.6 Roll Mode............................................................................................................................. 65

7.7 XY Mode................................................................................................................................66

8 Triggering the Oscilloscope................................................................................................... 69

8.1 Trigger Source.....................................................................................................................69

8.2 Trigger Level........................................................................................................................ 70

8.3 Trigger Mode.......................................................................................................................71

8.4 Trigger Coupling.................................................................................................................72

8.5 Trigger Holdoff....................................................................................................................73

8.6 Noise Rejection...................................................................................................................73

8.7 Trigger Type.........................................................................................................................74

8.7.1 Edge Trigger................................................................................................................ 74

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8.7.2 Pulse Width Trigger.................................................................................................. 76

8.7.3 Slope Trigger...............................................................................................................78

8.7.4 Video Trigger...............................................................................................................81

8.7.5 Pattern Trigger............................................................................................................84

8.7.6 Duration Trigger.........................................................................................................86

8.7.7 Timeout Trigger..........................................................................................................89

8.7.8 Runt Trigger.................................................................................................................91

8.7.9 Window Trigger..........................................................................................................94

8.7.10 Delay Trigger............................................................................................................... 96

8.7.11 Setup/Hold Trigger................................................................................................... 98

8.7.12 Nth Edge Trigger..................................................................................................... 101

8.7.13 RS232 Trigger........................................................................................................... 103

8.7.14 I2C Trigger................................................................................................................. 106

8.7.15 SPI Trigger..................................................................................................................110

8.7.16 CAN Trigger...............................................................................................................112

8.7.17 FlexRay Trigger (Optional)....................................................................................116

8.7.18 LIN Trigger (Optional)............................................................................................119

8.7.19 I2S Trigger (Optional).............................................................................................121

8.7.20 MIL-STD-1553 Trigger (Optional)......................................................................125

8.8 Trigger Output Connector............................................................................................129

9 Math Operation.......................................................................................................................130

9.1 Arithmetic Operation..................................................................................................... 131

9.2 Function Operation.........................................................................................................134

9.3 FFT Operation...................................................................................................................138

9.4 Logic Operation............................................................................................................... 143

9.5 Digital Filter....................................................................................................................... 146

10 Measurements..........................................................................................................................151

10.1 Auto Scale..........................................................................................................................151

10.2 Auto Measurements.......................................................................................................152

10.2.1 Measurement Parameter......................................................................................152

10.2.1.1 Time Parameters..............................................................................................153

10.2.1.2 Count Values.....................................................................................................154

10.2.1.3 Delay and Phase Parameters...................................................................... 156

10.2.1.4 Voltage Parameters........................................................................................157

10.2.1.5 Other Parameters............................................................................................159

10.2.2 Select the Measurement Item.............................................................................159

10.2.3 Measurement Settings.......................................................................................... 162

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10.2.4 Remove the Measurement Results................................................................... 165

10.3 Cursor Measurements....................................................................................................165

10.3.1 Manual Mode........................................................................................................... 167

10.3.2 Track Mode................................................................................................................169

10.3.3 XY Mode.....................................................................................................................172

11 Digital Voltmeter (DVM) and Frequency Counter....................................................... 175

11.1 Digital Voltmeter (DVM)................................................................................................175

11.1.1 Measurement Settings.......................................................................................... 176

11.1.2 Remove the Measurement...................................................................................177

11.2 Frequency Counter..........................................................................................................177

11.2.1 Measurement Settings.......................................................................................... 178

11.2.2 Reset Statistics..........................................................................................................179

11.2.3 Remove the Measurement...................................................................................179

12 Power Analysis (Optional)....................................................................................................180

12.1 Power Quality....................................................................................................................180

12.2 Ripple...................................................................................................................................182

13 Reference Waveform..............................................................................................................185

13.1 To Enable Ref Function..................................................................................................185

13.2 To Set the Reference Waveform.................................................................................185

13.3 To Set the Ref Waveform Display...............................................................................186

13.4 Export and Import Operation..................................................................................... 187

14 Pass/Fail Test.............................................................................................................................189

14.1 To Enable or Disable the Pass/Fail Test Function..................................................189

14.2 To Select the Source.......................................................................................................190

14.3 To Create a Mask............................................................................................................. 190

14.4 To Set the Output Form of the Test Results........................................................... 190

14.5 To Start or Stop the Pass/Fail Test Operation........................................................ 191

14.6 To Display the Statistics of the Test Results............................................................192

15 Protocol Decoding..................................................................................................................194

15.1 Parallel Decoding.............................................................................................................194

15.1.1 Clock Setting (CLK)................................................................................................. 195

15.1.2 Bus Setting.................................................................................................................196

15.1.3 Display-related Settings........................................................................................197

15.1.4 Event Table.................................................................................................................197

15.2 RS232 Decoding.............................................................................................................. 198

15.2.1 Source Setting..........................................................................................................199

15.2.2 To Set Data Package...............................................................................................200

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15.2.3 Display-related Settings........................................................................................201

15.2.4 Event Table.................................................................................................................201

15.3 I2C Decoding.................................................................................................................... 202

15.3.1 Source Setting..........................................................................................................203

15.3.2 Display-related Settings........................................................................................204

15.3.3 Event Table.................................................................................................................204

15.4 SPI Decoding.....................................................................................................................206

15.4.1 To Set the Source.................................................................................................... 207

15.4.2 To Set Mode and Data...........................................................................................207

15.4.3 Display-related Settings........................................................................................209

15.4.4 Event Table.................................................................................................................209

15.5 CAN Decoding..................................................................................................................210

15.5.1 Signal Configuration.............................................................................................. 211

15.5.2 Display-related Settings........................................................................................212

15.5.3 Event Table.................................................................................................................212

15.6 LIN Decoding (Optional)...............................................................................................214

15.6.1 Signal Configuration.............................................................................................. 214

15.6.2 Display-related Settings........................................................................................215

15.6.3 Event Table.................................................................................................................215

15.7 I2S Decoding (Optional)................................................................................................217

15.7.1 Source Setting..........................................................................................................217

15.7.2 Bus Setting.................................................................................................................218

15.7.3 Display-related Settings........................................................................................219

15.7.4 Event Table.................................................................................................................219

15.8 FlexRay Decoding (Optional).......................................................................................220

15.8.1 Signal Configuration.............................................................................................. 221

15.8.2 Display-related Settings........................................................................................222

15.8.3 Event Table.................................................................................................................222

15.9 1553B Decoding (Optional)......................................................................................... 224

15.9.1 To Set the Data Channel Source and the Threshold...................................225

15.9.2 Display-related Settings........................................................................................225

15.9.3 Event Table.................................................................................................................225

16 Multi-pane Windowing.........................................................................................................228

17 Waveform Recording and Playing.....................................................................................230

17.1 Common Settings............................................................................................................230

17.2 Record Options................................................................................................................ 231

17.3 Play Options......................................................................................................................232

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18 Search and Navigation..........................................................................................................235

18.1 Search..................................................................................................................................235

18.2 Navigation..........................................................................................................................237

19 Display Control........................................................................................................................ 241

19.1 Display Type......................................................................................................................241

19.2 Persistence Time..............................................................................................................241

19.3 Waveform Intensity.........................................................................................................242

19.4 To Set the Screen Grid................................................................................................... 242

19.5 Display Settings................................................................................................................242

19.6 Show Scale.........................................................................................................................243

19.7 Color Grade....................................................................................................................... 243

19.8 Waveform Freeze.............................................................................................................243

20 Store and Load.........................................................................................................................244

20.1 To Enter the Storage Menu..........................................................................................244

20.2 To Save a File.....................................................................................................................244

20.2.1 Save Image................................................................................................................244

20.2.2 Save Wave..................................................................................................................246

20.2.3 Save Setup.................................................................................................................248

20.2.4 Binary Data Format (.bin)..................................................................................... 249

20.3 Load a File..........................................................................................................................252

20.4 Firmware Upgrade...........................................................................................................253

20.5 Disk Management...........................................................................................................254

21 System Utility Function Setting..........................................................................................257

21.1 I/O Setting..........................................................................................................................257

21.2 Basic Settings....................................................................................................................259

21.3 About this Oscilloscope................................................................................................ 261

21.4 Other Settings...................................................................................................................262

21.5 Auto Config....................................................................................................................... 262

21.6 SelfCal..................................................................................................................................263

21.7 Option List..........................................................................................................................264

21.8 Quick Action Settings.....................................................................................................264

21.9 Self-check...........................................................................................................................266

22 Remote Control........................................................................................................................268

22.1 Remote Control via USB................................................................................................269

22.2 Remote Control via LAN............................................................................................... 269

22.3 Remote Control via GPIB.............................................................................................. 270

23 Troubleshooting...................................................................................................................... 272

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24 Appendix....................................................................................................................................274

24.1 Appendix A: Options and Accessories..................................................................... 274

24.2 Appendix B: Warranty....................................................................................................275

24.3 Appendix C: Factory Settings...................................................................................... 275

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DHO4000 User Guide

Page 10

List of Figures

Figure 4.1 Front View ..............................................................................................................12

Figure 4.2 Side View ................................................................................................................12

Figure 4.3 Flipping in/out Tabs ........................................................................................... 13

Figure 4.4 Connecting to Power ......................................................................................... 13

Figure 4.5 Replacing the Fuse ............................................................................................. 15

Figure 4.6 Connecting the Passive Probe ........................................................................16

Figure 4.7 Connecting the Probe Head to the PA of the Active Probe .................16

Figure 4.8 Connecting the Active Probe ..........................................................................17

Figure 4.9 Using the Compensation Signal .................................................................... 18

Figure 4.10 Square Waveform Signal ................................................................................18

Figure 4.11 Probe Compensation ...................................................................................... 19

Figure 4.12 Front Panel ..........................................................................................................20

Figure 4.13 Rear Panel ............................................................................................................26

Figure 4.14 User Interface .....................................................................................................28

Figure 4.15 Tap Gesture .........................................................................................................31

Figure 4.16 Pinch&Stretch Gesture ....................................................................................31

Figure 4.17 Drag Gesture ......................................................................................................32

Figure 4.18 English Input Interface ....................................................................................33

Figure 4.19 Chinese Input Interface .................................................................................. 34

Figure 4.20 String Keypad .....................................................................................................36

Figure 4.21 Numeric Keypad ................................................................................................37

Figure 4.22 To Use the Security Lock ................................................................................38

Figure 5.1 Vertical Menu ....................................................................................................... 41

Figure 5.2 Switched Input Impedance ..............................................................................47

Figure 5.3 Waveform Invert On/Off .................................................................................. 48

Figure 5.4 Probe Setting Menu ...........................................................................................49

Figure 5.5 Active Probe Setting Menu ..............................................................................49

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Figure 5.6 Zero Offset ............................................................................................................ 53

Figure 6.1 Horizontal Menu ................................................................................................. 54

e 6.2 Zoom Mode ..........................................................................................................57

Figur

Figure 7.1 Horizontal Menu ................................................................................................. 59

Figure 7.2 Display Modes ......................................................................................................61

Figure 7.3 Memory Depth .................................................................................................... 64

Figure 7.4 XY Menu .................................................................................................................67

Figure 7.5 Measurement Schematic Diagram of Phase Deviation .........................68

Figure 8.1 Schematic Diagram of the Acquisition Memory ......................................71

Figure 8.2 Trigger Holdoff .....................................................................................................73

Figure 8.3 Edge Trigger Setting Menu ..............................................................................74

Figure 8.4 Positive/Negative Pulse Width .......................................................................76

Figure 8.5 Pulse Width Trigger Setting Menu ................................................................76

Figure 8.6 Positive Slope Time/Negative Slope Time ................................................. 79

Figure 8.7 Slope Trigger Setting Menu ............................................................................ 79

Figure 8.8 Video Trigger Setting Menu ............................................................................82

Figure 8.9 Pattern Trigger ..................................................................................................... 84

Figure 8.10 Pattern Trigger Setting Menu .......................................................................85

Figure 8.11 Duration Trigger ................................................................................................87

Figure 8.12 Duration Trigger Setting Menu ....................................................................87

Figure 8.13 Timeout Trigger .................................................................................................89

Figure 8.14 Timeout Trigger Menu ....................................................................................90

Figure 8.15 Runt Trigger ........................................................................................................91

Figure 8.16 Runt Trigger Setting Menu ............................................................................92

Figure 8.17 Window Trigger Setting Menu .....................................................................94

Figure 8.18 Delay Trigger ......................................................................................................96

Figure 8.19 Delay Trigger Setting Menu ..........................................................................96

Figure 8.20 Setup/Hold Trigger .......................................................................................... 99

Figure 8.21 Setup/Hold Trigger Setting Menu ..............................................................99

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Figure 8.22 Nth Edge Trigger ............................................................................................101

Figure 8.23 Nth Edge Trigger Setting Menu ................................................................102

e 8.24 Schematic Diagram of RS232 Protocol ...................................................103

Figur

Figure 8.25 RS232 Trigger Setting Menu ......................................................................104

Figure 8.26 Sequence Diagram of I2C Protocol ..........................................................106

Figure 8.27 I2C Trigger Setting Menu ............................................................................107

Figure 8.28 Binary Format Setting ...................................................................................108

Figure 8.29 Hexadecimal Format Setting ......................................................................109

Figure 8.30 Sequential Chart of SPI Bus ........................................................................110

Figure 8.31 SPI Trigger Setting Menu ............................................................................ 110

Figure 8.32 Data Frame Format of the CAN Bus ........................................................113

Figure 8.33 CAN Trigger Setting Menu ..........................................................................113

Figure 8.34 Sample Position ..............................................................................................114

Figure 8.35 Frame Format of FlexRay Bus .................................................................... 116

Figure 8.36 FlexRay Trigger Setting Menu ....................................................................117

Figure 8.37 Data Frame Format of the LIN Bus .......................................................... 119

Figure 8.38 LIN Trigger Setting Menu ............................................................................119

Figure 8.39 Sample Position ..............................................................................................120

Figure 8.40 Sequential Chart of I2S Bus ........................................................................122

Figure 8.41 I2S Trigger Setting Menu .............................................................................122

Figure 8.42 Formats of the Command Word, Data Word, and Status Word of

the 1553B Bus ....................................................................................................................126

Figure 8.43 MIL-STD-1553 Trigger Setting Menu ......................................................126

Figure 9.1 Math Menu .........................................................................................................130

Figure 9.2 Waveform Display Window of the Operation Results .........................131

Figure 9.3 Arithmetic Operation Menu ..........................................................................132

Figure 9.4 Operation Result Display Window ..............................................................132

Figure 9.5 Function Operation Menu .............................................................................135

Figure 9.6 Operation Result Display Window ..............................................................136

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Figure 9.7 FFT Operation Menu ....................................................................................... 138

Figure 9.8 FFT Operation Window .................................................................................. 139

e 9.9 Peak Search .........................................................................................................142

Figur

Figure 9.10 Logic Operation Menu .................................................................................143

Figure 9.11 Operation Result Display Window ...........................................................144

Figure 9.12 Digital Filter Menu .........................................................................................147

Figure 9.13 Operation Result Display Window ...........................................................147

Figure 10.1 Time Parameters .............................................................................................153

Figure 10.2 Delay and Phase Parameters ......................................................................156

Figure 10.3 Voltage Parameters ....................................................................................... 157

Figure 10.4 Vertical Measurement Items ...................................................................... 160

Figure 10.5 Horizontal Measurement Items ................................................................ 161

Figure 10.6 Other Measurement Items ..........................................................................161

Figure 10.7 Measurement Settings Menu .................................................................... 162

Figure 10.8 Cursors ...............................................................................................................165

Figure 10.9 Manual Mode Setting Menu ......................................................................167

Figure 10.10 Manual Cursor Measurement Example ................................................169

Figure 10.11 Track Mode Setting Menu ........................................................................170

Figure 10.12 Track Measurement (before Horizontal Expansion) ........................ 171

Figure 10.13 Track Measurement (after Horizontal Expansion) ............................172

Figure 10.14 XY Mode Setting Menu ............................................................................. 173

Figure 11.1 DVM Setting Menu ........................................................................................176

Figure 11.2 Frequency Counter Setting Menu ............................................................178

Figure 12.1 UPA Menu .........................................................................................................180

Figure 12.2 Power Quality Analysis Results Display .................................................. 182

Figure 12.3 Connection Diagram of Power Quality Analysis ..................................182

Figure 12.4 Ripple Analysis Results Display .................................................................183

Figure 12.5 Connection Diagram of Ripple Analysis .................................................184

Figure 13.1 Reference Waveform Menu ........................................................................185

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Figure 14.1 Pass/Fail Test Menu ....................................................................................... 189

Figure 14.2 Pass/F

ail Test Interface ................................................................................. 192

Figure 15.1 Schematic Diagram of Parallel Decoding .............................................. 194

Figure 15.2 Parallel Decoding Menu .............................................................................. 195

Figure 15.3 Parallel Decoding Event Table ....................................................................197

Figure 15.4 Schematic Diagram of RS232 Serial Bus ................................................198

Figure 15.5 RS232 Decoding Menu ................................................................................ 199

Figure 15.6 RS232 Decoding Event Table ..................................................................... 202

Figure 15.7 I2C Serial Bus ...................................................................................................203

Figure 15.8 I2C Decoding Menu ...................................................................................... 203

Figure 15.9 I2C Decoding Event Table ........................................................................... 205

Figure 15.10 SPI Serial Bus .................................................................................................206

Figure 15.11 SPI Decoding Menu ....................................................................................206

Figure 15.12 SPI Decoding Event Table ......................................................................... 209

Figure 15.13 CAN Decoding Menu ................................................................................. 210

Figure 15.14 Sample Position ............................................................................................212

Figure 15.15 CAN Decoding Event Table ...................................................................... 213

Figure 15.16 LIN Decoding Menu ....................................................................................214

Figure 15.17 LIN Decoding Event Table .........................................................................216

Figure 15.18 I2S Decoding Menu .................................................................................... 217

Figure 15.19 I2S Decoding Event Table ......................................................................... 219

Figure 15.20 FlexRay Decoding Menu ........................................................................... 220

Figure 15.21 Sample Position ............................................................................................222

Figure 15.22 FlexRay Decoding Event Table ................................................................ 223

Figure 15.23 1553B Decoding Menu ..............................................................................224

Figure 15.24 1553B Decoding Event Table ................................................................... 226

Figure 16.1 "Add Window" Menu ....................................................................................228

Figure 17.1 "Record" Menu ................................................................................................230

Figure 17.2 Minimized "Play" Menu ............................................................................... 233

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Figure 18.1 Search Menu ....................................................................................................235

Figure 18.2 MarkTable Display

..........................................................................................237

Figure 18.3 Navigation Menu ........................................................................................... 238

Figure 18.4 Simplified Navigation Menu ...................................................................... 238

Figure 18.5 "Search Event" Navigation Setting Menu ..............................................239

Figure 18.6 "Frame Segment" Navigation Setting Menu ........................................239

Figure 19.1 Display Setting Menu ................................................................................... 241

Figure 20.1 Image Saving Setting Menu .......................................................................245

Figure 20.2 Waveform Saving Setting Menu ...............................................................247

Figure 20.3 Setup Saving Setting Menu ........................................................................248

Figure 20.4 Load Setting Menu ........................................................................................253

Figure 20.5 Upgrade Menu ................................................................................................254

Figure 20.6 Disk Management Interface .......................................................................255

Figure 21.1 Self-calibration Menu ................................................................................... 263

Figure 21.2 Quick Menu ......................................................................................................264

Figure 21.3 Key Test Interface ...........................................................................................266

Figure 21.4 Touch Screen Test Interface ........................................................................267

Figure 22.1 Search for the Available Device .................................................................271

Figure 22.2 Confirm the Available Device .....................................................................271

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Page 16

List of Tables

Table 5.1 Bandwidth Limit .....................................................................................................46

Table 5.2 Probe Ratio ..............................................................................................................50

Table 8.1 Video Standard ...................................................................................................... 83

Table 9.1 Window Function ................................................................................................140

Table 9.2 Logic Operation .................................................................................................. 144

Table 15.1 Bus Setting ..........................................................................................................196

Table 20.1 BIN File Format ................................................................................................. 249

Table 20.2 File Header ..........................................................................................................250

Table 20.3 Waveform Header ............................................................................................250

Table 20.4 Waveform Data Header ................................................................................. 252

Table 24.2 Factory Settings ................................................................................................275

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Safety Requirement

1.1 General Safety Summary

Please review the following safety precautions carefully before putting the instrument into operation so as to av any product connected to it. To prevent potential hazards, please follow the instructions specified in this manual to use the instrument properly.

• Use Proper Power Cord.

Only the exclusive power cord designed for the instrument and authorized for use within the destination country could be used.

• Ground the Instrument.

The instrument is grounded through the Protective Earth lead of the power cord. To avoid electric shock, it is essential to connect the earth terminal of the power cord to the Protective Earth terminal before connecting any inputs or outputs.

• Connect the Probe Correctly.

oid any personal injury or damage to the instrument and

If a probe is used, the probe ground lead must be connected to earth ground. Do not connect the ground lead to high voltage. Improper way of connection could result in dangerous voltages being present on the connectors, controls or other surfaces of the oscilloscope and probes, which will cause potential hazards for operators.

• Observe All Terminal Ratings.

To avoid fire or shock hazard, observe all ratings and markers on the instrument and check your manual for more information about ratings before connecting the instrument.

• Use Proper Overvoltage Protection.

Ensure that no overvoltage (such as that caused by a bolt of lightning) can reach the product. Otherwise, the operator might be exposed to the danger of an electric shock.

• Do Not Operate Without Covers.

Do not operate the instrument with covers or panels removed.

• Do Not Insert Objects Into the Air Outlet.

Do not insert objects into the air outlet, as doing so may cause damage to the instrument.

• Use the Proper Fuse.

Please use the specified fuses.

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Safety Requirement

• Avoid circuit or wire exposure.

• Do Not Operate With Suspected Failures.

• Keep Well Ventilation.

• Do Not Operate in Wet Conditions.

Do not touch exposed junctions and components when the instrument is power

ed on.

If you suspect damage occurs to the instrument, have it inspected by RIGOL authorized personnel before further operations. Any maintenance, adjustment or replacement especially to circuits or accessories must be performed by RIGOL authorized personnel.

Inadequate ventilation may cause an increase of temperature in the instrument, which would cause damage to the instrument. So please keep the instrument well ventilated and inspect the air outlet and the fan regularly.

To avoid short circuit inside the instrument or electric shock, never operate the instrument in a humid environment.

• Do Not Operate in an Explosive Atmosphere.

To avoid personal injuries or damage to the instrument, never operate the instrument in an explosive atmosphere.

• Keep Instrument Surfaces Clean and Dry.

To avoid dust or moisture from affecting the performance of the instrument, keep the surfaces of the instrument clean and dry.

• Prevent Electrostatic Impact.

Operate the instrument in an electrostatic discharge protective environment to avoid damage induced by static discharges. Always ground both the internal and external conductors of cables to release static before making connections.

• Use the Battery Properly.

Do not expose the battery (if available) to high temperature or fire. Keep it out of the reach of children. Improper change of a battery (lithium battery) may cause an explosion. Use the RIGOL specified battery only.

• Handle with Caution.

Please handle with care during transportation to avoid damage to keys, knobs, interfaces, and other parts on the panels.

WARNING

Equipment meeting Class A requirements may not o

services within residential environment.

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ffer adequate protection to broadcast

Page 19

1.2 Safety Notices and Symbols

Safety Notices in this Manual:

WARNING

Safety Requirement

Indicates a potentially hazar

serious injury or death.

CAUTION

Indicates a potentially hazar

in damage to the product or loss of important data.

Safety Notices on the Product:

• DANGER

It calls att or hazard immediately.

• WARNING

It calls attention to an operation, if not correctly performed, could result in potential injury or hazard.

• CAUTION

It calls attention to an operation, if not correctly performed, could result in damage to the product or other devices connected to the product.

ention to an operation, if not correctly performed, could result in injury

dous situation or practice which, if not avoided, will result in

dous situation or practice which, if not avoided, could result

Safety Symbols on the Product:

Hazardous

Voltage

Safety War

ning Protective Earth

1.3 Measurement Category

Measurement Category

This instrument can make measurements in Measur

WARNING

This instrument can only be used for measurements within its specified measur

categories.

Chassis Ground Test Ground

Terminal

ement Category I.

ement

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Page 20

Safety Requirement

Measurement Category Definitions

• Measurement cat

connected to MAINS. Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits. In the latter case, transient stresses are variable. Thus, you must know the transient withstand capability of the equipment.

• Measurement category II is for measurements performed on circuits directly

connected to low voltage installation. Examples are measurements on household appliances, portable tools and similar equipment.

• Measurement category III is for measurements performed in the building

installation. Examples are measurements on distribution boards, circuit-breakers, wiring (including cables, bus-bars, junction boxes, switches and socket-outlets) in the fixed installation, and equipment for industrial use and some other equipment. For example, stationary motors with permanent connection to a fixed installation.

• Measurement category IV is for measurements performed at the source of a

low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units.

egory I is for measurements performed on circuits not directly

1.4 Ventilation Requirement

This instrument uses a fan to force cooling. Please make sure that the air inlet and outlet areas are fr in a bench-top or rack setting, provide at least 10 cm clearance beside, above and behind the instrument for adequate ventilation.

CAUTION

Inadequate ventilation may cause an increase of temperature in the instrument, which

would cause damage to the instrument. So please keep the instrument well ventilated and

inspect the air outlet and the fan regularly.

ee from obstructions and have free air. When using the instrument

1.5 Working Environment

Temperature

Operating: 0℃ to +50℃

Non-operating: -30℃ to +60℃

Humidity

• Operating:

Below +30℃: ≤90% RH (without condensation)

+30℃ to +40℃: ≤75% RH (without condensation)

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Page 21

+40℃ to +50℃: ≤45% RH (without condensation)

• Non-operating:

Below +60℃: ≤90% RH (without condensation)

WARNING

Safety Requirement

To avoid shor

instrument in a humid environment.

t circuit inside the instrument or electric shock, never operate the

Altitude

• Operating: below 3 km

• Non-operating: below 15 km

otection Level Against Electric Shock

ESD ±8kV

Installation (Overvoltage) Category

This product is powered by mains conforming to installation (overvoltage) category II.

WARNING

Ensure that no over

product. Otherwise, the operator might be exposed to the danger of an electric shock.

voltage (such as that caused by a bolt of lightning) can reach the

Installation (Overvoltage) Category Definitions

Installation (overv

oltage) category I refers to signal level which is applicable to equipment measurement terminals connected to the source circuit. Among these terminals, precautions are done to limit the transient voltage to a low level.

Installation (overvoltage) category II refers to the local power distribution level which is applicable to equipment connected to the AC line (AC power).

Pollution Degree

Pollution Degree 2

Pollution Degree Definition

• Pollution Degree 1: No pollution or only dry, nonconductive pollution occurs.

The pollution has no effect. For example, a clean room or air-conditioned office environment.

• Pollution Degree 2: Normally only nonconductive pollution occurs. Temporary

conductivity caused by condensation is to be expected. For example, indoor environment.

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Safety Requirement

• Pollution Degree 3: Conductive pollution or dry nonconductive pollution that

becomes conductive due to condensation occurs. For example, sheltered outdoor environment.

• Pollution Degree 4: The pollution generates persistent conductivity caused by

conductive dust, rain, or snow. For example, outdoor areas.

Safety Class

Class 1 – Grounded Product

1.6 Care and Cleaning

Care

Do not store or leave the instrument where it may be exposed to direct sunlight for long periods of time.

Cleaning

Clean the instrument regularly according to its operating conditions.

1. Disconnect the instrument from all power sources.

2. Clean the external surfaces of the instrument with a soft cloth dampened with mild

detergent or water. Avoid having any water or other objects into the chassis via the heat dissipation hole. When cleaning the LCD, take care to avoid scarifying it.

CAUTION

To avoid damage to the instrument, do not expose it to caustic liquids.

WARNING

To avoid short-circuit resulting from moisture or personal injuries, ensure that the

instrument is completely dry before connecting it to the power supply.

1.7 Environmental Considerations

The following symbol indicates that this product complies with the WEEE Directive 2002/96/EC.

The equipment may contain substances that could be harmful to the environment or human health. To avoid the release of such substances into the environment and avoid harm to human health, we recommend you to recycle this product

appropriately to ensure that most materials are reused or recycled properly. Please contact your local authorities for disposal or recycling information.

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Page 23

Product Features

• Brand-new chipset "Centaurus" developed by RIGOL

• Ultra-low noise floor at 18 μV

• 12-bit vertical resolution

• Up to 800 MHz analog bandwidth, 4 analog channels, and 1 EXT channel

• Up to 4 GSa/s real-time sample rate

• Max. memory depth: 500 Mpts (optional)

• Min. vertical sensitivity: 100 μV/div

• Up to 1,500,000 wfms/s waveform capture rate with the UltraAcquire mode

• 10.1'' 1280*800 HD touch display

• User-friendly Flex Knobs, bringing smoother interaction

• Standard photoelectric encoder operating knobs, effectively prolonging its

service life

• Standard USB Device & Host, LAN, and HDMI interfaces

rms in minimum

[1]

• Optional battery pack in a highly portable package for unlimited freedom

• Support online version upgrade

DHO4000 series digital oscilloscope is designed to meet the designing, debugging, and testing requir brand-new chipset "Centaurus" developed by RIGOL, this series achieves a fast waveform capture rate of 1,500,000 wfms/s with the UltraAcquire mode, 500 Mpts memory depth, 12-bit vertical resolution, all combined with excellent noise floor performance and vertical accuracy to meet your requirements for more accurate measurements, bringing extraordinary T&M experience for you.

NOTE

[1]: 16 bits in High Resolution mode.

ements of the mainstream oscilloscope market. Adopting the

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Page 24

Document Overview

This manual gives you a quick overview of the front and rear panel, user interface as well as basic operation methods of DHO4000 series.

TIP

For the newest version of this manual, download it

Publication Number

UGA33101-1110

Software Version

Software upgrade might change or add product features. Please acquire the latest version of the manual to upgrade the software.

Format Conventions in this Manual

1. Key

The front panel key is denoted by the menu key icon. For example, indicates the "DEFAULT" key.

2. Menu

The menu item is denoted by the for Shading" in the manual. For example, the "Utility" function menu. You can click or tap Setup to access the "Setup" menu.

3. Operation Procedur

The next step of the operation is denoted by ">" in the manual. For example,

> Storage indicates first clicking or tapping and then clicking or tapping Storage.

4. The front/rear panel connect for example, [AUX OUT].

5. Knob

Label Knob Label Knob

or is denoted by "Brackets + Connector Name (Bold)",

mat of "Menu Name (Bold) + Character

Setup indicates the "Setup" sub-menu under

Horizontal POSITION

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Horizontal Position Knob

Multipurpose Knob 1

DHO4000 User Guide

Page 25

Document Overview

Label Knob Label Knob

Horizontal Scale

Horizontal SCALE

Vertical POSITION

Vertical SCALE

Content Conventions in this Manual

DHO4000 series digital oscilloscope includes the following models. Unless otherwise specified, this manual takes DHO4804 as an example to illustrate the basic operation methods of DHO4000 series.

Model Max. Analog Bandwidth Analog Channels

DHO4204 200 MHz 4

DHO4404 400 MHz 4

Knob

Vertical Position Knob

Vertical Scale Knob

LEVEL

- -

Multipurpose Knob 2

Trigger Level Knob

DHO4804 800 MHz 4

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Page 26

Quick Start

4.1 General Inspection

1. Inspect the packaging

If the packaging has been damaged, do not dispose the damaged packaging or

cushioning materials until the shipment has been checked for completeness and

has passed both electrical and mechanical tests.

The consigner or carrier shall be liable for the damage to the instrument resulting

from shipment. RIGOL would not be responsible for free maintenance/rework or

replacement of the instrument.

2. Inspect the instrument

In case of any mechanical damage, missing parts, or failure in passing the electrical

and mechanical tests, contact your sales representative.

3. Check the accessories

Please check the accessories according to the packing lists. If the accessories are

damaged or incomplete, please contact your sales representative.

Recommended Calibration Interval

RIGOL suggests that the instrument should be calibrated every 18 months.

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Quick Start

4.2 Appearance and Dimensions

Figure 4.1 Front View

Figure 4.2 Side View

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4.3 To Prepare for Use

4.3.1 Tilting the Oscilloscope for Easier Viewing

Flip out the tabs under the oscilloscope's rear feet to tilt the oscilloscope to stabilize it for easier operation and viewing. Flip in the tabs for storage or transporting when not using the instrument. Please see the figur

e below.

Quick Start

Figure 4.3 Flipping in/out Tabs

4.3.2 Connecting to Power

The power requirements of the oscilloscope are 100-240 V, 50-60 Hz. Please use the power cord provided in the accessories to connect the oscilloscope to the AC power source, as shown in the figure below.

Figure 4.4 Connecting to Power

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Quick Start

WARNING

To avoid electr

TIP

If the oscilloscope is equipped with batter

ic shock, ensure that the instrument is correctly grounded.

4.3.3 Turn-on Checkout

After the instrument is connected to the power source, press the power switch at the lower-lef up process, the instrument performs a series of self-tests. After the self-test, the splash screen is displayed.

• Restart: Click or tap

reboot?" is displayed. Click or tap

•

Shut

t corner of the front panel to power on the instrument. During the start-

down:

y pack, the battery will also be powered.

> Restart. Then a pr

o restart the instrument.

OK t

ompt message "Ar

ou sure to

e y

- Click or tap

shutdown?" is displayed. Click or tap

- Press the pow shutdown?" is displayed. Click or tap OK to shut down the instrument.

- Press twice to directly shut down the instrument.

- Press for three seconds to directly shut down the instrument.

TIP

You can also click or tap > Utility > Setup and select "Switch On

In this way, the instrument powers on once connected to power.

er switch

4.3.4 Replacing the Fuse

If you need to replace the fuse, please use the correct fuse (AC 250 V, T3.15 A; 5.2 mm×20 mm) and follow the steps shown below (see

> Shutdown. Then a prompt message "Are y

OK to shut down the instrument.

and a prompt message "Are you sure to

" in "Power Status" item.

Figure 4.5

ou sure to

1. Power off the instrument and remove the power cord.

2. Insert a small straight screwdriver into the slot at the power socket and pry out the

fuse holder gently.

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3. Remove the fuse.

Quick Start

4. Insert the pr

5. Re-insert the fuse holder into the power socket.

oper fuse into the fuse holder.

Figure 4.5 Replacing the Fuse

WARNING

To avoid electr

disconnected from the power before replacing the fuse. Also, please make sure the fuse is

consistent with the required fuse rating.

ic shock, please make sure that the instrument is powered off and

4.3.5 Setting the System Language

This oscilloscope supports multiple languages. You can click or tap > Utility > Setup > Language to select the system language.

4.3.6

Connecting Probes

RIGOL provides passive and active probes for DHO4000 series. For specific probe models, please refer to of the probes, please refer to the corresponding Probe User Guide.

Connect the Passive Probe

1. Connect the BNC terminal of the probe to an analog channel input terminal of the

oscilloscope on the front panel as shown in the figure below.

DHO4000 series Data Sheet

. For detailed technical information

2. Connect the ground alligator clip or spring of the probe to the circuit ground

terminal, and then connect the probe tip to the circuit point to be tested.

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Quick Start

Figure 4.6 Connecting the Passive Probe

After you connect the passive probe, check the probe function and probe compensation adjustment before making measurements. For details, please refer to

Function Inspection

Connect the Active Probe

Take PVA7250 (active differential probe) as an example.

1. Connect the probe head to the preamp of the active probe, as shown in the figure

below.

and

Probe Compensation

Figure 4.7 Connecting the Probe Head to the PA of the Active Probe

2. Connect the other end of the preamp t

oscilloscope on the front panel, as shown in the figure below. Note that you need to push the probe to the due position to lock it firmly.

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o an analog channel input terminal of the

Page 32

Quick Start

Figure 4.8 Connecting the Active Probe

3. Use the probe's auxiliary device to connect the probe head to the circuit under

test. For detailed information of the probes, please refer to

PVA7000 Series Active Probe

After connecting the active probe, you can perform probe calibration and offset voltage adjustment if necessary. For details, refer to descriptions about the active probe in this series User Guide.

4.3.7 Function Inspection

1. Press the front-panel and a prompt message "Restore default settings?"

is displayed. Click or tap OK to restore the instrument to its factory default settings.

2. Connect the ground alligat

Figure 4.9

3. Use the probe to connect the input terminal of CH1 and the "Compensation Signal

Output Terminal" of the probe, as shown in

User Guide for

or clip of the probe to the "Ground Terminal" as shown

Figure 4.9

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Quick Start

Figure 4.9 Using the Compensation Signal

4. Set the pr

5. Observe the wav

square waveform similar to the waveform shown in the figure below.

obe ratio b

> Auto.

ased on the att

eform on the display. In normal condition, you should see a

Figure 4.10 Square Waveform Signal

enuation of the probe, and then click or tap

6. Test the other channels in the same way. If y

wave is not shaped correctly as shown above, perform the procedure described in

Probe Compensation

WARNING

To avoid electr

the probe is in good condition. Do not touch the metallic part of the probe when the

probe is connected to high voltage source.

ic shock when using the probe, please make sure that the insulated wire of

. If you do not see the waveform, perform these steps again.

ou see the waveform, but the square

4.3.8 Probe Compensation

When used for the first time, the oscilloscope probe must be compensated to match the input characteristics of the oscilloscope channel t

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o which it is connected. A non-

Page 34

Quick Start

compensated or poorly compensated probes can introduce measurement inaccuracy or errors. The compensation pr

ocedure is as follows:

1. Perform step 1, 2, 3, and 4 in

2. Check the displayed waveforms and compare them with waveforms shown in the

figure below.

Figure 4.11 Probe Compensation

3. Use the probe compensation adjustment tool pr

the low-frequency compensation adjustment hole on the probe until the displayed waveform is consistent with the "Perfectly compensated" waveform shown in the figure above.

4.4 Product Overview

The following content provides a description of the front and rear panels as well as the user interface o

f the DHO4000 series by taking DHO4804 as an example.

Function Inspection

ovided in the accessories to adjust

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Quick Start

4.4.1 Front Panel Overview

Figure 4.12 Front Panel

1. 10.1-inch Capacitive Touch Screen

Displays the waveforms, menu labels, and parameter settings, system state, prompt messages, and other information.

2. Multipurpose Knobs

- Non-menu operation:

When not operating on the menu, y waveform brightness. When a cursor, decoding, Math waveform, or reference

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ou can r

e the knob 1 to adjust the

otat

Page 36

Quick Start

waveform is added on the screen, you can rotate the multipurpose knob to move the cursor (knob 1 and 2), adjust the decode thr decode result display position (knob 2), adjust the vertical scale (knob 1) and vertical offset (knob 2) of the math/reference waveform. You can click or tap

Flex Knob on the Toolb

- Automatic: Cursor > (Math/Ref/Decode) > Intensity (default priority).

ar at the upper-right of the screen to set priority.

eshold (knob 1) and

- Manual: all non-menu operation items are listed at the lower part of the Knob menu. You can select one of them as the curr

knob to adjust.

- Menu operation:

When operating on the menu, you can rotate the multipurpose knob 1/2 to adjust the value in the menu. When you click or tap an input field and then the

/ icon is displayed in the input field, it indicates that you can use multipurpose knob 1/2 to set the value. The LED indicat knob is illuminated. In this point, you can rotate the knob to adjust the value or press the knob to restore the parameter to the default value.

When using the virtual numeric keypad or drop-down list, you can rotate the knob to navigate through the keypad or drop-down list and press the knob to select an item.

3. Measure Key

Press waveform parameters in the menu. For details, please refer to

to access the Measure menu. You can set the source and select the

ent item for multipurpose

or of the corresponding

Measurements

Flex

4. Cursor Key

Press to enable cursor measurements. The results are displayed in the rightside "Result" bar. Three cursor modes are available: Manual, Track, and XY; wherein, the XY mode is available only when the XY function is enabled.

5. Analyse Key

Press to access the Analyse menu in which you can access analysis features including digital voltmeter (DVM), count and pass/fail testing.

6. Touch Lock Key

Press touch screen function.

Common Tools Keys

once to disable the touch screen function; press it again to enable the

er, power analysis, waveform recording,

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Quick Start

- is the auto scale key. Press this key to enable the auto scale function.

The oscilloscope is automatically configured t adjusting the vertical scale, horizontal timebase, and trigger mode. To set up the key, please refer to

Auto Config

o best display the input signals by

"RUN" or "STOP". In "RUN" state, this k state, this key is illuminated in red.

trigger mode to "Single".

- is the default setup key. Press this key and a dialog box is displayed. Click or tap OK in the dialog to rest

the oscilloscope is in "RUN" mode, it continues to display new wavefor

8. Quick Action Key

Press setup, measure all, statistics reset, wav key, please refer to

9. Trigger Controls

is the RUN/STOP key. Press the key to set the oscilloscope's run state to

ey is illuminated in green; in "STOP"

is the key for a single acquisition. Press this key to set the oscilloscope's

ore the oscilloscope's default settings.

is the clear key. Press this key to clear all waveform on the display. If

ms.

to perform the selected quick action: print screen, save wave, save

eform record, or save group. To set up the

Quick Action Settings

- is the trigger setup key. Press this key to access the Trigger menu. For details, please refer to

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Triggering the Oscilloscope

Page 38

Quick Start

- is the trigger slope setup key. Press this key to select the edge type (rising edge, falling edge, or either edge). This key is not active when the trigger type is not set t

o "Edge".

- LEVEL is the trigger level/digital threshold knob. Turn the knob clockwise to

increase the trigger lev level. Pressing the knob can quickly set the trigger level to the waveform's 50% peak-to-peak value.

10. Vertical Controls

is the force trigger key. Press this key to force a trigger.

el or turn the knob counterclockwise to decrease the

- Vertical POSITION is the vertical position knob. T the selected waveform's vertical position to move the waveform up or down on the display. Press this knob to reset the vertical position to zero.

- Vertical

value of vertical divisions of the graticule in volts/div. Press this knob to toggle between fine and coarse adjustment of the vertical scale.

can add reference wav measured waveforms to identify circuit fault.

operations include A+B, A-B, A× B, A/B, FFT, et label.

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SCALE is the vertical scale knob. R

is the reference key. Press this key to assess the Ref menu, in which you

eforms in waveform view and compare them with

is the Math key. Press this key to access the Math menu. Math

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otate this knob to modify the

c. You can also set the Math

urn this knob to change

DHO4000 User Guide

Page 39

Quick Start

- / / / is the channel key. Depending on the actual situation, press the key t channel, as described below:

- If the channel is not displayed, you can press the channel key to open the

channel in the waveform view window.

- If the channel is displayed but not selected, you can press the channel key to

select the channel.

- If the channel is both displayed and selected, you can press the channel key

to close its display in the waveform view.

11. Horizontal Controls

o enable (display), select, or disable the corresponding

- Horizontal POSITION is the horizontal position knob. Turn the knob t change the horizontal position (trigger position) to move the waveforms horizontally. Press the knob to reset the horizontal position to default.

- Horizontal

horizontal time/div setting to compress or expand waveforms of all channels horizontally. Press this knob to toggle between fine and coarse adjustment of the horizontal scale.

Y depth, etc.

Zoom mode.

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DHO4000 User Guide

is the acquisition setup key. Press this key to access the Horizontal menu.

ou can set the oscilloscope

is the Zoom (delayed sweep) key. Press this key to enable or disable the

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SCALE is the horizontal scale knob. Turn the knob t

s time base mode, acquisition mode, memory

o change the

Page 40

Quick Start

- is the Navigate key. Press this key to access the Navigation menu. You can navigate time, search ev

Navigation

ents, or segments. For details, please refer to

12. Probe Compensation Signal Output T

This terminal outputs the probe compensation signal which helps you match a probe's input capacitance to the oscilloscope channel to which it is connected. For details, please refer to

13. Analog Channel Input Terminals

Attach probes to these connectors for analog signal inputs.

14. USB HOST Port

This series supports the flash memory USB storage device of FAT32 format and USB-GPIB module.

- USB storage device: imports or exports data (software update, waveform, setup, or captured image).

- USB-GPIB module: extends the GPIB interface for RIGOL instruments that integrates the USB HOST interface but not the GPIB interface.

15. Power Switch

are the navigation keys.

erminal/Ground Terminal

Probe Compensation

Press the switch to power on/off the oscilloscope.

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Quick Start

4.4.2 Rear Panel Overview

1. AUX OUT

- Trigger output:

When the AUX output is set to "TrigOut", the oscilloscope generates a trigger and outputs a signal that can reflect the current capture rate of the oscilloscope via this interface. Connect the signal to a waveform display device and measure the frequency of the signal. The measurement result is the same as the current capture rate.

Figure 4.13 Rear Panel

6 7

- Pass/Fail:

When the AUX output is set to "PassFail", in the pass/fail test, the instrument will output a pulse via the [AUX OUT] connector when a passed or failed waveform is detected during the pass/fail test.

2. EXT TRIG

BNC connector to input external trigger signal for the oscilloscope.

3. 10 MHz REF IN

BNC connector to input external reference clock signal.

4. 10 MHz REF OUT

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Quick Start

BNC connector that can output the 10 MHz clock signal generated by the internal crystal oscillator inside the instrument.

Snap-fit Grooves for Battery Pack

The rear-panel grooves for the battery pack to snap into.

6. HDMI

You can connect the instrument to an external display that has the HDMI interface (e.g. monitor or projector) via this interface to better observe the waveform display clearly. At this time, you can also view the waveforms on the LCD of the instrument.

7. USB DEVICE

Connect the instrument to the PC via this interface. Then you can use the PC software Ultra Scope to send the SCPI commands or use the user-defined programming to control the instrument.

8. LAN

Connect the instrument to network via this interface. The instrument conforms to LXI CORE 2011 DEVICE instrument standard. Its test system can be built quickly. Then you can control the instrument through using Web Control to send the SCPI commands to control the instrument. When update is available, you can perform online upgrading for the system software of the instrument via the LAN interface.

9. AC Power Cord Connector

The power requirements of the instrument are 100 V to 240 V, 50 Hz to 60 Hz. Please use the power cord provided in the accessories to connect the instrument to the AC power source.

10. Fuse

If you need to replace the fuse, use only the specified fuse.

11. Battery Pack Connector

Open the slider to connect the battery pack.

12. Security Lock Hole

Use a standard PC/laptop lock cable to secure the oscilloscope to a work bench or other location.

13. Snap-in Slots for Battery Pack

The slots for the battery pack to snap its feet into.

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Quick Start

4.4.3 User Interface Overview

Figure 4.14 User Interface

1. Wav

2. Run S

3. Horizontal Timebase Label

4. Sample Rate & Memory Depth Label

5. Horizontal Delay Label

eform View

Displays the measurement waveform window for CH1-CH4. Click or tap

upper-right corner o the configuration menu of the specified function.

tate Label

Displays the operating status of the instrument.

Displays the current horizontal time base. Click or tap this label to enter the horizontal setting menu.

Displays the current sample rate and memory depth. Click or tap this label to enter the horizontal setting menu.

f the window to close the window; click or tap

at the

to enter

Displays the current horizontal position. Click or tap this label to enter the horizontal setting menu.

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6. Trigger Label

Quick Start

- Displays the trigger information of the syst trigger level, trigger mode, and etc.

- Click or tap the trigger label, then the trigger setting window is displayed. You can set the parameters for the trigger.

7. Function Toolbar

Provides keys in the function navigation menu.

Result Sidebar

Displays the measurement results and statistics of various functions. Click or tap

9. Notification Area

Displays USB icon, L and time. You can click or tap this area to open the "Utility" menu.

- USB storage device icon: When a USB storage device is detected,

STOP/RUN, XY, Default, Flex Knob, Navigate keys and some function

at the lower-right corner of the screen to open or close the "Result" sidebar.

AN icon, the sound icon, remote control icon as well as data

em, including the trigger type,

will be

display

- L

- Sound icon: In the "Utility" menu, click or tap Setup > Beeper to enable or

disable the sound. When on, will be displayed; when off, will be displayed. You can simply click or tap the icon t

- Remote control icon: When you use Web Control to control the instrument

remotely,

- Date and time: displays the system date and time. For how to set the data and time, please refer to

10. Split-screen Display

If you enable multiple functions, multiple windows can be displayed on the screen at one time.

11. Math Labels

Displays the on/off state, operation type, and vertical scale.

ed.

AN icon: When the L

will be displayed.

AN interface is successfully connected,

o enable or disable the sound.

Display Date and Time

is displayed.

12. Channel Labels

- Display the on/off status of CH1~CH4.

- Display the channel coupling mode.

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Quick Start

- Display the vertical scale.

- Display the v

13. Function Navigation Icon

Click or tap the icon to open the function navigation menu in which you can access the specified function menu by clicking or tapping the corresponding function key.

ertical offset.

4.5 Touch Screen Gestures

The instrument's large capacitive touch screen makes operation and configuration easy and flexible. The highly sensitive user inter waveform display capability, bringing an extraordinary user experience. The actions supported by the touch screen controls include tapping, pinching&stretching, as well as dragging.

4.5.1 Tap

Use one finger to tap the symbol or characters on the screen slightly, as shown in

Figure 4.15

. With the Tap gesture, you can perform the following operations:

face designed for touch has a strong

• Tap the menu displayed on the screen to operate on the menu.

• Tap the function navigation icon at the lower-left corner of the touch screen to

enable the function navigation.

• Tap the displayed numeric keypad to set the parameters.

• Tap the virtual keypad to set the filename.

• Tap the close button at the upper-right corner of the message box to close the

prompt window.

• Tap other windows on the touch screen and operate on the windows.

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4.5.2 Pinch&Stretch

Pinch or stretch two points on the screen with two fingers to zoom in or out the waveform. T fingers; to zoom out the waveform, first stretch the two fingers, and then pinch the fingers together, as shown in the figure below. With the pinch&stretch gesture, you can perform the following operation:

o zoom in the waveform, first pinch the two fingers and then stretch the

Quick Start

Figure 4.15 Tap Gesture

• Pinching&stretching in the horizontal direction can adjust the horizontal time

base of the waveform.

• Pinching&stretching in the vertical direction can adjust the vertical scale of the

waveform.

4.5.3 Drag

Figure 4.16 Pinch&Stretch Gesture

Use one finger to select the object, and then drag the object to a destination place, as shown in the figure below. With the drag gestur operation:

• Drag the waveform to change its position or scale.

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e, you can perform the following

DHO4000 User Guide

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Quick Start

• Drag the window controls to change the position o

keypad).

• Drag the cursor to move the cursor.

• Drag the trigger cursor to change the trigger level.

• In multi-window display, drag one of the displayed windows to change its

position on the display.

f the window (e.g. numeric

Figure 4.17 Drag Gesture

4.6 Parameter Setting Method

For this instrument, you can use the knobs and touch screen to set parameters. The common parameter setting methods ar

• Method 1: Some parameters can be adjusted by rotating the front-panel knobs.

• Method 2: Click or tap the input field of a specified parameter, then a virtual

keypad is displayed. Complete the parameter setting with the keypad.

Input Chinese and English Characters

When naming a label, this instrument supports Chinese/English input method. The following part introduces how to input Chinese and English characters with the Chinese/English input method.

• Input English Characters

e as follows:

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Quick Start

Figure 4.18 English Input Interface

1. Select English input method

First check the input method type. If it shows "En/中", then go to Step 2; if it shows "中/En", click or tap the input method switchover key to switch to "En/ 中" (English input method).

2. Clear the name input area

If there is no character in the "Name Input Area", please go to the next step. If there are characters in the "Name Input Area", click or tap the Backspace key to delete all the characters from the "Name Input Area" in order.

3. Input the upper-case letter

If you want to input an upper-case letter, first use the Caps key to switch between the upper-case and lower-case mode. If the Caps key is selected, input the upper-case letter with the virtual keypad. If not, first click or tap the Caps key to ensure it is selected, then input the upper-case letter. All the input letters will be displayed in the "Name Input Area".

4. Input the lower-case letter

Refer to the operation specified in the previous step. If the Caps key is not selected, directly input the lower-case letter.

5. Input numbers or symbols

If the letter keypad is displayed, you need to click or tap the numeric switchover key to switch to the numeric keypad, and input numbers or

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Quick Start

symbols with the numeric keypad. All the input letters will be displayed in the "Name Input Area".

6. Modify or delet

During the name input process, you can modify or delete the unwanted character if necessary. To delete the characters that have been input, click or tap the Backspace key in the virtual keypad to delete the characters. To modify the characters that have been input, delete the unwanted characters first and then input the new characters.

You can directly move the cursor to the character to be modified or deleted, delete the desired character or input the new characters after deleting the unwanted character.

7. Confirm the input

After completing the input operation, click or tap "OK".

• Input Chinese Characters

e the unwanted characters that have been input

Figure 4.19 Chinese Input Interface

1. Select Chinese input method

First check the input method type. If it shows "中/En shows "En/中", click or tap the input method switchover key to switch to "中/En" (Chinese input method).

2. Clear the name input area

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", then go to Step 2; if it

Page 50

Quick Start

If there is no character in the "Name Input Area", please go to the next step. If there are charact to delete all the characters from the "Name Input Area" in order.

If there are characters in the "Pinyin Input Area", when you delete characters from the name input area, the characters in the Pinyin input area will be deleted first.

3. Input Chinese characters

Click or tap the characters in the virtual keypad to input Pinyin into the input area, then the characters to be selected will be displayed in the Chinese character selection area. Slide to view more Chinese characters for you to choose. Select the desired Chinese character, and then the selected character will be displayed in the input area.

4. Modify or delete the unwanted characters that have been input

ers in the "Name Input Area", click or tap the Backspace key

5. Confirm the input

After completing the input operation, click or tap "OK".

Input a String

When naming a file or folder, you need to input a string with the keypad.

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Quick Start

Figure 4.20 String Keypad

1. Clear the name input area

If there is no charact there are characters in the "Name Input Area", click or tap the Backspace key to delete all the characters from the "Name Input Area" in order.

2. Input the upper-case letter

If you want to input an upper-case letter, first use the Caps key to switch between the upper-case and lower-case mode. If the Caps key is selected, input the uppercase letter with the virtual keypad. If not, first click or tap the Caps key to ensure it is selected, then input the upper-case letter. All the input letters will be displayed in the "Name Input Area".

3. Input the lower-case letter

Refer to the operation specified in the previous step. If the Caps key is not selected, directly input the lower-case letter.

4. Input numbers or symbols

er in the "Name Input Area", please go to the next step. If

If the letter keypad is displayed, you need to click or tap the numeric switchover key to switch to the numeric keypad, and input numbers or symbols with the numeric keypad. All the input letters will be displayed in the "Name Input Area".

5. Modify or delete the unwanted characters that have been input

During the name input process, you can modify or delete the unwanted character if necessary. To delete the characters that have been entered, click or tap the

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Quick Start

Backspace key in the virtual keypad. To modify the characters that have been input, delete the unwanted charact

You can directly move the cursor to the character to be modified or deleted, delete the desired character or input the new characters after deleting the unwanted character.

6. Confirm the input

After completing the input operation, click or tap "OK".

Input a Value

When setting or modifying a parameter, you can input an appropriate value with the numeric keypad.

• Input a value or unit in the keypad using the touch screen.

• You can also rotate the multipurpose knob (1 or 2) to move the cursor and select

the desired value and unit. Then press the knob to input the selected value or unit.

ers first and then input the new characters.

Figure 4.21 Numeric Keypad

After y turned off automatically. This indicates that you have completed parameter setting. Besides, after you have input the values, you can also press "OK" directly to close the numeric keypad. At this time, the unit of the parameter is the default unit. In the numeric keypad, you can perform the following operations:

• Delete the parameter value that has been input;

• Set the parameter value to a maximum or minimum value;

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ou input all the values and select the desired units, the numeric keypad is

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Quick Start

• Set the parameter t

• Clear the parameter input field.

o a default value.

4.7 Using the Security Lock

If necessary, you can lock the instrument to a fixed location by using the security lock (please purchase it by your

The method is as follows: align the lock with the lock hole and plug it into the lock hole vertically, turn the key clockwise to lock the oscilloscope, and then pull the key out.

self), as shown in the figure below.

Figure 4.22 To Use the Security Lock

NOTE

Please do not insert other objects into the security lock hole t

instrument.

o avoid damaging the

4.8 Accessing the Built-in Help System

The built-in help system provides instructions for all the front-panel keys and their

corresponding menu keys. Click or tap > Help to access the "Help" menu.

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Quick Start

After that, you can get its help information by clicking on or tapping the link for the desired item.

4.9

Viewing the Option Information and Install the Option

This series oscilloscope provides multiple options to fulfill your measurement requirements. If you need any of these options, order them according to the Order No. available in " according to this section. Besides, you can also view the option installation status or activate the newly purchased option.

View the installed option

The instrument is installed with the trial versions of the options before leaving factory. The trial time starts from the time when you power on the instrument for the first time, and the trial time is about 2,160 minutes. Perform the following operations to view the name of the installed option and option installation status.

• Click or tap the function navigation icon screen, and then select Utility to enter the utility function menu.

• Click or tap Options to view the option list.

Install the option

Appendix A: Options and Accessories

", and then install the options

at the lower-left corner of the

The option license is a string of fixed characters. The license file should be in specific format, with the filename extension ".lic". After you purchase an option, you will obtain a key (used for obtaining desired the option license code). Then, you can install the option according to the following steps.

1. Obtain an option license

a. Log in to the RIGOL, click SERVICE CENTRE >

the "Registered product license code" interface.

b. In the software license registration interface, input the correct key, serial

number (click or tap > Utility instrument), and v license.

Install the option

Sending the SCPI commands (:SYSTem:OPTion:INSTall <license>) to install options is supported. For details, refer to

TIP

• During the installation process, you are not allowed to power off the instrument.

• Sending the SCPI commands (:SYSTem:OPTion:INSTall <license>) to install options is

supported. Installing options by using the USB storage device or inputting the license code manually is not supported.

erification code. Then click Generat

About

DHO4000 Programming Guide

License Activation to enter

to obtain the serial number of the

e t

o obtain the option

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Vertical System

This series oscilloscope provides 4 analog input channels (CH1-CH4), and each channel is equipped with an independent vertical contr methods for their vertical systems are the same. This chapter takes CH1 as an example to introduce the setting method for the vertical system.

When a channel is selected, click or tap the channel status label at the bottom of the screen. Then the menu as shown in the figure below is displayed.

ol system. The setting

Figure 5.1 Vertical Menu

5.1 To Enable or Disable the Analog Channel

Enable the Analog Channel

When a signal is connected to CH1, y

• Click or tap the channel status label at the bottom of the screen to enable the

channel.

• Press the front-panel key

key is illuminated.

• In

When CH1 is activated, its status label at the bottom of the screen is as shown in the figure below.

Vertical System

switch t

o turn CH1 on or off.

menu, select the CH1 tab. Click or tap the

ou can enable the channel in the following ways.

to enable the channel, and the backlight of this

Display on/off

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Vertical System

The information displayed in the channel status label is related to the current channel setting (irrelevant with the on/o on, you can modify the parameters such as the vertical scale, horizontal time base, trigger mode, and trigger level according to the input signal for easy observation and measurement of the waveform.

When CH1 is enabled but not activated, its status label is as shown in the following figure.

ff status of the channel). After the channel is turned

Click or tap the channel status label at the bottom of the screen or press the front-

panel key to activate CH1. You can also select the CH1 tab in Vertical menu t activate it.

Disable the analog channel

You can disable the analog channel in the following ways.

• If CH1 has been enabled and activated, you can press

to disable it directly bottom of the screen to open the Vertical menu and then click or tap the label again to disable the channel.

• If CH1 has been enabled but not activated, first activate the channel. Then press

the front-panel key

• In

• In addition, you can slide down the channel label to disable the channel.

Vertical System

. You can also click or tap the channel status label at the

or use the channel status label to disable CH1.

menu, set Display to OFF to disable CH1.

on the front panel

If CH1 is disabled, its status label is as shown in the figure below.

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5.2 To Adjust the Vertical Scale

Vertical scale indicates the voltage value per grid in the vertical axis of the screen. It is oft

en expressed in V/div. Adjusting the vertical scale increases or decreases the display amplitude of the waveform. The scale information of the channel status label at the bottom of the screen would change accordingly.

The adjustable range of the vertical scale is related to the current probe ratio and input impedance. By default, the probe ratio is 1X, and the input impedance is 1 MΩ. In this case, the adjustable range of the vertical scale is 100 μV/div to 10 V/div.

When CH1 is turned on and activated, you can adjust the vertical scale in the following ways.

Vertical System

• Rotate the Vertical SCALE knob to adjust the ver

reduce the scale and counterclockwise to increase).

• Enable the touch screen function, and then adjust the vertical scale with the

pinch & stretch gesture on the touch screen. For details, refer to descriptions in

Pinch&Stretch

• In the Vertical menu, click or tap the icon at the right side of the input field of

Scale to increase or decrease the scale value or use the corresponding multipurpose knob on the front panel to set the value. You can also click or tap the input field to input a specific value with the displayed numeric keypad.

In the Vertical menu, click or tap the Fine on/o adjustment) and OFF (co

ff switch to toggle between

arse adjustment). The default setting is OFF. You can also

tical scale (clockwise to

ON (fine

ess the V

pr adjustment".

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ertical

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SCALE knob t

oggle betw

o t

een "coarse adjustment" and "fine

DHO4000 User Guide

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Vertical System

• Fine adjustment: Use the icons at the right side of Scale or rotate the knob to

further adjust the v vertical resolution. If the amplitude of the input waveform is a little bit greater than the full scale under the current scale but a little bit lower if the next scale is used, fine adjustment can be used to improve the amplitude of waveform display to view signal details.

ertical scale within a relatively smaller range to improve

• Coarse adjustment: Use the icons at the right side of

adjust the ver μV/div, 1 mV/div, 2 mV/div, 5 mV/div, 10 mV/div...10 V/div.

tical scale in a 1-2-5 step sequence, i.e. 100 μV/div, 200 μV/div, 500

5.3 To Adjust the Vertical Offset

Vertical offset indicates the offset of the signal ground level position of the waveform from the ver amplitude unit (refer to moves the corresponding channel's waveform up and down. The vertical offset information (as shown in the following figure) in the channel status label at the bottom of the screen will change accordingly.

The adjustable range of the vertical offset is related to the current input impedance, probe ratio and ver

tical center of the display. Its unit is consistent with the currently selected

To Specify the Amplitude Unit

tical scale.

Scale or rotate the knob to

). Adjusting the vertical offset

When CH1 is turned on and activated, you can adjust the vertical offset in the following ways.

• Rotate the Vertical

adjust the vertical offset within the adjustable range. Rotate this knob clockwise to increase the vertical offset or rotate it counterclockwise to reduce the vertical offset. Pressing the knob can quickly reset the vertical offset (set the vertical offset to 0).

• Enable the touch screen function, and then adjust the vertical offset with the

drag gesture. For details, refer to

• In

Vertical menu, click or tap the Up/Down arrow icon at the right side of the

input field of Offset to increase or decrease the offset value or use the corresponding multipurpose knob t input field to input a specific value with the displayed numeric keypad.

POSITION knob at the right section of the front p

Drag

o set the value. You can also click or tap the

anel to

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5.4 To Specify Channel Coupling

You can remove unwanted signals by setting the coupling mode. For example, the signal under t

est is a squar

e wav

eform with DC offset.

Vertical System

Click or tap the channel status label at the bottom of the screen. Then the menu is display mode.

• When the coupling mode is "DC", both the DC and A

under t

• When the coupling mode is "AC", the DC components of the signal under test

are blocked.

• When the coupling mode is "GND", the DC and AC components of the signal

under test are blocked.

After a coupling mode is selected, it is indicated in the channel status label at the bottom of the screen, as shown in the figure below.

ed. Click or tap the

est can pass the channel.

Coupling dr

op-down butt

C components o

on t

o select the coupling

Vertical

f the signal

TIP

When the input impedance is set to "50 Ω", the channel coupling is set t

force. The

5.5

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To Specify Bandwidth Limit

This series oscilloscope supports the bandwidth limit function. Setting the bandwidth limit can reduce the noises in the displayed wav test is a pulse with high frequency oscillation.

Coupling menu item is grayed out and cannot be modified.

eforms. For example, the signal under

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o DC coupling by

DHO4000 User Guide

Page 60

Vertical System

Click or tap the channel status label at the bottom of the screen, and then the Vertical menu is displayed. Click or tap the BW Limit drop-down button to select the specified bandwidth. When the bandwidth limit is enabled, the specific bandwidth limit value will be displayed in the channel status label at the bottom of the screen, as shown in the figure below.

• When the bandwidth limit is turned o

ff, the high frequency components of the

signal under test can pass the channel.

• When the bandwidth limit is turned on, the high frequency components found in

the signal under test that are greater than the limit are attenuated. The table below lists the available bandwidth limits for different models.

Table 5.1 Bandwidth Limit

Model Available Bandwidth Limits

DHO4404/DHO4804 20 MHz, 250 MHz

DHO4204 20 MHz

TIP

• For DHO4404 and DHO4804

can only set the bandwidth limit to 20 MHz or 250 MHz, but cannot turn off the limit;

when the vertical scale is less than or equal to 200 μV, the bandwidth limit is fixed to 20

MHz.

, when the vertical scale is less than or equal to 500 μV, you

• When the vertical scale is decreased to 500 μV from above 500 μV, the 250 MHz

bandwidth limit is automatically enabled; once decreased to 200 μV, the 20 MHz

bandwidth limit will be automatically enabled. In this case, when the vertical scale is

adjusted to 500 μV, the 250 MHz bandwidth limit will be enabled. When the vertical scale

is adjusted to above 500 μV, the bandwidth limit is automatically disabled.

TIP

Bandwidth limit can not only reduce the noise, but also can attenuat

frequency components of the signal.

e or eliminate the high

5.6 To Specify Input Impedance

To reduce the circuit load between the oscilloscope and the circuit under test, this oscilloscope provides two input impedance modes: 1 M

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Ω (default) and 50 Ω. In the

Page 61

Vertical System

Vertical menu, click or tap the Impedance button to t Ω".

• 1 MΩ: In this mode, the input impedance of the oscilloscope is ver

the current flowed from the circuit under test can be ignored.

• 50 Ω: It makes the oscilloscope match with the device whose output impedance

is 50 Ω.

After the oscilloscope switches to the 50 Ω mode, the circuit diagram in the menu will also be changed, as shown in the figure below.

oggle between "1 MΩ" and "50

y high, and

Vertical

Figure 5.2 Switched Input Impedance

TIP

• After the oscilloscope recognizes the probe automatically, the input impedance will also

be auto recognized to save you from configuring it manually.

• Setting the input impedance affects the ranges of vertical scale and offset for the

specified channel.

5.7 To Invert a Waveform

Click or tap the channel status label at the bottom of the screen, and then the Vertical menu is displayed. Then click or tap the Invert on/off switch to enable or disable the waveform invert function.

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Vertical System

When "ON" is selected, the channel label is as shown in the figure below.

When the Invert function is disabled, the waveform is displayed normally; when enabled, the voltage values of the displayed waveform are inverted, as shown in the figure below. Inverting a waveform also changes the result of math function, waveform measurement, etc.

"Invert" Off

TIP

When the Invert function is tur

trigger) edge or polarity will be changed.

5.8 To Set Probe

The analog channel of this oscilloscope supports both passive and active probes. It can automatically recognize the curr For detailed technical information of the probes, please refer to the corresponding Probe User Guide.

Click or tap the channel status label at the bottom of the screen. Then the menu Vertical is displayed. Then click or tap Probe to enter the Probe setting menu, as shown in the figure below.

"Invert" On

Figure 5.3 Waveform Invert On/Off

ned on, the trigger (e.g. Edge trigger, Pulse trigger, or Slope

ently connected probe type and its probe ratio.

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Vertical System

Figure 5.4 Probe Setting Menu

If the instrument works with RP7000/PVA7000 series pr menu is as shown in the figure below. The probe ratio cannot be modified and you need to calibrate the probe. For specific probe models, please refer to

Sheet

. For detailed technical information of the probes, please refer to the

corresponding Probe User Guide.

obes (e.g. PVA7250), the probe

DHO4000 Data

Figure 5.5 Active Probe Setting Menu

Probe Ratio

The oscilloscope allows you t accurate measurement results, you must set the probe ratio properly. By default, the probe ratio is 1X.

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o set the probe attenuation manually. To obtain the

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Vertical System

Table 5.2 Probe Ratio

The probe ratio values available are as shown in the following table.

Attenuation

0.001X

0.002X

0.005X

0.01X

0.02X

0.05X

0.1X

0.2X

0.5X

1X (default)

(display amplitude of the signal: actual amplitude of the signal)

0.001:1

0.002:1

0.005:1

0.01:1

0.02:1

0.05:1

0.1:1

0.2:1

0.5:1

1:1

2:1

5:1

10X

20X

50X

100X

200X

500X

1000X

2000X

5000X

10000X

20000X

50000X

10:1

20:1

50:1

100:1

200:1

500:1

1000:1

2000:1

5000:1

10000:1

20000:1

50000:1

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TIP

Vertical System

The oscilloscope auto-recognizes cer

probe ratio will also be auto recognized to save you from configuring it manually.

Skew

The difference in the delays between the pr cable-delay errors in measurement results. To eliminate this problem, this series oscilloscope provides the deskew function. Click or tap the delay time with the pop-up numeric keyp numeric keypad to set the value. The value ranges from -100.00 ns to 100.00 ns, and the default is 0.00 s.

Bias

The oscilloscope provides offset adjustment function for active probes. This function is used to adjust the signal under test which is outside the probe amplifier input range to a proper range so as to ensure the signal integrity. When working with the RP7000/PVA7000 series probe, you can click or tap the input field of bias voltage o

Probe Information

f the probe.

tain probes with a fixed attenuation ratio. After that, the

obes, known as skew, can cause great

Skew input field to set the

ad. You can also use the corresponding

Bias to set the

After the oscilloscope recognizes the probe automatically, you can view information about the currently connected probe in the probe menu, such as the vendor, model, serial number, and the last calibration time.

Go Back to the Vertical Menu

In the

Probe setting menu, click or tap Vertical to go back to the Vertical menu.

5.9 To Specify the Amplitude Unit

Click or tap the channel status label at the bottom of the screen, and then the Vertical menu is displayed. Click or tap the Unit drop-down button to select W, A, V, or U. The default unit is V.

Changing the amplitude unit also changes the units of the functions related to the channel accordingly.

5.10

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To Adjust Bias

When you use an oscilloscope to make actual measurements, a small offset that arises from the temperatur

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Page 66

Vertical System

may occur on the zero-cross voltage of the channel, which will affect the measurement results o set an offset calibration voltage for calibrating the zero point of the corresponding channel so as to improve the accuracy of the measurement results.

f the vertical parameters. This series oscilloscope allows you to

Click or tap the Up/Down arrow icon at the right side of the input field of increase or decr value with the pop-up numeric keypad. You can also use the corresponding multipurpose knob to set the value.

The range of bias is related to the input impedance and the vertical scale.

TIP

If the zero-cross v

adjustable null range, please perform self-calibration for the instrument to ensure the

measurement accuracy. For details, please refer to

ease the bias value. You can also click or tap the input field to set the

oltage of the channel has a larger amplitude offset that exceeds the

5.11 To Specify the Skew

SelfCal

Bias to

When using an oscilloscope for actual measurement, the transmission delay of the probe cable may bring relativ allows you to set a delay time for calibrating the zero offset of the corresponding channel. Zero offset is defined as the offset of the crossing point of the waveform and trigger level line relative to trigger position, as shown in the figure below.

ely greater errors (zero offset). This series oscilloscope

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Figure 5.6 Zero Offset

Vertical System

In the "Vertical" menu, click or tap the Ch-Ch Skew input field to set the channel-tochannel sk

0.00 s.

ew time. The available range is from -100 ns to 100 ns, and the default is

5.12 To Turn the Channel Label Display On/Off

The instrument uses the channel number to mark the corresponding channel by

default. For ease of use, you can also set a label for each channel. For example, .

Click or tap the channel status label at the bottom of the screen. Then the Vertical menu is displayed. Click or tap the Label on/off switch to turn the label display on or off. You can also click or tap the label input field to input a specific name for the channel label with the pop-up keypad.

For how to use the keypad, please refer to descriptions in

Parameter Setting Method

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Horizontal System

You can access the Horizontal menu in the following ways.

• Press the front

• Click or tap the channel status label at the bottom of the scr

Vertical menu is displayed. Click or tap the Acquisition button t Horizontal menu.

• Click or tap the horizontal time base label ("H" icon), acquisition label ("A" icon),

or horizontal position label ("D" icon) at the top o Horizontal menu.

-panel

key to enter the Horizontal menu.

een. Then the

o enter the

f the screen to enter the

Figure 6.1 Horizontal Menu

6.1 To Adjust the Horizontal Time Base

Horizontal time base, also called the horizontal scale, refers to the time of each grid in the horizontal direction of the scr horizontal time base is from 500 ps/div to 1.00 ks/div.

While you change the horizontal time base, the displayed waveforms of all channels are expanded or compressed horizontally relative to the selected time reference

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een. It is usually expressed in s/div. The range of the

Page 69

Horizontal System

(

Horizontal Expansion Reference

base label ("H" icon) will change accordingly, as shown in the figure below.

You can adjust the horizontal time base in the following ways.

). The horizontal time base in the horizontal time

• R

• Enable the touch screen function, and then adjust the horizontal time base with

• In the

In the Horizontal menu, you can click or tap the Vernier on/off switch to toggle between ON (fine adjustment) and OFF (co

front-panel Horizontal "fine adjustment".

e the fr

otat

ase (clockwise t

the Pinch&Stretch gesture. For details, refer to

Scale t multipurpose knob t input a specific value with the displayed numeric keypad.

ont-panel Horizontal

o reduce the scale and counterclockwise to increase).

Horizontal menu, click or tap the icon at the right side o

o increase or decrease the horizontal time base or use the corresponding

o set the v

SCALE knob to toggle betw

alue. You can also click or tap the input field to

SCALE

arse adjustment). You can also press the

knob to adjust the horizontal time

Pinch&Stretch

een "coarse adjustment" and

f the input field o

• Coarse adjustment: Click or tap the icons at the right side of the input field of

Scale to adjust the horizontal time base of the waveforms of all channels in a

1-2-5 step sequence within the adjustable range.

•

Fine adjustment: Click or tap the icon at the right side of the input field of

to adjust the horizontal time base o step within the adjustable range.

f the waveforms of all channels at a smaller

Scale

6.2 To Adjust the Horizontal Position

Horizontal position, also called trigger position, refers to the trigger point position of the waveforms of all channels in the horizontal direction relative to the center of the display. When the waveform trigger point is at the left (right) side of the center, the horizontal position is a positive (negative) value.

Changing the horizontal position moves the waveform trigger points and the displayed waveforms of all channels horizontally. The horizontal position displayed in

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Page 70

Horizontal System

the horizontal position label ("D" icon) changes accordingly, as shown in the figure below.

You can adjust the horizontal position in the following ways.

• R

• Enable the touch screen function, and then adjust the horizontal position with

• In the "Horizontal" menu, use the corresponding multipurpose knob to set the

otat

e the Hor

to adjust the horizontal position within the adjustable range. Rotate this knob clockwise to reduce the horizontal position or counterclockwise to increase the horizontal position. Pressing the knob can quickly reset the horizontal position (set the horizontal position to 0).

the drag gesture. For details, refer to

horizontal position or use the icons at the right side of the input field of to increase or decr or tap the

eypad.

izontal

ease the value, as shown in the figure below. You can also click

Position input field t

POSITION knob at the right section of the front p

Drag

o input a specific v

anel

Position

alue with the pop-up numeric

6.3 Zoom Mode (Delayed Sweep)

Zoom (delayed sweep mode) can be used to horizontally expand a length of waveform t on/off switch t you can set the scale and position in Zoom mode.

• Zoomed Scale: Rotat

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o view waveform details. In the

o enable or disable the delayed sweep function. When it is enabled,

e the corresponding multipurpose knob or use the icons at

the right of the

Scale input field to increase or decr

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Horizontal menu, click or tap the Zoom

ease the time base for the

Page 71

Horizontal System

Zoom window. You can also click or tap the input field to input the specific value directly via the pop-up numeric keypad.

•

Zoomed Position: Rotate the corresponding multipurpose knob or use the icons

at the right of the the Zoom window

Position input field to increase or decrease the position for

. You can also click or tap the input field to input the specific

value directly via the pop-up numeric keypad.

When the Zoom mode is enabled, the display divides in half, as shown in the figure below.

Figure 6.2 Zoom Mode

• Waveform before expansion:

The upper portion of the display that is not covered by subtransparent gray shows the normal display of the waveform. Its horizontal time base (called the main time base) is indicated in the label at the upper-left corner of the display. You can move the area left and right by adjusting the horizontal position and increase or decrease the size of the area by adjusting the horizontal scale.

• Waveform after expansion:

The lower portion shows the horizontally expanded version of the normal waveform display. Its horizontal time base (called the zoomed time base) is displayed in the middle. Compared with the main time base, the zoomed time base has higher horizontal resolution.

TIP

The zoomed time base should be smaller than or equal to the main time base.

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Acquisition System

The "Horizontal" menu allows you to configure the instrument's acquisition system.

Figure 7.1 Horizontal Menu

7.1 Acquisition Mode

The acquisition mode is used to determine how the waveform points are calculated from the sample points. In the Horizontal menu, click or tap the desired acquisition mode for the Acquisition item. This oscilloscope provides fiv Normal (default), Average, Peak, High Res, and UltraAcquire. The selected acquisition mode is indicated in the acquisition label ("A" icon) at the top of the screen.

Normal

In Normal acquisition mode, the oscilloscope samples the signal at a fixed time inter

val to rebuild the waveform. This mode produces the best display for most

waveforms.

Average

In this mode, the oscilloscope averages the waveforms from multiple acquisitions to reduce the random noise of the input signal and increase the vertical resolution. A greater number of averages lowers the noise and increases the vertical resolution. On the other hand, the higher the number of averages, the slower the response of the displayed waveform to waveform changes.

e acquisition modes:

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Acquisition System

When you select "Average" mode, click or tap the Averages input field to set the number of av multipurpose knob to set the value. Its range is from 2 (default) to 65,536.

TIP

The number of averages must be the Nth power of 2. When it is not in N power-of-2

increments, a prompt message "Truncation average error" is displayed. At this time, a value

that is smaller than the one you input and the closest to N power-of-2 increments will be input

automatically.

Peak

erages with the pop-up numeric keypad or use the corresponding

In this mode, the oscilloscope acquires the maximum and minimum values o

f the signal within the acquisition interval to get the signal envelope or capture narrow pulses that might be lost. This mode prevents signal aliasing at the expense of exaggerating the noise.

In this mode, the minimum pulse width detected is the sample period.

High Resolution

This mode uses a kind of ultra-sample technique to average sequential sample points to reduce the random noise on the input signal and generate much smoother waveforms on the screen. This is generally used when the sample rate of the digitizer is higher than the storage rate in acquisition memory.

When you select "High Res" mode, click or tap the

bits drop-down button to select

14 (default) or 16. The bandwidth of the selected bit is displayed behind the box.

TIP

• The averaging modes of the "A

"Multi-sample Average" and the latter uses "Single Sample Average".

• In "High Res" mode, the oscilloscope improves the measurement accuracy at the cost of

bandwidth. Each time the sample rate changes, the current bandwidth is indicated at the

right side of

bits in the menu.

verage" and "High Res" are different. The former uses

UltraAcquire

UltraAcquire mode is one of the fast acquisition modes. It divides the oscilloscope

's memory into segments and fills a memory segment for each individual trigger event. It provides a much higher waveform capture rate and helps minimize the dead time between trigger events.

When you select "UltraAcquire" mode, click or tap

Max Frames input field to set the

maximum number of frames and Timeout input field to set the timeout. When the number of the frames r

eaches the maximum or the sampling time reaches the

timeout, the oscilloscope stops sampling and plots the waveform. Click or tap the Display mode drop-down button t

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o select the display mode of the acquired data.

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Acquisition System

• Adjacent: Wavefor

m segments are shown in an adjacent way with each segment shown next to the previous segment in time order. A maximum of 100 frames can be displayed on the screen at a time in this mode.

• Overlay: All the captured waveform segments are overwritten to display as one

single segment of the waveform. A maximum of 100 frames can be displayed on the screen at a time in this mode.

• Waterfall: It displays the captured waveform segments in a cascaded display

order. A maximum of 100 frames can be displayed on the screen at a time in this mode.

• Perspective: The waveform segments are displayed in the ladder-like form, with

each segment being arranged above another with a certain perspective (angle), moving up like a rising slope. A maximum of 100 frames can be displayed on the screen at a time in this mode.

• Mosaic: The whole waveform view is divided into several blocks, and each

waveform segment is displayed in each block in sequence. A maximum of 80 frames can be displayed on the screen at a time in this mode.

Figure 7.2 Display Modes

TIP

• The UltraAcquire mode is not available when any o

cursors, decoding, Search, Zoom, Pass/Fail test, waveform recording, power analysis,

reference waveform, roll mode, slow sweep mode, and XY mode. To switch to the

UltraAcquire mode, please ensure that all of those functions are disabled.

• In UltraAcquire mode, the functions mentioned above (except for roll mode and slow

sweep mode) are disabled. When roll mode or slow sweep mode is enabled, the

acquisition mode is automatically switched to "Normal".

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f the following functions is enabled:

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Acquisition System

7.2 Sampling Mode

This oscilloscope only supports the real-time sampling mode. In this mode, the oscilloscope produces the wavefor trigger event. The maximum real-time sample rate of this series is 4 GSa/s. The current sample rate is displayed in the acquisition label at the top of the screen.

By default, the operating status label at the left top of the screen is illuminated in green, indicating that the instrument is in real-time sampling, and the button on the toolb

ar is in green. Click or tap the

m display from samples collected during one

STOP/RUN

STOP/RUN button or press the

ont-panel

"STOP" in red, and the STOP/RUN button turns r

panel can still pan or zoom the wavefor

key to stop sampling. At this time, the operating status label shows

key turns red. The oscilloscope will maintain its last captured graph. You

7.3 Sample Rate

Sampling is the process of converting an analog signal into digital data at a specified time interv rate is the reciprocal of the time interval.

Horizontal menu, the "SaRate" it

In sample rate is also indicated in the acquisition label ("A" icon) at the top of the screen, as shown in the figure below.

al and then storing them sequentially in acquisition memory. The sample

ed. Also, the backlight of the front-

ms by using the horizontal/vertical controls.

em shows the current sample rate. The current

The sample rate of the analog channel is related to the current channel mode. This series oscilloscope provides up to 4 GSa/s r mode, 2 GSa/s real-time sample rate in half channels mode, and 1 GSa/s real-time sample rate in all channels mode.

• Single channel mode: If any one of the channels is enabled, it is called single

channel mode.

• Half channels mode: If two of the channels are enabled, it is called half channels

mode.

• All channels mode: If any three channels or all four channels are enabled, it is

called all channels mode.

A sample rate that is too low might have the following effects on the waveform:

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eal-time sample rate in single channel

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Acquisition System

• Waveform Distortion: When the sample rate is too low

are lost, and the sample waveform displayed is rather different from the actual waveform of the signal.

• Waveform Aliasing: Aliasing occurs when the sample rate is twice lower than

the actual signal frequency (Nyquist Frequency). The frequency of the waveform reconstructed from the sample data is smaller than the actual signal frequency.

, some waveform details

• Waveform Leakage: If the sample rate is too low

from the sample data does not represent the original signal correctly.

7.4 Memory Depth

Memory depth refers to the number of points that the oscilloscope can store in a single trigger acquisition. It reflects the storage cap DHO4000 series oscilloscope provides up to 250 Mpts memory depth (500 Mpts optional).

, the waveform reconstructed

ability of the acquisition memory.

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Acquisition System

Trigger Point

Pre-Sample Delayed Sample

Memory Depth

Figure 7.3 Memory Depth

The following formula shows the relations among memory depth, sample rate, and horizontal time base:

MDepth ≥ SRate * TSCale * HDivs

•

MDepth

•

SRate

•

TSCale

•

HDivs

Therefore, with the same horizontal time base, a higher memory depth can ensure a higher sample rate.

Horizontal menu, click or tap the Mem Depth drop-down button t

In memory depth. The default setting is "10k". The selected memory depth value is displayed in the acquisition label ("A" icon) at the top of the screen.

indicates the memory depth. The unit is pts.

indicates the sample rate. The unit is Sa/s.

indicates the horizontal time base scale. The unit is s/div.

indicates the number of grids in the horizontal direction. The unit is div.

o select the

• When only one of the four channels (CH1-CH4) is enabled, the memory depths

ailable include Auto, 1 kpts, 10 kpts, 100 kpts, 1 Mpts, 10 Mpts, 25 Mpts, 50

av Mpts, 100 Mpts, 125 Mpts, 200 Mpts, 250 Mpts, and 500 Mpts (optional).

• When two of the four channels (CH1-CH4) are enabled, the memory depths

available include Auto, 1 kpts, 10 kpts, 100 kpts, 1 Mpts, 10 Mpts, 25 Mpts, 50 Mpts, 100 Mpts, 125 Mpts, and 250 Mpts (optional).

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Acquisition System

• When three channels or all four channels are enabled, the memor

available include Auto, 1 kpts, 10 kpts, 100 kpts, 1 Mpts, 10 Mpts, 25 Mpts, 50 Mpts, 100 Mpts (optional), and 125 Mpts (optional).

TIP

• In "Auto" mode, the oscilloscope selects the memor

the current sample rate.

• When

Acquisition Mode

depth setting.

Acquisition Mode

Mpts are available for the memory depth setting.

is set to "High Res", "Auto" is not available for the memory

is set to "Average", only 1 kpts, 10 kpts, 100 kpts, 1 Mpts, and 10

7.5 Horizontal Expansion Reference

This function allows you to set the position that the waveform on the display is referenced t time base is adjusted. In the button t Left, Right, Trigger, and User.

o when it is horizontally expanded or compressed when the horizontal

Horizontal menu, click or tap the Expand drop-down

o select the reference position. Available options include Center (default),

y depths

y depth automatically according to

• Center: when the horizontal time base is modified, the waveform will be

expanded or compressed horizontally relative to the center of the display.

• Left: when the horizontal time base is modified, the waveform will be expanded

or compressed horizontally relative to the leftmost position of the display.

• Right: when the horizontal time base is modified, the waveform will be

expanded or compressed horizontally relative to the rightmost position of the display.

• Trigger: when the horizontal time base is modified, the waveform will be

expanded or compressed horizontally relative to the trigger point.

• User: when the horizontal time base is modified, the waveform displayed will be

expanded or compressed horizontally relative to the user-defined reference position.

When you select "User", click or tap the value with the displayed numeric k default is 0.

User Expansion input field and set the

eypad. Its range is from -500 to 500, and the

7.6 Roll Mode

The roll mode causes the waveform to move across the screen from right to left. It allows you to view the acquired data without waiting for a complete acquisition. In Horizontal menu, select "Auto" or "OFF" in Roll.

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Acquisition System

• Auto: the Roll mode is enabled. It is automatically enabled when the horizontal

• OFF: the Roll mode is disabled. The oscilloscope operates at slow sweep speeds

TIP

scale is 50 ms/div or slower

when the horizontal scale is 200 ms/div or slower. In slow sweep mode, the oscilloscope acquires the data to the left of the trigger point and then waits for trigger. After the trigger occurs, it continues to acquire the data to the right of the trigger point. When you use this mode to observe low-frequency signals, it is recommended to set the channel coupling mode (

To Specify Channel Coupling

)

to "DC".

• If the Zoom mode is currently turned on, enabling the r

the Zoom mode.

• The following functions are not available when the roll mode is enabled:

To Adjust the Horizontal Position Zoom Mode (Delayed Sweep), Triggering the Oscilloscope, Protocol Decoding, Pass/Fail Test, Waveform Recording and Playing, Persistence Time, UltraAcquire, Average, XY Mode

7.7 XY Mode

By default, this series oscilloscope uses the YT mode for waveform display window. In YT mode, Y-axis indicates the V supports the XY display in which both X-axis and Y-axis indicate voltage. The XY mode converts the oscilloscope from a "Voltage-Time" display to a "Voltage-Voltage" display using two input channels.

Enable the XY Mode

You can enable the XY display mode in the following ways.

oll mode automatically turns off

(available when the oscilloscope run state is STOP),

oltage and X-axis indicates the Time. Besides, it also

• Click or tap the

toolb

ar to enter the

Windows button in the function navigation menu or on the

Add Window menu. In the "Diagram" item, click or tap XY >

Add to enable the XY display mode.

• Click or tap the XY button in the function navigation menu or on the toolbar to

enable the XY display mode.

• In the "Horizontal" menu, tick XY to enable the XY mode.

Configure the XY Mode

Click or tap at the upper-right corner of the XY display window to enter the XY configuration menu.

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Acquisition System

Figure 7.4 XY Menu

• Source: Click or tap the dr

op-down button of "Source X" to select the source channel of the X-axis in the XY window. Click or tap the drop-down button of "Source Y" to select the source channel of the Y-axis in the XY window.

Add Window menu, you can also configure Sour

In the

ce Z. Source Z, as the Zaxis input in the XY display mode, is used to control whether to display the X-Y waveforms in the XY display mode. This function is called "blanking".

- When "None" is selected for "Source Z", the blanking function is disabled,

and you can only see the X-Y waveforms.

- When you select "CH1-CH4" for "Source Z", the blanking function is

enabled. The Z-axis input from the external connector determines whether to display the X-Y waveforms. When Z is high (the input level is greater than 0 V), the X-Y waveforms are displayed; when Z is low (the input level is smaller than 0 V), the waveforms are hidden.

• Grid: Please refer to

To Set the Screen Grid

NOTE

Advanced settings are not av

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ailable for now. The current settings can produce the best display.

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Acquisition System

Phase Deviation Measurement

In this mode, you can use the Lissajous method to measur two input signals whose frequencies are the same. The following figure shows the measurement schematic diagram of phase deviation.

Figure 7.5 Measurement Schematic Diagram of Phase Deviation

e the phase deviation of the

According to sin channels. The definitions of A, B, C, and D are shown in the figure above. The phase deviation angle is obtained, that is:

Ɵ=±arcsin(A/B) or ±arcsin(C/D)

If the principal axis of the ellipse is within Quadrant I and III, the phase deviation angle obtained should be within Quadrant I and IV, namely within (0 to π/2) or (3π/2 to 2π). If the principal axis of the ellipse is within Quadrant II and IV, the phase deviation angle obtained should be within Quadrant II and III, namely within (π/2 to π) or (π to 3π/2).

The XY mode can be used to measure the phase deviation occurred when the signal under test passes through a circuit network. Connect the oscilloscope to the circuit to monitor the input and output signals of the circuit.

Ɵ = A/B or C/D, Ɵ is the phase deviation angle between the two

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Triggering the Oscilloscope

The trigger system allows you to set specific trigger conditions as required. The oscilloscope captures a wavefor on the screen once a particular trigger condition is met. For a digital oscilloscope, it samples waveform continuously no matter whether it is stably triggered. Rather, only stable triggering can produce stable display. The trigger module ensures that every time base sweep or acquisition starts from the user-defined trigger condition, namely every sweep is synchronous with the acquisition and the waveforms acquired are overlapped so as to display the stable waveforms.

You should set the triggers based on the features of the input signal. To quickly capture your desired waveforms, you need to understand the signal under test. This oscilloscope provides a variety of trigger types that help you focus on the desired waveform details.

You can enter the

• Press the front

• In

Vertical System

menu.

Trigger menu in the following ways.

-panel

menu, click or tap the

m as well as its neighboring part and displays them

key to enter the trigger menu.

Trigger button to ent

er the trigger

• Click or tap the trigger label (as shown in the figure below) at the top of the

screen to enter the trigger menu.

8.1 Trigger Source

In the "Trigger" menu, click or tap the drop-down button of Source t

ed sour

desir selected as the trigger source.

Analog channel input

Signals input from analog channels CH1-CH4 can all be used as trigger sources. No matter whether the channel selected is enabled, the channel can work normally.

AC line input

The trigger signal is obtained from the AC power input of the oscilloscope. AC trigger is usually used to measure signals relevant to the AC power frequency. For example, it can stably trigger the waveform output from the transformer of a transformer substation. It is mainly used in related measurements of the power industry.

ce. Analog channels (CH1-CH4), AC Line, or EXT (external trigger) can be

o select the

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Triggering the Oscilloscope

External trigger input

The external trigger sour other four channels are acquiring data. The trigger signal (e.g. external clock or signal of the circuit under test) will be connected to EXT trigger source via the external trigger input terminal [EXT TRIG] connector. You can set the trigger conditions within the range of the trigger level (from -8 V to +8 V).

8.2 Trigger Level

Trigger level determines where on the selected edge the trigger point occurs. The adjustment of the trigger level is r

• When the trigger source is CH1-CH4, rotate the front-panel

use the corresponding multipurpose knob (when the trigger menu is opened) to adjust the trigger lev value with the pop-up numeric k line (the color of the trigger level line is the same as that of the channel) and a

trigger icon " with the variation of the trigger lev level, the trigger level line disappears in about 2 s. The current trigger level is displayed in the trigger information label at the top of the screen.

ce can be used to trigger on the fifth channel while all the

elated to the type of the trigger source.

LEVEL knob or

el. You can also click or tap the

eypad. During the adjustment, a trigger level

" are displayed on the screen, and they move up and down

el. When you stopping modifying the trigger

Level input field to set the

In Runt Trigger, Slope Trigger, and Window trigger, you need to set the upper

and lower limits of the trigger level. Two trigger level icons displayed at the right section of the scr

• When the trigger source is AC Line, there is no trigger level.

• When the trigger source is EXT, rotate the front-panel

corresponding multipurpose knob (when the trigger menu is opened) to adjust the trigger lev with the pop-up numeric k trigger information label at the top of the screen.

For this trigger source, only the variation of the trigger level value is displayed on the screen during the adjustment of the trigger level, without displaying the trigger level lines on the screen.

To better trigger the waveforms, for a trigger with a single level, you can directly click or tap middle of the waveform. However, for a trigger with two levels (e.g. Slope trigger, Runt trigger, Window trigger, and MIL-STD-1553 trigger), you need to click or tap 90% for Level A and 10% for Level B to make the level move within the range of the waveform amplitude.

50% in the menu or press the trigger level knob t

el. You can also click or tap the

eypad. The current trigger level is displayed in the

een.

Level input field to set the value

o make the level move to the

and are

LEVEL knob or use the

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8.3 Trigger Mode

The following is the schematic diagram of the acquisition memory. To better understand the trigger event, y acquisition memory into a pre-trigger and post-trigger buffer.

Figure 8.1 Schematic Diagram of the Acquisition Memory

Triggering the Oscilloscope

ou can think of the trigger event as dividing

Trigger Event

Pre-trigger Buffer Post-trigger Buffer

Acquisition Memory

After the oscilloscope starts running, it first fills the pre-trigger buffer. Then, after the pre-trigger buffer is filled, the oscilloscope starts searching for a trigger. While searching for the trigger, the data sampled will still be transmitted to the pre-trigger buffer (the new data will continuously overwrite the previous data). When a trigger is found, the pre-trigger buffer contains the events that occurred just before the trigger. Then, the oscilloscope will fill the post-trigger buffer and display the data in the

acquisition memory. If the acquisition is initiated via the front-panel

process repeats; if the acquisition is initiat a single acquisition (you can pan and zoom the curr

This series provides Auto (default), Normal, and Single trigger modes.

Click or tap the trigger information label (as shown in the figure below) at the top of

the screen or press the front-panel Sweep mode is display (Normal), or S (Single).

item, you can quickly switch the current trigger mode. The selected trigger

ed in the trigger infor

ed via the

ently displayed waveform).

key to open the "Trigger" menu. In the

mation label at the top of the screen: A (Auto), N

key, it stops after finishing

key, the

• Auto: In this trigger mode, if the specified trigger conditions are not found,

triggers ar on the oscilloscope. This trigger mode can be used when the signal levels are unknown, when the DC signals should be displayed, or when trigger conditions occur often enough that forced triggers are unnecessary.

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e forced and acquisitions are made so that signal activity is displayed

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Triggering the Oscilloscope

• Normal: In this trigger mode, triggers and acquisitions only occur when the

specified trigger conditions are found. This trigger mode can be used when the signal is at a low r specified by the trigger settings, or when you try to stabilize the display by preventing the oscilloscope from auto-triggering.

• Single: In this trigger mode, a single trigger and acquisition only occur when the

specified trigger conditions are found, and then the oscilloscope stops. This trigger mode can be used when you need to make a single acquisition of the specified event and analyze the acquisition result. You can pan and zoom the currently displayed waveform without subsequent waveform data overwriting the current waveform. After a single trigger is initiated, the oscilloscope is in "STOP" state.

Normal and Single trigger modes, you can click or tap the Force button in the

epetition rate, when you only want to acquire specific events

trigger menu or press the fr

8.4 Trigger Coupling

Trigger coupling determines what part of the signal is passed to the trigger circuit. Please distinguish it from channel coupling ( function is available only when the trigger type is Edge and the trigger source is an analog channel.

In the "Trigger" menu, click or tap the desired coupling mode (by default, it is DC).

• DC: allows DC and AC components to p

• AC: blocks the DC components and attenuates the signals.

• LFR: blocks the DC components and rejects the low-frequency components.

ont-panel

key to force a trigger event.

To Specify Channel Coupling

Coupling drop-down button t

ass the trigger circuitry.

). This

o select the

• HFR: rejects the high frequency components.

TIP

When "AC" or "LFR" is selected as the coupling mode, no trigger lev

are displayed. When you adjust the trigger level, you can only see the changes of the trigger

level values in the trigger information label at the top of the screen.

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el lines and trigger icons

Page 86

8.5 Trigger Holdoff

Trigger holdoff can be help stabilize triggering on complex repetitive waveforms that have multiple edges or other events betw series). Holdoff time is specified as the amount of time that the oscilloscope waits for re-arming the trigger circuitry after generating a correct trigger. The oscilloscope will not trigger even if the trigger condition is met during the holdoff time and will only re-arm the trigger circuitry after the holdoff time expires.

For example, to get a stable trigger on the repetitive pulse burst as shown in the figure below, set the holdoff time to be greater than t1 but less than t2.

Triggering the Oscilloscope

een waveform repetitions (such as pulse

Click or tap the trigger infor

the screen or press the front-panel tap the input field o

efor

the wav use the corresponding multipurpose knob to set the value. The adjustable range of the holdoff time is from 8 ns (default) to 10 s.

ms are stably triggered) with the pop-up numeric keypad. You can also

f Holdoff t

8.6 Noise Rejection

Noise rejection can reject the high frequency noise in the signal and reduce the possibility of triggering the oscilloscope by mistake.

Figure 8.2 Trigger Holdoff

mation label (as shown in the figur

key to open the "Trigger" menu. Click or

o set the holdoff time (the holdoff to this time when

e below) at the t

op of

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Triggering the Oscilloscope

Click or tap the trigger information label (as shown in the figure below) or press the

front-p on/off switch t

TIP

This function is av

anel

key to open the "Trigger" menu. Click or tap the Noise Reject

o enable or disable the noise rejection function.

ailable only when the trigger sour

8.7 Trigger Type

This series oscilloscope provides the following trigger types.

8.7.1 Edge Trigger

Edge trigger identifies a trigger on the trigger level of the specified edge on the input signal.

ce is set t

o an analog channel or EXT.

Trigger T

Click or tap the

ype

Type drop-down button to select "Edge".

Figure 8.3 Edge Trigger Setting Menu

After a trigger type is select trigger type, source, and level) is displayed in the trigger information label at the top of the screen, as shown in the figure below. The information will change based on the trigger settings.

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ed, the current trigger setting information (including the

Page 88

Source Selection

Triggering the Oscilloscope

Click or tap Source dr

efer t

Trigger Source

op-down button to select CH1-CH4, AC Line, or EXT. For details,

. The selected trigger source is indicated in the trigger

information label at the top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you obtain a stable trigger.

Edge Type

In the The select

Slope it

em, select which edge of the input signal will trigger the oscilloscope.

ed slope will be indicat

ed in the trigger information label.

• Rising: triggers on the rising edge of the input signal when the voltage level

meets the specified trigger level.

• Falling: triggers on the falling edge of the input signal when the voltage level

meets the specified trigger level.

• Either: triggers on the rising or falling edge of the input signal when the voltage

level meets the preset trigger level.

TIP

When edge trigger is select

edge type.

ou can also pr

ed, y

ess the front-panel

key to switch the

Trigger Mode

Sweep, select Auto, Normal, or Single as the trigger mode. For details, r

descriptions in

Trigger Mode

efer to

Trigger Parameter Setting

You can refer to

Trigger Coupling, Trigger Holdoff

, and

Noise Rejection

to set the

trigger coupling, trigger holdoff, and noise rejection under this trigger type.

Trigger Level

Click or tap the

eypad. You can also use the front-panel trigger level knob or the corresponding

Level input field to set the trigger level with the pop-up numeric

multipurpose knob to set the trigger level. For details, refer to descriptions in

Level

. The current trigger level is displayed in the trigger information label at the top

of the screen.

Trigger

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Triggering the Oscilloscope

8.7.2 Pulse Width Trigger

Pulse width triggering sets the oscilloscope to trigger on the positive or negative pulse of a specified width. In this mode, the oscilloscope will trigger when the pulse width of the input signal satisfies the specified pulse width condition.

In this oscilloscope, positiv

e pulse width is defined as the time difference between the two crossing points of the trigger level and positive pulse; negative pulse width is defined as the time difference between the two crossing points of the trigger level and negative pulse, as shown in the figure below.

+Width

-Width

Trigger Level

Figure 8.4 Positive/Negative Pulse Width

Trigger Type

Click or tap Type drop-down button to select "Pulse".

Figure 8.5 Pulse Width Trigger Setting Menu

After a trigger type is select

ed, the current trigger setting information (including

trigger type, trigger source, and trigger level) is displayed in the trigger information

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Triggering the Oscilloscope

label at the top of the screen, as shown in the figure below. The information will change based on the trigger settings.

Source Selection

Click or tap Source dr

Source

top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you obtain a stable trigger.

Polarity

In the

polarity ( ).

Trigger Condition

Set the trigger condition in the When it

• When y

• When you select "Positive" for polarity, "<" for trigger condition, the oscilloscope

. The selected trigger source is indicated in the trigger information label at the

Polarity it

ou select "P triggers when the positive pulse width of the input signal is greater than the specified pulse width.

triggers when the positive pulse width of the input signal is smaller than the specified pulse width.

op-down button to select CH1-CH4. For details, refer to

em, select the desired polarity: positive polarity (

em.

ositive" for polarity, ">" for trigger condition, the oscilloscope

) or negative

Trigger

• When you select "Positive" for polarity, "< >" for trigger condition, the

oscilloscope triggers when the positive pulse width of the input signal is greater than the specified lower limit of pulse width and smaller than the specified upper limit of pulse width.

• When you select "Negative" for polarity, ">" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is greater than the specified pulse width.

• When you select "Negative" for polarity, "<" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is smaller than the specified pulse width.

• When you select "Negative" for polarity, "< >" for trigger condition, the

oscilloscope triggers when the negative pulse width of the input signal is greater than the specified lower limit of pulse width and smaller than the specified upper limit of pulse width.

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Triggering the Oscilloscope

Pulse Width Setting

• In the When menu, when ">" or "<" is selected, click or tap the input field of Lower or Upper to set the lower limit value or the upper limit value with the

pop-up numeric keyp to set the value. The pulse width available is from 1 ns to 10 s.

ad. You can also use the corresponding multipurpose knob

• In the

Trigger Mode

Sweep, select Auto, Normal, or Single as the trigger mode. For details, r

In descriptions in

Trigger Parameter Setting

You can refer to noise rejection under this trigger type.

Trigger Level

Click or tap the k

eypad. You can also use the front-panel trigger level knob or the corresponding

multipurpose knob to set the trigger level. For details, refer to descriptions in

Level

of the screen.

When menu, when "< >" is selected, click or tap the input field of Upper

and Lower respectively to set the lower limit value and the upper limit value with the pop-up numeric keyp knob to set the values. The lower limit of the pulse width must be smaller than the upper limit.

Trigger Mode

Trigger Holdoff

Level input field to set the trigger level with the pop-up numeric

. The current trigger level is displayed in the trigger information label at the top

ad. You can also use the corresponding multipurpose

efer to

and

Noise Rejection

to set the trigger holdoff and

Trigger

8.7.3 Slope Trigger

Slope triggering sets the oscilloscope to trigger on the positive or negative slope of the specified time. This trigger mode is applicable to ramp and triangle wavefor

In this oscilloscope, positive slope time is defined as the time difference between the two crossing points of trigger level line A and B with the rising edge; negative slope time is defined as the time difference between the two crossing points of trigger level line A and B with the falling edge. See the figure below.

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ms.

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Triggering the Oscilloscope

Trigger T

Click or tap the

ype

Upper Limit of Trigger Level (Up Level)

Positive Slope Time

Figure 8.6 Positive Slope Time/Negative Slope Time

Type drop-down button to select "Slope".

Negative Slope Time

Lower Limit of Trigger Level (Low

Level)

Figure 8.7 Slope Trigger Setting Menu

After a trigger type is select trigger type, trigger source, and trigger level) is displayed in the trigger information label at the top of the screen, as shown in the figure below. The information will change based on the trigger settings.

Source Selection

Click or tap Source drop-down button to select CH1-CH4. For details, refer to

Source

top of the screen.

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. The selected trigger source is indicated in the trigger information label at the

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ed, the current trigger setting information (including

Trigger

DHO4000 User Guide

Page 93

Triggering the Oscilloscope

Only when you select the channel that has signal inputs as the trigger source, can you obtain a stable trigger.

Edge Type

Select the input signal edge (in the Slope item) on which the oscilloscope triggers.

• Rising: triggers on the rising edge o

• Falling: triggers on the falling edge of the input signal.

Trigger Condition

Sets the trigger condition in the

• When you select "Rising" for the edge type, "> oscilloscope triggers when the positive slope time of the input signal is greater than the specified time.

• When you select "Rising" for the edge type, "<" for trigger condition, the oscilloscope triggers when the positive slope time of the input signal is smaller than the specified time.

• When you select "Rising" for the edge type, "< >" for trigger condition, the oscilloscope triggers when the positive slope time of the input signal is greater than the specified lower limit time and smaller than the specified upper limit time.

• When you select "Falling" for the edge type, ">" for trigger condition, the oscilloscope triggers when the negative slope time of the input signal is greater than the specified time.

When item.

f the input signal.

" for trigger condition, the

• When you select "Falling" for the edge type, "<" for trigger condition, the oscilloscope triggers when the negative slope time of the input signal is smaller than the specified time.

• When you select "Falling" for the edge type, "< >" for trigger condition, the oscilloscope triggers when the negative slope time of the input signal is greater than the specified lower limit time and smaller than the specified upper limit time.

Slope Time Setting

• In the

When item, when ">" or "<

input field of with the pop-up numeric keyp set the value. The slope time available is from 1 ns to 10 s.

When item, when "< >" is set t

field of limit value with the pop-up numeric k

Lower or Upper to set the lower limit value or the upper limit value

Upper and Lower respectively to set the upper limit value and the lower

" is set to trigger conditions, click or tap the

ad. You can also use the corresponding knob to

o trigger conditions, click or tap the input

eypad. You can also use the corresponding

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Triggering the Oscilloscope

knob to set the values. The lower slope time limit must be smaller than the upper slope time limit.

Trigger Mode

In Sweep, select Auto, Normal, or Single as the trigger mode. For details, r descriptions in

Trigger Parameter Setting

You can refer to noise rejection under this trigger type.

Level Selection and Setting

After the trigger condition setting is completed, you need to adjust the trigger level to correctly trigger the signal and obtain a stable waveform.

Click or tap the numeric keypad. You can also use the trigger level knob or use the corresponding multipurpose knob to adjust level A/level B. When and lower limit v lower limit remains unchanged. For details, refer to descriptions in current trigger level is displayed in the trigger information label at the top of the screen.

TIP

Trigger Mode

Trigger Holdoff

Level A/Level B input field to set the level A/lev

alues change at the same time. The difference between upper and

and

Noise Rejection

to set the trigger holdoff and

el B with the pop-up

Linkage is ticked, the upper limit

Trigger Level

efer to

. The

Press the trigger level knob to switch between three modes: "only adjust Level A", "only adjust

Level B", and "adjust Level A and Level B at the same time".

8.7.4 Video Trigger

The video signal can include image information and timing information, which adopts different standards and for field or line of NTSC (National Television Standards Committee), PAL (Phase Alternating Line), or SECAM (Sequential Couleur A Memoire).

Trigger Type

Click or tap the

Type drop-down button to select "Video".

mats. This series can trigger on the standard video signal

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Triggering the Oscilloscope

Figure 8.8 Video Trigger Setting Menu

Source Selection

Click or tap Source drop-down button to select CH1-CH4. For details, refer to

Source

top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you obtain a stable trigger.

Video Polarity

. The selected trigger source is indicated in the trigger information label at the

ed, the current trigger setting information (including

Trigger

In the

polarity ( ).

Video S

Click or tap the dr

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Polarity it

tandar

em, select the desired polarity: positive polarity (

op-down button of

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Standard t

o select the desir

) or negative

ed video standar

Page 96

Table 8.1 Video Standard

Triggering the Oscilloscope

Video Standard

NTSC 30 Interlaced Scan 525 PAL/SECAM 25 Interlaced Scan 625 480p/60Hz 60 Progressive Scan 525 576p/50Hz 50 Progressive Scan 625 720p/60Hz 60 Progressive Scan 750 720p/50Hz 50 Progressive Scan 750 720p/30Hz 30 Progressive Scan 750 720p/25Hz 25 Progressive Scan 750 720p/24Hz 24 Progressive Scan 750 1080p/60Hz 60 Progressive Scan 1125 1080p/50Hz 50 Progressive Scan 1125 1080p/30Hz 30 Progressive Scan 1125 1080p/25Hz 25 Progressive Scan 1125 1080p/24Hz 24 Progressive Scan 1125 1080i/60Hz 60 Interlaced Scan 1125 1080i/50Hz 50 Interlaced Scan 1125

Frame Frequency (Frame)

Scan Type TV Scan Line

Sync

In the Sync item, select the desired sync type.

• All Lines: triggers on the first line found.

• Line: triggers on the specified line.

When this sync type is selected, you can specify a line number. Click or tap the input field of Line to set the line number by using the pop-up numeric keypad. You can also use the corresponding multipurpose knob to set the value. The range of the line number is related to the currently selected video standards. The range is from 1 to 525 (NTSC), 1 to 625 (PAL/SECAM), 1 to 525 (480p), 1 to 625 (576p), 1 to 750 (720p), or 1 to 1125 (1080p/1080i).

• Odd: triggers on the rising edge of the first ramp pulse in the odd field. It is only available when the video standard is set to "NTSC" or "PAL/SECAM".

• Even: triggers on the rising edge of the first ramp pulse in the even field. It is only available when the video standard is set to "NTSC" or "PAL/SECAM".

Trigger Mode

In Sweep, select Auto, Normal, or Single as the trigger mode. For details, r descriptions in

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Triggering the Oscilloscope

Trigger Parameter Setting

You can refer t

Noise Rejection

Trigger Level

Click or tap the k

eypad. You can also use the front-panel trigger level knob or the corresponding

Level input field to set the trigger level with the pop-up numeric

multipurpose knob to set the trigger level. For details, refer to descriptions in

Level

. The current trigger level is displayed in the trigger information label at the top

of the screen.

TIP

• To better obser

depth first.

• In the trigger debugging process of video signals, the frequency in different part of the

signal can be reflected by a different brightness, as RIGOL's digital oscilloscope provides

the intensity graded color display function. Experienced users can quickly judge the

signal quality and discover abnormalities during the debugging process.

ve the waveform details in the video signal, you can set a larger memory

8.7.5 Pattern Trigger

The pattern trigger identifies a trigger condition by looking for a specified pattern. This patter (high), L (low), or X (don't care). A rising or falling edge (you can only specify a single edge) can be specified for one channel included in the pattern. When an edge is specified, the oscilloscope will trigger at the edge specified if the pattern set for the other channels are true (namely the actual pattern of the channel is the same as the preset pattern). If no edge is specified, the oscilloscope will trigger on the last edge that makes the pattern true. If all the channels in the pattern are set to "X", the oscilloscope will not trigger.

n is a logical "AND" combination of channels. Each channel can be set to H

to set the noise rejection under this trigger type.

Trigger

Figure 8.9 Pattern Trigger

Trigger T

Click or tap the

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ype

Type drop-down button to select "Pattern".

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Triggering the Oscilloscope

Figure 8.10 Pattern Trigger Setting Menu

Source Selection

Click or tap Source drop-down button to select CH1-CH4. For details, refer to

Source

top of the screen.

Only when you select the channel that has signal inputs as the trigger source, can you obtain a stable trigger.

Pattern Setting

. The selected trigger source is indicated in the trigger information label at the

ed, the current trigger setting information (including

Trigger

The following five patterns are available:

• 1: sets the pattern of the channel selected to "1", i.e. the voltage level is higher than the trigger level of the channel.

• 0: sets the pattern of the channel selected to "0", i.e. the voltage level is lower than the trigger level of the channel.

• X: sets the pattern of the channel selected to "X", i.e. this channel is not used as a part of the pattern. When all channels in the pattern are set to "X", the oscilloscope will not trigger.

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Triggering the Oscilloscope

• : sets the pattern to the rising edge of the channel selected.

• : sets the pattern to the falling edge of the channel selected.

The Left/Right arrow k "All" indicates all bits. Select a pattern for a channel and then click or tap patter

ns of all the other channels will be set to the currently selected pattern. The

pattern setting is as shown in the figure below.

Only one edge (rising or falling edge) can be specified in the pattern. If one edge item is currently defined and then another edge item is defined in another channel in the p

attern, then a prompt message "Invalid input" is displayed.

ey indicates moving left/right to switch the channel pattern.

All. The

Trigger Mode

Sweep, select Auto, Normal, or Single as the trigger mode. For details, r

In descriptions in

Trigger Parameter Setting

You can refer to noise rejection under this trigger type.

Trigger Level

Click or tap the Level input field to set the trigger level with the pop-up numeric keypad. You can also use the front-panel trigger level knob or the corresponding multipurpose knob to set the trigger level. For details, refer to descriptions in

. The current trigger level is displayed in the trigger information label at the top

Level

of the screen.

Trigger Mode

Trigger Holdoff

8.7.6 Duration Trigger

In duration trigger, the oscilloscope identifies a trigger condition by searching for the duration of a specified patt channels. Each channel can be set to 1 (high), 0 (low), or X (don't care). The

efer to

and

Noise Rejection

to set the trigger holdoff and

Trigger

ern. This pattern is a logical "AND" combination of the

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Triggering the Oscilloscope

instrument triggers when the duration (∆T) of this pattern meets the preset time, as shown in the figure below.

CH1

CH2

CH3

CH4

∆T ∆T

Figure 8.11 Duration Trigger

Pattern:HLHL

Trigger T

ype

Click or tap the

Type drop-down button to select "Duration".

Figure 8.12 Duration Trigger Setting Menu

After a trigger type is select

ed, the current trigger setting information (including

trigger type, trigger source, and trigger level) is displayed in the trigger information

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DHO4000 User Guide

RIGOL DHO4404, DHO4804, DHO4204 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

List of Figures

List of Tables

Safety Requirement

1.1 General Safety Summary

1.2 Safety Notices and Symbols

1.3 Measurement Category

1.4 Ventilation Requirement

1.5 Working Environment

1.6 Care and Cleaning

1.7 Environmental Considerations

Product Features

Document Overview

Quick Start

4.1 General Inspection

4.2 Appearance and Dimensions

4.3 To Prepare for Use

4.3.1 Tilting the Oscilloscope for Easier Viewing

4.3.2 Connecting to Power

4.3.3 Turn-on Checkout

4.3.4 Replacing the Fuse

4.3.5 Setting the System Language

4.3.7 Function Inspection

4.3.8 Probe Compensation

4.4 Product Overview

4.4.1 Front Panel Overview

4.4.2 Rear Panel Overview

4.4.3 User Interface Overview

4.5 Touch Screen Gestures

4.5.1 Tap

4.5.2 Pinch&Stretch

4.5.3 Drag

4.6 Parameter Setting Method

4.7 Using the Security Lock

4.8 Accessing the Built-in Help System

Vertical System

5.1 To Enable or Disable the Analog Channel

5.2 To Adjust the Vertical Scale

5.3 To Adjust the Vertical Offset

5.4 To Specify Channel Coupling

5.6 To Specify Input Impedance

5.7 To Invert a Waveform

5.8 To Set Probe

5.9 To Specify the Amplitude Unit

5.11 To Specify the Skew

5.12 To Turn the Channel Label Display On/Off

Horizontal System

6.1 To Adjust the Horizontal Time Base

6.2 To Adjust the Horizontal Position

6.3 Zoom Mode (Delayed Sweep)

Acquisition System

7.1 Acquisition Mode

7.2 Sampling Mode

7.3 Sample Rate

7.4 Memory Depth

7.5 Horizontal Expansion Reference

7.6 Roll Mode

7.7 XY Mode

Triggering the Oscilloscope

8.1 Trigger Source

8.2 Trigger Level

8.3 Trigger Mode

8.4 Trigger Coupling

8.5 Trigger Holdoff

8.6 Noise Rejection

8.7 Trigger Type

8.7.1 Edge Trigger

8.7.2 Pulse Width Trigger

8.7.3 Slope Trigger

8.7.4 Video Trigger

8.7.5 Pattern Trigger

8.7.6 Duration Trigger