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Figure 9.7 FFT Operation Menu

Operation On/Off

Click or tap the

Operation on/off switch to enable the FFT operation result window.

The parameters such as center frequency, frequency range, and resolution are

displayed at the top of the window, as shown in the figure below. FFT resolution is the

quotient of the sample rate and the number of FFT points. If the number of FFT points

is a fixed value, then the higher the sample rate, the higher the resolution.

NOTE

The number of FFT analysis points can be 1 Mpts in maximum.

Source

Center

Frequency

Label

Sample

rate

Frequency

Span

Resolution

Figure 9.8 FFT Operation Window

Math Operation

DHO800 User Guide

114

Table of Contents3
Safety Requirement15
General Safety Summary15
Safety Notices and Symbols16
Measurement Category17
Ventilation Requirement18
Working Environment18
Care and Cleaning20
Environmental Considerations20
Product Features21
Document Overview22
Quick Start24
General Inspection24
Appearance and Dimensions24
Figure 4.1 Front View24
To Prepare for Use25
To Adjust the Supporting Legs25
Figure 4.2 Side View25
Figure 4.3 Adjusting the Supporting Legs25
To Connect to Power26
Turn-On Checkout26
Figure 4.4 to Connect to Power26
Table 4.1 Power Adaptor Specifications26
To Set the System Language27
To Connect the Probe27
Function Inspection28
Figure 4.5 Connecting the Passive Probe28
Probe Compensation29
Figure 4.6 Using the Compensation Signal29
Figure 4.7 Square Waveform Signal29
Product Overview30
Figure 4.8 Probe Compensation30
Front Panel Overview31
Figure 4.9 Front Panel (2-Channel Model)31
Figure 4.10 Front Panel (4-Channel Model)31
Rear Panel Overview37
Figure 4.11 Rear Panel37
User Interface Overview38
Figure 4.12 User Interface38
Touch Screen Gestures40
Tap41
Drag41
Figure 4.13 Tap Gesture41
Pinch&Stretch42
Figure 4.14 Drag Gesture42
Figure 4.15 Pinch&Stretch Gesture42
Parameter Setting Method43
Figure 4.16 English Input Interface43
Figure 4.17 Chinese Input Interface45
Figure 4.18 String Keypad46
Figure 4.19 Numeric Keypad47
To Use the Security Lock48
Figure 4.20 to Use the Security Lock48
To Use the Built-In Help System49
Vertical System50
To Enable or Disable the Analog Channel50
Figure 5.1 Vertical Menu50
To Adjust the Vertical Scale51
To Adjust the Vertical Offset53
To Specify Channel Coupling54
To Specify Bandwidth Limit54
To Specify Input Impedance55
To Invert a Waveform55
To Set Probe56
Figure 5.2 Waveform Invert On/Off56
Figure 5.3 Probe Setting Menu56
Table 5.1 Probe Ratio57
To Specify the Amplitude Unit58
To Adjust Bias58
To Specify the Skew59
To Turn the Channel Label Display On/Off59
Figure 5.4 Zero Offset59
Horizontal System61
To Adjust the Horizontal Time Base61
Figure 6.1 Horizontal Menu61
To Adjust the Horizontal Position62
Zoom Mode (Delayed Sweep)63
Figure 6.2 Zoom Mode64
Acquisition System65
Acquisition Mode65
Figure 7.1 Horizontal Menu65
Sampling Mode67
Figure 7.2 Display Modes67
Sample Rate68
Memory Depth69
Figure 7.3 Memory Depth69
Horizontal Expansion Reference70
Roll Mode71
XY Mode71
Figure 7.4 XY Menu72
Figure 7.5 Measurement Schematic Diagram of Phase Deviation73
Triggering the Oscilloscope75
Trigger Source75
Trigger Level76
Trigger Mode76
Figure 8.1 Schematic Diagram of the Acquisition Memory77
Trigger Coupling78
Trigger Holdoff78
Noise Rejection79
Trigger Type79
Figure 8.2 Trigger Holdoff79
Edge Trigger80
Figure 8.3 Edge Trigger Setting Menu80
Pulse Width Trigger81
Figure 8.4 Positive/Negative Pulse Width82
Figure 8.5 Pulse Width Trigger Setting Menu82
Slope Trigger84
Figure 8.6 Positive Slope Time/Negative Slope Time84
Figure 8.7 Slope Trigger Setting Menu85
Video Trigger87
Figure 8.8 Video Trigger Setting Menu87
Table 8.1 Video Standard88
Pattern Trigger89
Figure 8.9 Pattern Trigger90
Figure 8.10 Pattern Trigger Setting Menu90
Duration Trigger92
Figure 8.11 Duration Trigger92
Figure 8.12 Duration Trigger Setting Menu93
Timeout Trigger95
Figure 8.13 Timeout Trigger95
Figure 8.14 Timeout Trigger Menu95
Runt Trigger97
Figure 8.15 Runt Trigger97
Figure 8.16 Runt Trigger Setting Menu97
Window Trigger99
Figure 8.17 Window Trigger Setting Menu99
Delay Trigger101
Figure 8.18 Delay Trigger101
Figure 8.19 Delay Trigger Setting Menu102
Setup/Hold Trigger104
Figure 8.20 Setup/Hold Trigger104
Figure 8.21 Setup/Hold Trigger Setting Menu105
Nth Edge Trigger106
Figure 8.22 Nth Edge Trigger107
Figure 8.23 Nth Edge Trigger Setting Menu107
RS232 Trigger109
Figure 8.24 Schematic Diagram of RS232 Protocol109
Figure 8.25 RS232 Trigger Setting Menu109
I2C Trigger111
Figure 8.26 Sequence Diagram of I2C Protocol112
Figure 8.27 I2C Trigger Setting Menu112
Figure 8.28 Binary Format Setting114
Figure 8.29 Hexadecimal Format Setting114
SPI Trigger115
Figure 8.30 Sequential Chart of SPI Bus115
Figure 8.31 SPI Trigger Setting Menu116
Trigger Output Connector118
Math Operation119
Figure 9.1 Math Menu119
Arithmetic Operation120
Figure 9.2 Waveform Display Window of the Operation Results120
Figure 9.3 Arithmetic Operation Menu121
Figure 9.4 Operation Result Display Window121
Function Operation123
Figure 9.5 Function Operation Menu124
Figure 9.6 Operation Result Display Window125
FFT Operation127
Figure 9.7 FFT Operation Menu128
Figure 9.8 FFT Operation Window128
Table 9.1 Window Function130
Figure 9.9 Peak Search131
Logic Operation132
Figure 9.10 Logic Operation Menu132
Table 9.2 Logic Operation133
Figure 9.11 Operation Result Display Window134
Digital Filter135
Figure 9.12 Digital Filter Menu136
Figure 9.13 Operation Result Display Window137
Measurements140
Auto Scale140
Auto Measurements141
Measurement Parameter141
Time Parameters141
Figure 10.1 Time Parameters141
Count Values142
Delay and Phase Parameters144
Figure 10.2 Delay and Phase Parameters144
Voltage Parameters146
Figure 10.3 Voltage Parameters146
Other Parameters147
Select the Measurement Item148
Figure 10.4 Vertical Measurement Items148
Figure 10.5 Horizontal Measurement Items149
Figure 10.6 Other Measurement Items149
Measurement Settings150
Figure 10.7 Measurement Settings Menu150
Remove the Measurement Results153
Cursor Measurements154
Figure 10.8 Cursors154
Manual Mode156
Figure 10.9 Manual Mode Setting Menu156
Track Mode158
Figure 10.10 Manual Cursor Measurement Example158
Figure 10.11 Track Mode Setting Menu159
Figure 10.12 Track Measurement (before Horizontal Expansion)160
XY Mode161
Figure 10.13 Track Measurement (after Horizontal Expansion)161
Figure 10.14 XY Mode Setting Menu161
Digital Voltmeter (DVM) and Frequency Counter163
Digital Voltmeter (DVM)163
Measurement Settings163
Figure 11.1 DVM Setting Menu164
Remove the Measurement165
Frequency Counter165
Measurement Settings166
Figure 11.2 Frequency Counter Setting Menu166
Reset Statistics167
Remove the Measurement167
Histogram Analysis168
To Enable or Disable the Histogram Function168
Figure 12.1 Histogram Menu168
To Select the Histogram Type169
To Select the Histogram Source169
To Set the Histogram Height169
Figure 12.2 Histogram Analysis Interface169
To Set the Histogram Range170
Histogram Analysis Results170
Figure 12.3 Histogram Analysis Results171
To Remove Results172
To Clear Statistics172
Reference Waveform173
To Enable Ref Function173
To Set the Reference Waveform173
Figure 13.1 Reference Waveform Menu173
To Set the Ref Waveform Display174
Export and Import Operation175
Pass/Fail Test177
Figure 14.1 Passfail Menu177
Figure 14.2 Passfail Menu-Simplified177
To Enable or Disable the Pass/Fail Test Function178
To Select the Source178
To Create a Mask178
To Set the Output Form of the Test Results179
To Start or Stop the Pass/Fail Test Operation180
To Display the Statistics of the Test Results180
Figure 14.3 Pass/Fail Test Interface180
Protocol Decoding182
Parallel Decoding182
Figure 15.1 Schematic Diagram of Parallel Decoding182
Clock Setting (CLK)183
Figure 15.2 Parallel Decoding Menu183
Bus Setting184
Table 15.1 Bus Setting184
Display-Related Settings185
Event Table185
RS232 Decoding186
Figure 15.3 Parallel Decoding Event Table186
Figure 15.4 Schematic Diagram of RS232 Serial Bus187
Figure 15.5 RS232 Decoding Menu187
Source Setting188
To Set Data Package189
Display-Related Settings189
Event Table190
Figure 15.6 RS232 Decoding Event Table190
I2C Decoding191
Figure 15.7 I2C Serial Bus191
Figure 15.8 I2C Decoding Menu191
Source Setting192
Display-Related Settings192
Event Table193
Figure 15.9 I2C Decoding Event Table193
SPI Decoding194
Figure 15.10 SPI Serial Bus194
To Set the Source195
Figure 15.11 SPI Decoding Menu195
To Set Mode and Data196
Display-Related Settings197
Event Table197
Figure 15.12 SPI Decoding Event Table198
Multi-Pane Windowing199
Figure 16.1 "Add Window" Menu199
Waveform Recording and Playing201
Common Settings201
Figure 17.1 "Record" Menu201
Record Options202
Play Options203
Figure 17.2 Minimized "Play" Menu204
Search and Navigation206
Search206
Figure 18.1 Search Menu206
Navigation208
Figure 18.2 Marktable Display208
Figure 18.3 Navigation Menu209
Figure 18.4 Simplified Navigation Menu209
Figure 18.5 "Search Event" Navigation Setting Menu210
Figure 18.6 "Frame Segment" Navigation Setting Menu210
Display Control212
Display Type212
Persistence Time212
Figure 19.1 Display Setting Menu212
Waveform Intensity213
To Set the Screen Grid213
Display Settings213
Show Scale214
Color Grade214
Waveform Freeze214
Store and Load215
To Enter the Storage Menu215
To Save a File215
To Save Image215
Figure 20.1 Image Saving Setting Menu216
To Save Wave217
Figure 20.2 Waveform Saving Setting Menu218
Save Setup219
Figure 20.3 Setup Saving Setting Menu219
Binary Data Format (.Bin)220
Table 20.1 bin File Format220
Table 20.2 File Header221
Table 20.3 Waveform Header221
To Load a File223
Table 20.4 Waveform Data Header223
Firmware Upgrade224
Figure 20.4 Load Setting Menu224
Disk Management225
Figure 20.5 Upgrade Menu225
Figure 20.6 Disk Management Interface226
System Utility Function Setting228
I/O Setting228
Basic Settings230
About this Oscilloscope232
Other Settings233
Auto Config233
Selfcal234
Option List234
Quick Action Settings234
Figure 21.1 Self-Calibration Menu234
Figure 21.2 Quick Menu235
Self-Check237
Remote Control238
Remote Control Via USB239
Remote Control Via LAN239
Troubleshooting241
Appendix242
Appendix A: Options and Accessories242
Appendix B: Warranty242
Appendix C: Factory Settings243
Table 24.2 Factory Settings248

Rigol DHO814 User Manual

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Brand	Rigol
Model	DHO814
Category	Test Equipment
Language	English