Teledyne LeCroy T3DSO1104 User manual

User Manual

T3DSO1000 Series Digital

Oscilloscope

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Copyright and Declaration

Copyright

Teledyne LeCroy. All Rights Reserved.

Trademark Information
Teledyne Test Tools is the registered trademark of Teledyne LeCroy.

Declaration
Teledyne Test Tools products are protected by patent law.

Teledyne Test Tools reserves the right to modify or change parts of or all the

specifications or pricing policies at company’s sole decision.
Information in this publication replaces all previously corresponding material.
Any way of copying, extracting or translating the contents of this manual is not allowed
without the permission of Teledyne Test Tools.

Product Certification
Teledyne Test Tools guarantees this product conforms to national and industrial

standards and other international standards.

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User Manual I

Safety Information

General Safety Summary

Carefully read the following safety precautions to avoid any personal injury or
damage to the instrument and any products connected to it. To avoid potential
hazards, please use the instrument as specified.

Use Proper Power Line

Only the power cord designed for the instrument and country should be used.

Ground the Instrument

The instrument is grounded through the protective earth conductor of the power line. To
avoid electric shock, please make sure the instrument is grounded correctly before
connecting its input or output terminals.

Connect the Signal Ground Wire Correctly

The potential of the signal ground wire is equal to earth, so do not connect the signal
ground wire to a high voltage.

Look Over All Terminal Ratings

To avoid fire or electric shock, please look over all ratings and sign instructions of the
instrument. Before connecting the instrument, please read the manual carefully to gain
more information about the ratings.

Use Proper Overvoltage Protection

Make sure that no overvoltage (such as that caused by a thunderstorm) can reach the
product, or else the operator might be exposed to the danger of electrical shock.

Electrostatic Prevention

Operate in an electrostatic discharge protective environment to avoid damage induced by
static discharge. Always ground both the internal and external conductors of any cables to
discharge static before connecting.

Keep Ventilated

Inadequate ventilation may cause increasing product temperature, which will eventually
damage the instrument. So keep well ventilated and inspect the intake and fan regularly.

Avoid contact with Exposed Circuit or Components

Do not touch exposed contacts or components when the power is on.

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Use proper Fuse

Use only the specified fuse.

Do Not Operate Without Covers

Do not operate the instrument with covers or panels removed.

Do Not Operate With Suspected Failures.

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

Tools authorized personnel.

Do Not Operate in Wet Conditions.

In order to avoid short circuiting the interior of the device or electric shock, please do
not operate in a high humidity environment.

Do Not Operate in an Explosive Atmosphere.

In order to avoid damage to the device or personal injuries, it is important to operate the
device away from an explosive atmosphere.

Keep Product Surfaces Clean and Dry.

To avoid the influence of dust and/or moisture in the air, please keep the surface of the
instrument clean and dry.

Handling Safety

Please handle with care during transportation to avoid damages to buttons, knob
interfaces and other parts on the panels.

Only probe assemblies which meet the manufacturer’s specifications shall be used.
When using 2X/…/10000X probe assemblies, the probe assemblies shall be insulated

from the measured circuits by double or reinforced insulation.

All probe assemblies should meet the requirements of UL 61010-031 and
CAN/CSA-C22.2 No. 61010-031-07.

If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.

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User Manual III

Safety Terms and Symbols

Terms in this Manual. These terms may appear in this manual:

WARNING

Warning statements indicate the conditions or practices that could
result in injury or loss of life.

CAUTION

Caution statements indicate the conditions or practices that could
result in damage to this product or other property.

Terms on the product. These terms may appear on the product:

DANGER Indicates direct injuries or hazards that may happen.
WARNING Indicates potential injuries or hazards that may happen.
CAUTION Indicates potential damage to the instrument or other property that may

happen.

Symbols on the product. These symbols may appear on the product:

Hazardous protective Earth Warning Test Power Switch

Voltage Terminal Ground

If find such symbols appear on the product, consult the manual to find out the nature
of the potential hazard and the actions which have to be taken.

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Measurement Category

Measurement Categories

This oscilloscope can make measurements in circuits that are not directly connected
to mains.

WARNING

This oscilloscope can only be used for measurements within its specified
measurement categories.

Do not use the product for measurements within other measurement
categories, such as CAT II, CAT III, CAT IV.
Do not use the equipment for measurements on mains circuits

Measurement Category Definitions

Measurement category II is for measurements performed on circuits directly connected to
the 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, socket-outlets in the fixed installation, and
equipment for industrial use and some other equipment, for example. Stationary motors
with permanent connection to the fixed installation.

Measurement category IV is for measurements performed at the source of the low-voltage
installation. Examples are electricity meters and measurements on primary over current
protection devices and ripple control units.

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User Manual V

Working Environment

Temperature

Operating: 10℃ to +40℃
Non-operation:-20℃ to +70℃
Humidity
Under +35℃:≤90% relative humidity
+35℃ to +40℃: ≤60% relative humidity

WARNING

To avoid short circuit inside the instrument or electric shock, please do not
operate in humid environment.

Altitude

Operating: less than 3 Km
Non-operation: less than 15 Km

Degree of protection

IP20

Installation (over voltage) Category

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

WARNING

Make sure that no over voltage (such as that caused by thunderbolt) can reach
the product, or else the operator might expose to the danger of electric shock.

Installation (over voltage) Category Definitions

Installation (over voltage) category I refers to signal level which is applicable to equipment
measurement terminals connected to the source circuit. In these terminals, precautions
are done to limit the transient voltage to the corresponding low level.
Installation (over voltage) category II refers to the local power distribution level which is
applicable to equipment connected to the AC line (AC power).

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Ventilation Requirement

This oscilloscope uses a fan for cooling. Please make sure that the air intake and
exhaust areas are free from obstructions and have free air. When using the oscilloscope
in a bench-top or rack setting, provide at least 10 cm clearance beside, above and behind
the instrument for adequate ventilation.

WARNING

Inadequate ventilation may cause temperature increase which would damage
the instrument. So please keep the instrument well ventilated during operation
and inspect the intake and fan regularly.

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User Manual VII

General Care and Cleaning

Care

Do not store or leave the instrument in direct sunshine for long periods of time.

WARNING

To avoid damage to the instrument or probe, please do not leave them in fog,
liquid, or solvent.

Cleaning

Please perform the following steps to clean the instrument and probe regularly according
to its operating conditions.

1. Disconnect the instrument from all power sources, and then clean it with a soft wet
cloth.

2. Clean the loose dust on the outside of the instrument and probe with a soft cloth.
When cleaning the LCD, take care to avoid scarifying it.

WARNING

To avoid damage to the surface of the instrument and probe, please do not
use any corrosive liquid or chemical cleanser.

WARNING

Make sure that the instrument is completely dry before restarting it to avoid
short circuits or personal injuries.

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Document Overview

This manual describes how to use the digital oscilloscope in detail.

Quick Start

Set the Vertical System

Set the Horizontal System

Set the Sampling System

of the oscilloscope.

Trigger the Oscilloscope

Serial Trigger

Save Reference Waveforms

How To Make Math Operations

How To Make Cursor Measurements

How To Use Measurement Functions

to measure the waveform parameters.

Display Settings

display.

Save and Recall

System Settings

Provide information about preparation before
using the instrument and a brief introduction to
the instrument.
Introduce the functions of the vertical system of
the oscilloscope.
Introduce the functions of the horizontal system
of the oscilloscope.
Introduce the functions of the sampling system

Introduce the trigger mode, trigger coupling,
trigger hold off, external trigger and various
trigger types of the oscilloscope.
Introduce how to trigger on serial input signals.

Introduce how to save and display REF
waveforms.
Introduce the math operation function of the
oscilloscope.
Introduce how to use cursors to make
measurements.
Introduce how to use the measurement function

Introduce how to set up the oscilloscope

Introduce how to save and recall the
measurement result and the settings of the
oscilloscope.
Introduce how to adjust the system setup.

Default

Troubleshooting

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Introduce the Default setup of the oscilloscope

Introduce how to deal with common failures of
the oscilloscope.

User Manual IX

Table of Content

Copyright and Declaration .............................................................................................................I

Safety Information..........................................................................................................................II

General Safety Summary...........................................................................................................II

Safety Terms and Symbols....................................................................................................... IV

Measurement Category ........................................................................................................... V

Working Environment ............................................................................................................. VI

Ventilation Requirement........................................................................................................ VII

General Care and Cleaning.................................................................................................... VIII

Document Overview......................................................................................................................IX

Quick Start.......................................................................................................................................1

General Inspection....................................................................................................................2

Appearance and Dimensions ....................................................................................................3

To Prepare the Oscilloscope for Use .........................................................................................5

To Adjust the Supporting Legs......................................................................................5

To Connect to Power Supply ........................................................................................6

Power-on Inspection ......................................................................................................7

To Connect the Probe....................................................................................................7

Function Inspection........................................................................................................8

Probe Compensation.....................................................................................................9

Front Panel Overview ..................................................................................................10

Rear Panel Overview...................................................................................................12

Front Panel Function Overview...............................................................................................14

Horizontal.......................................................................................................................14

Vertical ...........................................................................................................................15

Trigger............................................................................................................................16

Run Control ...................................................................................................................17

Universal Knob..............................................................................................................18

Menu...............................................................................................................................19

Help .........................................................................................................................................21

User Interface..........................................................................................................................22

To Use the Security Lock .........................................................................................................24

To Set the Vertical System .........................................................................................................25

To Enable the Channel.............................................................................................................26

To Adjust the Vertical Scale .....................................................................................................27

To Adjust the Vertical Position ................................................................................................27

To Specify Channel Coupling ...................................................................................................28

To Specify Bandwidth Limit.....................................................................................................28

To Specify Probe Attenuation Factor.......................................................................................29

To Specify channel Input Impedance ......................................................................................29

To Specify Amplitude Unit.......................................................................................................30

To Specify Deskew...................................................................................................................30

To Invert a Waveform..............................................................................................................30

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Set the Horizontal System ..........................................................................................................31

Adjust the Horizontal Scale .....................................................................................................32

Adjust Trigger Delay ................................................................................................................33

Set the Roll mode....................................................................................................................34

Use the Zoom Function ...........................................................................................................35

To Set the Sample System .........................................................................................................36

Run Control .............................................................................................................................37

Overview of Sampling .............................................................................................................38

Sampling Theory...........................................................................................................38

Sample Rate..................................................................................................................39

Oscilloscope Bandwidth and Sample Rate ..............................................................40

Select Memory Depth .............................................................................................................41

Select Sampling Mode.............................................................................................................42

Select Waveform Interpolation Method .................................................................................43

Select Acquisition Mode .........................................................................................................45

Normal ............................................................................................................................45

Peak Detect .....................................................................................................................46

Average............................................................................................................................47

High Resolution ...............................................................................................................48

Change the Horizontal Format ................................................................................................49

Use Sequence Mode ...............................................................................................................50

To Trigger the Oscilloscope ........................................................................................................52

Trigger Source .........................................................................................................................54

Trigger Mode...........................................................................................................................55

Trigger Level ............................................................................................................................56

Trigger Coupling ......................................................................................................................57

Trigger Holdoff ........................................................................................................................58

Noise Rejection .......................................................................................................................59

Trigger Type.............................................................................................................................61

Edge Trigger..................................................................................................................62

Slope Trigger.................................................................................................................63

Pulse Trigger .................................................................................................................65

Video Trigger.................................................................................................................67

Window Trigger.............................................................................................................70

Interval Trigger..............................................................................................................73

DropOut Trigger............................................................................................................75

Runt Trigger...................................................................................................................77

Pattern Trigger ..............................................................................................................79

Serial trigger and decode............................................................................................................81

I2C Trigger and Serial Decode .................................................................................................82

Setup for I2C Signals........................................................................................................82

I2C Triggering...................................................................................................................84

I2C Serial Decode ............................................................................................................88

SPI Triggering and Serial Decode.....................................................................................................90

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User Manual XI

Setup for SPI Signals...................................................................................................90

SPI Triggering ...............................................................................................................93

SPI Serial Decode........................................................................................................95

UART/RS232 Triggering and Serial Decode .....................................................................................97

Setup for UART/RS232 Signals .................................................................................97

UART/RS232 Triggering....................................................................................................99

UART/RS232 Serial Decode ...........................................................................................101

CAN Trigger and Serial Decode .............................................................................................103

Setup for CAN Signals....................................................................................................103

CAN Triggering...............................................................................................................105

CAN Serial Decode.........................................................................................................107

LIN Triggering and Serial Decode ..........................................................................................109

Setup for LIN Signals.................................................................................................109

LIN Triggering ................................................................................................................110

LIN Serial Decode ..........................................................................................................112

To Save Reference Waveform..................................................................................................114

To Save REF Waveform to Internal Memory .........................................................................115

To Display REF Waveform......................................................................................................115

To Adjust REF Waveform Display...........................................................................................116

To Clear REF Waveform Display.............................................................................................117

To Make Math Operation...........................................................................................................118

Units for Math Waveforms....................................................................................................118

Math Operators.....................................................................................................................119

Addition or Subtraction.................................................................................................119

Multiplication and Division ...........................................................................................120

FFT Operation................................................................................................................121

Math Function Operation......................................................................................................124

Differentiate ..................................................................................................................124

Integrate........................................................................................................................125

Square Root...................................................................................................................126

To Make Cursors Measurements.............................................................................................128

X Cursors ...............................................................................................................................128

Y Cursors................................................................................................................................128

To Make Cursor Measurements ............................................................................................129

To Make Measurements................................................................................................................130

Type of Measurement...........................................................................................................131

Voltage Measurements .................................................................................................131

Time Measurements .....................................................................................................133

Delay Measurements ....................................................................................................134

To Make Automatic Measurement........................................................................................135

To Clear Measurement Parameters.......................................................................................137

To Make All Measurement ....................................................................................................137

Display Setting...............................................................................................................................138

To Set Display Type................................................................................................................139

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To Set Color Display...............................................................................................................140

To Set and Clear Persistence .................................................................................................140

To clear the display................................................................................................................141

To Select Grid Type................................................................................................................142

To Adjust Waveform Intensity...............................................................................................142

To Adjust Grid Brightness......................................................................................................143

To Adjust Transparence .........................................................................................................143

Save and Recall..............................................................................................................................144

Save Type...............................................................................................................................145

Internal Save and Recall ........................................................................................................147

External save and recall.........................................................................................................148

Disk Management .................................................................................................................151

To Create a New File or Folder......................................................................................152

To delete a file or folder ................................................................................................153

Digital Channels(Option) ...........................................................................................................154

To Connect the Digital Probes to the Device-under-test.......................................................155

Acquiring Waveform Using the Digital Channels...................................................................156

To Change the Display Type of the Digital Channels .............................................................156

To Switch a Single Channel On or Off....................................................................................157

To Switch All Digital Channels On or Off................................................................................157

To Change the Logic Threshold for Digital Channels .............................................................158

To Reposition a Digital Channel.............................................................................................158

To Display Digital Channels as a Bus......................................................................................159

System Function Setting................................................................................................................160

To View the System Status ....................................................................................................161

To Do Self Calibration............................................................................................................162

To Enable or Disable the Sound ............................................................................................163

To Specify the Language........................................................................................................163

To Do Pass/Fail Test ...............................................................................................................164

To Set and Perform Pass/Fail Test..................................................................................165

To Save and Recall Test Mask ........................................................................................166

Arbitrary Waveform Generator(Option) ...............................................................................168

Output...........................................................................................................................169

...............................................................................................................................169

Setting ...........................................................................................................................171

Systems .........................................................................................................................173

Remove Device..............................................................................................................174

IO Set.....................................................................................................................................175

To Set the USB Device ...................................................................................................175

To Set the LAN ...............................................................................................................176

To Set the WLAN (Option) .............................................................................................177

To Set Aux Output .........................................................................................................178

To Use the Web Server..........................................................................................................179

To Update Firmware and Configuration................................................................................180

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User Manual XIII

Do Self Test............................................................................................................................181

Screen Test ....................................................................................................................181

Keyboard Test................................................................................................................182

LED Test .........................................................................................................................183

To specify Screen Saver Time ................................................................................................184

To Use the Expand Setting.....................................................................................................185

To Use the Power On Line .....................................................................................................185

Option Management.............................................................................................................186

Search............................................................................................................................................188

Setting ...................................................................................................................................188

Results...................................................................................................................................189

Navigate ........................................................................................................................................191

Time navigate........................................................................................................................191

History frame navigate..........................................................................................................191

Search event navigate ...........................................................................................................191

Bode Plot.......................................................................................................................................193

Perform Bode Plot application..............................................................................................193

Setting ...................................................................................................................................193

To Use the History Function..........................................................................................................196

Factory Setup ................................................................................................................................198

Troubleshooting ............................................................................................................................202

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Content of Figure

Figure 1 Front V iew (2-channel scope) .....................................................................................3

Figure 2 Top View (2-channel scope)........................................................................................3

Figure 3 Front V iew (4-channel scope) .....................................................................................4

Figure 4 Top View (4-channel scope)........................................................................................4

Figure 5 Adjust the Supporting Legs .........................................................................................5

Figure 6 To Connect to Power Supply .......................................................................................6

Figure 7 Function Inspection.....................................................................................................8

Figure 8 2-channel Scope Front Panel Overview......................................................................10

Figure 9 4-channel Scope Front Panel Overview......................................................................11

Figure 10 2-channel Scope Rear panel Overview.....................................................................12

Figure 11 4-channel Scope Rear panel Overview.....................................................................13

Figure 12 Help Message...........................................................................................................21

Figure 13 User Interface...........................................................................................................22

Figure 14 To Use the Security Lock ….......................................................................................24

Figure 15 Display Type Set to Dots................…........................................................................43

Figure 16 x Interpolation...........................................…............................................................44

Figure 17 Sinx/x Interpolation……............................................................................................44

Figure 18 Acquisition System ..................................................................................................45

Figure 19 Pulse With 0.1% Duty, Normal Mode ...…….............................................................46

Figure 20 Pulse With 0.1% Duty, Peak Detect Mode ..............................................................46

Figure 21 With Random Noise, Normal Mode........................................................................47

Figure 22 With Random Noise, Average Mode.......................................................................48

Figure 23 SEQUENCE Function Menu .....................................................................................50

Figure 24 HISTORY Function Menu .........................................................................................50

Figure 25 Turn off the Noise Reject.........................................................................................59

Figure 26 Turn on the Noise Reject .........................................................................................60

Figure 27 Edge Trigger.............................................................................................................62

Figure 28 Slope Trigger............................................................................................................64

Figure 29 Pulse Trigger.............................................................................................................66

Figure 30 Video Trigger...........................................................................................................69

Figure 31 Absolute Window Trigger.........................................................................................71

Figure 32 Relative Window Trigger..........................................................................................72

Figure 33 Interval Trigger.........................................................................................................74

Figure 34 Edge DropOut Trigger...............................................................................................76

Figure 35 State DropOut Trigger ..............................................................................................77

Figure 36 Runt Trigger..............................................................................................................78

Figure 37 Pattern Trigger..........................................................................................................80

Figure 38 I2C DECODE Menu ...................................................................................................82

Figure 39 I2C SIGNAL Menu.....................................................................................................82

Figure 40 I2C Trigger Menu .....................................................................................................87

Figure 41 I2C DECODE Menu ...................................................................................................88

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User Manual XV

Figure 42 SPI SIGNAL Menu .....................................................................................................91

Figure 43 SPI ClOCK Menu .......................................................................................................91

Figure 44 MISO Menu ..............................................................................................................91

Figure 45 MOSI Menu ..............................................................................................................91

Figure 46 SPI TRIG SET Menu......….……....................................................................................93

Figure 47 UART SIGNAL Menu .................................................................................................97

Figure 48 UART / RS232 Bus Config Menu...............................................................................98

Figure 49 UART TRIG SET Menu...............................................................................................99

Figure 50 UART Trigger..........................................................................................................100

Figure 51 UART / RS232 Decode.............................................................................................101

Figure 52 CAN SIGNAL Menu..................................................................................................103

Figure 53 CAN Trigger.............................................................................................................106

Figure 54 LIN SIGNAL Menu..................................................................................................109

Figure 55 LIN Trigger ..............................................................................................................111

Figure 56 LIN Decode .............................................................................................................112

Figure 57 Reference Waveform .............................................................................................116

Figure 58 Addition .................................................................................................................119

Figure 59 FFT Waveform in Split Mode ...............................................................................123

Figure 60 Differential Function Operation ..............................................................................125

Figure 61 Integral Without Offset ...........................................................................................126

Figure 62 Integral With Offset ...............................................................................................126

Figure 63 Square Root ...........................................................................................................127

Figure 64 Measure Pulse Width .............................................................................................129

Figure 65 Voltage Measurements ..........................................................................................131

Figure 66 Overshoot ..............................................................................................................132

Figure 67 Preshoot ................................................................................................................132

Figure 68 Time Measurements ...........................................................................................133

Figure 69 Select the Measurement Parameter ......................................................................135

Figure 70 Added the Measurements .....................................................................................136

Figure 71 All Parameters Measurement ................................................................................137

Figure 72 Vector Display .......................................................................................................139

Figure 73 Dots Display ...........................................................................................................139

Figure 74 Color Temperature .................................................................................................140

Figure 75 Persist Set To Infinite ..............................................................................................141

Figure 76 SAVE / RECALL File System ....................................................................................148

Figure 77 Select Save Location ..............................................................................................149

Figure 78 File Name Dialogue .................................................................................................149

Figure 79 Input Keyboard ........................................................................................................152

Figure 80 Digital Function Menu .............................................................................................156

Figure 81 Digital Channel Height ............................................................................................156

Figure 82 Digital: High Display Type ........................................................................................157

Figure 83 Digital Thresholds Function Menu .........................................................................158

Figure 84 Digtal Bus Function Menu .........................................................................................159

Figure 85 Digital Bus ..............................................................................................................159

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Figure 86 System Status .........................................................................................................161

Figure 87 Do Self Cal ..............................................................................................................162

Figure 88 Pass / Fail Test ........................................................................................................164

Figure 89 AWG Menu Interface .............................................................................................169

Figure 90 Wave Type Interface ..............................................................................................169

Figure 91 Built-in Arb Interface ..............................................................................................171

Figure 92 AWG Setting Interface .............................................................................................171

Figure 93 AWG System Information Interface ....................................................................173

Figure 94 AWG Update Interface .........................................................................................174

Figure 95 LAN Settings ..........................................................................................................176

Figure 96 WIFI Setting Menu .................................................................................................177

Figure 97 Web Server Interface .............................................................................................179

Figure 98 Screen Test ............................................................................................................181

Figure 99 Keyboard Test ........................................................................................................182

Figure 100 LED Test ...............................................................................................................183

Figure 101 Screen Saver Interface .......................................................................................184

Figure 102 OPTION Function menu.......................................................................................186

Figure 103 LABEL Function Menu ...........................................................................................186

Figure 104 Option Information ...............................................................................................187

Figure 105 Search Menu .........................................................................................................188

Figure 106 Search When Stopped ..........................................................................................190

Figure 107 Search When Running ...........................................................................................190

Figure 108 Bode Plot Menu ...................................................................................................193

Figure 109 Bode Plot Configure Menu ...................................................................................193

Figure 110 Bode Plot Display Menu ......................................................................................194

Figure 111 Bode Plot Data Menu ..........................................................................................195

Figure 112 Bode Plot List On ..................................................................................................195

Figure 113 History ..................................................................................................................196

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User Manual XVII

Quick Start

This chapter introduces the preparations when using the oscilloscope for the first time, the
front panel, rear panel and user interface.

The contents of this chapter:

◆ General Inspection

◆ Appearance and Dimensions

◆ To Prepare the Oscilloscope for Use

◆ Front Panel Overview

◆ Rear Panel Overview

◆ Front Panel Function Overview

◆ Back Panel Function Overview

◆ User Interface

◆ To Use the Security Lock

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User Manual 1

General Inspection

1. Inspect the shipment for damage.

Keep the shipping box and cushioning material until the contents of the shipment
have been checked for completeness and the instrument has passed both electrical
and mechanical tests.

The shipper or carrier shall be liable for the damage to instrument resulting from
shipment. Teledyne Test Tools would not be responsible for free maintenance /
rework or replacement of the unit.

2. Inspect the instrument.

In case of any damage, or defect, or failure, notify your Teledyne Test Tools sales
representative.

3. Check the Accessories

Please check the accessories according to the packing lists. If the accessories are
incomplete or damaged, please contact your Teledyne Test Tools sales
representative.

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Appearance and Dimensions

Figure 1 Front View (2-channel scope)

Figure 2 Top View (2-channel scope)

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User Manual 3

Figure 3 Front View (4-channel scope)

Figure 4 Top View (4-channel scope)

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To Prepare the Oscilloscope for Use

To Adjust the Supporting Legs

Adjust the supporting legs properly to use them as stands to tilt the oscilloscope upwards
for stable placement of the oscilloscope as well as better operation and observation.

Figure 5 Adjust the Supporting Legs

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User Manual 5

To Connect to the local line Power

The power requirements of the oscilloscope are 100-240 V, 50/60Hz or 100-120 V, 400Hz.
Please use the power cord supplied with the accessories to connect the oscilloscope to
the power source.

Power

socket

2-channel scope 4-channel scope

Figure 6 To Connect to Power Supply

Power

socket

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Power-on Inspection

When the oscilloscope is connected to line power, press the power key at the lower-left
corner of the front panel to start the oscilloscope. During the start-up process, the
oscilloscope performs a series of self-tests and you can hear the sound of relays
switching. After the self-test is finished, the welcome screen is displayed.

To Connect the Probe

Teledyne Test Tools provides passive probes for the oscilloscopes. For detailed

technical information of the probes, please refer to the corresponding Probe User’s Guide.

Connect the Probe:

1. Connect the probe to an oscilloscope front channel BNC.

2. Connect the probe tip to the circuit point to be tested and connect the ground alligator
clip of the probe to the circuit ground terminal.

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User Manual 7

Function Inspection

1. Press the Default button on the front panel to restore the instrument to its default
configuration.

2. Connect the ground alligator clip of the probe to the “Ground Terminal” under the
probe compensation signal output terminal.

Compensation Signal Output Terminal
Ground Terminal

2-channel scope

Ground Terminal
Compensation Signal Output Terminal

4-channel scope

3. Use the probe to connect the input terminal of CH1 of the oscilloscope to the
“Compensation Signal Output Terminal” of the oscilloscope.

4. Press the Auto Setup.

5. Observe the waveform on the display. In normal condition, the display should be a
square waveform as shown in the figure below:

Figure 7 Function Inspection

6. Use the same method to test the other channels. If the square waveforms actually
shown do not match that in the figure above, please perform “Probe Compensation”

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in the next section.

WARNING

To avoid electric shock during the use of a probe, please make sure that the
insulated wire of the probe is in good condition and do not touch the metallic

part of the probe when the probe is connected to a high voltage source

Probe Compensation

When the probes are used for the first time, you should compensate the probes to match
the input channels of the oscilloscope. Non-compensated or poorly compensated probes
may cause measurement inaccuracy or error. The probe compensation procedures are as
follows.

1. Set the switch to 10X on the probe.

2. Perform steps 1, 2, 3 and 4 of “Function Inspection” in the previous section.

3. Check the waveforms displayed and compare them with the following:

Over Perfectly Under

Compensated Compensated Compensated

4. Use a nonmetallic screwdriver to adjust the low-frequency compensation adjustment
hole on the probe until the waveform displayed is as the “Perfectly compensated”
waveform in the figure above.

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Front Panel Overview

3

7

10

9

13

14

12

2

1

18

11

Figure 8 2-channel Scope Front Panel Overview

NO. Description NO. Description

1 LCD Display 8 Vertical Control
2 Universal Knob 9 Probe Compensation/ Ground Terminal
3 Common Function Menus 10 Analog Channel and Ext Input
4 Run/Stop 11 USB Host
5 Auto Setup 12 Menu Softkey
6 Trigger Control 13 Menu on/off
7 Horizontal Control 14 Power Button

4

5

6

10 User Manual

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4

2

3

8

1

6

9

5
7

10

13

12

14

18

19

15

20

21

16

11

17

Figure 9 4-channel Scope Front Panel Overview

NO. Description NO. Description

1 LCD Display 12 Horizontal Control
2 Universal Knob 13 Trigger Control
3 Common Function Menus 14 Menu on/off
4 Clear Sweeps 15 Menu Softkey
5 Run/Stop 16 One- Button shortcut for Save
6 Decode 17 Analog Channel
7 Auto Setup 18 Power Button
8 Navigate 19 USB Host
9 History 20 Digital Inputs
10 Default 21 Probe Compensation/ Ground Terminal

Vertical Control, Math, REF and

11

Digital

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Rear Panel Overview

Figure 10 2-channel Scope Rear panel Overview

1. Handle

Pull up the handle vertically for easy carrying of the instrument. When you do not need
the handle, press it down.

2. Safety lock Hole

You can lock the instrument to a fixed location using the security lock (not supplied) via
the lock hole.

3. LAN

The instrument can be connected to network via this interface to perform remote
control.

4. Pass/Fail or Trigger Out

The BNC port can output a signal that reflects the current waveform capture rate of
the oscilloscope at each trigger or a pass/fail test pulse.

5. USB Device

The oscilloscope support SCPI remote control commands, user can control the
oscilloscope through this interface.

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Figure 11 4-channel Scope Rear panel Overview

1. Handle

Pull up the handle vertically for easy carrying of the instrument. When you do not need
the handle, press it down.

2. LAN

The instrument can be connected to network via this interface to perform remote
control.

3. USB Device

The oscilloscope support SCPI remote control commands, user can control the
oscilloscope through this interface

4. USB Host

5. Safety lock Hole

You can lock the instrument to a fixed location using the security lock (not supplied) via
the lock hole.

6. AC Power Socket

AC power input connector. The power requirements of this oscilloscope are 100-240
V, 50/60/400 Hz. Use the power cord provided with the instrument to connect it to AC
power.

7. Pass/Fail or Trigger Out

The BNC port can output a signal that reflects the current waveform capture rate of
the oscilloscope at each trigger or a pass/fail test pulse.

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Front Panel Function Overview

Horizontal

4-channel scope 2-channel scope

: Quickly enter the roll mode. The timebase range is from 50mS/div to

100S/div.

: Enable or disable search function. This function can search for the events
that users specify in the acquired data, the results are displayed with a white
triangle symbol.

Horizontal Position Knob : adjust horizontal position. The trigger point would
move left or right relative to the center of the screen when you turn the knob. During the
modification, waveforms of all the channels would move left or right and the trigger
position message at the upper-right corner of the screen would change accordingly. Press
down this knob to quickly reset the trigger delay to Zero.

Horizontal Scale Knob : adjust the horizontal time base. Turn clockwise to
reduce the time base and turn counterclockwise to increase the time base. During the
modification, waveforms of all the channels will be displayed in expanded or compressed
mode and the time base message at the upper-left side of the screen would change
accordingly. Press down this knob to quickly turn on Zoom function.

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Vertical

2-channel scope 4-channel scope

: Analog input channels. The two channels are marked by different colors which

are also used to mark both the corresponding waveforms on the screen and
the channel input connectors.

Vertical Position Knob : adjust the vertical position of the current channel
waveform. Turn clockwise to increase the position and turn counterclockwise to decrease.
During the modification, the waveform would move up and down and the position
message at the lower-left corner of the screen would change accordingly. Press down this
knob to quickly reset the vertical position to zero.

Vertical Variable Knob : adjust the vertical scale of the current channel. Turn
clockwise to decrease the scale and turn counterclockwise to increase. During the
modification, the amplitude of the waveform would enlarge or reduce and the scale
information at the right side of the screen would change accordingly. Press down this knob
to quickly switch the vertical scale adjustment modes between “Coarse” and “Fine”.

: press the button to enter the MATH function menu. The oscilloscope provides

addition, subtraction, multiplication, FFT, differential, integral and square root
operations.

: press the button to enter the REF function menu. A reference waveform can

be displayed and compared against other waveforms.

Press the button to open the digital channel function menu (Optional function).
The T3DSO1x04 (4-channel scope) supports 16 digital channels.

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Trigger

2-channel scope 4-channel scope

: press the button to enter the TRIGGER function menu. The oscilloscope
provides abundant advanced trigger functions

: press the button to set the trigger mode to Auto.

: press the button to set the trigger mode to Normal.

: press the button to set the trigger mode to Single.

Trigger Level Knob : adjust the trigger level. Turn clockwise to increase the
level and turn counterclockwise to reduce the level. During the modification, the trigger
level line would move up and down and the value in the trigger level message box at the
up-right corner of the screen would change accordingly. Press down the knob to quickly
reset the trigger level to center of the waveform.

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Run Control

: press this key to enable the waveform auto setting function. The

oscilloscope will automatically adjust the vertical scale, horizontal time base
and trigger mode according to the input signal to realize optimum waveform
display.

: press the button to set the acquisition state to Run or Stop.

In RUN state, the key is illuminated in yellow.
In STOP state, the key is illuminated in red.

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Universal Knob

1. Adjust the waveform intensity.

You can press the Display/Persist button; press the Next Page softkey to go to the
second page of the DISPLAY function menu; press the Intensity softkey and then
turn the Universal Knob to adjust the waveform intensity.

2. Select the desired submenu.

In menu operation, press any menu softkey and turn the Universal Knob to select the
desired submenu under the menu and push down the knob to confirm the current
submenu. Turn clockwise to move up the submenu and counterclockwise to move
down.

3. Modify parameters.

After having chosen a parameter, turn the Universal Knob to modify the value. Turn
clockwise to increase the value and counterclockwise to reduce. In addition, it can
also be used to adjust scale and offset of MATH and REF.

4. Choose file or directory or input filename.

After having entered the file system, turn the Universal Knob to select the desired file
or directory. When inputting filename, turn the Universal Knob to select the desired
character and the push the knob to confirm.

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Menu

2-channel scope common function panel

4-channel scope common function panel

: Press the button to enter the CURSOR function menu. The oscilloscope

provides manual and track cursor mode.

: Press the button to enter the DISPLAY function menu and quickly enable the

persist function. User can set the grid, intensity, graticule, transparence.

: Press the button to enter the UTILITY function menu to look at the system

status, do self calibration, set the sound, language and so on.

: The button is a shortcut key for clear function. When the measurement

statistics is ON, press the button to clear the count and recount it. When
persist is enabled, press the button to clear persist.

: Press the button to enter the MEASURE function menu to set the

measurement parameters, all measurements, statistics and set the gate.

: Press the button to enter the ACQUIRE function menu to set the acquisition

mode, memory depth, wave interpolation and so on.

: Press the button to enter the SAVE/RECALL function menu to save setups,

waveforms, pictures, or CSV files to internal memory or USB flash driver.

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User Manual 19

: Press the button to reset the oscilloscope to user default setup.

: Press the button to enter the history mode. In history mode, it can record up

to 80,000 waveforms. If the sequence function is enabled, it will only record
the waveforms which you set, the most you can set is 80,000.

: Press the button to enter the DECODE function menu. The oscilloscope

supports I2C, SPI, UART/RS232, CAN and LIN serial bus decode.

: Press the button to turn off or turn on the navigate function. T3DSO1x04
(4-channel scope) supports three navigate types: time, search event, history
waveform.

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Help

The oscilloscope has an on line help function that supplies multi-language help
information.

You can access the help function by pressing any button for 2 seconds and a help window
will explain the function. Also all of the submenus include help information.

Figure 12 Help Message

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User Manual 21

User Interface

Figure 13 User Interface

1. Oscilloscope Display

The oscilloscope display is the main area to see most of the settings and the menus.

2. Channel Label/Waveform

Different channels are marked by different colors and the color of the waveform
complies with the color of the channel.

3. Trigger Status

Available trigger status includes Ready, Auto, Stop, Arm, Trig’d.

4. Horizontal Time Base

● Represent the time per graticule on the horizontal axis on the screen.

● Use the TIMEBASE Knob to adjust the parameter. The available

range is from 1.0 ns to 100 s.

5. Trigger Position

Turn the Horizontal Position Knob to adjust the delay. Push the knob to set the
value to 0 (center of the screen) automatically.

6. Trigger Delay Label

Indicate the trigger zero time position on the waveform.

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7. Frequency Counter

Display the frequency value of the trigger channel.

8. Sampling Rate/ Memory Depth

Display the current sampling rate and memory depth. Sa means the current sampling
rate per second and Curr means the current memory depth.

9. Trigger Setup

Trigger Type : display the current trigger type. The trigger type names display
an abbreviation when the name is too long to display.
Trigger source : displays the currently trigger source. Each channel displays
in a different color.
Trigger condition : display the current trigger condition.
Trigger coupling : display the current trigger coupling. Available trigger coupling
mode: DC, AC, HF Reject, LF Reject.
Trigger level : display the current value of trigger level. Push the knob to
set the trigger to the 50% of the waveform amplitude automatically.

10. Channel Setup

Probe attenuation factor : display the current probe attenuation factor of the
channel. Available probe attenuation factors: 0.1X, 0.2X, 0.5X, 1X, …through to
2000X, 5000X, 10000X.

Input impedance: display the current input impedance of the channel. Available

Input impedance : 1MΩ.

Channel coupling : display the current channel coupling of the channel. Channel
coupling that are available: DC, AC, and GND.

Vertical Scale : display the current vertical scale of the channel per division.
Turn the Vertical Scale Knob to adjust the value.

11. Trigger Level Label

Display the position of trigger level, the trigger level indicator is colored the same as
the channel triggered on. It can move from +4.5div to -4.5div of the screen center.

12. I/O status

Indicate that the USB Host is connected.

Indicate that the LAN port is connected.

Indicate that the LAN port is disconnected.

Indicate that the WLAN port is connected.

Indicate that the WLAN port is disconnected.

13. Menu

Display the corresponding function menu of the selected button. Press the
corresponding softkey to adjust the oscilloscope.

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User Manual 23

To Use the Security Lock

If needed, you can use the security lock (not supplied) to lock the oscilloscope to
a fixed location. 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.

Security

lock hole

Figure 14 To Use the Security Lock

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To Set the Vertical System

This chapter introduces how to set the vertical system of the oscilloscope.

The contents of this chapter:

◆ To Enable the Channel

◆ To Adjust the Vertical Scale

◆ To Adjust the Vertical Position

◆ To Specify Channel Coupling

◆ To Specify Bandwidth Limit

◆ To Specify Probe Attenuation Factor

◆ To Specify channel Input Impedance

◆ To Specify Amplitude Unit

◆ To Specify Deskew

◆ To Invert a Waveform

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User Manual 25

To Enable the Channel

The oscilloscope provides 2 or 4 analog input channels and provides independent vertical
controls for each channel. This chapter takes CH1 as an example since all of the vertical
channel setting methods are the same for all other channels.

Connect a signal to the CH1 channel BNC connector; and then press the CH1 button in
the vertical control area (VERTICAL) on the front panel to enable CH1 and illuminate the
CH1 button.

The channel setting menu is displayed at the bottom of the screen and the channel label
at the right side of the screen. The information displayed in the channel label is related to
the current channel setting.

After the channel is turned on, modify the parameters such as the vertical scale, the
horizontal time base and the trigger mode according to the input signal to make the
waveform display easy to observe and measure.

Note: to turn off the channel, press the channel button until

the channel indication light is no longer illuminated.

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To Adjust the Vertical Scale

The vertical scale can be adjusted in Coarse or Fine mode.

● Coarse adjustment (take counterclockwise as an example): set the vertical scale in
1-2-5 steps namely 500uV/div, 1 mV/div, 2 mV/div, 5 mV/div, 10 mV/div …10 V/div.

● Fine adjustment: Adjust the vertical scale within a finer adjustment range to
improve vertical resolution. For example: 2 V/div, 1.98V/div, 1.96V/div, 1.94 V/div …1
V/div.

Use: If the amplitude of the input waveform is a little greater than the display full scale
under the current scale settings, and the amplitude would be too low if the next scale is
used, then fine adjustment can be used to optimise the amplitude of waveform display
to correctly view the signal details.

Press the CH1 button on the front panel; then press the Adjust softkey to select the
desired mode. Turn the VERTICAL Variable Knob to adjust the vertical scale (clockwise
to reduce the scale and counterclockwise to increase).

The scale information in the channel label at the right side of the screen will change
accordingly during the adjustment. The adjustable range of the vertical scale is related to
the probe ratio currently set. By default, the probe attenuation factor is 1X and the
adjustable range of the vertical scale is from 500uV/div to 10 V/div.

Note: push the VERTICAL Variable Knob to quickly switch between Coarse and Fine
adjustments.

To Adjust the Vertical Position

Turn the VERTICAL Position Knob to adjust the vertical position of the channel
waveform. Turn the knob clockwise to increase the vertical position and the channel
waveform moves up while counterclockwise to reduce the vertical position and the
waveform moves down. Push the knob to set the vertical position of the channel waveform
to zero.

During the adjustment, the vertical position information Volts Pos displays at the bottom of
the screen. The table below shows the range of vertical position according to the volt
scale.

Volt Scale Range of Vertical Position

500 μV/div ~ 100 mV/div ±2V

102 mV/div ~ 1 V/div ±20 V

1.02 V/div ~ 10 V/div ±200 V

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User Manual 27

To Specify Channel Coupling

Set the coupling mode to filter out the undesired signals. For example, the signal under
test is a square waveform with DC offset.

● When the coupling mode set to DC: the DC and AC components of the signal under
test can both pass into the scope measurement channel.

● When the coupling mode set to AC: the DC components of the signal under test are
blocked.

● When the coupling mode set to GND: the DC and AC components of the signal under
test are both blocked.

Press the CH1 button on the front panel; then press the Coupling softkey and turn the
Universal Knob to select the desired coupling mode. The default setup is DC.

The current coupling mode is displayed in the channel label at the right side of the screen.
You can also press the Coupling softkey continuously to switch the coupling mode.

To Specify Bandwidth Limit

Set the bandwidth limit to reduce display noise. For example, the signal under test is a
pulse with high frequency oscillation.

● When the bandwidth limit set to Full, the high frequency components of the signal
under test can pass into the scope measurement channel.

● When the bandwidth limit set to 20M, the high frequency components that exceed 20
MHz are attenuated.

Press the CH1 button on the front panel; then press the BW Limit softkey to select Full or
20M. The default setup is Full. When bandwidth limit is enabled, the character B will be
displayed in the channel label at the right side of the screen.

T3DSO1000 has full BW at all V/div settings including 500uV/div to 2mV/div.

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To Specify Probe Attenuation Factor

Set the probe attenuation factor to match the type of the probe that you are using to
ensure correct vertical readouts.

Press the CH1 button on the front panel; then press the Probe softkey and turn the
Universal Knob to select the desired value and push the knob to confirm. The default
setup is 1X.

The current probe attenuation factor is displayed in the channel label at the right side of
the screen. You can also press the Probe softkey continuously to switch the probe
attenuation factor.

The table shows the probe attenuation factor

Menu Attenuation Factor

0.1X 0.1 : 1

0.2X 0.2 : 1

0.5X 0.5 : 1
1X 1 : 1
2X 2 : 1
… …
5000X 5000 : 1
10000X 10000 : 1

To Specify channel Input Impedance

The channel input impedance is 1MΩ.

● Impedance setting to 1MΩ is for use with many passive probes and for general-

purpose measurements. The higher impedance minimizes the loading effect of the
oscilloscope on the device under test.

The current channel input impedance is displayed in the channel label at the right side of
the screen.

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User Manual 29

To Specify Amplitude Unit

Select the amplitude display unit for the current channel. The available units are V and A.
When the unit is changed, the unit displayed in the channel label will change accordingly.

1. Press CH1button on the front panel to enter the CH1 function menu.

2. Press the Next Page softkey to enter the second page of the CH1 function menu.

3. Press the Unit softkey to select the desired unit V or A.

The default setup is V.

To Specify Deskew

The valid range of each analog channel is ±100ns.

1. Press CH1button on the front panel to enter the CH1 function menu.

2. Press the Next Page softkey to enter the second page of the CH1 function menu.

3. Press the Deskew softkey. Then turn the Universal Knob to change deskew.

To Invert a Waveform

When Invert is set to On, the voltage values of the displayed waveform are inverted.
Invert affects how a channel is displayed but keeps the original trigger settings.

Inverting a channel also changes the result of any math function selected and measure
function.

1. Press CH1button on the front panel to enter the CH1 function menu.

2. Press the Next Page softkey to enter the second page of the CH1 function menu.

3. Press the Invert softkey to turn on or off the invert display.

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Set the Horizontal System

This chapter introduces how to set the horizontal system of the oscilloscope.

The contents of this chapter:

◆ Adjust the Horizontal Scale

◆ Adjust the Trigger Delay

◆ Set Roll Mode

◆ Use the Zoom Function

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User Manual 31

Adjust the Horizontal Scale

Turn the HORIZONTAL Scale Knob on the front panel to adjust the horizontal time base.
Turn clockwise to reduce the horizontal time base and turn counterclockwise to increase.

The time base information at the upper left corner of the screen will change accordingly
during the adjustment. The range of the horizontal scale is from 1ns/div to 100s/div.

The Horizontal Scale Knob works (in the Normal time mode) while acquisitions are
running or when they are stopped. When in run mode, adjusting the horizontal scale knob
changes the sample rate. When stopped, adjusting the horizontal scale knob lets you
zoom into acquired data.

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Adjust Trigger Delay

Turn the Position Knob on the front panel to adjust the trigger delay of the waveform.
During the modification, waveforms of all the channels would move left or right and the
trigger delay message at the upper-right corner of the screen would change accordingly.
Press down this knob to quickly reset the trigger delay to the center of the screen.
Changing the delay time moves the trigger point (solid inverted triangle) horizontally and
indicates how far it is from the time reference point. These reference points are indicated
along the top of the display grid.
All events displayed left of the trigger point happened before the trigger occurred. These
events are called pre- trigger information, and they show events that led up to the trigger
point.
Everything to the right of the trigger point is called post- trigger information. The amount of
delay range (pre- trigger and post- trigger information) available depends on the time/div
selected and memory depth.
The position knob works (in the Normal time mode) while acquisitions are running or when
they are stopped.

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User Manual 33

Set the Roll mode

Press the Roll button to enter the roll mode.
In Roll mode the waveform moves slowly across the screen from right to left. It only
operates on time base settings of 50 ms/div and slower. If the current time base setting is
faster than the 50 ms/div limit, it will be set to 50 ms/div when Roll mode is entered.
In Roll mode there is no trigger. The fixed reference point on the screen is the right edge
of the screen and refers to the current moment in time. Events that have occurred are
scrolled to the left of the reference point. Since there is no trigger, no pre- trigger
information is available.
If you would like to stop the display in Roll mode, press the Run/Stop button. To clear the
display and restart an acquisition in Roll mode, press the Run/Stop button again.
Use Roll mode on low- frequency waveforms to yield a display much like a strip chart
recorder. It allows the waveform to roll across the display.

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Use the Zoom Function

Zoom is a horizontally expanded version of the normal display. You can use Zoom to
locate and horizontally expand part of the normal window for a more detailed (higher­resolution) analysis of signals.

Press the HORIZONTAL Scale Knob on the front panel to turn on the zoom function, and
press the button again to turn off the function. When Zoom function is on, the display
divides in half. The top half of the display shows the normal time base window and the
bottom half displays a faster Zoom time base window.

Normal time base Zoom time base

The area of the normal display that is expanded is outlined with a box and the rest of the
normal display has a grey mask. The box shows the portion of the normal sweep that is
expanded in the lower half.
To change the time base for the Zoom window, turn the Horizontal Scale Knob. The
Horizontal Scale Knob controls the size of the box. The Horizontal Position Knob sets
the left- to- right position of the zoom window. The delay value, which is the time displayed
relative to the trigger point is momentarily displayed in the upper- right corner of the
display when the Horizontal Position Knob is turned. Negative delay values indicate
you're looking at a portion of the waveform before the trigger event, and positive values
indicate you're looking at the waveform after the trigger event.
To change the time base of the normal window, turn off Zoom; then, turn the Horizontal
Scale Knob.

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User Manual 35

To Set the Sampling System

This chapter introduces how to use the run control and set the sampling system of the
oscilloscope.

The contents of this chapter:

◆ Run Control

◆ Overview of Sampling

◆ To Specify Memory Depth

◆ To Select Sampling Mode

◆ Waveform Interpolation Method

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Run Control

Press the Run/Stop or Single button on the front panel to run or stop the sampling
system of the scope.

● When the Run/Stop is green, the oscilloscope is running, that is, acquiring data
when trigger conditions are met. To stop acquiring data, press the Run/Stop button.
When stopped, the last acquired waveform is displayed.

● When the Run/Stop button is red, data acquisition is stopped. Red "Stop" is
displayed in the status line at the top of the display. To start acquiring data, press
Run/Stop.

● To capture and display a single acquisition (whether the oscilloscope is running or
stopped), press Single. The Single run control lets you view single- shot events
without subsequent waveform data overwriting the display. Use Single when you
want maximum memory depth for pan and zoom.

When you press Single, the display is cleared, the trigger mode is temporarily set to
Normal (to keep the oscilloscope from auto- triggering immediately), the trigger circuitry is
armed, the Single key is illuminated, and the oscilloscope waits until a user defined
trigger condition occurs before it displays a waveform.

When the oscilloscope triggers, the single acquisition is displayed and the oscilloscope is
stopped (the Run/Stop button is illuminated in red).

Press Single again to acquire another waveform

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User Manual 37

Overview of Sampling

To understand the oscilloscope's sampling and acquisition modes, it is helpful to
understand sampling theory, sample rate and oscilloscope bandwidth and sample rate.

Sampling Theory

The Nyquist sampling theorem states that for a limited bandwidth (band- limited) signal
with maximum frequency f
than twice the maximum frequency f
reconstructed without aliasing.
f

= f

MAX

= Nyquist frequency (fN) = folding frequency

S/2

, the equally spaced sampling frequency fS must be greater

MAX

, in order to have the signal be uniquely

MAX

38 User Manual

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Sample Rate

The maximum sample rate of the oscilloscope is 2GSa/s. The actual sample rate of the
oscilloscope is determined by the horizontal scale. Turn the Horizontal Scale Knob to
adjust the sample rate.
The actual sample rate is displayed in the information area at the upper- right corner of the
screen.
The influence on the waveform when the sample rate is too low:

1. Waveform Distortion: when the sample rate is too low, some waveform details are

lost and the waveform displayed is rather different from the actual signal.

2. Waveform Aliasing: when the sample rate is lower than twice the actual signal

frequency (Nyquist Frequency), the frequency of the waveform rebuilt from the sample
data is lower than the actual signal frequency. The most common aliasing is the jitter
on a fast edge.

3. Waveform Leakage: when the sample rate is too low, the waveform rebuilt from the

sample data does not reflect all the actual signal information.

Pulse disappeared

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User Manual 39

Oscilloscope Bandwidth and Sample Rate

An oscilloscope's bandwidth is typically described as the lowest frequency at which input
signal sine waves are attenuated by 3 dB (- 30% amplitude error).
At the oscilloscope bandwidth, sampling theory says the required sample rate is fS = 2fBW.
However, the theory assumes there are no frequency components above f
case) and it requires a system with an ideal brick- wall frequency response.

0dB

-3dB

Attenuation

(fBW in this

MAX

fN f

S

Frequency
However, digital signals have frequency components above the fundamental frequency
(square waves are made up of sine waves at the fundamental frequency and an infinite
number of odd harmonics), and typically, for 500 MHz bandwidths and below,
oscilloscopes have a Gaussian frequency response.

0dB

-3dB

Attenuation

Aliased frequency

components

fS/4 fN f

S

Frequency

Limiting oscilloscope bandwidth (fBW) to 1/4 the sample rate (fS/4)
reduces frequency components above the Nyquist frequency (fN).

So, in practice, an oscilloscope's sample rate should be four or more times its
bandwidth: fS = 4fBW. This way, there is less aliasing, and aliased frequency
components have a greater amount of attenuation.

40 User Manual

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Select Memory Depth

Memory depth refers to the number of waveform points that the oscilloscope can store in a
single trigger sample and it reflects the storage ability of the sample memory. The
oscilloscope provides up to 14 Mpts memory depth.
Press the Acquire button on the front panel; press the Mem Depth softkey and then turn
the Universal Knob to select the desired value and push down the knob to confirm. Press
the Mem Depth softkey continually can also select the desired value.
The actual memory depth is displayed in the information area at the upper- right corner of
the screen. Memory depths that are available: 14K, 140K, 1.4M, 14M.
Since the oscilloscope has two acquisition memories, when only one channel is on, the
maximal memory depth is up to 14 Mpts.
The relation of memory depth, sample rate and waveform length fulfils the equation
below:
Memory depth = sample rate (Sa/s) × waveform length (s/div × div)

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Select Sampling Mode

The oscilloscope only supports real-time sampling. In this mode, the oscilloscope samples
and displays a waveform within a trigger event. The maximum real-time sample rate is
1GSa/s.

Press the RUN/STOP button to stop the sampling, the oscilloscope will hold the last
display. At this point, you can still use the vertical control and horizontal control to pan and
zoom the waveform.

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Select Waveform Interpolation Method

Under real-time sampling, the oscilloscope acquires the discrete sample values of the
waveform being displayed. In general, a waveform of dots display type is very difficult
to observe. In order to increase the visibility of the signal, the digital oscilloscope
usually uses the interpolation method to display a waveform.

Interpolation method is a processing method to “connect all the sampling points”, and
uses the points to calculate the whole appearance of the waveform. For real-time
Sampling, interpolation method is used, even if the oscilloscope is in a single capture
mode and only a small number of sampling points are captured. The oscilloscope can
use interpolation for filling in the gaps between points to reconstruct an accurate
waveform.

Press the Acquire button on the front panel to enter the ACQUIRE Function menu; then
press the Interpolation softkey to select Sinx/x or X.

● X: The adjacent sample points are directly connected with a straight line. This

method is only used to rebuild on the fast edge of signals, such as a square wave.

● Sinx/x: Connecting the sampling points with curves has greater versatility. Sinx/x

interpolation method uses mathematical processing to calculation results in
between the actual sample points. This method smoothes the signal waveform,
and gives it a more realistic regular shape than straight line connected sample
points. When the sampling rate is relatively low, less than 5 times the bandwidth
of the highest frequency of the waveform, it is recommended to use the Sinx/s
interpolation method.

Figure 15 Display Type Set to Dots

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Figure 16 x Interpolation

Figure 17 Sinx/x Interpolation

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Select Acquisition Mode

The acquisition mode is used to control how to generate waveform points from sample
points. The oscilloscope provides the following acquisition mode: Normal, Peak Detect,
Average and High Resolution.

1. Press the Acquire button on the front panel to enter the ACQUIRE function menu;

2. Press the Acquisition softkey; then turn the Universal Knob to select the desired

acquisition mode and push down the knob to confirm. The default setup is Normal.

Normal

In this mode, the oscilloscope samples the signal at equal time interval to rebuild the
waveform. For most of the waveforms, the best display effect can be obtained using this
mode. It is the default acquisition mode.

Figure 18 Acquisition System

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Peak Detect

In this mode, the oscilloscope acquires the maximum and minimum values of the signal
within the sample interval to get the envelope of the signal or the narrow pulse of the
signal that might be lost. In this mode, signal loss can be prevented but displayed noise
will increase.
In this mode, the oscilloscope can display all the pulses with pulse widths at least as wide
as the sample period.

Figure 19 Pulse With 0.1% Duty, Normal Mode

Figure 20 Pulse With 0.1% Duty, Peak Detect Mode

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Average

In this mode, the oscilloscope averages the waveforms from multiple acquisitions to
reduce the random noise of the input signal and improve the vertical resolution. The
greater the number of averages, the lower the noise will be, and the higher the vertical
resolution will be, but the slower the response of the displayed waveform to waveform
changes.

The available range of averages is from 4 to 1024 and the default is 16. When Average
mode is selected, press Averages and turn the universal knob or press the softkey
continually to set the desired average time.

Figure 21 With Random Noise, Normal Mode

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Figure 22 With Random Noise, Average Mode

High Resolution

This mode uses a linear averaging technique to average the neighbouring points of the
sample waveform to reduce the random noise on the input signal and generate much
smoother waveforms on the screen.

High Resolution mode can be used on both single shot and repetitive signals, and it does
not slow waveform update. This mode limits the oscilloscope's real time bandwidth
because it effectively acts like a low pass filter.

Note: “Average” and “High Res” modes use different averaging methods. The former uses
“Waveform Average” and the latter uses “Linear Average”.

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Change the Horizontal Format

Press the Acquire button on the front panel; then press the XY soft key to set the XY(On)
or YT(Off) mode. The default setup is YT.

YT

It is the normal viewing mode for the oscilloscope. In the Normal time mode, signal events
occurring before the trigger are shown to the left of the trigger point and signal events
after the trigger point are displayed to the right of the trigger point.

XY

XY mode changes the display from a volt- versus- time display to a volt- versus- volt
display. Channel 1 amplitude is plotted on the X- axis and Channel 2 amplitude is plotted
on the Y- axis, the two channels will be turned on or off together.
You can use XY mode to compare frequency and phase relationships between two
signals. XY mode can also be used with transducers to display strain versus displacement,
flow versus pressure, volts versus current, or voltage versus frequency.
The phase deviation between two signals with the same frequency can be easily
measured via Lissajous method. The figure below shows the measurement schematic
diagram of the phase deviation

According to sinθ=A/B or C/D (wherein, θ is the phase deviation angle between the two
channels and the definitions of A, B, C and D are as shown in the figure above), the phase
deviation angle is obtained, that is: θ=±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).

X-Y function 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.

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Use Sequence Mode

Sequence is also an acquisition mode, which does not display a waveform during the
sampling process. This improves the waveform capture rate, to a maximal capture rate of
400,000 wfs/s. So it can capture the small probability events effectively. The oscilloscope
runs and fills a memory segment for each trigger event. The oscilloscope screen is not
updated whilst the oscilloscope is busy acquiring multiple segments. The oscilloscope
continues to trigger until memory is filled, and then displays the waveforms on the screen.

To use the sequence mode, the HORIZONTAL Format must be set to YT.

Do the following steps to use the sequence mode.

1. Press the Acquire button on the front panel to enter the ACQUIRE function menu;

2. Press the Sequence softkey to enter the SEQUENCE function menu.

Figure 23 SEQUENCE Function Menu

3. Press the Segments Set softkey; and then turn the Universal Knob to select the

desired value.

Do the following steps to replay the sequence waveform under history mode:

1. Press the History softkey to enable HISTORY function .

Figure 24 HISTORY Function Menu

2. Press the List softkey to turn on the list display. The list records the acquisition time of
every frame and shows the frame number that is displaying on the screen.

3. Press the Frame No. softkey; and then turn the Universal Knob to select the frame to
display.

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4. Press the softkey to replay the waveform from the current frame to 1.

5. Press the softkey to stop replay.

6. Press the softkey to replay the waveform from the current frame to the last
frame.

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To Trigger the Oscilloscope

For triggering, set your trigger conditions according to the requirements, and when a
waveform in the waveform stream meets this condition, the oscilloscope captures the
waveform and displays it on the screen. The trigger circuit ensures that every
acquisition centers around the user-defined trigger condition.

The following is the schematic diagram of the acquisition memory. As shown in the figure
below, the position of the trigger event is determined by the reference time point and the
delay setting.

Trigger Event

↓

Pre-trigger Buffer Post-trigger Buffer

Acquisition Memory

Trigger settings should be based on your requirements and the features of the input
signal, thus you need to have some knowledge of the signal under test to quickly capture
the desired waveform.

The oscilloscope provides abundant advanced trigger functions which can help you to
focus on the desired waveform details. These trigger types are edge, slope, pulse,
video, window, interval, dropout, runt, pattern and serial trigger. This chapter will
introduce all these trigger functions and tell you how to set the trigger conditions to
capture the desired waveform.

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The contents of this chapter:

◆ Trigger Source

◆ Trigger Mode

◆ Trigger Level

◆ Trigger Coupling

◆ Trigger Holdoff

◆ Noise Rejection

◆ Trigger Type

● Edge Trigger

● Slope Trigger

● Pulse Trigger

● Video Trigger

● Window Trigger

● Interval trigger

● DropOut Trigger

● Runt Trigger

● Pattern Trigger

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Trigger Source

The 2-channel oscilloscope’s trigger source includes analog channels, EXT, EXT/5 and
AC Line.

The 4-channel oscilloscope’s trigger source includes analog channels and AC Line.

Press the Setup button on the front panel to enter the TRIGGER function menu; press the
Source softkey and then turn the Universal Knob to select the desired trigger source.

The current trigger source is displayed at the upper right corner of the screen. Select
a channel with a signal input as the trigger source to obtain a stable trigger.

Analog channel input:

All signals from the analog channels can all be used as the trigger source, no matter
whether the channel selected is enabled, or not.

External trigger input:

External trigger source can be used to connect an external trigger signal to the EXT TRIG
channel if required. The trigger signal (such as an external clock or signal of the circuit to
be tested) will be connected to EXT and EXT/5 trigger source via the [EXT TRIG]
connector. EXT/5 trigger source attenuates the signal by a factor of 5. It extends the trigger
voltage level.

AC line:

The trigger signal is obtained from the AC power input of the oscilloscope. These kinds
of signals can be used to display the relationship between signal (such as an
illuminating device) and power (power supply device). For example, it is mainly used in
line frequency power related measurements.

Note: Select a stable channel waveform as the trigger source to stabilize the display.

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Trigger Mode

The oscilloscope’s trigger mode includes auto, normal and single. The Trigger Mode
affects the way in which the oscilloscope searches for the trigger.

After the oscilloscope starts running, the oscilloscope operates by first filling the
pre-trigger buffer. It starts searching for a trigger after the pre-trigger buffer is filled and
continues to flow data through this buffer while it searches for the trigger. While searching
for the trigger, the oscilloscope overflows the pre-trigger buffer and the first data put into
the buffer is first pushed out (First Input First Out, FIFO).

When a trigger is found, the pre- trigger buffer contains the events that occurred just
before the trigger. Then, the oscilloscope fills the post- trigger buffer and displays the
acquisition memory.

Press the Auto, Normal and the Single buttons on the front panel to select the desired
trigger mode, and the corresponding status light will be lit.
➢ In the Auto trigger mode (the default setting), if the specified trigger conditions are

not found, triggers are forced and acquisitions are made so that signal activity is
displayed on the oscilloscope.

The Auto trigger mode is appropriate when:

● Checking DC signals or signals with unknown levels or activity.

● When trigger conditions occur often enough that forced triggers are

unnecessary.

➢ In the Normal trigger mode, triggers and acquisitions only occur when the specified

trigger conditions are found. Otherwise, the oscilloscope holds the original waveform
and waits for the next trigger.

The Normal trigger mode is appropriate when:

● You only want to acquire specific events specified by the trigger settings.

● Triggering on an infrequent signal from a serial bus (for example, I2C, SPI, CAN,

LIN, etc.) or another signal that arrives in bursts. The Normal trigger mode lets
you stabilize the display by preventing the oscilloscope from auto- triggering.

➢ In the Single trigger mode, the oscilloscope waits for a trigger and displays the

waveform when the trigger condition is met and then stops.

The Single trigger mode is appropriate:

● To capture single event or a periodic signal.

● To capture burst or other unusual signals.

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Trigger Level

Trigger level and slope define the trigger point,

Positive Slope

Negative Slope

Trigger Level

Trigger Point Trigger Point

Input Signal

You can adjust the trigger level for a selected analog channel by turning the Trigger Level
Knob.

You can push the Trigger Level Knob to set the level to the waveform's 50% value
immediately. If AC coupling is used, pushing the Trigger Level knob sets the trigger level
to about 0 V.

The position of the trigger level for the analog channel is indicated by the trigger level icon

(if the analog channel is on) at the left side of the display. The value of the analog

channel trigger level is displayed in the upper- right corner of the display.

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Trigger Coupling

Press the Setup button on the front panel to enter the TRIGGER function menu, and then
press the Coupling softkey and turn the Universal Knob or press the Coupling softkey
continually to select the desired coupling mode.

The oscilloscope provides 4 kinds of trigger coupling modes:

● DC: allow DC and AC components into the trigger path.

● AC: block all the DC components and attenuate signals lower than 5.8 Hz. Use AC

coupling to get a stable edge trigger when your waveform has a large DC offset.

● LF Reject: block the DC components and reject the low frequency components lower

than 2.08MHz. Low frequency reject removes any unwanted low frequency
components from a trigger waveform, such as power line frequencies, etc., that can
interfere with proper triggering. Use LF Reject coupling to get a stable edge trigger
when your waveform has low frequency noise.

● HF Reject: reject the high frequency components higher 1.27MHz)

Note: trigger coupling has nothing to do with the channel coupling.

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Trigger Holdoff

Trigger holdoff can be used to stablise the trigger on complex waveforms (such as pulse
streams or burst waveforms). Holdoff by time is the amount of time that the oscilloscope
waits before re-arming the trigger circuitry. The oscilloscope will not trigger until the holdoff
time expires.

Use the holdoff to trigger on repetitive waveforms that have multiple edges (or other
events) between waveform repetitions. You can also use holdoff to trigger on the first
edge of a burst when you know the minimum time between bursts.

For example, to get a stable trigger on the repetitive pulse burst shown below, set the
holdoff time to be >200 ns but <600 ns.

Holdoff

200ns 600ns

Trigger Point

The correct holdoff setting is typically slightly less than one repetition of the waveform. Set
the holdoff to this time to generate a unique trigger point for a repetitive waveform. Only
edge trigger and serial trigger have holdoff option. The holdoff time of the oscilloscope is
adjustable from 100ns to 1.5s.

1. Press the Stop button, and then use the Horizontal Position Knob and the
Horizontal Scale Knob to find where the waveform repeats. Measure this time using
cursors; then, set the holdoff.

2. Press the Setup button on the front panel to enter the TRIGGER function menu. The
default trigger type is edge.

3. Press the Holdoff Close softkey; and then turn the Universal Knob to set the desired
holdoff time.

Note: adjust the time scale and horizontal position will not affect the holdoff time.

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Noise Rejection

Noise Reject adds additional hysteresis to the trigger circuitry. By increasing the trigger
hysteresis band, you reduce the possibility of triggering on noise. However, this also
decreases the trigger sensitivity so that a slightly larger signal is required to trigger the
oscilloscope.

Press the Setup button on the front panel, and then press the Noise Reject softkey
continually to set the option to On or Off to turn on or off the noise rejection function.

Figure 25 Turn off the Noise Reject

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Figure 26 Turn on the Noise Reject

If the signal you are probing is noisy, you can set up the oscilloscope to reduce the noise
in the trigger path and on the displayed waveform. First, stabilize the displayed waveform
by removing the noise from the trigger path. Second, reduce the noise on the displayed
waveform.

1. Connect a signal to the oscilloscope and obtain a stable display.

2. Remove the noise from the trigger path by setting trigger coupling to LF Reject, HF
Reject or turning on Noise Reject.

3. Set the Acquisition option to Average to reduce noise on the displayed waveform.

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Trigger Type

The oscilloscope provides abundant advanced trigger functions, including various serial
bus triggers.

◆ Edge trigger

◆ Slope trigger

◆ Pulse trigger

◆ Video trigger

◆ Window trigger

◆ Interval trigger

◆ DropOut trigger

◆ Runt trigger

◆ Pattern trigger

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Edge Trigger

Edge trigger distinguishes the trigger points by seeking the specified edge (rising, falling,
rising & falling) and trigger level.

Rising Edge Falling Edge

Trigger Level

Trigger Point Trigger Point

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; turn the Universal Knob to set select Edge and then push
the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select the desired trigger
source.

4. Press the Slope softkey; turn the Universal Knob to select the desired trigger edge
(rising, falling or rising & falling), and then press down the knob to confirm. The current
trigger slope is displayed at the upper right corner of the screen.

5. Turn the Trigger Level Knob to adjust the trigger level to obtain stable trigger.

Figure 27 Edge Trigger

Note: Press the Auto Setup button will set the trigger type to Edge and slope to rising.

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Slope Trigger

The slope trigger looks for a rising or falling transition from one level to another level in
greater than or less than a certain amount of time.

In the oscilloscope, positive slope time is defined as the time difference between the two
crossing points of trigger level line A and B with the positive edge as shown in the figure
below.

B

The upper limit of trigger level

A The lower limit of trigger level

Positive slope time

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; turn the Universal Knob to set select Slop and then push the
knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Slop softkey; turn the Universal Knob to set select the desired trigger edge
(rising or falling), and then push down the knob to confirm. The current trigger slope is
displayed at the upper right corner of the screen.

5. Press Lower Upper softkey to select the Lower or Upper trigger level; then turn the
Trigger Level Knob to adjust the position. The trigger level values are displayed at
the upper right corner of the screen.
The lower trigger level cannot be higher than the upper trigger level. In the trigger state
message box, L1 means the upper trigger lever while L2 means the lower trigger level.

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Figure 28 Slope Trigger

6. Press the Limit Range softkey; then turn the Universal Knob to select the desired
slope condition, and push down the knob to confirm.

● <= (less than a time value): trigger when the positive or negative slope time of the

input signal is lower than the specified time value.

● >= (greater than a time value): trigger when the positive or negative slope time of

the input signal is greater than the specified time value.

● [--,--] (within a range of time value): trigger when the positive or negative slope

time of the input signal is greater than the specified lower limit of time and lower
than the specified upper limit of time.

● --][-- (outside a range of time value): trigger when the positive or negative slope

time of the input signal is greater than the specified upper limit of time or lower
than the specified lower limit of time.

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Pulse Trigger

Trigger on the positive or negative pulse with a specified width.

Positive Pulse Width

Trigger Level

Negative Pulse Width

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; turn the Universal Knob to select Pulse and then push the
knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Turn the Trigger Level Knob to adjust the trigger level to the desired place.

5. Press the Polarity softkey to select Positive or Negative pulse to trigger on. The
current trigger polarity is displayed at the upper right corner of the screen.

6. Press the Limit Range softkey; turn the Universal Knob to select the desired
condition.

● <= (less than a time value): trigger when the positive or negative pulse time of the

input signal is lower than the specified time value.
For example, for a positive pulse, if you set t (pulse real width) < 100ns, the
waveform will trigger according to the diagram below.

● >= (greater than a time value): trigger when the positive or negative pulse time of

the input signal is greater than the specified time value.
For example, for a positive pulse, if you set t (pulse real width) >100ns, the
waveform will trigger according to the diagram below.

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● [--,--] (within a range of time value): trigger when the positive or negative pulse

time of the input signal is greater than the specified lower limit of time and lower
than the specified upper limit of time value.
For example, for a positive pulse, if you set t (pulse real width) >100ns and
t<300ns, the waveform will trigger on the 200ns pulse.

● --][-- (outside a range of time value): trigger when the positive or negative pulse

time of the input signal is greater than the specified upper limit of time and lower
than the specified lower limit of time value.

Figure 29 Pulse Trigger

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Video Trigger

Video triggering can be used to capture the complex waveforms of most standard
analog video signals. The trigger circuitry detects the vertical and horizontal interval of the
waveform and produces triggers based on the video trigger settings you have selected.
The oscilloscope supports standard video signal field or line of NTSC (National Television
Standards Committee), PAL (Phase Alternating Line) HDTV (High Definition Television)
and custom video signal trigger.

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; then turn the Universal Knob to select Video and push down
the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source. Turning the Trigger Level Knob does not change the trigger level
because the trigger level is automatically set to the sync pulse.

4. Press the Standard softkey to select the desired video standard. The oscilloscope
supports the following video standards.

Standard Type Sync Pulse
NTSC Interlaced BI-level
PAL Interlaced BI-level
HDTV 720P/50 Progressive Tri-level
HDTV 720P/60 Progressive Tri-level
HDTV 1080P/50 Progressive Tri-level
HDTV 1080P/60 Progressive Tri-level
HDTV 1080i/50 Progressive Tri-level
HDTV 1080i/50 Progressive Tri-level
Custom

The table below shows the parameters of the Custom video trigger.

Frame Rate 25Hz, 30Hz, 50Hz, 60Hz
Of Lines 300~2000
Of Fields 1, 2, 3, 4
Interlace 1:1, 2:1, 4:1, 8:1
Trigger Position Line Field

(line value)/1 1
(line value)/2 2
(line value)/3 3
(line value)/4 4
(line value)/5 5
(line value)/6 6
(line value)/7 7
(line value)/8 8

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The table below takes Of Lines as 800 as an example to explain the relation between
Of Lines, Of Fields, Interlace, Trigger Line and Trigger Field.

Of Lines Of Fields Interlace Trigger Line Trigger Field
800 1 1:1 800 1
800 1,2,4 or 8 2:1 400 1, 1~2, 1~4, 1~8
800 1,2,4 or 8 4:1 200 1, 1~2, 1~4, 1~8
800 1,2,4 or 8 8:1 100 1, 1~2, 1~4, 1~8

5. Press the Sync softkey to select Any or Select trigger mode.

● Any: trigger on any of the horizontal sync pulses

● Select: trigger on the appointed line and field you have set. Press the Line or

Field softkey; then turn the Universal Knob to set the value.

The following table lists the line numbers per field for each video standard.
Standard Field 1 Field 2
NTSC 1 to 262 1 to 263
PAL 1 to 312 1 to 313
HDTV 720P/50, HDTV 720P/60 1 to 750
HDTV 1080P/50, HDTV 1080P/60 1 to 1125
HDTV 1080iP/50, HDTV 1080i/60 1 to 562 1 to 563

The following are exercises to familiarize you with video triggering.

● To trigger on a specific line of video

● To use Custom video trigger

To Trigger on a Specific Line of Video

Video triggering requires greater than 1/2 division of sync amplitude with any analog
channel as the trigger source.
The example below set to trigger on field 2, line 124 using the NTSC video standard.

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; then use the Universal Knob to select Video and push down
the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 as the trigger source,
and press the knob to confirm.

4. Press the Standard softkey; turn the Universal Knob to select NTSC, and press the
knob to confirm.

5. Press the Sync softkey and set the option to Select; press the Line softkey and then
turn the universal to select 022 and push the knob to confirm; press the Field softkey
and then turn the Universal Knob to select 1 and push the knob to confirm.

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Figure 30 Video Trigger

To Use Custom Video Trigger

Custom video trigger supports frame rate of 25Hz, 30Hz, 50Hz and 60Hz, and the line
range is available from 300 to 2000. The steps below show how to set custom trigger.

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; then use the Universal Knob to select Video and push down
the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 as the trigger
source, and push down the knob to confirm.

4. Press the Standard softkey; turn the Universal Knob to select Custom, and push
down the knob to confirm.

5. Press the Setting softkey to enter the custom setting function menu. Press the
Interlace softkey; turn the Universal Knob to select the desired value.

6. Press the Of Field softkey; turn the Universal Knob to select the desired value.

7. Press the Sync softkey to enter the TRIG ON menu to set the line and field.

● Press the Type softkey to select Select or Any.

● If the Type option set to Select, press the Line softkey; turn the Universal Knob

to select the desired value. Press the Field softkey; turn the Universal Knob to
select the desired value.

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Window Trigger

Window trigger provides a high trigger level and a low trigger level. The instrument
triggers when the input signal passes through the high trigger level or the low trigger level.

There are two kinds of window types: Absolute and Relative. They have different trigger
level adjustment methods. Under Absolute window type, the lower and the upper trigger
levels can be adjusted respectively via the Level knob; under Relative window type, adjust
the Center value to set the window center; adjust the Delta value to set the window range,
the lower and the upper trigger levels always move together.

Horizontal Trigger Position

High Level

Low Level

● If the lower and the upper trigger levels are both within the waveform amplitude range,

the oscilloscope will trigger on both rising and falling edge.

● If the upper trigger level is within the waveform amplitude range while the lower

trigger level is out of the waveform amplitude range, the oscilloscope will trigger on
rising edge only.

● If the lower trigger level is within the waveform amplitude range while the upper

trigger level is out of the waveform amplitude range, the oscilloscope will trigger on
falling edge only.

To set window trigger via Absolute window type:

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; then use the Universal Knob to select Window and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Window Type softkey to select Absolute.

5. Press the Lower Upper softkey to select Lower or Upper trigger level; then turn the
Trigger Level Knob to adjust the position. The trigger level values are displayed at
the upper right corner of the screen.
The Lower trigger level cannot be higher than the upper trigger level. In the trigger
state message box, L1 means the upper trigger level while L2 means the lower trigger
level.

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Figure 31 Absolute Window Trigger

To set window trigger via Relative window type:

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; then use the Universal Knob to select Window and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Window Type softkey to select Relative.

5. Press the Center Delta softkey to select Center or Delta trigger level mode; then turn
the Trigger Level Knob to adjust the position. The Center and Delta values are
displayed at the upper right corner of the screen.
In the trigger state message box, C means Center, the center value of the lower and
upper trigger levels; D means Delta, the difference between the lower (or upper)
trigger level and the trigger level center.

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Figure 32 Relative Window Trigger

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Interval Trigger

Trigger when the times difference between adjacent rising or falling edges meets
the time limit (<=, >=, [--,--], --][--).

Trigger Trigger

To set interval trigger:

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; then use the Universal Knob to select Interval and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Slope softkey to select rising or falling edge.

5. Press the Limit Range softkey; turn the Universal Knob to select desired condition.

● <= (less than a time value): trigger when the positive or negative pulse time of the

input signal is lower than the specified time value.

● >= (greater than a time value): trigger when the positive or negative pulse time of

the input signal is greater than the specified time value.

● [--,--] (within a range of time value): trigger when the positive or negative pulse

time of the input signal is greater than the specified lower limit of time and lower
than the specified upper limit of time.

● --][-- (outside a range of time value): trigger when the positive or negative pulse

time of the input signal is greater than the specified upper limit of time or lower
than the specified lower limit of time value.

6. Press the Time Setting softkey (<=, >=, [--,--],--][--), turn the Universal Knob to
select the desired value.

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Figure 33 Interval Trigger

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DropOut Trigger

DropOut trigger includes two types: edge and state.

Edge

Trigger when the time interval (△T) from when the rising edge (or falling edge) of the input
signal passes through the trigger level to when the adjacent rising edge (or falling edge)
passes through the trigger level is greater than the timeout time set, as shown in the figure
below.

Trigger Trigger

State

Trigger when the time interval (△T) from when the rising edge (or falling edge) of the input
signal passes through the trigger level to when the adjacent falling edge (or rising edge)
passes through the trigger level is greater than the timeout time set, as shown in the figure
below.

Trigger Trigger

To set edge DropOut trigger:

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; then use the Universal Knob to select DropOut and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source. The current trigger source is displayed at the upper right corner of the
screen. Select channel with signal input as trigger source to obtain stable trigger.

4. Press the Slope softkey to select rising or falling edge.

5. Press the OverTime Type softkey to select Edge.

6. Press the Time softkey; turn the universal to select the desired value.

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Figure 34 Edge DropOut Trigger

To set state DropOut trigger:

1. Press the Setup button to enter the TRIGGER system function menu.

2. Press the Type softkey; then turn the Universal Knob to select DropOut and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Slope softkey to select rising or falling edge.

5. Press the OverTime Type softkey to select State.

6. Press the Time softkey; turn the Universal Knob to select the desired value.

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Figure 35 State DropOut Trigger

Runt Trigger

The Runt trigger looks for pulses that cross one threshold but not another as shown in the
picture below.

Positive runt pulse

High level

Low level

Negative runt pulse

● A positive runt pulse crosses through a lower threshold but not an upper threshold.

● A negative runt pulse crosses through an upper threshold but not a lower threshold.

To trigger on runt pulse:

1. Press the Setup button on the front panel to enter the TRIGGER system function
menu.

2. Press the Type softkey; then turn the Universal Knob to select DropOut and push
down the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1 or CH2 as the
trigger source.

4. Press the Polarity softkey to select Positive or Negative pulse to trigger.

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5. Press the Limit Range softkey; turn the Universal Knob to select the desired
condition (<=, >=, [--,--] or --][--).

6. Press the Time Setting softkey, and then turn the Universal Knob to select the
desired value.

7. Press the Next Page softkey to enter the second page of the TRIGGER system
function menu. Press the Lower Upper softkey to select Lower or Upper trigger level,
and the turn the Universal Knob to set the position.

Figure 36 Runt Trigger

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Pattern Trigger

The Pattern trigger identifies a trigger condition by looking for a specified pattern. The
pattern trigger can be expanded to incorporate delays similar to other triggers. Pattern
durations are evaluated using a timer. The timer starts on the last edge that makes the
pattern “true”. Potential triggers occur on the first edge that makes the pattern false,
provided that the time qualifier criterion has been met. The oscilloscope provides 4
patterns: logical AND, OR, NAND and NOR combination of the channels. Each channel
can be set to low, high or invalid.

Channel 1High

Channel 2 Low

AND Waveform

Trigger position 1 Trigger position 2

Do the following steps to set pattern trigger:

1. Press the Setup button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey; turn the Universal Knob to select Pattern, and then push
down the knob to confirm.

3. Press each channel softkey to select Invalid, High or Low.

● Low sets the pattern to low on the selected channel. A low is a voltage level that

is less than the channel's trigger level or threshold level.

● High sets the pattern to high on the selected channel. A high is a voltage level

that is greater than the channel's trigger level or threshold level.

● Invalid sets the pattern to don't care on the selected channel. Any channel set to

don't care is ignored and is not used as part of the pattern.
However, if all channels in the pattern are set to Invalid, the oscilloscope will not
trigger.
Adjust the trigger level for the selected analog channel by turning the Trigger
Level knob. Invalid doesn’t need to set a trigger level.

4. Press the Next Page softkey to enter the second page of the pattern trigger menu.

5. Press the Logic softkey and then turn the Universal Knob to select the desired logic
combination AND, OR, NAND or NOR.

6. Press the Time softkey; then turn the Universal Knob to select the desired time
value.

7. Press the Holdoff Close softkey to turn on the Holdoff function; then turn the

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Universal Knob to select the desired value.

Figure 37 Pattern Trigger

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Serial trigger and decode

The oscilloscope provides I2C, SPI, UART/RS232, CAN and LIN serial trigger and

decode. This chapter introduces the method of triggering and decoding these serial

signals in detail.

The contents of this chapter:

◆ I2C Trigger and Decoder

◆ SPI Trigger and Decoder

◆ UART/RS232 Trigger and Decoder

◆ CAN Trigger and Decoder

◆ LIN Trigger and Decoder

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I2C Trigger and Serial Decode

Three simple steps are necessary to trigger and decode the signals: “Setup for I2C
Signals”, “I2C Triggering” and “I2C Decode”.

Setup for I2C Signals

Setting the I2C (Inter-IC bus) signal includes two steps: connecting the serial data
signal (SDA) and serial clock signal (SCK) to the oscilloscope, specifying the threshold
voltage of each input signal.

1. Press Decode key to enter the DECODE function menu as Figure 38 shows.

Figure 38 I2C DECODE Menu

2. Press the Decode softkey and select the desired decoder (Decode1 or Decode2).

3. Press Protocol softkey and then select I2C by turning Universal Knob.

4. Press Signal softkey to enter the SIGNAL menu as Figure 39 shows.

Figure 39 I2C SIGNAL Menu

5. Set SCL (I2C’s clock signal):

a. Press SCL softkey to select the channel that is connected to the I2C clock signal.

b. Press Threshold softkey to set the I2C clock signal’s threshold voltage level

Using the Universal Knob. The threshold voltage level is required for decoding,
and it will be used as the trigger voltage level when setting the trigger type to
serial.

6. Set SDA (I2C’s data signal):

a. Press SDA to select the channel that is connected to the I2C data signal.

b. Press second Threshold softkey to set the I2C data signal’s threshold voltage

level using the Universal Knob. The threshold voltage level is for decoding,

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