Teledyne LeCroy T3DSO2204 User manual

User Manual

T3DSO2000 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 LeCroy products are protected by patent law.
Teledyne LeCroy 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 LeCroy.

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

standards and other international standards.

Contact Us

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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 Cord

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

Ground the Instrument

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

Connect the Signal Wire Correctly

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

Look Over All Terminals‟ Ratings

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

Use Proper Over-voltage Protection

Make sure that no over-voltage (such as that caused by a thunderstorm) can reach the
Product, to avoid exposure to the danger of electrical shock.

Electrostatic Prevention

Operate in an electrostatic discharge protective area environment to avoid damages
induced by static discharge. Always ground both the internal and external conductors of
the cable to release static before connecting.

Maintain Proper Ventilation

Inadequate ventilation may cause an increase of instrument‘s temperature, which may
eventually damage the instrument. Maintain proper ventilation and inspect the intake and
fan regularly.

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Avoid Exposed Circuits and Components

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

Use the 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 has occurred to the instrument, have it inspected by qualified
service personnel before further operation. 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 to the interior of the device or electric shock, please do
not operate in a humid environment.

Do Not Operate in an Explosive Atmosphere.

In order to avoid damage to the device or personal injury, 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 air, please keep the surface of device
clean and dry.

Handling Safety

Please handle with care during transportation to avoid damage to buttons, knobs, screen,
connectors and other parts.

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III

Safety Terms and Symbols

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

This electronic product is subject to disposal and recycling regulations
that vary by country and region. Many countries prohibit the disposal
of waste electronic equipment in standard waste receptacles. For more
information about proper disposal and recycling of your Teledyne
LeCroy product,

Terms and Symbols

The following symbols appear on the product or in its documentation:

WARNING

WARNING or CAUTION Condition or practice could result in injury or
loss of life, or damage to equipment.

PROTECTIVE (EARTH) TERMINAL

Rated for indoor use only. Do not operate where conductive pollutants
may be present.

High Voltage. Risk of electric shock or burn.

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Measurement Category

Measurement Categories

T3DSO2000 series digital oscilloscope’s measurement terminals are not rated for
measurements within measurement categories II, III, or IV

WARNING

Measuring terminals on this product are not intended to be connected directly
to mains.

Measurement Category Definitions

Measurement category II is for measurements performed on circuits directly connected to
low voltage installations. 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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V

Working Environment

Temperature

Operating: 10℃ to +40℃
Non-operation:-20℃ to +60℃

Humidity

Operating: 85% RH, 40℃, 24 hours
Non-operating: 85% RH, 65℃, 24 hours

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

Installation (Over Voltage) Category

This product is powered by mains conforming to installation (over-voltage) category II.

WARNING

Make sure that no over-voltage (such as that caused by lightning) can reach
the product or else the operator might be exposed to danger of electric shock.

Installation (Over-voltage) Category Definitions

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 fan-forced air cooling. Please make sure that the air intake and
exhaust areas are free from obstructions and have adequate ventilation. 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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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 probes, please do not leave them in fog,
liquid, or solvents.

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 scratching 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 injury.

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Document Overview

This manual introduces how to use the T3DSO2000 series digital oscilloscope in detail.

Quick Start

To Set the Vertical System

To Set the Horizontal System

To Set the Sample System

To Trigger the Oscilloscope

Serial Trigger and Decode

Digital Channels

To Save Reference Waveform

To Use the Math Operation

To Make Cursor Measurements

To Make Measurements

To Use the History Function

Display Setting
Save and Recall

System Function Setting

Provides information about preparations before
using the instrument and a brief introduction of
the key instrument features
Introduces the functions of the vertical system of
the oscilloscope
Introduces the functions of the horizontal
system of the oscilloscope
Introduces the functions of the sample system
of the oscilloscope
Introduces the trigger modes, trigger coupling,
trigger holdoff, external trigger and various
trigger types of the oscilloscope
Introduces how to trigger and decode an input
signal
Introduces how to set up and use the digital
channels
Introduces how to save and display reference
waveforms
Introduces the math operation functions of the
oscilloscope
Introduces how to use cursors to make
measurements
Introduces how to use measure functions to
measure the waveform parameters
Introduces the History function and how to use it
Introduces how to set the display of the
oscilloscope
Introduces how to save and recall the
measurement result and the setting of the
oscilloscope
Introduces how to configure the system setup

Arbitrary Waveform Generation

Default Setup

Troubleshooting

Content Conventions in this Manual

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Introduces how to use the arbitrary waveform
generation function
Introduces the Default setup of the oscilloscope

Introduces how to deal with common problems

IX

This manual uses the T3DSO2304 in examples and the descriptions shown list all the
functions and performances of other models. T3DSO2000 series includes the
following models:

Model Analogy Bandwidth channels

T3DSO2304 300 MHz 4
T3DSO2204 200 MHz 4
T3DSO2104 100 MHz 4
T3DSO2302 300 MHz 2
T3DSO2202 200 MHz 2
T3DSO2102 100 MHz 2

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Table of Contents

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..........................................................................................4

To Adjust the Supporting Legs ..........................................................................................4

To Connect to Power Supply.............................................................................................5

Power-on Inspection.........................................................................................................6

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

Functional Inspection........................................................................................................8

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

The Front Panel.......................................................................................................................10

The Rear Panel ........................................................................................................................11

Front Panel Function Overview................................................................................................12

Horizontal........................................................................................................................12

Vertical ............................................................................................................................13

Trigger .............................................................................................................................15

Run Control .....................................................................................................................16

Universal Knob ................................................................................................................17

Menu ...............................................................................................................................18

Help ..................................................................................................................................19

User Interface..........................................................................................................................20

To Use the Security Lock ..........................................................................................................22

To Set the Vertical System .........................................................................................................23

To Enable the Channel ............................................................................................................24

To Adjust the Vertical Scale ....................................................................................................25

To Adjust the Vertical Position................................................................................................25

To Specify Channel Coupling...................................................................................................26

To Specify Bandwidth Limit.....................................................................................................26

To Specify Probe Attenuation Factor......................................................................................27

To Specify channel Input Impedance......................................................................................27

To Specify Amplitude Unit ......................................................................................................28

To Invert a Waveform .............................................................................................................28

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XI

Set the Horizontal System ..........................................................................................................29

Adjust the Horizontal Scale.....................................................................................................30

Adjust Trigger Delay................................................................................................................31

Set the Roll mode....................................................................................................................32

Use the Zoom Function ...........................................................................................................33

To Set the Sample System .........................................................................................................34

Run Control .............................................................................................................................35

Overview of Sampling ..............................................................................................................36

Sampling Theory..............................................................................................................36

Sample Rate ....................................................................................................................37

Oscilloscope Bandwidth and Sample Rate......................................................................38

To Specify Memory Depth ......................................................................................................39

To Select Sampling Mode........................................................................................................39

To Select Waveform Interpolation Method ............................................................................40

To Select Acquisition Mode .....................................................................................................42

Normal ............................................................................................................................42

Peak Detect .....................................................................................................................43

Average ...........................................................................................................................44

Eres (Enhanced Resolution) .............................................................................................45

To Change the Horizontal Format...........................................................................................46

Use Sequence Mode ................................................................................................................47

To Trigger the Oscilloscope ........................................................................................................49

Trigger Source .........................................................................................................................51

Trigger Mode...........................................................................................................................52

Trigger Level ............................................................................................................................53

Trigger Coupling ......................................................................................................................54

Trigger Holdoff ........................................................................................................................55

Noise Rejection .......................................................................................................................56

Trigger Type .............................................................................................................................58

Edge Trigger ....................................................................................................................59

Slope Trigger ...................................................................................................................60

Pulse Trigger....................................................................................................................62

Video Trigger...................................................................................................................64

Window Trigger...............................................................................................................67

Interval Trigger................................................................................................................70

DropOut Trigger..............................................................................................................72

Runt Trigger.....................................................................................................................74

Pattern Trigger .................................................................................................................76

Serial trigger and decode...........................................................................................................78

IIC Trigger and Serial Decode ...................................................................................................79

Setup for IIC Signals.........................................................................................................79

IIC Triggering.....................................................................................................................81

IIC Serial Decode .............................................................................................................85

SPI Triggering and Serial Decode.............................................................................................87

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Setup for SPI Signals........................................................................................................87

SPI Triggering...................................................................................................................90

SPI Serial Decode..............................................................................................................92

UART/RS232 Trigger and Serial Decode ..................................................................................94

Setup for UART/RS232 Signals.........................................................................................94

UART/RS232 Triggering....................................................................................................96

UART/RS232 Serial Decode ..............................................................................................98

CAN Trigger and Serial Decode..............................................................................................100

Setup for CAN Signals....................................................................................................100

CAN Triggering...............................................................................................................102

CAN Serial Decode.........................................................................................................104

LIN Triggering and Serial Decode ..........................................................................................106

Setup for LIN Signals......................................................................................................106

LIN Triggering ................................................................................................................107

LIN Serial Decode ..........................................................................................................109

Digital Channels .........................................................................................................................111

To Connect the Digital Probes to the Device-under-test......................................................112

Acquiring Waveform Using the Digital Channels ..................................................................113

To Change the Display Type of the Digital Channels.............................................................113

To Switch a Single Channel On or Off....................................................................................115

To Switch All Digital Channels On or Off...............................................................................115

To Change the Logic Threshold for Digital Channels.............................................................115

To Reposition a Digital Channel ............................................................................................116

To Display Digital Channels as a Bus ......................................................................................116

To Save Reference Waveform........................................................................................................118

To Save REF Waveform to Internal Memory .........................................................................119

To Display REF Waveform......................................................................................................119

To Adjust REF Waveform Display...........................................................................................120

To Clear REF Waveform Display..............................................................................................120

To Use the Math Operation.......................................................................................................121

Units for Math Waveforms ...................................................................................................122

Math Operators ....................................................................................................................123

Addition or Subtraction.................................................................................................123

Multiplication and Division ...........................................................................................124

FFT Operation................................................................................................................125

Differentiate ..................................................................................................................129

Integrate........................................................................................................................130

Square Root....................................................................................................................131

To Adjust the Math Waveform Scale and Offset ..................................................................132

To Adjust the Math Waveform Horizontal Scale and Offset.........................................132

To Adjust the Math Waveform Vertical Scale and Offset...............................................132

To Make Cursor Measurements...............................................................................................133

X Cursors ...............................................................................................................................133

Y Cursors ................................................................................................................................133

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To Make Cursor Measurements............................................................................................134

To Make Measurements................................................................................................................135

Type of Measurement ...........................................................................................................136

Voltage Measurements .................................................................................................136

Time Measurements .....................................................................................................138

Delay Measurements ....................................................................................................139

To Make Automatic Measurements ......................................................................................140

To Clear Measurement Parameters.......................................................................................142

To Make All Measurement ....................................................................................................142

Display Setting...............................................................................................................................143

To Set Display Type................................................................................................................144

To Set Color Display...............................................................................................................145

To Set and Clear Persistence .................................................................................................145

To Clear the Display...............................................................................................................146

To Select Grid Type ...............................................................................................................147

To Adjust Waveform Intensity...............................................................................................147

To Adjust Grid Brightness......................................................................................................149

To Adjust Transparence .......................................................................................................149

Save and Recall...............................................................................................................................150

Save Type...............................................................................................................................151

Internal Save and Recall ........................................................................................................152

External save and recall.........................................................................................................153

Disk Management .................................................................................................................156

To Create a New File or Folder ......................................................................................157

To delete a file or folder ................................................................................................158

To rename a file or a folder ...........................................................................................158

System Function Setting................................................................................................................159

To View the System Status....................................................................................................160

To Do Self-Calibration............................................................................................................161

To Enable or Disable the Sound ............................................................................................162

To Specify the Language .......................................................................................................162

To Enable Pass/Fail Test.........................................................................................................163

To Set and Perform Pass/Fail Test ................................................................................164

To Save and Recall Test Mask ........................................................................................165

I/O Set ...................................................................................................................................167

To Set the USB Device ...................................................................................................167

To Set the LAN...............................................................................................................168

To Set Aux Output .........................................................................................................169

To Enable Quick-Cal...............................................................................................................170

To Update Firmware and Configuration ...............................................................................171

To Perform a Self-Test............................................................................................................172

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Screen Test....................................................................................................................172

Keyboard Test ...............................................................................................................173

LED Test.........................................................................................................................174

To Specify the Screen Saver Time..........................................................................................175

Option Management.............................................................................................................176

To Use the History Function..........................................................................................................178

Arbitrary Waveform Generator ....................................................................................................180

To Set Wave Type and Parameters........................................................................................181

To Output Arbitrary Waveform.............................................................................................183

To Set Output Load................................................................................................................184

Recover the Default Setup of AWG. ......................................................................................184

To Do AWG Self-Cal ...............................................................................................................185

Default Setup ................................................................................................................................186

Troubleshooting ............................................................................................................................192

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XV

Content of Figure

Figure 1: Front View ..................................................................................................................3

Figure 2: Top View.....................................................................................................................3

Figure 3: Adjust the Supporting Legs ........................................................................................4

Figure 4: To Connect to Power Supply ......................................................................................5

Figure 5: Function Inspection....................................................................................................8

Figure 6: Front Panel Overview...............................................................................................10

Figure 7: Rear panel Overview................................................................................................11

Figure 8: Help Message ...........................................................................................................19

Figure 9: User Interface...........................................................................................................20

Figure 10: To Use the Security Lock.........................................................................................22

Figure 11: Display Type Set to Dots.........................................................................................40

Figure 12: x Interpolation........................................................................................................41

Figure 13: Sinx/x Interpolation................................................................................................41

Figure 14: Acquisition System .................................................................................................42

Figure 15: Pulse With 0.1% Duty, Normal Mode.....................................................................43

Figure 16: Pulse With 0.1% Duty, Peak Detect Mode..............................................................43

Figure 17: With Random Noise, Normal Mode.......................................................................44

Figure 18: With Random Noise, Average Mode......................................................................45

Figure 19: Eres Mode ..............................................................................................................45

Figure 20: SEQUENCE Function Menu.....................................................................................47

Figure 21: HISTORY Function Menu ........................................................................................47

Figure 22: Turn off Noise Reject ........................................................................................56

Figure 23: Turn on Noise Reject........................................................................................56

Figure 24: Edge Trigger............................................................................................................59

Figure 25: Slope Trigger...........................................................................................................60

Figure 26: Pulse Trigger......................................................................................................63

Figure 27: Video Trigger ..........................................................................................................66

Figure 28: Absolute Window Trigger.......................................................................................68

Figure 29: Relative Window Trigger ........................................................................................69

Figure 30: Interval Trigger .......................................................................................................71

Figure 31: Edge DropOut Trigger.............................................................................................73

Figure 32: State DropOut Trigger ............................................................................................73

Figure 33: Runt Trigger............................................................................................................75

Figure 34: Pattern Trigger........................................................................................................77

Figure 35: IIC SINGAL Menu ....................................................................................................79

Figure 36: IIC SIGNAL Menu ....................................................................................................79

Figure 37: IIC TRIGGER Menu ..................................................................................................84

Figure 38: IIC Decode Menu ....................................................................................................85

Figure 39: IIC Decode Result ...................................................................................................85

Figure 40: SINGAL Menu .........................................................................................................87

Figure 41: CLK Menu ...............................................................................................................87

Figure 42: MISO Menu ............................................................................................................88

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Figure 43: MOSI Menu ............................................................................................................88

Figure 44: SPI TRIG SET Menu .................................................................................................90

Figure 45: SPI Trigger...............................................................................................................91

Figure 46: SPI Decode..............................................................................................................92

Figure 47: UART SIGNAL Menu ...............................................................................................94

Figure 48: BUS CONFIG Menu .................................................................................................95

Figure 49: UART TRIG SET Menu .............................................................................................96

Figure 50: UART Trigger...........................................................................................................97

Figure 51: CAN Decode ...........................................................................................................98

Figure 52: CAN SIGNAL Menu ...............................................................................................100

Figure 53: CAN Trigger...........................................................................................................103

Figure 54: CAN Decode .........................................................................................................104

Figure 55: LIN SIGNAL Menu .................................................................................................106

Figure 56: LIN Trigger ............................................................................................................108

Figure 57: LIN Decode ...........................................................................................................109

Figure 58: Digital Function Menu ..........................................................................................113

Figure 59: Low Display Type..................................................................................................113

Figure 60: Middle Display Type .............................................................................................114

Figure 61: High Display Type .................................................................................................114

Figure 62: THRESHOLDS Function Menu...............................................................................115

Figure 63: DIGITALBUS Function Menu .................................................................................116

Figure 64: Digital Bus.............................................................................................................117

Figure 65: Reference Waveform............................................................................................120

Figure 66: Reference Waveform............................................................................................123

Figure 67: Reference Waveform............................................................................................124

Figure 68 FFT Waveform in Exclusive Mode..........................................................................127

Figure 69: Differential Function Operation ...........................................................................129

Figure 70: Integral without Offset.........................................................................................130

Figure 71: Integral with Offset ..............................................................................................131

Figure 72: Square Root..........................................................................................................131

Figure 73: Measure Pulse Width...........................................................................................134

Figure 74: Voltage Measurements ........................................................................................136

Figure 75: Overshoot.............................................................................................................137

Figure 76: Preshoot...............................................................................................................137

Figure 77: Time Measurements ............................................................................................138

Figure 78: Select the Measurement Parameter....................................................................140

Figure 79: Add the Measurement .........................................................................................141

Figure 80: All Parameters Measurement...............................................................................142

Figure 81: Vectors Display.....................................................................................................144

Figure 82: Dots Display..........................................................................................................144

Figure 83: Color Temperature ...............................................................................................145

Figure 84: Persist Set to Infinite ............................................................................................146

Figure 85: Intensity Set to 100% ...........................................................................................148

Figure 86: Intensity Set to 10% .............................................................................................148

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XVII

Figure 87: SAVE/RECALL File System.....................................................................................153

Figure 88: Select Save Location.............................................................................................154

Figure 89: File Name Dialogue ..............................................................................................154

Figure 90: Input Keyboard.....................................................................................................157

Figure 91: System Status .......................................................................................................160

Figure 92: Do Self Cal ............................................................................................................161

Figure 93: Pass/Fail Test ........................................................................................................163

Figure 94: LAN Setting Interface............................................................................................168

Figure 95: Screen Test .........................................................................................................172

Figure 96: Keyboard Test.....................................................................................................173

Figure 97: LED Test ..............................................................................................................174

Figure 98: Screen Saver Interface .......................................................................................175

Figure 99: OPTION Function Menu .....................................................................................176

Figure 100: LABEL Function Menu ........................................................................................176

Figure 101: Option Information ............................................................................................177

Figure 102: History ................................................................................................................178

Figure 103: Send Wave Dialogue...........................................................................................183

Figure 104: AWG Menu.........................................................................................................183

Figure 105: SETTING Function Menu ....................................................................................184

Figure 106: AWG Self Cal.......................................................................................................185

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Quick Start

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

The contents of this chapter:

u General Inspection

u Appearance and Dimensions

u To Prepare the Oscilloscope for Use

u The Front Panel

u The Rear Panel

u Front Panel Function Overview

u User Interface

u To Use the Security Lock

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1

General Inspection

1. Inspect the shipping container for damage.

Keep the damaged shipping container or cushioning material until the contents of the
shipment have been completely checked and the instrument is passed both electrical
and mechanical tests.
The consigner or carrier will be responsible for damages to the instrument resulting
from shipment. Teledyne Test Tools does not provide free maintenance or
replacement if the instrument has been damaged in shipment.

2. Inspect the instrument.

If there is mechanical damage or defect, or failure in the electrical and mechanical
tests, please contact your Teledyne Test Tools distributor.

3. Check the accessories

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

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Appearance and Dimensions

352mm

Figure 1: Front View

224mm

Figure 2: Top View

128mm

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3

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 3: Adjust the Supporting Legs

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To Connect to the Power Supply

The oscilloscope will accept a 100~240V, 50/60Hz or 100~120V, 400Hz power supply.
Please use the power cord provided with the accessories to connect the instrument to the
power source as shown in the figure below.

Power
socket

Figure 4: Connect to the Power Supply

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5

Power-on Inspection

When the oscilloscope is energized, 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 sounds of relays switching. After the
self-test is finished, the welcome screen is displayed.

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To Connect the Probe

Teledyne Test Tools provides passive probes for the T3DSO2000 series oscilloscopes.
For detailed technical information of the probes, please refer to the corresponding Probe
User‘s Guide.

Connect the Probe:

1. Connect the BNC terminal of the probe to one of the channel BNC connectors on the
front panel.

2. Connect the probe tip to the circuit point under test and the ground alligator clip of the
probe to the ground terminal of the circuit.

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7

Functional Inspection

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

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

4. Press the Auto Setup softkey.

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

Figure 5: 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”
in the next section.

WARNING

To avoid electric shock during the use of probe, please make certain that the

insulated wire of the probe is in good condition and does not touch the
metallic part of the probe when the probe is connected to high voltage source

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Probe Compensation

All oscilloscope probes should be properly compensated before their first use with the
oscilloscope. Non-compensated or inadequate compensated probe 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 flat-head screwdriver to adjust the low-frequency compensation
adjustment hole on the probe until the waveform matches the “Perfectly Compensated”
waveform above.

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The Front Panel

2

1

3

5

4

14

17

8
9

10
11

16

23

20

22

21

19

6

7

13

15

18

Figure 6: Front Panel Overview

NO. Description NO. Description

1 Horizontal Control 13 Function Menus
2 Auto Setup 14 WaveGen Control
3 Run/Stop 15 Vertical Control for Analog Channels
4 Default Setup 16 WaveGen Output

5 Clear Sweeps 17

Probe Compensation/ Ground

Terminal
6 Universal Knob 18 USB Host
7 Trigger Control 19 Digital Inputs
8 Decode Control 20 Analog Inputs
9 Digital Channel Control 21 One- Button shortcut for Save
10 Math Function 22 Function Menu Softkeys
11 Reference Function 23 Power On/Off
12 Vertical Control for Math and Ref

12

10

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The Rear Panel

Figure 7: 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 a user-network via this interface to perform
remote control.

3. USB Device

The T3DSO2000-series support SCPI remote control commands. User can control the
oscilloscope through this interface.

4. Pass/Fail or Trigger Out

This connector outputs either a Pass/Fail pulse when using this mode of operation or it
can be used to output a pulse that corresponds to each oscilloscope trigger operation.

5. External Trigger terminal

6. Safety lock Hole

This hole is designed to accommodate a Kensington style of lock (user-supplied).

7. AC Power Socket

AC power input terminal. The power requirements of this oscilloscope are 100-240 V,
50/60 Hz or 100-120 V, 400 Hz. Use the power cord provided with the instrument to
connect it to AC power.

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Front Panel Function Overview

Horizontal

Quickly enter the roll mode. The timebase range is from 1ns/div to 50s/div.

Press the button to open the Zoom function and press again to close the
function.

Horizontal Position Knob: Sets the horizontal location of the trigger event on the
display. The waveform will move left or right when you turn the knob. Meanwhile, the Delay
value will increase or decrease as the waveform moves. Press the knob to reset the trigger
delay to Zero.

Horizontal Scale Knob: Sets the timebase (horizontal sweep speed). Turn it
clockwise or counterclockwise to reduce or increase the timebase. The displayed waveform
will be expanded or compressed when the timebase changes. Press the knob to enter into
the Zoom mode.

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Vertical

Analog input channels. The four channels are marked by different colors which
are also used to mark both the waveforms on the screen and the channel input
connectors. Press channel button to open the corresponding channel and press

again to turn it off.

Vertical Position Knob: Set the vertical offset of the current waveform. Turn
clockwise to increase the position and turn counterclockwise to decrease. When

changing the offset, the waveform will move up and down and the offset message
at the lower part of the screen will change accordingly. Press the knob to quickly reset the
offset to zero.

Vertical Scale Knob: Sets the vertical scale of the current waveform. Turn
clockwise to decrease the scale value and while turn counterclockwise to increase

it. During the modification, the ‘amplitude‘ of the waveform will enlarge or reduce
and the scale message at the right side of the screen will also change. Press the knob to
quickly switch the vertical scale adjustment modes between “Coarse” and “Fine”.

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Press the button to open the decode menu. Decode is an optional function.
T3DSO2000 supports two serial buses shown as 1 and 2 for analog signal
decoding. The protocols include I2C, SPI, UART/RS232, CAN and LIN.

Press the button to open the digital channel function menu (Optional function).
The T3DSO2000 support 16 digital channels and requires the optional leadset.

Press the button to open the Math operation menu in order to select functions
including add, subtract, multiply, divide, FFT, integral, differential, and square
root.

Press the button to enable the stored Reference waveform function. The
reference waveform can be used in comparisons to the current waveform.
T3DSO2000 supports saving up to 4 reference waveforms.

Ref/Math Vertical Position Knob: Sets the vertical offset of Math or Ref waveform.
Turn clockwise to increase the offset or turn counterclockwise to decrease the offset. During
the modification, the waveform will move up and down and the offset message at the lower
part of the screen will change accordingly. Press the knob to quickly reset the offset to zero.

Ref/Math Vertical Scale Knob Sets the vertical scale of Math or Ref
waveform. Turn clockwise to decrease the scale or turn counterclockwise to
increase it. During the modification, the ‘amplitude‘ of the waveform will increase or decrease
and the scale value displayed on the right side of the screen will change accordingly. In
addition, the knob can be used to change a digital channel.

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Trigger

Press the button to open the trigger menu. The oscilloscope provides various
trigger types: Edge, Slope, Pulse, Video, Window, Interval, Dropout, Runt,
Pattern and Serial Bus (I2C/SPI/UART/RS232/CAN/LIN).

Press the button to set to Auto trigger mode.

Press the button to set to Normal trigger mode.

Press the button to set to Single trigger mode.

Trigger Level Knob: Sets the trigger level. Turn it clockwise or counterclockwise to
make the level move up or down. In addition, the trigger level value is displayed in the upper
right portion of the display. Press the knob to quickly reset the trigger level to 50% of
waveform.

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Run Control

Press the button to enable the waveform auto setup function. The oscilloscope
will automatically adjust the horizontal time base, vertical scale and trigger
mode according to the input signal to provide a triggered stable display.

Press the button to set the state of the instrument to “RUN” or “STOP”. In the
“RUN” state, the button glows yellow; In “STOP” state, the button glows red.

Press the button to reset the oscilloscope to its default setup. The default

voltage scale and timebase scale are respectively 1V/div and 1μs/div.

This button is a shortcut key for clear function. When measurement statistics
are being displayed, press this button to clear the count and begin a new
statistical count. When the screen persistence feature is turned on, press this
button to clear the persistence.

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Universal Knob

1. Adjust the waveform intensity

When the menus are hidden, you can use the waveform intensity knob to adjust
waveform intensity (0% ~ 100%). Turn clockwise to increase the brightness and
counterclockwise to reduce. You can also press Display/Persist→Intensity and use
the knob to adjust the intensity. To adjust grid brightness (0% ~ 100%) or transparency
(20% ~ 80%), please operate in the same way as waveform intensity.

2. Universal Knob

In menu operation, the light below the knob is illuminated. In such cases, the knob can
be used to select between sub-menus under the current menu. Press the knob to select
the current submenu. In addition, it can be used to modify parameters and to input a
file name.

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Menu

Press the button to open the cursor function. It provides manual and tracking
cursor modes.

Press the button to enter the sampling menu. From here the acquisition mode
can be set (Normal/Peak-Detect/Average/Eres), interpolation mode (Sinx/x or
linear) and memory depth. The XY mode can be selected here as well as the
Sequence function.

Press the button to enter the file save and recall function menu. The storable
file types include Setups, Waveforms, Picture and References.

Press the button to open the WaveGen menu. The T3DSO2000 provides a
built-in function generator (optional). 11 types of Waveforms including Sine,
Square, Ramp, Pulse, DC, Noise, Cardiac, Gauss Pulse, ExpRise, ExpFall
and Arb are supported.

.

Press the button to enter the measurement setting menu. The user can set
measurement type(s), statistics and gating. Up to five parameters can be
selected.

Press the button to enter the display menu and quickly enable the persist
function. User can set the grid, Intensity, brightness, transparency.

Press the button to enter the utility menu to set system functions or parameters,
such as I/O set, sound, and screen language. In addition, some advanced
functions (such as Pass/Fail, Self Cal, install option function and Update) are
also supported.

Press this button to enter the history mode. History mode can record up to
80,000 frames. If the Sequence function is enabled, only the selected frames
are recorded (up to 80,000).

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Help

The T3DSO2000 has an on line help function that supplies multi-language help information,
that you can recall to help you operate the oscilloscope when you need.

Press any button for 2 seconds to enter the online help. All sub-menus of every main menu
have help information.

Figure 8: Help Message

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User Interface

Figure 9: User Interface

1. Settings Information Area

Channel settings information items (numbers 3, 4, 5 and 7).

2. Channel Label/Waveform

Different channels are marked by different colors and the color of the waveform
matches 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 of each grid on the horizontal axis of the screen. Turning the
HORIZONTAL SCALE Knob changes the horizontal sweep speed within the range of
1ns/div to 50s/div.

5. Horizontal Trigger Position (Delay), see item 6.

Use the Horizontal POSITION Knob to modify the parameter. Turn clockwise or
counterclockwise to make the waveform move right or left, which will respectively cause
the Delay parameter to decrease or increase. Press the knob to automatically reset the
parameter to zero as well as return the waveform‘s horizontal center to the middle of
the screen.

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6. Trigger Position Label

Display the trigger position of the waveform on the screen.

7. Frequency Counter

Display the frequency of current waveform as trigger source.

8. Sampling Rate/ Memory Depth

Display the current sample rate and memory depth of the oscilloscope. Use the
Horizontal scale knob to modify the parameters.

9. Trigger Setup

Trigger Type : Displays the currently selected trigger type and trigger condition
setting. Different labels are displayed when different trigger types are selected. Trigger
source : Displays the trigger source currently selected. Different labels are
displayed when different trigger source are selected and the color of the trigger
parameter area will change accordingly.
Trigger condition : Displays the current trigger condition.
Trigger coupling : Displays coupling mode (DC/AC/LF Reject/HF Reject) of the
current trigger source.
Trigger level : Displays the trigger level value of the current waveform.
Press the knob to reset the parameter to 50% of the waveform.

10. Channel Setup

Probe attenuation factor : Displays currently selected probe attenuation factor. All
factors are: 0.1X/0.2X/0.5X/1X/2X/5X/10X/20X/50X/100X/200X/500X/1000X/2000X
/5000X/10000X.

Input impedance : Displays currently selected impedance (1MΩ/50Ω) of the

channel.
Channel coupling : Displays the selected coupling mode of the current channel.
All modes are: DC/AC/GND.
Vertical Scale : Represents the voltage value of each grid on the vertical axis
of the screen.

11. Trigger Level Label

Displays position of the current channel trigger level. Press down the knob to reset the
level to vertical center of the waveform.

12. I/O status

Indicates that the USB Device (USBTMC) is connected.
Indicates that the USB Host is connected.
Indicates that the LAN port is connected. Indicates it is disconnected.

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13. Menu

Display menus of the currently selected function module. Press any menu softkey to
select or adjust the corresponding setting.

To Use the Security Lock

Provisions for a Kensington-style lock are provided on the rear panel of the T3DSO2000
(Lock is not included). To use, align the lock with the lock hole and insert, turn the key
clockwise to lock the instrument and then remove the key from the lock.

Figure 10: To Use the Security Lock

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To Adjust the Vertical System

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

The contents of this chapter:

u To Enable the Channel

u To Adjust the Vertical Scale

u To Adjust the Vertical Position

u To Specify Channel Coupling

u To Specify Bandwidth Limit

u To Specify Probe Attenuation Factor

u To Specify channel Input Impedance

u To Specify Amplitude Unit

u To Invert a Waveform

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To Enable the Channel

T3DSO2000 provides 2/4 analog input channels (CH1, CH2, CH3, CH4) and provides
independent vertical control system for each channel. As the vertical system setting
methods of both channels are the same, this chapter takes CH1 as an example to
introduce the configuration method of the vertical system.

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

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 twice.

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To Adjust the Vertical Scale

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

l Coarse adjustment (turning counterclockwise as an example): Set the vertical scale

in 1-2-5 step namely 1mv/div, 2 mV/div, 5 mV/div, 10 mV/div …10 V/div.

l Fine adjustment: Further adjust the vertical scale within a relatively smaller range to

improve vertical resolution. For example: 2 V/div, 1.98V/div, 1.96V/div, 1.94 V/div …1
V/div.

If the amplitude of the input waveform is slightly greater than the full scale under the
current scale and the amplitude would be to low if the next scale is used, fine adjustment
can be used to improve the amplitude of waveform display to view signal details or
perform vertical based measurements.

Press the CH1 button on the front panel; then press the Adjust softkey to select the
desired mode. Turn the VERTICAL Scale 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 1mv/div to 10 V/div.

Note: Push the VERTICAL Scale 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

1 mV/div ~ 100 mV/div ±1V
102 mV/div ~ 1 V/div ±10 V

1.02 V/div ~ 10 V/div ±100 V

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To Specify Channel Coupling

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

l When the coupling mode set to DC: The DC and AC components of the

signal-under-test can both pass into the T3DSO2000 channel.

l When the coupling mode set to AC: The DC components of the signal-under-test are

blocked.

l 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 noise. For example, the signal-under-test is a pulse
with high frequency oscillation.

l When the bandwidth limit set to full, the high frequency components of the

signal-under-test can pass into the T3DSO2000 channel.

l When the bandwidth limit is set to 20MHz, the high frequency components that

exceed 20 MHz are attenuated.

Press the CH1 button the front panel; then press the BW Limit softkey to select Full or
20MHz. 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.

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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 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 matching gives you the most accurate measurements
because reflections are minimized along the signal path.

l The 1MΩ Impedance setting 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.

l The 50Ω Impedance setting matches 50 ohm cables commonly used in making high

frequency measurements, and 50 ohm active probes.

Press the CH1 button on the front panel; then press the Impedance softkey to select the
desired impedance.

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

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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 CH1 button 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 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 and not the trigger settings.

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

1. Press CH1 button 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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Adjusting the Horizontal System

This chapter introduces how to adjust the horizontal system settings of the oscilloscope.

The contents of this chapter:

u Adjust the Horizontal Scale

u Adjust the Trigger Delay

u Set Roll Mode

u Use the Zoom Function

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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 50s/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 will move left or right and the
trigger delay message at the upper-right corner of the screen changes accordingly. Press
the knob to quickly reset the trigger delay.

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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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 operates
only 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 triggering is not supported. 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 or post-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
horizontal analysis of the 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 the 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 is ghosted. 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 that a
portion of the waveform before the trigger event is displayed, and positive values indicate
a portion of 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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To Set the Acquisition Sampling System

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

The contents of this chapter:

u Run Control

u Overview of Sampling

u To Specify Memory Depth

u To Select Sampling Mode

u To Select Waveform Interpolation Method

u To Select Acquisition Mode

u To Change the Horizontal Format

u Use Sequence Mode

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Run Control

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

l 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.

l When the Run/Stop button is red, data acquisition is stopped. This is indicated by a

"Stop" displayed in the status line at the top of the display. To start acquiring data,
press Run/Stop.

l 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 Single is pressed 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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Overview of Sampling

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

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

36

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Sample Rate

The maximum sample rate of the T3DSO2000 is 2GSa/s. The actual sample rate of
the oscilloscope is determined by the horizontal scale and acquisition depth. Turn
the Horizontal Scale Knob to adjust the sample rate.
The current 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 the jitter on
fast edges.

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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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 ¼ 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.

38

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To Specify Memory Depth

Memory depth refers to the number of waveform points that the oscilloscope can store in a
single trigger acquisition and it reflects the storage ability of the sample memory. The
T3DSO2000 provides up to 140 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 the knob to confirm. Pressing
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.

Since the oscilloscope has one acquisition memory per two channels, when only one
channel is on (per two channels), the maximal memory depth is up to 140Mpts.

The relation of memory depth, sample rate and waveform length fulfills the equation
below:

Memory depth = sample rate (Sa/s) × waveform length (s/div × div)

To Select Sampling Mode

The T3DSO2000 only supports real-time sampling. In this mode, the oscilloscope samples
and displays waveform within a trigger event. The maximum real-time sample rate of the
T3DSO2000 is 2GSa/s.

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

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To Select Waveform Interpolation Method

Under real-time sampling, the oscilloscope acquires the discrete sample values of the
waveform being displayed. In general, a waveform comprised of a singular dot per sample
point 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.

The interpolation method ‘connects all the sampled points’, to estimate the whole
appearance of the waveform. The oscilloscope can use interpolation to fill in the gaps
between points and accurately reconstruct a 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.

l x: The adjacent sample points are directly connected with a straight line. This method

is confined to rebuilding the edge of signals, such as a square wave.

l Sinx/x: Connecting the sampling points via mathematical calculation has more

versatility. Sinx/x interpolation method uses mathematical processing to calculate
results in the actual sample interval. This method involves mthematically calculating
the signal waveform, and allows it to produce a more realistic shape than pure square
wave and pulse. When the sampling rate is 3 to 5 times the bandwidth of the system,
the Sinx/x interpolation method is recommended.

Figure 11: Display Type Set to Dots

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Figure 12: x Interpolation

Figure 13: Sinx/x Interpolation

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To Select Acquisition Mode

The acquisition mode is used to control how to generate waveform points from sampled
points. The T3DSO2000 provides the following acquisition mode: Normal, Peak Detect,
Average and Eres.

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 the knob to confirm. The default setup is Normal.

Normal

In this mode, the oscilloscope samples the signal at an 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 14: 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 aliasing can be prevented but the noise
displayed would be larger. In this mode, the oscilloscope can display all the pulses with
pulse widths as small as 1ns.

Figure 15: Pulse With 0.1% Duty, Normal Mode

Figure 16: 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 (uncorrelated) 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 will be the response of the displayed
waveform to waveform changes.

The available range of averages is from 4 to 1024 with a default value of 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 17: With Random Noise, Normal Mode

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Figure 18: With Random Noise, Average Mode

Eres (Enhanced Resolution)

This mode uses a digital filter to reduce the random noise on the input signal and generate
much smoother waveforms on the screen.

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

Figure 19: Eres Mode

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To Change the Horizontal Format

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

YT

It is the normal / default viewing mode for the oscilloscope. It’s a signal (Y axis) amplitude
verses time (T, X axis) display.

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.

XY mode can be used to compare frequency and phase relationships between two signals.
It 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 the 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).

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Use Sequence Mode

The Sequence Mode does not display the waveform during the sampling process. This
improves the waveform capture rate by focusing the instrument resources on sampling.
This increases the waveform capture rate to about 500,000 wfm/s. The Sequence Mode
increases the ability to capture events with small probability effectively.

The oscilloscope keeps running and filling data memory in segments for each trigger
event, unit the memory is full, and then display all 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 20: 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 the HISTORY function.

Figure 21: 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 displaying on the screen.

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

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display.

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

5. Press the softkey to pause the replay.

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

frame.

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Oscilloscope Triggering

Trigger Event ↓

Pre-trigger Buffer

To observe and measure elements of an input waveform, it is most useful to have a stable
and reproducible image of that waveform. To accomplish this, many oscilloscopes feature
a trigger model that enables you to specify certain conditions for the input signal (only
trigger on the rising edge, for example). The input signal is evaluated according to these
settings and when a waveform meets this condition, the oscilloscope captures it and it is
displayed on the screen. Digital oscilloscopes can display the input waveform continuously
without a stable trigger present. Only a stable trigger can ensure a stable display of the
waveform. The trigger circuit ensures that every time base sweep or acquisition starts from
the input signal and the user-defined trigger condition, namely every sweep is synchronous
to the acquisition and the waveforms acquired overlap to display a stable waveform.

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.

Post-trigger Buffer

Acquisition Memory

The trigger setting should be based on the type of signal characteristics of the input signal,
thus a certain amount of knowledge about the signal-under-test is helpful in order to quickly
capture the desired waveform.

T3DSO2000 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 these trigger
function types listed above in detail and explain how to set the trigger conditions in order
to capture the desired waveform.

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The contents of this chapter:

u Trigger Source

u Trigger Mode

u Trigger Level

u Trigger Coupling

u Trigger Holdoff

u Noise Rejection

u Trigger Type

l Edge Trigger

l Slope Trigger

l Pulse Trigger

l Video Trigger

l Window Trigger

l Interval trigger

l Dropout Trigger

l Runt Trigger

l Pattern Trigger

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Trigger Source

T3DSO2000 trigger sources include analog channels (CH1, CH2, CH3, CH4), as well as
external trigger inputs EXT, EXT/5 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
channel with signal input as trigger source to obtain stable trigger.

Analog channel input:
Signals input from analog channels 1~4 can all be used as the trigger source.

External trigger input:

The external trigger source can be used to connect an external trigger signal to the EXT
TRIG channel when all of the four channels are sampling data. The trigger signal (such as
an external clock or a signal from 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 level. You can set the trigger level within the
range of the trigger level (between -8 div to +8 div).

AC line:

The trigger signal is obtained from the AC power input of the oscilloscope. This type of
trigger signal can be used to display the relationship between a signal of interest (such as
illuminating device) and power (power supply device). For example, it is often used in the
power industry to achieve a stable trigger when observing the waveform output from the
transformer of a transformer substation.

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

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Trigger Mode

T3DSO2000 trigger modes include Auto, Normal and Single. The trigger mode affects the
way in which the oscilloscope searches for the trigger.

After the oscilloscope begins to capture data, 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. This is also known as a First Input First Out, or FIFO buffer).

When/if a match for the given trigger condition 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 full acquisition memory.

Press the Auto, Normal or the Single buttons on the front panel to select the desired
trigger mode, and the corresponding status light will be lit.
Ø 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 waveforms on the display may not be stable or
repeatable in this case, but you should observe some portion of the waveforms.

The Auto trigger mode is appropriate when:

l Checking DC signals or signals with unknown levels or activity.
l When trigger conditions occur often enough that forced triggers are

unnecessary.

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

trigger conditions are found. Otherwise, the oscilloscope holds the original waveform
until the next trigger happens.

The Normal trigger mode is appropriate when:

l We only want to acquire specific events specified by the trigger settings.
l 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 and
overwriting the current waveform with undesired data.

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

waveform when the trigger condition is met and then stops acquiring data.

The Single trigger mode is appropriate in order:

l To capture single event or a periodic signal.
l 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

The trigger level can be adjusted for a selected analog channel by turning the Trigger
Level Knob.

Push the Trigger Level Knob to set the level to the middle of the waveform. If AC
coupling is used, pushing the Trigger Level knob sets the trigger level to approximately
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.

T3DSO2000 provides 4 trigger coupling modes:

l DC: Allows DC and AC components into the trigger path.
l AC: Blocks all the DC components and attenuates signals lower than 8 Hz. Use AC

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

l LF Reject: Blocks the DC components and reject the low frequency components below

900 kHz. This setting also 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.

l HF Reject: Rejects the high frequency components higher 500kHz

Note: Trigger coupling effects the trigger setting only. Channel

coupling is a separate control.

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Trigger Holdoff

Trigger holdoff can be used to stabilize the triggering of complex waveforms (such as a
pulse series). Holdoff 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 triggers have the holdoff option. The holdoff time of T3DSO2000 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: Adjusting 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 22: No Trigger Noise Rejection

Figure 23: Turn on Noise Reject

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If the signal you are probing is noisy, you can setup 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

T3DSO2000 provides multiple advanced trigger functions, including various serial
bus triggers.

u Edge trigger

u Slope trigger

u Pulse trigger

u Video trigger

u Window trigger

u Interval trigger

u DropOut trigger

u Runt trigger

u 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 CH1, CH2, CH3, CH4,

EXT, EXT/5 or AC Line as the 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 24: 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 the
specified time range.

In T3DSO2000, 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.

A

The upper limit of trigger level

B 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 CH1~4 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.

Figure 25: Slope Trigger

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

slope condition, and push down the knob to confirm.
l < (less than a time value): Trigger when the positive or negative slope time of the

input signal is lower than the specified time value.

l > (greater than a time value): Trigger when the positive or negative slope time of

the input signal is greater than the specified time value.

l [--,--](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 value.

l --][--(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 and lower
than the specified lower limit of time value.

6. Press the Next Page softkey and press of Lower Upper softkey to select Lower or

Upper the 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 larger than the upper trigger level. In the trigger
state message box, L1 indicates the upper trigger level while L2 indicates the lower
trigger level.

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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 CH1~4 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 that 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.

l < (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.

l > (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.

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l [--,--](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.

l --][--(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 26: Pulse Trigger

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Video Trigger

Video triggering can be used to capture the complicated 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 T3DSO2000 supports standard video signals for NTSC (National Television
Standards Committee), PAL (Phase Alternating Line) HDTV (High Definition Television)
and custom video signal triggers.

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 CH1~4 as the trigger

source. Turn 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. T3DSO2000

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 Interlaced Tri-level
HDTV 1080i/60 Interlaced Tri-level
Custom

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

Frame Rate 25 Hz, 30 Hz, 50 Hz, 60 Hz
Of Lines 300~2000
Of Fields 1, 2, 4, 8
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.

l Any: Trigger on any of the horizontal sync pulses
l 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:

l To trigger on a specific line of video
l 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 27: Video Trigger

To Use Custom Video Trigger

Custom video trigger supports frame rates 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.

l Press the Type softkey to select or Any.
l 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

The windows 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

l 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.

l 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.

l 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 CH1~4 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 upper 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 28: 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 CH1~4 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 29: Relative Window Trigger

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Interval Trigger

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

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 CH1~4 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.

l < (less than a time value): Trigger when the positive or negative pulse time of the

input signal is less than the specified time value.

l > (greater than a time value): Trigger when the positive or negative pulse time of

the input signal is greater than the specified time value.

l [--,--](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 less
than the specified upper limit of time value.

l --][--(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 less
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 30: Interval Trigger

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DropOut Trigger

DropOut trigger includes two types: Edge and state.

Edge

Trigger when the time interval (△T), measured from when the rising edge (or falling edge)
of the input signal passes through the trigger level to when the neighboring 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), measured from when the rising edge (or falling edge)
of the input signal passes through the trigger level to when the neighboring 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 CH1~4 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 31: 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

the knob to confirm.

3. Press the Source softkey; turn the Universal Knob to select CH1~4 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.

Figure 32: State DropOut Trigger

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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

l A positive runt pulse across through a lower threshold but not an upper threshold.
l A negative runt pulse across 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 CH1~4 as the trigger

source.

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

5. Press the LimitRange 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.

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Figure 33: 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 T3DSO2000 provides 4 patterns:
logical AND, OR, NAND and NOR combination of the channels. Each channel can set to
low, high or invalid.

Channel 1 High

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.

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

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

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

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

l 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 require a set 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 Limit Range softkey; then turn the Universal Knob to select the desired

option.

l <(Less Than) – when the pattern is present for less than a time value.

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l >(Greater Than) – When the pattern is present for greater than a time value.

The trigger occurs

l [--,--](In Range) – When the pattern is present for a time within a range of

values.

l --][-- (Out of Range) – When the pattern is present for a time outside of the

range of values.

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

Universal Knob to select the desired value.

Figure 34: Pattern Trigger

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Serial trigger and decode

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

decoding capabilities. This chapter introduces the method of triggering and decoding

these serial signals in detail.

The contents of this chapter:

u IIC Trigger and Serial Decode

u SPI Trigger and Serial Decode

u UART/RS232 Trigger and Serial Decode

u CAN Trigger and Serial Decode

u LIN Trigger and Serial Decode

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IIC Trigger and Serial Decode

The following section describes trigger and decoding for the IIC bus and is organized

as follows: ‘Setup for IIC Signals’, ‘IIC Triggering’ and ‘IIC Decode’.

Setup for IIC Signals

Setting the IIC (Inter-IC bus) signal includes two steps: Connecting the serial data

signal (SDA) and serial clock signal (SCK) to oscilloscope, specifying the threshold

voltage of each input signal.

1. Press Decode key to enter the DECODE function menu as Figure 35 shows.

Figure 35: IIC SIGNAL Menu

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

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

4. Press Signal softkey to enter the SIGNAL menu as Figure 36 shows.

Figure 36: IIC SIGNAL Menu

5. Set SCL (IIC‘s clock signal):

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

b. Press first Threshold softkey to set the IIC clock signal threshold voltage level by

the Universal Knob. The threshold voltage level is for decoding, and it will be

regarded as the trigger voltage level when set the trigger type to serial.

6. Set SDA (IIC‘s data signal):

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

b. Press the second Threshold softkey to select the IIC data signal threshold

voltage and then set the level by using the Universal Knob. The threshold voltage

level is for decoding, and it will be regarded as the trigger voltage level when the

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trigger type is set to serial.

(Tip: The SDA should be stable during the whole high clock cycle, otherwise it will be

interpreted as a start or stop condition (data transitioning while the clock is high).)

7. Press softkey to return previous menu.

8. Press Address softkey and select the length of the IIC signal address (7 bits or 10

bits).

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