GW Instek MDO-2000A Series, MDO-2000AG Series, MDO-2202AG, MDO-2302A, MDO-2302AG User Manual

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Mixed-Domain Oscilloscope

MDO-2000A Series

USER MANUAL

ISO-9001 CERTIFIED MANUFACTURER

June 2019

This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company.

The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures at any time without notice.

Good Will Instrument Co., Ltd. No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan

TABLE OF CONTENTS

Table of Contents

SAFETY INSTRUCTIONS .................................................. 3

GETTING STARTED .......................................................... 8

MDO-2000A Series Overview ....................................... 9

Appearance ................................................................ 12

Set Up ....................................................................... 23

Built-in Help .............................................................. 32

MEASUREMENT ............................................................ 33

Basic Measurement ................................................... 34

Automatic Measurement ............................................ 41

Cursor Measurement ................................................. 55

Math Operation ......................................................... 62

ADVANCED CONFIGURATION ....................................... 72

Acquisition ................................................................ 75

Segmented Memory Acquisition ................................ 80

Display ...................................................................... 92

Horizontal View ......................................................... 97

Vertical View (Channel) .............................................105

Bus Key Configuration ..............................................113

Trigger ......................................................................131

Search.......................................................................162

System Settings and Miscellaneous Settings ............171

ARBITRARY WAVE GENERATOR .................................... 176

Arbitrary Wave Generator Operation .........................177

SPECTRUM ANALYZER .................................................. 210

Spectrum Analyzer operation ....................................211

MDO-2000A series User Manual

APPLICATIONS ............................................................. 228

Introduction ............................................................. 229

Go-NoGo application ............................................... 232

DVM application ...................................................... 237

Data Log application ................................................ 239

Digital Filter application .......................................... 241

Mask application ..................................................... 243

FRA application ....................................................... 253

SAVE/RECALL ............................................................... 268

File Format/Utility ................................................... 269

Create/Edit Labels .................................................... 275

Save ......................................................................... 278

Recall ....................................................................... 285

Reference Waveforms ............................................... 291

FILE UTILITIES ............................................................. 293

HARDCOPY KEY ........................................................... 299

REMOTE CONTROL CONFIG ........................................ 303

Interface Configuration ............................................ 304

MAINTENANCE ............................................................ 314

FAQ .............................................................................. 320

APPENDIX .................................................................... 322

Updating the Firmware ............................................ 323

MDO-2000A Series Specifications ............................ 325

Probe Specifications ................................................ 330

Dimensions ............................................................. 332

Declaration of Conformity ........................................ 333

INDEX .......................................................................... 334

SAFETY INSTRUCTIONS

WARNING

Warning: Identifies conditions or practices that could result in injury or loss of life.

CAUTION

Caution: Identifies conditions or practices that could result in damage to the equipment or to other properties.

DANGER High Voltage

(Note)

Attention required Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that you must follow during operation and storage. Read the following before any operation to insure your safety and to keep the instrument in the best possible condition.

Safety Symbols

These safety symbols may appear in this manual or on the Product name.

MDO-2000A series User Manual

Do not dispose electronic equipment as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased.

General Guideline

WARNING

CAUTION

 Make sure the BNC input voltage does not

exceed 300Vrms.

 Never connect a hazardous live voltage to the

ground side of the BNC connectors. It might lead to fire and electric shock.

 Do not place any heavy object on the MDO-

2000A series.

 Avoid severe impact or rough handling that

leads to damaging the MDO-2000A series.

 Do not discharge static electricity to the MDO-

2000A series.

 Use only mating connectors, not bare wires, for

the terminals.

 Do not block the cooling fan opening.  Do not perform measurement at a power source

or building installation (Note below).

 Do not disassemble the MDO-2000A series

unless you are qualified.

Note

(Measurement categories) EN 61010-1:2010 specifies the measurement categories and their requirements as follows. The MDO-2000A series falls under category I.

 Measurement category IV is for measurements performed at the

source of low-voltage installation.

 Measurement category III is for measurements performed in the

building installation.

 Measurement category II is for measurements performed on

circuits directly connected to the low voltage installation.

 Measurement category I is for measurement performed on

circuits not directly connected to Mains.

Safety Guidelines

SAFETY INSTRUCTIONS

Power Supply

WARNING

 AC Input voltage: 100 - 240V AC, 50 - 60Hz,

auto selection. Power consumption: 40W for MDO-2000A series.

 Connect the protective grounding conductor of

the AC power cord to an earth ground, to avoid electrical shock.

Cleaning the MDO-2000A Series

 Disconnect the power cord before cleaning.  Use a soft cloth dampened in a solution of mild

detergent and water. Do not spray any liquid.

 Do not use chemicals containing harsh materials

such as benzene, toluene, xylene and acetone.

Operation Environment

 Location: Indoor, no direct sunlight, dust free,

almost non-conductive pollution (Note below)

 Relative Humidity: ≤80%, 40°C or below; ≤45%,

41°C ~ 50°C

 Altitude: < 2000m  Temperature: 0°C to 50°C

Note

(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The MDO-2000A series falls under degree 2.

Pollution refers to “addition of foreign matter, solid, liquid, or

gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”.

 Pollution degree 1: No pollution or only dry, non-conductive

pollution occurs. The pollution has no influence.

 Pollution degree 2: Normally only non-conductive pollution

occurs. Occasionally, however, a temporary conductivity caused by condensation must be expected.

 Pollution degree 3: Conductive pollution occurs, or dry, non-

conductive pollution occurs which becomes conductive due to condensation which is expected. In such conditions, equipment is normally protected against exposure to direct sunlight, precipitation, and full wind pressure, but neither temperature nor humidity is controlled.

MDO-2000A series User Manual

Storage environment

 Location: Indoor  Temperature: -10°C to 60°C  Humidity: Up to 93% RH (non-condensing) /

≤40ºC, up to 65% RH (non-condensing) / 41ºC ~ 60 ºC

Disposal

Do not dispose this instrument as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased. Please make sure discarded electrical waste is properly recycled to reduce environmental impact.

SAFETY INSTRUCTIONS

Green/ Yellow:

Earth

Blue:

Neutral

Brown:

Live (Phase)

Power cord for the United Kingdom

When using the oscilloscope in the United Kingdom, make sure the power cord meets the following safety instructions.

NOTE: This lead/appliance must only be wired by competent persons

WARNING: THIS APPLIANCE MUST BE EARTHED IMPORTANT: The wires in this lead are coloured in accordance with the following code:

As the colours of the wires in main leads may not correspond with the coloured marking identified in your plug/appliance, proceed as follows:

The wire which is coloured Green & Yellow must be connected to the Earth terminal marked with either the letter E, the earth symbol

or coloured Green/Green & Yellow.

The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or coloured Blue or Black.

The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red.

If in doubt, consult the instructions provided with the equipment or contact the supplier.

This cable/appliance should be protected by a suitably rated and approved HBC mains fuse: refer to the rating information on the equipment and/or user instructions for details. As a guide, a cable of 0.75mm2 should be protected by a 3A or 5A fuse. Larger conductors would normally require 13A types, depending on the connection method used.

Any exposed wiring from a cable, plug or connection that is engaged in a live socket is extremely hazardous. If a cable or plug is deemed hazardous, turn off the mains power and remove the cable, any fuses and fuse assemblies. All hazardous wiring must be immediately destroyed and replaced in accordance to the above standard.

MDO-2000A series User Manual

MDO-2000A Series Overview ....................................... 9

Integrated instruments and series lineup .............................................. 9

Main Features ............................................................................................ 9

Accessories ............................................................................................... 10

Appearance ................................................................ 12

Front panel .............................................................................................. 12

Rear Panel ................................................................................................ 19

MDO-2000A series ................................................................................... 19

MDO-2000AG series ................................................................................ 19

Display ...................................................................................................... 20

Set Up ........................................................................ 23

Tilt Stand .................................................................................................. 23

Power Up ................................................................................................. 23

First Time Use ......................................................................................... 24

How to Use This Manual ...................................................................... 26

Built-in Help .............................................................. 32

GETTING STARTED

This chapter describes the MDO-2000A series in a nutshell, including its main features and front / rear panel. After going through the overview, follow the Set Up section to properly set up the device for first time use. The Set Up section also includes an introduction on how to use this manual effectively.

GETTING STARTED

Model name

AWG

(1)

(2)

MDO-2000A

✗

✓

MDO-2000AG

✓

Model name

Frequency bandwidth

Input channels

Max. Real-time Sampling Rate

MDO-2102A/AG

100MHz

2GSa/s

MDO-2202A/AG

200MHz

2GSa/s

MDO-2302A/AG

300MHz

2GSa/s

Features

 8 inch, 800 x 480, WVGA TFT display.  Available from 100MHz to 300MHz.  Real-time sampling rate of 2GSa/s max.  Deep memory: 20M points record length.  Waveform capture rate of 120,000 waveforms

per second.

 Vertical sensitivity: 1mV/div~10V/div.

MDO-2000A Series Overview

Integrated instruments and series lineup

The MDO-2000A series have different hardware implemented instruments:

(1) Arbitrary Wave Generator (2) Spectrum Analyzer

The MDO-2000A series consists of 6 models. Note that throughout the user manual, the term “MDO-2000A series” refers to all models of the series, unless stated otherwise.

Main Features

MDO-2000A series User Manual

 Segmented Memory: Optimizes the acquisition

memory to selectively capture only the important signal details. Up to 29,000 successive waveform segments can be captured with a time-tag resolution of 4ns.

 Waveform Search: Allows the scope to search

for a number of different signal events.

 Arbitrary Wave generator: Full-function dual

channel arbitrary waveform generator.

 Spectrum Analyzer: A handy tool to perform

signal analysis in the frequency domain.

 Powerful embedded applications such as: Data

Logging, Digital Voltmeter, Go-No Go, Mask, Digital filter, FRA etc..

 On-screen Help.  32 MB internal flash disk.

Interface

 USB host port: front panel, for storage devices.  USB device port: rear panel, for remote control

or printing.

 Ethernet port as standard.  Probe compensation output with selectable

output frequency (1kHz ~ 200kHz).

 Calibration output.

Standard Accessories

Part number

Description N/A region dependent

Power cord

GTP-100B-4, for MDO2102A/AG

Passive probe; 100 MHz

GTP-200B-4, for MDO2202A/AG

Passive probe; 200 MHz

Accessories

GETTING STARTED

GTP-300B-4, for MDO-2302A/AG

Passive probe; 300 MHz

GTL-110

Test lead for AWG.

Standard Apps

Name

Description

Go-NoGo

Go-NoGo testing app.

DataLog

Waveform or image data logging app.

DVM

Digital Voltmeter app.

Digital Filter

High ,low or band pass digital filter for analog inputs.

Mask

Creates shape templates for signal comparison.

Remote Disk

network share drive.

Demo mode

with the GDB-03 demo board.

FRA

(For MDO-2000AG series only)

Optional Accessories

Part number

Description GDB-03

Demo board.

Drivers, others

USB driver

LabVIEW driver

Appearance

LCD

Variable knob and Select key

Autoset, Run/Stop, Single and Default settings

CH1~CH2, EXT TRIG

Trigger controls

Function keys

USB Host port, Probe Compensation terminals

Hardcopy key

Math, Reference and Bus keys

Bottom menu keys

Vertical controls

Option key

Menu key

Side menu keys

Power button

Horizontal controls

EXT TRIG

LCD Display

8” WVGA TFT color LCD. 800 x 480 resolution,

wide angle view display.

Menu Off Key

Use the Menu Off key to hide the onscreen menu system.

Option Key

The Option key is used to access installed options.

Front panel

MDO-2000A series User Manual

GETTING STARTED

Menu Keys

The side menu and bottom menu keys are used to make selections from the soft-menus on the LCD user interface.

To choose menu items, use the 7 Bottom menu keys located on the bottom of the display panel.

To select a variable or option from a menu, use the side menu keys on the side of the panel. See page 26 for details.

VARIABLE

POSITION

HORIZONTAL

TRIGGER

LEVEL

PUSH TO

ZERO

PUSH TO

ZERO

SCALE

Measure

Display

Cursor

Help

Test

Save/Recall

Acquire

Utility

Autoset

Run/Stop

Single

Default

Select

Set/Clear

Zoom

50 %

Force-Trig

POSITION

VERTICAL

MATH

REF

BUS

SCALESCALE

PUSH TO

ZERO

PUSH TO

ZERO

Digital Storage Oscilloscope

GDS-2202E

200 MHz 1 GS/s

Visual Persistence Oscilloscope

Side menu keys

Bottom menu keys

Hardcopy Key

The Hardcopy key is a quick-save or quick-print key, depending on its configuration. For more information see pages 300 (save) or 300 (print).

Variable Knob and Select Key

Select

VARIABLE

The Variable knob is used to increase/decrease values or to move between parameters.

The Select key, when lit up, is used to make selections.

MDO-2000A series User Manual

Function Keys

The Function keys are used to enter and configure different functions on the MDO-2000A series.

Measure

Configures and runs automatic measurements.

Cursor

Configures and runs cursor measurements.

APP

Configures and runs GW Instek applications.

Acquire

Configures the acquisition mode, including Segmented Memory acquisition.

Display

Configures the display settings.

Help

Shows the Help menu.

Save/Recall

Used to save and recall waveforms, images, panel settings.

Utility

Configures the Hardcopy key, display time, language, probe compensation and calibration. It also accesses the file utilities menu.

Autoset

Press the Autoset key to automatically set the trigger, horizontal scale and vertical scale.

GETTING STARTED

Run/Stop Key

Run/Stop

Press to Freeze (Stop) or continue (Run) signal acquisition (page 37). The run stop key is also used to run or stop Segmented Memory acquisition (page 83).

Single

Sets the acquisition mode to single triggering mode.

Default Setup

Default

Resets the oscilloscope to the default settings.

Horizontal Controls

The horizontal controls are used to change the position of the cursor, set the time base settings, zoom into the waveforms/traces and search for events.

Horizontal Position

POSITION

PUSH TO

ZERO

The Position knob is used to position the waveforms/traces horizontally on the display screen. Pressing the knob will reset the position to zero.

SCALE

The Scale knob is used to change the horizontal scale (TIME/DIV).

Zoom

Press Zoom in combination with the horizontal Position knob.

Play/Pause

The Play/Pause key allows you to view each search event in succession – to effectively “play” through each search event. It is also used to play through a waveform/trace in zoom mode.

MDO-2000A series User Manual

The Search key accesses the search function menu to set the search type, source and threshold.

Search Arrows

Use the arrow keys to navigate the search events.

Set/Clear

Use the Set/Clear key to set or clear points of interest when using the search function.

Trigger Controls

The trigger controls are used to control the trigger level and options.

Level Knob

LEVEL

Used to set the trigger level. Pressing the knob will reset the level to zero.

Trigger Menu Key

Used to bring up the trigger menu.

50% Key

50 %

Sets the trigger level to the half way point (50%).

Force - Trig

Force-Trig

Press to force an immediate trigger of the waveform.

Vertical POSITION

POSITION

PUSH TO

ZERO

Sets the vertical position of the waveform/trace. Push the knob to reset the vertical position to zero.

Channel Menu Key

CH1

Press the CH1~4 key to set and configure the corresponding channel.

GETTING STARTED

(Vertical)SCALE Knob

SCALE

Sets the vertical scale of the channel (TIME/DIV).

External Trigger Input

EXT TRIG

Accepts external trigger signals (page 131). Only on 2 channel models.

Input impedance: 1MΩ Voltage input: ±15V (peak), EXT trigger capacitance: 16pF.

Math Key

MATH

Use the Math key to set and configure math functions.

Reference Key

REF

Press the Reference key to set or remove reference waveforms.

BUS Key

BUS

The Bus key is used for serial bus (UART, I2C, CAN, LIN) configuration.

Channel Inputs

CH1

Accepts input signals. Input impedance: 1MΩ. Capacitance: 16pF CAT I

USB Host Port

Type A, 1.1/2.0 compatible. Used for data transfer.

MDO-2000A series User Manual

Ground Terminal

Accepts the DUT ground lead for common ground.

Probe Compensation Output

The probe compensation output is used for probe compensation. It also has an adjustable output frequency.

By default this port outputs a 2Vpp, square wave signal at 1kHz for probe compensation.

Please see page 173 for details.

Power Switch

POWER

Used to turn the power on/off.

: ON

: OFF

GETTING STARTED

Calibration output

Key lock Power input socket

Fan

Go/No Go output

LAN portUSB Device port

Calibration output

Key lock Power input socket

Fan

Go/No Go output

LAN portUSB Device port

AWG channels output

Calibration Output

Outputs the signal for vertical scale accuracy calibration (page 315).

Rear Panel

MDO-2000A series

MDO-2000AG series

MDO-2000A series User Manual

USB Device Port

The USB Device port is used for remote control.

LAN (Ethernet) Port

The LAN port is used for remote control over a network or when combined with the Remote Disk app, allows the scope to be mounted to a share disk.

Power Input Socket

Power cord socket accepts AC mains, 100 ~ 240V, 50/60Hz.

For power up sequence, see page

23.

Security Slot

Kensington security slot compatible.

Go-No Go Output

Outputs Go-No Go test results (page 232) as a 500us pulse signal.

AWG Output

GEN 1

Output the GEN1 or GEN2 signal from the Arbitrary Wave Generator function. (see page 178).

Display

Below is a general description of the main display. As the display changes while activating the different functions of the MDO2000A/AG, please refer to each function sub-chapters of this user manual for more details.

GETTING STARTED

Memory bar

Reference

waveform

Analog

Waveform

Bus

decoding

Channel status Horizontal status

Trigger configuration

Waveform

frequency

Date and time

Trigger position

Trigger status

Acquisition mode

Trigger level

Channel Indicators

Memory length

and sample rate

Analog Waveforms

Shows the analog input signal waveforms.

Channel 1: Yellow

Channel 2: Blue

Bus decoding

Shows serial bus data decoding. The values are displayed in hex or binary.

Reference waveform

Reference waveform(s) can be displayed for reference, comparison or other operations.

Channel Indicators

The channel indicators for each activated channels are located at the zero volt level of each signals. Any active channel is shown with a solid color.

Example:

Bus indicator(B)

Reference waveform indicator

Math indicator

Trigger Position

Shows the position of the trigger.

Horizontal Status

Shows the horizontal scale and position.

Date and Time

Current date and time (page 173).

Trigger Level

Shows the trigger level on the graticule.

Memory Bar

MDO-2000A series User Manual

The ratio and the position of the displayed waveform compared to the internal memory (page

97).

Trigger Status

Trig’d

Triggered.

PrTrig

Pre-trigger.

Trig?

Not triggered, display not updated.

Stop

Trigger stopped. Also appears in Run/Stop (page 37).

Roll

Roll mode.

Auto

Auto trigger mode.

For trigger details, see page 131.

Acquisition Mode

Normal mode

Peak detect mode

Average mode

For acquisition details, see page 75.

Signal Frequency

Shows the trigger source frequency.

Indicates the frequency is less than 2Hz (lower frequency limit).

Trigger Configuration

Trigger source, slope, voltage and coupling.

Horizontal Status

Horizontal scale, horizontal position.

For trigger details, see page 131.

Channel Status

Channel 1, DC coupling, 2V/Div.

For channel details, see page 105.

Set Up

Tilt

To tilt, pull the legs forward, as shown below.

Stand

To stand the scope upright, push the legs back under the casing as shown below.

Requirements

The MDO-2000A series accepts line voltages of 100 ~ 240V at 50 or 60Hz.

Step

1. Connect the power cord to

the rear panel socket.

Tilt Stand

GETTING STARTED

Power Up

2. Press the POWER key. The

display becomes active in ~ 30 seconds.

: ON

: OFF

POWER

Note

The MDO-2000A series recovers the state right before the power is turned OFF. The default settings can be recovered by pressing the Default key on the front panel. For details, see page 285.

First Time Use

Background

This section describes how to connect, adjust the scale and compensate the probe. Before operating the MDO-2000A series in a new environment, run these steps to make sure the instrument performs at its full potential.

1. Power On

Follow the procedures on the previous page.

2. Firmware

Update to the latest firmware.

Page 323

3. Set the Date and Time

Set the date and time.

Page 173.

4. Reset System

Reset the system by recalling the factory settings. Press the Default key on the front panel. For details, see page 285.

Default

5. Connect the probe

Connect the probe that you will use for measurements to the Channel 1 input and to the probe compensation output. This output provides by default a 2V peak to peak, 1kHz square wave for signal compensation.

Set the probe attenuation to x10 if the probe has adjustable attenuation.

MDO-2000A series User Manual

GETTING STARTED

EXT TRIG

x10

X 10

X 1

CH1

6. Capture Signal (Autoset)

Press the Autoset key. A square waveform appears on the center of the screen. For Autoset details, see page 35.

Autoset

7. Select Vector Waveform

Press the Display key, and set the display to Vector on the bottom menu.

Display

MDO-2000A series User Manual

8. Compensate the probe

Turn the adjustment point on the probe to make the square waveform as flat as possible.

9. Start operations

Continue with the other operations.

Measurement: page 33

Configuration: page 72

Using the Spectrum Analyzer: page 210.

Applications: page 228 Save/Recall: page 268

File Utilities: page 293

Hardcopy key: page 299

Remote Control: page 303

Maintenance: page 314

Background

This section describes the conventions used in this manual to operate the MDO-2000A series.

Throughout the manual any reference to pressing a menu key refers to the keys directly below or beside any menu icons or parameters.

Under

Compensation

Normal

Over

Compensation

How to Use This Manual

GETTING STARTED

When the user manual says to “toggle” a value or

parameter, press the corresponding menu item. Pressing the item will toggle the value or parameter.

Active parameters are highlighted for each menu item. For example in the example below, Coupling is currently set to DC.

If a menu item can be toggled from one value or parameter to another, the available options will be visible, with the current option highlighted. In the example below the slope can be toggled from a rising slope to a falling slope or either slope.

Menu item

Parameter

Menu item

Active

parameter

Optional

parameters

Menu item

Selecting a Menu Item, Parameter or Variable

When the user manual says to “select” a value

from one of the side menu parameters, first press the corresponding menu key and use the Variable knob to either scroll through a parameter list or to increase or decrease a variable.

Example 1

MDO-2000A series User Manual

3. Press a bottom menu key to access

the side menu.

4. Press a side menu key to either set

a parameter or to access a sub menu.

5. If accessing a sub menu or setting

a variable parameter, use the Variable knob to scroll through menu items or variables. Use the Select key to confirm and exit. The Select key is lit-up when such selection can be made.

Select

VARIABLE

6. Press the same bottom menu key

again to reduce the side menu.

Example 2

For some variables, a circular arrow icon indicates that the variable for that menu key can be edited with the Variable knob.

7. Press the desired menu key to select it. The

circular arrow will become highlighted.

GETTING STARTED

8. Use the Variable knob to edit the value.

Toggling a Menu Parameter

9. Press the bottom menu key

to toggle the parameter.

Reduce Side Menu

10. To reduce the side menu, press the

corresponding bottom menu that brought up the side menu.

For example: Press the Source soft-key to reduce the Source menu.

MDO-2000A series User Manual

Reduce Lower Menu

11. Press the relevant function

key again to reduce the bottom menu. For example: press the Trigger Menu key to reduce the trigger menu.

POSITION

SCALE

TRIGGER

LEVEL

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

SCALE

Test

Save/Recall

Acquire

Utility

Autoset

Run/Stop

Single

Default

Zoom

50 %

Force-Trig

Remove All Menus

12. Press the Menu Off key to

reduce the side menu, press again to reduce the bottom menu.

VARIABLE

POSITION

HORIZONTAL

POSITION

VERTICAL

MATH

REF

BUS

SCALE

TRIGGER

LEVEL

PUSH TO

ZERO

SCALESCALESCALE

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO ZERO

SCALE

CH1 CH2 CH3 CH4

Measure

Display

Cursor

Help

Test

Save/Recall

Acquire

Utility

Autoset

Run/Stop

Single

Default

Select

Set/Clear

Zoom

CH1 CH2 CH3 CH4

50 %

Force-Trig

GETTING STARTED

Remove OnScreen Messages

13. The Menu Off key can also be

used to remove any on screen messages.

VARIABLE

POSITION

HORIZONTAL

POSITION

VERTICAL

MATH

REF

BUS

SCALE

TRIGGER

LEVEL

PUSH TO

ZERO

SCALESCALESCALE

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

SCALE

CH1 CH2 CH3 CH4

Measure

Display

Cursor

Help

Test

Save/Recall

Acquire

Utility

Autoset

Run/Stop

Single

Default

Select

Set/Clear

Zoom

CH1 CH2 CH3 CH4

50 %

Force-Trig

MDO-2000A series User Manual

Panel Operation

1. Press the Help key. The display

changes to Help mode.

Help

2. Use the Variable knob to scroll up and down

through the Help contents. Press Select to view the help on the selected item.

Example: Help on the Display key

Home Key

Press the Home key to return to the main help screen.

Go Back

Press the Back key to go to the previous menu page.

Exit

Press the Help key again or press the Exit key to exit the Help mode.

Help

Built-in Help

The Help key accesses a context sensitive help menu. The help menu contains information on how to use the front panel keys.

MEASUREMENT

Basic Measurement ................................................... 34

Channel Activation ................................................................................. 34

Autoset ..................................................................................................... 35

Run/Stop ................................................................................................. 37

Horizontal Position/Scale .................................................................... 38

Vertical Position/Scale .......................................................................... 39

Automatic Measurement ............................................ 41

Measurement Items ................................................................................ 41

Add Measurement .................................................................................. 45

Remove Measurement ........................................................................... 46

Gated mode ............................................................................................. 47

Display All mode .................................................................................... 49

High Low Function ................................................................................ 50

Statistics .................................................................................................... 51

Reference Levels ..................................................................................... 53

Cursor Measurement ................................................. 55

Use Horizontal Cursors ......................................................................... 55

Use Vertical Cursors .............................................................................. 58

Math Operation ......................................................... 62

Basic Math Overview & Operators ..................................................... 62

Addition/Subtraction/Multiplication/Division ............................... 62

FFT Overview & Window Functions ................................................ 64

FFT Operation ........................................................................................ 65

Advanced Math Overview .................................................................... 67

Advanced Math Operation ................................................................... 68

MEASUREMENT

MDO-2000A series User Manual

Activate Channel

To activate an input channel, press a channel key.

When activated, the channel key will light up. The corresponding channel menu will also appear.

CH1 CH1

Each channel is associated with the color shown

beside each channel’s vertical SCALE dial: CH1:

yellow, CH2: blue

When a channel is activated, it is shown above the bottom menu system.

CH1 CH3CH2 CH4

Basic Measurement

This section describes the basic operations required in capturing, viewing and measuring the input signal. For more detailed or more specific operations, see the following chapters.

 Advanced Configuration → from page 72  Arbitrary Wave Generator → from page 176  Spectrum Analyzer→ from page 210  Applications→ from page 228

Before operating the oscilloscope, please see the Getting Started chapter, page 8.

Channel Activation

De-activate Channel

To de-activate a channel, press the corresponding channel key again. If the channel menu is not open, press the channel key twice (the first press shows the Channel menu).

CH1 CH1

Default Setup

To activate the default state, press Default (this will reset the system and recall the factory defaults, see page 285).

Default

Autoset

Background

The Autoset function automatically configures the panel settings to position the input signal(s) to the best viewing condition. The MDO-2000A Series automatically configures the following parameters:

 Horizontal scale  Vertical scale  Trigger source channel

There are two operating modes for the Autoset function: Fit Screen Mode and AC Priority Mode.

Fit Screen Mode will fit the waveform to the best scale, including any DC components (offset). AC priority mode will scale the waveform to the screen by removing any DC component.

Panel Operation

1. Connect the input signal to the

MDO-2000A series and press the Autoset key.

Autoset

2. The waveform appears in the center of the

display.

MEASUREMENT

MDO-2000A series User Manual

Before

After

3. To undo Autoset, press Undo

Autoset from the bottom menu.

Change modes

4. Choose between Fit Screen Mode

and AC Priority Mode from the bottom menu.

5. Press the Autoset key again to use

Autoset in the new mode.

Autoset

Fit Screen Mode

AC Priority

Limitation

Autoset does not work in the following situations:

 Input signal frequency is less than 20Hz  Input signal amplitude is less than 10mV

Note

The Autoset key does NOT automatically activate the channels to which input signals are connected.

Run/Stop

Background

By default, the waveform on the display is constantly updated (Run mode). Freezing the waveform by stopping signal acquisition (Stop mode) allows flexible observation and analysis. To enter Stop mode, two methods are available: pressing the Run/Stop key or using the Single Trigger mode.

Stop mode icon

When in Stop mode, the Stop icon appears at the top of the display.

Triggered icon

Freeze Waveform using the Run/Stop Key

Press the Run/Stop key once. The Run/Stop key turns red. The waveform and signal acquisition freezes.

Stop:

Run/Stop Run/Stop

To unfreeze, press the Run/Stop key again. The Run/Stop key turns green again.

Run:

Run/Stop Run/Stop

Freeze Waveform by Single Trigger Mode

Press the Single key to go into the Single Trigger mode. The Single key turns bright white.

In the Single Trigger mode, the scope will be put into the pretrigger mode until the scope encounters the next trigger point. After the scope has triggered, it will remain in Stop mode, until the Single key is pressed again or the Run/Stop key is pressed.

SingleSingle

Waveform Operation

The waveform can be moved or scaled in both Run and Stop mode, but in different manners. For details, see page 97 (Horizontal position/scale) and page 105 (Vertical position/scale).

MEASUREMENT

MDO-2000A series User Manual

Set Horizontal Position

The horizontal position knob moves the waveform left and right.

POSITION

PUSH TO

ZERO

Set Horizontal Position to 0

Pressing the horizontal position knob will reset the horizontal position to 0.

POSITION

PUSH TO

ZERO

Alternatively, pressing the Acquire key and then pressing Reset H Position to 0s from the bottom menu will also reset the horizontal position.

Acquire

As the waveform moves, the display bar on the top of the display indicates the portion of the waveform currently shown on the display and the position of the horizontal marker on the waveform.

Position Indicator

The horizontal position is shown at the bottom of the display grid to the right of the H icon.

Select Horizontal Scale

To select the timebase, turn the horizontal SCALE knob; left (slow) or right (fast).

SCALE

Horizontal Position/Scale

For more detailed configuration, see page 97.

MEASUREMENT

Range

1ns/div ~ 100s/div, 1-2-5 increments

The scale is displayed to the left of the H icon at the bottom of the screen.

Display bar

The display bar indicates how much of the waveform is displayed on the screen at any given time. Changes to timebase will be reflected on the display bar.

Fast

Medium

Slow

Stop mode

In the Stop mode, the waveform size changes according to the scale.

Note

The Sample rate changes according to the timebase and record length. See page 78.

Set Vertical Position

To move the waveform up or down, turn the vertical position knob for each channel.

POSITION

PUSH TO

ZERO

Vertical Position/Scale

For more detailed configuration, see page 105.

MDO-2000A series User Manual

Push the vertical position knob to reset the position to 0.

As the waveform moves, the vertical position of the channel indicator appears on the display.

POSITION

PUSH TO

ZERO

Run/Stop mode

The waveform can be moved vertically in both Run and Stop mode.

Select Vertical Scale

To change the vertical scale, turn the vertical SCALE knob; left (down) or right (up).

SCALE

Range

1mV/div ~ 10V/div

1-2-5 increments

The vertical scale indicator for each channel on the bottom of the display changes accordingly.

MEASUREMENT

V/I Measurements

Time Meas.

Delay Meas.

Overview

FPREShoot

RPREShoot

FOVShoot

ROVShoot

Cycle Area

Area

Cycle RMS

RMS

Cycle Mean

Mean

Low

High

Amplitude

Min

Max

Pk-Pk

Frequency

Dutycycle

-Width

+Width

FallTime

RiseTime

Period

-Edges

+Edges

-Pulses

+Pulses

% Flicker

Flicker Idx

(A-B)

(A+B)

A1+A2

Voltage/Current Measurement

Pk-Pk

(peak to peak)

Difference between positive and negative peak. (=max − min)

Max

Positive peak.

Min

Negative peak.

FRR

FRF

FFR

Phase

LFF

LFR

LRF

LRR

FFF

Automatic Measurement

The automatic measurement function measures and updates major items for Voltage/Current, Time, and Delay type measurements.

Measurement Items

MDO-2000A series User Manual

Amplitude

Difference between the global high value and the global low value, measured over the entire waveform or gated region. (=high − low)

High

Global high voltage. See page 50 for details.

Low

Global low voltage. See page 50 for details.

Mean

The arithmetic mean value is calculated for all data samples as specified by the Gating option.

Cycle Mean

The arithmetic mean value is calculated for all data samples within the first cycle found in the gated region.

RMS

The root mean square of all data samples specified by the Gating option.

Cycle RMS

The root mean square value is calculated for all data samples within the first cycle found in the gated region.

Area

Measures the positive area of the waveform and subtracts it from the negative area. The ground level determines the division between positive and negative areas.

Cycle Area

The Summation based on all data samples within the first cycle found in the gated region.

ROVShoot

Rise overshoot

MEASUREMENT

FOVShoot

Fall overshoot

RPREShoot

Rise preshoot

FPREShoot

Fall preshoot

Time Measurement

Frequency

Frequency of the waveform.

Period

Waveform cycle time. (=1/Freq)

RiseTime

The time required for the leading edge of the first pulse to rise from the low reference value to the high reference value.

FallTime

The time required for the falling edge of the first pulse to fall from the high reference value to the low reference value.

+Width

Positive pulse width.

–Width

Negative pulse width.

Duty Cycle

Ratio of signal pulse compared with whole cycle. =100x (Pulse Width/Cycle)

+Pulses

Measures the number of positive pulses.

-Pulses

Measures the number of negative pulses.

+Edges

Measures the number of positive edges.

MDO-2000A series User Manual

-Edges

Measures the number of negative edges.

% Flicker

(A-B)

(A+B)

Ratio in percentage of the peak-to-peak value to the sum of peak values.

Flicker Idx

A1+A2

Ratio of the area above the average to the total area during one cycle.

Delay Measurement

FRR

Time between:

Source 1 first rising edge and Source 2 first rising edge.

FRF

Time between: Source 1 first rising edge and Source 2 first falling edge.

FFR

Time between: Source 1 first falling edge and Source 2 first rising edge.

FFF

Time between: Source 1 first falling edge and Source 2 first falling edge.

LRR

Time between: Source 1 first rising edge and Source 2 last rising edge.

LFR

Time between: Source 1 first rising edge and Source 2 last falling edge.

LRF

Time between: Source 1 first falling edge and Source 2 last rising edge.

MEASUREMENT

LFF

Time between: Source 1 first falling edge and Source 2 last falling edge.

Phase

The phase difference of two signals, calculated in degrees.

360x

Note

The in-built help system can be used to see detailed automatic measurement definitions.

Add Measurement Item

1. Press the Measure key.

Measure

2. Press Add Measurement from the

bottom menu.

3. Choose either a V/I, Time or Delay

measurement from the side menu and choose the type of measurement you wish to add.

V/I (Voltage/ Current)

Pk-Pk, Max, Min, Amplitude, High, Low, Mean, Cycle Mean, RMS, Cycle RMS, Area, Cycle Area, ROVShoot, FOVShoot, RPREShoot, FPREShoot

Add Measurement

The Add Measurement function allows you to add up to eight automatic measurement items on the bottom of the screen from any channel source.

MDO-2000A series User Manual

Time

Frequency, Period, RiseTime, FallTime, +Width, –Width, Duty Cycle, +Pulses, -Pulses, +Edges, Edges, %Flicker, FlickerIndex

Delay

FRR, FRF, FFR, FFF, LRR, LRF, LFR, LFF, Phase

4. All of the chosen automatic measurements will

be displayed in a window on the bottom of the screen. The channel number and channel color indicate the measurement source. For the analog inputs: yellow = CH1, blue = CH2,

Choose a Source

The channel source for measurement items can be set either before or when selecting a measurement item.

5. To set the source, press either the

Source1 or Source2 key from the side menu and choose the source.

Range

Source1: CH1~CH2, Math,

Source2: CH1~CH2, Math

Note

Source 2 is only applicable to Delay measurements.

Remove Measurement

Individual measurements can be removed at any time using the Remove Measurement function.

MEASUREMENT

Remove Measurement Item

1. Press the Measure key.

Measure

2. Press Remove Measurement from the

bottom menu.

3. Press Select Measurement and select

the item that you want to remove from the measurement list.

Remove All Items

Press Remove All to remove all the measurement items.

Set Gating Mode

1. Press the Measure key.

Measure

2. Press Gating from the bottom

menu.

3. Choose one of the gating modes

from the side menu: Off (full record), Screen, Between Cursors.

Gated mode

Some automatic measurements can be limited to a “gated” area

between cursors. Gating is useful for measuring a magnified waveform or when using a fast time base. The Gated mode has three possible configurations: Off (Full Record), Screen and Between Cursors.

MDO-2000A series User Manual

Cursors On Screen

If Between Cursors is selected, the cursor positions can be edited by using the cursor menu.

Page 55

MEASUREMENT

View Measurement Results

1. Press the Measure key.

Measure

2. Press Display All from the bottom

menu.

3. Press Source from the side menu

and choose a measurement source.

Range

CH1~CH2, Math

4. The results of Voltage and Time type

measurements appear on the display.

Remove Measurements

To remove the measurement results, press OFF.

Delay Measurements

Delay type measurements are not available in this mode as only one channel is used as the source. Use the individual measurement mode (page 45) instead.

Display All mode

Display All mode shows and updates all items from Voltage and Time type measurements.

MDO-2000A series User Manual

Background

The High-Low function is used to select the method for determining the value of the High-Low measurement values.

Auto

Automatically chooses the best high-low setting for each waveform when measuring.

Histogram

Uses histograms to determine the high-low values. This mode ignores any pre-shoot or overshoot values. This mode is particularly useful for pulse-type waveforms

low

high

Min-max

Sets the high-low values as the minimum or maximum measured values.

low

high

Set High-Low

1. Press the Measure key.

Measure

2. Press High-Low from the bottom

menu.

High Low Function

3. Select the type of High-Low settings from the

side menu.

High-Low Settings:

Histogram, Min-Max, Auto

Restore Default High-Low Settings

To return to the default High-Low settings, press Set to Defaults.

Statistics

Background

The Statistics function can be used to view a number of statistics for the selected automatic measurements. The following information is displayed with the Statistics function:

Value

Currently measured value

Mean

The mean value is calculated from a number of automatic measurement results. The number of samples used to determine the mean can be user-defined.

Min

The minimum value observed from a series of measured results for the selected automatic measurement items.

MEASUREMENT

MDO-2000A series User Manual

Max

The maximum value observed from a series of measured results for the selected automatic measurement items.

Standard Deviation

The variance of the currently measured value from the mean. The standard deviation equals the squared root of the variance value. Measuring the standard deviation can, for example, determine the severity of jitter in a signal. The number of samples used to determine the standard deviation can be user-defined.

Panel Operation

1. Press the Measure key.

Measure

2. Select at least one automatic

measurement.

Page 45

3. Press Statistics from the bottom

menu.

4. Set the number of samples to be

used in the mean and standard deviation calculations.

Samples:

2~1000

5. Press Statistics and turn Statistics

on.

6. The statistics for each automatic measurement

will appear at the bottom of the display in a table.

MEASUREMENT

Reset Statistics

To reset the standard deviation calculations, press Reset Statistics.

Background

The reference level settings determine the measurement threshold levels for some measurements like the Rise Time measurement.

High Ref: Sets the high reference level.

Mid Ref: Sets the middle reference for the first and second waveforms.

Low Ref: Sets the low reference level.

Panel Operation

1. Press the Measure key.

Measure

2. Press Reference Levels from the

bottom menu.

Reference Levels

MDO-2000A series User Manual

3. Set the reference levels from the side menu.

Ensure the reference levels do not cross over.

High Ref

0.0% ~ 100%

Mid Ref

0.0% ~ 100%

Low Ref

0.0% ~ 100%

Default Settings

4. Press Set to Defaults to set the

reference levels back to the default settings.

MEASUREMENT

Panel Operation

1. Press the Cursor key once.

Cursor

2. Press H Cursor from the bottom

menu if it is not already selected.

3. When the H Cursor is selected,

repeatedly pressing the H Cursor key or the Select key will toggle which cursor is selected.

Select

Range

Description

Left cursor ( ) movable, right cursor position fixed

Right cursor ( ) movable, left cursor position fixed

Left and right cursor ( + ) movable together

4. The cursor position

information appears on the top left hand side of the screen

Cursor

Hor. position, Voltage/Current

Cursor

Hor. position, Voltage/Current

Delta (difference between cursors)

dV/dt or dI/dt

Cursor Measurement

Horizontal or vertical cursors are used to show the position and values of waveform measurements and math operation results. These results cover voltage, time, frequency and other math operations. When the cursors (horizontal, vertical or both) are activated, they will be shown on the main display unless turned off.

Use Horizontal Cursors

MDO-2000A series User Manual

5. Use the Variable knob to move the

movable cursor(s) left or right.

VARIABLE

(Note)

The selected cursor(s) will move along the active waveform. To move along another waveform, select its corresponding channel and press the cursor key again to re-enter the cursor menu.

Select Units

6. To change the units of the

horizontal position, press H Unit.

Units

S, Hz, % (ratio), ˚(phase)

Phase or Ratio Reference

7. To set the 0% and 100% ratio or the

0˚ and 360˚ phase references for the current cursor positions, press Set Cursor Positions As 100%.

Example

Horizontal

cursors

MEASUREMENT

FFT

FFT cursors can use different units. For FFT details, see page

64.

Cursor

Hor. position, dB/Voltage

Cursor

Hor. Position, dB/Voltage

Delta (difference between cursors)

dV/dt or d/dt

Example

Horizontal

cursors

XY Mode

XY mode cursors measure a number of X by Y measurements. See page 76.

Cursor

Time, rectangular, polar coordinates, product, ratio.

Cursor

Time, rectangular, polar coordinates, product, ratio.

Delta (difference between cursors)

MDO-2000A series User Manual

Example

Horizontal

cursors

Panel Operation/ Range

1. Press the Cursor key twice.

Cursor

2. Press V Cursor from the bottom

menu if it is not already selected.

3. When the V Cursor is selected,

repeatedly pressing the V Cursor key or the Select key will toggle which vertical cursor is selected.

Select

Range

Upper cursor movable, lower cursor position fixed

Lower cursor movable, upper cursor position fixed

Upper and lower cursor movable together

Use Vertical Cursors

MEASUREMENT

4. The cursor position

information appears on the top left hand side of the screen.

Time: cursor 1, cursor 2

Voltage/Current: cursor1, cursor2

Delta (difference between cursors)

dV/dt or dI/dt

5. Use the Variable knob to move the

cursor(s) up or down.

VARIABLE

Select Units

6. To change the units of the vertical

position, press V Unit.

Units

Base (source wave units), % (ratio)

Base or Ratio Reference

7. To set the 0% and 100% ratio

references for the current cursor position, press Set Cursor Positions As 100%.

Example

Horizontal

cursors

Vertical cursors

MDO-2000A series User Manual

FFT

FFT has different content. For FFT details, see page 64.

Frequency/Time: cursor1, cursor2

dB/V: cursor1, cursor2

Delta (difference between cursors)

d/dt

Example

Horizontal

cursors

Vertical cursors

XY Mode

XY mode cursors measure a number of X by Y measurements. See page 76.

Cursor

Rectangular, polar co-ordinates, product, ratio.

Cursor

Rectangular, polar co-ordinates, product, ratio.

Delta (difference between cursors)

MEASUREMENT

Example

Horizontal

cursors

Vertical cursors

MDO-2000A series User Manual

Background

The Math function performs basic math functions (addition, subtraction, multiplication, division) on the input signals or the reference waveforms. The resultant waveform will be shown on the screen in real-time.

Addition (+)

Adds the amplitude of two signals.

Source

CH1~2, Ref1~4

Subtraction (–)

Extracts the amplitude difference between two signals.

Source

CH1~2, Ref1~4

Multiplication (×)

Multiplies the amplitude of two signals.

Source

CH1~2, Ref1~4

Division (÷)

Divides the amplitude of two signals.

Source

CH1~2, Ref1~4

Panel Operation

1. Press the Math key.

MATH

2. Press the Math key on the lower

bezel.

3. Select Source 1 from the side menu

Range

CH1~2, Ref1~4

Math Operation

Basic Math Overview & Operators

Addition/Subtraction/Multiplication/Division

MEASUREMENT

4. Press Operator to choose the math

operation.

Range

+, -, ×, ÷

5. Select Source 2 from the side menu.

Range

CH1~2, Ref1~4

6. The math measurement result appears on the

display. The vertical scale of the math waveform appears at the bottom of the screen.

From left: Math function, source1, operator, source2, Unit/div

Example

Math

Source 2

Source 1

Position and Unit

To move the math waveform vertically, press the Position key from the side menu and use the Variable knob to set the position.

Range

–12.00 Div ~ +12.00 Div

MDO-2000A series User Manual

To change the unit/div settings, press Unit/div, then use the Variable knob to change the unit/div.

The units that are displayed depend on which operator has been selected, and whether the probe for the selected channel has been set to voltage or current.

Operator:

Unit/div:

Multiplication Division Addition/Subtraction

VV, AA or W V/V, A/A V or A

Turn Off Math

To turn off the Math result from the display, press the Math key again.

MATH

Background

The FFT function performs a Fast Fourier Transform on one of the input signals or the reference waveforms. The resultant spectrum will be shown on the screen in real-time. Four types of window function are available: Hanning, Hamming, Rectangular, and Blackman, as described below.

Hanning

Frequency resolution

Good

Amplitude resolution

Not good

Suitable for....

Frequency measurement on periodic waveforms

Hamming

Frequency resolution

Good

Amplitude resolution

Not good

FFT Overview & Window Functions

Suitable for....

Frequency measurement on periodic waveforms

Rectangular

Frequency resolution

Very good

Amplitude resolution

Bad

Suitable for....

Single-shot phenomenon (this mode is the same as having no window at all)

Blackman

Frequency resolution

Bad

Amplitude resolution

Very good

Suitable for....

Amplitude measurement on periodic waveforms

(Note)

For more complete measures and functions in the frequency domain of a signal, please also refer to the Spectrum Analyzer section of the MDO-2000A series on page 210.

FFT Operation

Panel Operation

1. Press the Math key.

MATH

2. Press FFT from the bottom menu.

3. Select the Source from the side

menu.

Range

CH1~2, Ref~4

4. Press the Vertical Units key from

the side menu to select the vertical units used.

Range

Linear RMS, dBV RMS

MEASUREMENT

MDO-2000A series User Manual

5. Press the Window key from the side

menu and select the window type.

Range

Hanning, Hamming, Rectangular, and Blackman.

6. The FFT result represents the frequency-

domain representation of a signal. Hence, the horizontal scale changes from time to frequency, and the vertical scale from voltage/current to dB/RMS.

Math

Source

Position and Scale

To move the FFT waveform vertically, press Vertical until the Div parameter is highlighted and then use the Variable knob.

Range

–12.00 Div ~ +12.00 Div

To select the vertical scale of the FFT waveform, press Vertical until the dB or voltage parameters are highlighted and then use the Variable knob.

Range

2mV~1kV RMS (Linear RMS), 1~20 dB (dB VRMS)

MEASUREMENT

Horizontal Position and Scale

To move the FFT waveform horizontally, press Horizontal until the Frequency parameter is highlighted and then use the Variable knob.

Range

0Hz ~ half of the sampling frequency

To select the horizontal scale of the FFT waveform, press Horizontal repeatedly until the Hz/div parameter is highlighted and then use the Variable knob.

Background

The advanced math function allows complex math expressions to be created based on the input sources, reference waveforms or even the automatic measurements available from the Measure menu (see page 41).

An overview of each of the major parameters that can be used in the advanced math function are shown below:

Expression

Displays the function expression as it is created.

Source

Selects the source signal.

Source

CH1~2, Ref1~4

Function

Adds a mathematical function to the expression.

Function

Intg, Diff, log, Ln, Exp, Sqrt, Abs, Rad, Deg, Sin, Cos, Tan, Asin, Acos, Atan

Variable

Adds a user-specified variable to the expression.

Source

CH1~2, Ref1~4

Advanced Math Overview

MDO-2000A series User Manual

Operator

Adds an operator or parenthesis to the function expression.

Operator

+, -, *, /, (, ), !(, <, >, <=, >=, ==, !=, ||, &&

Figure

Adds a value to the expression.

Figure

Integers, floating point, or floating point with exponent values.

Measurement

Adds automatic measurements to the expression. Not all automatic measurements are supported.

Measurement

Pk-Pk, Max, Min, Amp, High, Low, Mean, CycleMean, RMS, CycleRMS, Area, CycleArea, ROVShoot, FOVShoot, Freq, Period, Rise, Fall, PosWidth, NegWidth, Dutycycle, FRR, FRF, FFR, FFF, LRR, LRF, LFR, LFF, Phase, RPRFShoot, FPREShoot, +Pulses, -Pulses, +Edges, -Edges

Panel Operation

1. Press the Math key.

MATH

2. Press Advanced Math from the

bottom menu.

3. Press Edit Expression.

4. The Edit f(x) screen appears. CH1 + CH2 is

shown in the expression box as an example at startup.

Advanced Math Operation

MEASUREMENT

5. Press Clear to clear the expression

entry area.

6. Use the Variable knob and the Select

key to create an expression.

Use the Variable knob to highlight a source, function, variable, operator, figure or measurement in orange.

Press the Select key to make the selection.

If a particular parameter is grayed out, it indicates that the particular parameter is not available at that time.

Select

VARIABLE

Back Space

7. To delete the last parameter press

Back Space.

8. When the expression is complete,

press OK Accept.

MDO-2000A series User Manual

Example: CH1 + CH2

Advanced Math

Source1

Source2

Set the VAR1 & VAR2

9. Press VAR1 or VAR2 to set

VAR1/VAR2 if they were used in the expression created previously.

10. Press Mantissa.

Use the Left and Right arrow keys to select a digit and use the variable knob to set the value of the selected digit.

11. Press Exponent.

Use the Variable knob to set the exponent of the variable.

12. Press Go Back to finish editing

VAR1 or VAR2.

Vertical Position and Scale

13. Press Unit/div and use the Variable

knob to set the vertical scale of the math waveform.

14. Press Position and use the Variable

knob to set the vertical position of the math waveform on the display.

MEASUREMENT

Clear Advanced Math

To clear the advanced math result from the display, press the Math key again.

MATH

MDO-2000A series User Manual

Acquisition ................................................................ 75

Select Acquisition Mode ........................................................................ 75

Show Waveform in XY Mode .............................................................. 76

Set the Record Length ........................................................................... 78

Segmented Memory Acquisition ................................ 80

Segments Display .................................................................................... 81

Set the Number of Segments ............................................................... 82

Run Segmented Memory ....................................................................... 83

Navigate Segmented Memory .............................................................. 85

Play Through Each Segment ................................................................ 85

Measurement on Segments ................................................................... 86

Segment Info ........................................................................................... 90

Display ....................................................................... 92

Display Waveform as Dots or Vectors ............................................... 92

Set the Level of Persistence .................................................................. 92

Set the Intensity Level ........................................................................... 93

Select Display Graticule ......................................................................... 94

Freeze the Waveform (Run/Stop) ....................................................... 95

Turn Off Menu ....................................................................................... 96

Horizontal View ......................................................... 97

Move Waveform Position Horizontally ............................................. 97

Select Horizontal Scale .......................................................................... 98

Select Waveform Update Mode ........................................................... 99

Zoom Waveform Horizontally .......................................................... 100

Play/Pause ............................................................................................. 102

Vertical View (Channel) ............................................ 105

Move Waveform Position Vertically ................................................. 105

Select Vertical Scale .............................................................................. 106

Select Coupling Mode .......................................................................... 106

Input Impedance .................................................................................. 107

Invert Waveform Vertically ................................................................ 107

ADVANCED

CONFIGURATION

ADVANCED CONFIGURATION

Limit Bandwidth ................................................................................... 108

Expand by Ground/Center ................................................................ 109

Select Probe Type ................................................................................. 110

Select Probe Attenuation Level ......................................................... 111

Set the Deskew ..................................................................................... 111

Bus Key Configuration ..............................................113

Bus Display ............................................................................................ 113

Serial Bus Overview ............................................................................. 114

UART Serial Bus Configuration ........................................................ 116

I2C Serial Bus Interface ....................................................................... 118

CAN Serial Bus Interface .................................................................... 119

LIN Serial Bus Interface ..................................................................... 120

Bus Encoding ........................................................................................ 122

Threshold configuration ...................................................................... 122

Serial Bus Event Tables ....................................................................... 123

Event Tables Format ........................................................................... 126

Adding a Label to a Bus ...................................................................... 127

Using Cursors with the Serial Bus ..................................................... 129

Trigger ......................................................................131

Trigger Type Overview ....................................................................... 131

Trigger: types and sources................................................................... 133

Trigger Parameter Overview .............................................................. 133

Setup Holdoff Level............................................................................. 140

Setup Trigger Mode ............................................................................. 141

Using the Edge Trigger ....................................................................... 141

Using Advanced Delay Trigger .......................................................... 143

Using Pulse Width Trigger .................................................................. 144

Using Video Trigger ............................................................................. 145

Pulse Runt trigger ................................................................................. 147

Using Rise and Fall Trigger ................................................................ 148

Using the Timeout Trigger ................................................................. 150

Using the Bus Trigger .......................................................................... 151

UART BUS Trigger Settings ................................................................. 152

I2C Bus Trigger Settings ......................................................................... 153

CAN Bus Trigger ..................................................................................... 157

LIN Bus Trigger ...................................................................................... 159

Search.......................................................................162

Configuring Search Events ................................................................. 162

Copying Search Event To/From Trigger Events .......................... 164

Search Event Navigation..................................................................... 164

Save Search Marks ................................................................................ 165

Setting/Clearing Single Search Events ............................................. 166

FFT Peak................................................................................................ 167

MDO-2000A series User Manual

System Settings and Miscellaneous Settings............ 171

Select Menu Language ......................................................................... 171

View System Information ................................................................... 171

Erase Memory ....................................................................................... 172

Set Date and Time ................................................................................ 173

Probe Compensation Frequency ....................................................... 173

QR Code Reader Function ................................................................. 174

ADVANCED CONFIGURATION

Background

The acquisition mode determines how the samples are used to reconstruct a waveform.

Sample

This is the default acquisition mode. Every sample from each acquisition is used.

Peak detect

Only the minimum and maximum value pairs for each acquisition interval (bucket) are used. This mode is useful for catching abnormal glitches in the signal.

Average

Multiple acquired data is averaged. This mode is useful for drawing a noise-free waveform. To select the average number, use the Variable knob.

Average number: 2, 4, 8, 16, 32, 64, 128, 256

Panel Operation

1. Press the Acquire key.

Acquire

2. To set the Acquisition mode, press

Mode on the bottom menu.

Acquisition

The Acquisition process samples the analog input signals and converts them into digital format for internal processing.

Select Acquisition Mode

MDO-2000A series User Manual

3. Select an acquisition mode from

the side menu.

4. If Average was chosen, set the

number of samples to be used for the average function.

Mode

Sample, Peak Detect, Average

Average sample

2, 4, 8, 16, 32, 64, 128, 256

Example

Sample

Peak Detect

Average (256 times)

Background

The XY mode maps the input of channel 1 to the input of channel 2.

Connection

1. Connect the signals to Channel 1

(X-axis) and Channel 2 (Y-axis)

CH2CH1

Show Waveform in XY Mode

ADVANCED CONFIGURATION

2. Make sure a channel pair is

active (CH1 & CH2). Press the Channel key if necessary. A channel is active if the channel key is lit.

CH1 CH1

CH2 CH2

Panel Operation

3. Press the Acquire menu key.

Acquire

4. Press XY from the bottom menu.

5. Choose Triggered XY from the side

menu.

X-Y mode is split into two windows. The top window shows the signals over the full time range. The bottom window shows XY mode.

MDO-2000A series User Manual

To move the XY waveform position, use the vertical position knob: Channel 1 knob moves the XY waveform horizontally and Channel 2 knob moves the XY waveform vertically.

POSITION

CH1

POSITION

CH2

The horizontal position knob and horizontal Scale knob can still be used under the XY mode.

Turn Off XY Mode

To turn off XY mode, choose OFF (YT) mode.

Cursors and XY Mode

Cursors can be used with XY mode. See the Cursor chapter for details.

Page 55

Background

The number of samples that can be stored is set by the record length. Record length is important in an oscilloscope as it allows longer waveforms to be recorded.

The maximum record length for the MDO-2000A SERIES depends on operating mode. The table below describes the record lengths that are available for each mode.

Limitations

Record Length

Normal

Zoom

FFT

FFT in Zoom Window

✓ ✗ ✓

✗

10k

✓ ✓ ✓

✓

Set the Record Length

ADVANCED CONFIGURATION

100k

✓ ✓ ✓

✓

✓ ✓ ✓

✓

10M

✓ ✓ ✗

✗

20M

✓ ✓ ✗

✗

Panel Operation

1. Press the Acquire key.

Acquire

2. Press the Record Length key on the

bottom menu and choose the record length.

Record length

1000, 10k, 100k, 1M, 10M, 20M points

Note

The sampling rate may also be changed when the record length is changed.

MDO-2000A series User Manual

Normal memory acquisition period Rearm time Next trigger

Segmented Memory Acquisition

The advanced segmented memory utility allows the scope memory to be divided into different segments. Each time the scope is triggered, it only acquires data for one segment of memory at a time. This allows you to optimize the scope memory to only perform signal acquisition during important signal events.

For example, for a signal with a number of pulses, normally the oscilloscope will acquire the signal until the acquisition memory of the scope is filled up and then it will re-arm the trigger and then capture again. This could result in a number of events not being captured or captured at a less-than-desired resolution (depending on the horizontal scale and sampling rate). However, the segmented memory function would effectively allow you to capture more of the signal than you would otherwise. The diagrams below illustrate this point.

Normal acquisition mode example:

ADVANCED CONFIGURATION

SegmentnSegment

n+1

Segment

n+2

Segment

n+3

Segment

n+4

Segment

n+5

Run/Stop Indicator

Progress Indicator

Segmented memory acquisition example:

As shown above, the memory is divided into segments to increase the number of events that can be effectively captured with the same

acquisition memory. Also notice that the scope doesn’t need to

rearm the trigger between each segment, this makes the segmented memory function especially useful for high speed signals. The time between each segment is also recorded so that accurate signal timing can also be measured.

The segmented memory function also supports automatic measurements for each segment or statistics for all the captured segments.

The advanced Segment Memory Utility is available for both analog and digital channels.

Segments Display

MDO-2000A series User Manual

Progress Indicator

Indicates the number of segments that have to been captured relative to the set number of segments.

Run/Stop Indicator

Stop: The segments have finished acquiring or have been stopped.

Run: The scope is ready to acquire segments.

Note

Before the Segment function can be used, set the trigger settings as appropriate for the signal you wish to use. The number of segments that can be used depends wholly on the record length. See page 78 to set the record length.

Record length

Number of segments

1000 pt.

1 ~ 29000

10k pt.

1 ~ 2900

100k pt.

1 ~ 290

1M pt.

1 ~ 20

Panel Operation

1. Press the Acquire key.

Acquire

2. Press Segments on the bottom

menu.

3. Press Select Segments and set the

number of segments from the side menu.

Num of Seg

1~29000 (record length dependant)

Set to Maximum

Sets to the maximum number

Set the Number of Segments

ADVANCED CONFIGURATION

Set to Minimum

Sets to 1 segment

Note

The Select Segments icon is only available when Segments = OFF or when Segments is in the STOP mode (see the section below).

Background

Before the Segmented Memory function can be used, set the trigger settings as appropriate for the signal you wish to use. See page 131 for configuring the trigger settings.

Run Segments

1. Toggle Segments On from the bottom menu.



Note

The first time Segmented memory is turned on the segments will automatically be run. Each segment will be automatically captured.

2. The scope will automatically start acquiring

segments. The progress of the segmented memory capture is shown in the Progress Indicator.

3. The Run Indicator will be shown when in the

Run mode and the Segments icon will also indicate that the function is in run mode.

Run Indicator

Progress Indicator

Segment (Run )icon

Run Segmented Memory

MDO-2000A series User Manual

4. When the scope has finished acquiring

segments, press Segments Run to toggle the mode to the Segments Stop mode.



Alternatively, the Run/Stop key can be pressed.

Run/Stop

5. The Stop Indicator will be shown when in the

Stop mode.

Stop Indicator

Progress Indicator

Segment (Stop )icon

The scope is now ready to navigate or analyze the acquired segments.

Rerun Segmented Acquisition

6. To rerun the segments, press the Segments Stop

key to toggle the mode back to the Segments Run mode.



Alternatively, press the Run/Stop key again.

Run/Stop

7. Repeat steps 3 and 4 in the section above when

the segmented acquisition has completed.

ADVANCED CONFIGURATION

Background

After the segmented memory acquisitions have been captured you can navigate through each segment one at a time.

Operation

1. Press Select Segments from the

bottom menu. This key will be available in the Stop mode.

2. To navigate to the segment of

interest, press Current Seg from the side menu and use the Variable knob to scroll to the segment of interest.

Alternatively, the Set to Minimum and Set to Maximum keys can be used to jump to the first and last segment respectively.

3. The position in time of the selected

segment relative to the time of the first segment is shown in the Segments Time key.

Background

When all the segments have been acquired, the play/pause key can be used to play back through each segment.

Operation

1. Make sure the scope is in Segments Stop mode.

See page 83 for details.

Navigate Segmented Memory

Play Through Each Segment

MDO-2000A series User Manual

2. Press the Play/Pause key to run

through the acquired segments in numerical order.

 Press the Play/Pause key again

to pause the playback.

 When the scope has played

through to the last segment, pressing the Play/Pause key again will play through each segment again in reverse order.

Background

The Segmented memory function can be used in conjunction with the automatic measurements configured in the Measurement menu (see page

41).

Please note that Digital channels measurements cannot be used in conjunction with the segmented memory.

Modes

Segments Measure

This function will either perform statistics calculations on the segments or tabulate a list of the measurement results for all the segments.

Segments Info

Provides configuration information common for all the acquired memory segments.

Segments Measure

The Segments Measure function allows you to view automatic measurements for the segments in statistical bins or as a list displaying the result of each automatic measurement.

Measurement on Segments

ADVANCED CONFIGURATION

Statistics

This function will bin the measurement results of a single automatic measurement into a user-defined number of bins. This allows you to easily view statistics for a large number of segments. For example, the statistics function will display the number of results for each bin and the measurement range of each bin for the selected automatic measurement.

Measurement List

Puts all the measurement results for a segment in a list. All the currently selected automatic measurement results are listed. A maximum of 8 automatic measurements can be used with this function.

Note

To use automatic measurements with the segmented memory, automatic measurements must first be selected from the Measure menu before the segmented memory function is run. Note that Digital channels cannot use this function.

Setup

Press the Measure key and select any single source measurement from the Add Measurement menu.

See page 45 for details on how to add automatic measurements.

Measure

MDO-2000A series User Manual

Operation

1. Press Analyze Segments from the

Segments menu.

Note: This key will only be available in the Stop mode.

2. Press Segments Measure.

3. Select either the

statistics or the measurement list from the side menu.

Statistics

List

4. The statics table or measurement list appears on

the display.

Note that the more segments that you have, the longer it will take to calculate the statics or list the measurement results.

5. For statistic measurements,

press Plot Source to choose which automatic measurement to use for the statistics calculations. The statistics for only one automatic measurement can be viewed at a time.

6. For the measurement list, press

Source and select the source channel for measurement.

Range

CH1 ~ CH2

ADVANCED CONFIGURATION

Statistics Results

This function will bin the measurement results of the selected automatic measurement into a userdefined number of bins.

Setup

7. To select the number of bins for the

statistics, press Divided by and select the number of bins with the Variable knob.

Range

1~20 bins

8. Press Select and use the Variable

knob to view the measurement results for each bin.

MDO-2000A series User Manual

Example: Statistics

Statistics of currently

selected bin

Cursor/selected bin

Bin count

Measurement List

Puts all the measurement results for a segment in a list.

Setup

9. Press Select and use the variable

knob to scroll through each segment.

Example: Measurement List

Select cursor

Measurement results

Measurement types

Operation

1. Press Analyze Segments from the

bottom menu.

Note: This key will only be available in the Stop mode.

Segment Info

ADVANCED CONFIGURATION

2. Press Segments Info.

3. A table showing all general setting information

for the segmented memory acquisitions is shown on the display.

Info:

Sample rate, Record length, Horizontal, Vertical

MDO-2000A series User Manual

Background

When the waveform is displayed on the screen, it can be displayed as dots or vectors.

Panel Operation

1. Press the Display menu key.

Display

2. Press Dot / Vector to toggle between

Dot and Vector mode.

Range

Dots

Only the sampled dots are displayed.

Vectors

Both the sampled dots and the connecting line are displayed.

Example:

Vectors

Dots

Background

The persistence function allows the MDO-2000A SERIES to mimic the trace of a traditional analog oscilloscope. A waveform trace can be configured

to “persist” for a designated amount of time.

Panel Operation

1. Press the Display menu key.

Display

The Display menu defines how the waveforms and parameters appear on the main LCD display.

Display Waveform as Dots or Vectors

Set the Level of Persistence

ADVANCED CONFIGURATION

2. To set the persistence time, press

the Persistence menu button on the bottom bezel.

3. Use the Variable knob to select a

persistence time.

Time

16ms, 30ms, 60ms, 120ms, 240ms,

0.5s, 1s, 2s,~4s, Infinite, Off

Clear

To clear persistence, press Clear Persistence.

Background

The intensity level of a signal can also be set to mimic the intensity of an analog oscilloscope by setting the digital intensity level.

Panel Operation

1. Press the Display menu key.

Display

2. Press Intensity from the bottom

menu.

Waveform Intensity

3. To set the waveform intensity, press Waveform

Intensity and edit the intensity.

Range

0~100%

Example

Waveform Intensity 50%

Waveform Intensity 100%

Set the Intensity Level

MDO-2000A series User Manual

Graticule Intensity

4. To set the graticule intensity, press Graticule

Intensity from the side menu and edit the

intensity value.

Range

10~100%

Example

Graticule Intensity 100%

Graticule Intensity 10%

Backlight Intensity

5. To set the LCD backlight intensity, press

Backlight Intensity from the side menu and edit the intensity value.

Range

2~100%

Backlight AutoDim

6. To automatically dim the backlight after a set

duration, set Backlight Auto-Dim to On and then set Time to the appropriate time.

After the set amount of time with no panel activity, the screen will dim until a panel key is pressed again. This function will prolong the life of the LCD display.

Range

1~180 min

Panel Operation

1. Press the Display menu key.

Display

2. Press Graticule from the bottom

menu.

Select Display Graticule

ADVANCED CONFIGURATION

3. From the side menu choose the

graticule display type.

Full

: Shows the full grid; X and Y axis

for each division.

Grid

: Show the full grid without the X

and Y axis.

Cross Hair

: Shows only the center X

and Y frame.

Frame

: Shows only the outer frame.

Panel Operation

1. Press the Run/Stop key. The

Run/Stop key turns red and

waveform acquisition is paused.

Run/Stop Run/Stop

2. The waveform and the trigger

freezes. The trigger indicator on the top right of the display shows Stop.

3. To unfreeze the waveform,

press the Run/Stop key again. The Run/Stop key turns green again and acquisition resumes.

Run/Stop Run/Stop

Freeze the Waveform (Run/Stop)

For more details about Run/Stop mode, see page 37.

Turn Off Menu

Panel Operation

1. Press the Menu Off key

below the side menu keys to reduce a menu. The menu key needs to be pressed each time to reduce one menu.

See page 26 for more information.

VARIABLE

POSITION

HORIZONTAL

POSITION

VERTICAL

MATH

REF

BUS

SCALE

TRIGGER

LEVEL

PUSH TO

ZERO

SCALESCALESCALE

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

PUSH TO

ZERO

SCALE

Measure

Display

Cursor

Help

Test

Save/Recall

Acquire

Utility

Autoset

Run/Stop

Single

Default

Select

Set/Clear

Zoom

CH1 CH2 CH3 CH4

50 %

MDO-2000A series User Manual

ADVANCED CONFIGURATION

Panel Operation

The horizontal position knob moves the waveform left/right.

POSITION

PUSH TO

ZERO

As the waveform moves, a position indicator on the top of the display indicates the horizontal position of the waveform in memory.

Reset Horizontal Position

1. To reset the horizontal position,

press the Acquire key and then press Reset H Position to 0s from the bottom menu.

Alternatively, pushing the horizontal position knob will also reset the position to zero.

Acquire

POSITION

PUSH TO

ZERO

Run Mode

In Run mode, the memory bar keeps its relative position in the memory since the entire memory is continuously captured and updated.

Horizontal View

This section describes how to set the horizontal scale, position, and waveform display mode.

Move Waveform Position Horizontally

MDO-2000A series User Manual

Select Horizontal Scale

To select the timebase (time/div), turn the horizontal Scale knob; left (slow) or right (fast).

SCALE

Range

1ns/div ~ 100s/div, 1-2-5 increment

The timebase indicator updates as the horizontal scale is adjusted.

Horizontal

position

Timebase

Run Mode

In Run mode, the memory bar and waveform size keep their proportion. When the timebase becomes slower, roll mode is activated (if the trigger is set to Auto).

Stop Mode

In Stop mode, the waveform size changes according to the scale.

Select Horizontal Scale

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Specifications and Main Features

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User Manual