YOKOGAWA DL1720E, DL1740E, DL1740EL, DL1735E User Manual

IM 701730-01E

3rd Edition

Digital Oscilloscope

DL1700E

Series

Product Registration

Thank you for purchasing YOKOGAWA products.

YOKOGAWA provides registered users with a variety of information and
services.
Please allow us to serve you best by completing the product registration
form accessible from our homepage.

http://tmi.yokogawa.com/

PIM 103-03E

Foreword

Notes

Thank you for purchasing the DL1700E Series (DL1720E, DL1735E, DL1740E, or
DL1740EL) Digital Oscilloscope. This user’s manual contains useful information about
the functions and operating procedures of the DL1700E, and lists the handling
precautions. To ensure proper use of the instrument, please read this manual
thoroughly before beginning operation. Keep this manual in a safe place for quick
reference in the event a question arises. The following manuals are provided for the
DL1700E Series.

Manual Title Manual No. Description

DL1700E Series IM701730-01E This manual. Explains all functions and
User’s Manual procedures of the DL1700E excluding the

communication functions.

DL1700E Series IM701730-02E Provides a brief explanation of the functions
Operation Guide and basic operating procedures of the

DL1700E.

DL1700E Series IM701730-17E Describes the communication functions of
Communication Interface the communication interface.
User’s Manual (CD-ROM)

DL1700E Series IM701730-51E Explains the operating procedures of the
Serial Bus Signal Analysis Function optional serial bus signal analysis function.
User’s Manual

• The contents of this manual are subject to change without prior notice as a result of
continuing improvements to the instrument’s performance and functions. The figures
given in this manual may differ from those that actually appear on your screen.

• Every effort has been made in the preparation of this manual to ensure the accuracy
of its contents. However, should you have any questions or find any errors, please
contact your nearest YOKOGAWA dealer.

• Copying or reproducing all or any part of the contents of this manual without the
permission of Yokogawa Electric Corporation is strictly prohibited.

• The TCP/IP software of this product and the document concerning the TCP/IP
software have been developed/created by YOKOGAWA based on the BSD
Networking Software, Release 1 that has been licensed from California University.

Trademarks

• Microsoft, Internet Explorer, MS-DOS, Windows, and Windows NT are either
registered trademarks or trademarks of Microsoft Corporation in the United States
and/or other countries.

• Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated.

• UNIX is either a registered trademark or trademark of The Open Group in the United
States and/or other countries.

• For purposes of this manual, the TM and ® symbols do not accompany their
respective trademark names or registered trademark names.

• Other company and product names are trademarks or registered trademarks of their
respective companies.

Revisions

• 1st Edition: July 2004

• 2nd Edition: July 2007

• 3rd Edition: April 2009

3rd Edition: April 2009 (YK)
All Rights Reserved, Copyright © 2004 Yokogawa Electric Corporation

IM 701730-01E

i

Checking the Contents of the Package

Unpack the box and check the contents before operating the instrument. If some of the
contents are not correct, or if any items are missing or damaged, contact the dealer from
which you purchased them.

DL1700E Main Unit

Check that the model name and suffix code given on the name plate on the rear panel of
the instrument matches the ones you ordered. Also note the instrument number (NO.),
and be prepared to give this number to your Yokogawa representative when contacting
them for repairs and other issues.

MODEL
SUFFIX

NO.

Made in Japan

MODEL
SUFFIX

NO.

Made in Japan

Model Suffix Specifications

701715 (DL1720E) 2-channel, 1 MW memory model
701725 (DL1735E) 4-channel, 2 MW memory model
701730 (DL1740E) 4-channel, 2 MW memory model
701740 (DL1740EL) 4-channel, 8 MW memory model

Power cord -D UL/CSA Standard power cord (Part No.: A1006WD)

[Maximum rated voltage: 125 V; Maximum rated current: 7 A]

-F VDE Standard Power Cord (Part No.: A1009WD) [Maximum
rated voltage: 250 V; Maximum rated current: 10 A]

-Q BS Standard Power Cord (Part No.: A1054WD) [Maximum
rated voltage: 250 V; Maximum rated current: 10 A]

-R AS Standard Power Cord (Part No.: A1024WD) [Maximum
rated voltage: 250 V; Maximum rated current: 10 A]

-H GB Standard Power Cord (complies with the CCC)(Part No.:
A1064WD) [Maximum rated voltage: 250 V, Maximum rated
current: 10 A]

Built-in media drive -J1 Floppy disk drive

-J3 PC card interface

Option specifications /B5 Built-in printer

1

1

2

(Optional) /EX2 2 additional 701941 miniature passive probes in place of

700988 passive probes (for the DL1720E)

/EX4 4 additional 701941 miniature passive probes in place of

700988 passive probes (for the DL1735E/DL1740E/
DL1740EL)

/C10 Ethernet interface
/P2 Probe power, 2 outputs (for the DL1720E)
/P4 Probe power, 4 outputs (for the DL1735E/DL1740E/DL1740EL)
/F5 I2C + SPI Bus Signal Analysis Function

1. Select floppy disk drive or PC card interface for the built-in media drive.

2. One roll paper (B9850NX) is included.

NO. (Instrument Number)

When contacting the dealer from which you purchased the instrument, please give them
the instrument number.

ii

IM 701730-01E

Accessories

Checking the Contents of the Package

The standard accessories below are supplied with the instrument. Check that no
accessories are missing or damaged.

Power Cord (one of the following power cords

is supplied according to the instrument’s suffix codes)

UL/CSA Standard
A1006WD

VDE Standard
A1009WD

D F Q R

Printer roll

2

paper
B9850NX

Power fuse
A1352EF

Rubber feet
1 sheet (4 pcs.)
B9989EX

User’s Manual (this document)
Operation Guide
Serial Bus Signal Analysis
Function User’s Manual

3

BS Standard
A1054WD

AS Standard
A1024WD

Probe case
B9918EZ

1

Communication Interface

1

User’s Manual
B8052YZ

1

Front panel protection cover
(transparent)
B9989FA

GB Standard
A1064WD

H

400 MHz passive

1

probe
700988

500 MHz miniature
passive probe

1

701941

1. The DL1720E comes with two, and the DL1735E/DL1740E/DL1740EL comes with four. On models with the /EX2
or the /EX4 option, 701941 passive probes are provided in place of 70988 passive probes.

2. Provided on models with the /B5 option (built-in printer).

3. Provided on models with the /F5 option (serial bus signal analysis function).

Optional Accessories (Sold Separately)

The optional accessories below are available for purchase separately. Check that no
accessories are missing or damaged. For inquiries regarding accessories, please
contact the dealer from which you purchased the instrument.

FET probe
700939

Differential probe
700925

Current probe
701932/701933

100:1 probe
700978

Probe power cable
(for 700924 and 700925)
B9852MJ

Current probe
701930/701931

Miniature passive probe
701941

Differential probe
701920

GO/NO-GO cable
366973

Differential probe
700924/701921*

Differential probe
701922

* The 701921 comes with
a probe power cable
(model B9852MJ)

IM 701730-01E

iii

Checking the Contents of the Package

Spare Parts (Sold Separately)

The spare parts below are available for purchase separately. Check that no accessories
are missing or damaged.
For inquiries regarding spare parts, please contact the dealer from which you purchased
the instrument.

NamePart No. Lot Qty. Notes

Roll paper for printer B9850NX 5 Thermalsensible paper, total length

400 MHz passive probe 700988 1 Input resistance of 10 MΩ and

Front panel protection cover B9989FA 1
(transparent)

of 30 m

overall length of 1.5 m

iv

IM 701730-01E

Safety Precautions

This is an IEC safety class I instrument (with protective grounding).
The following general safety precautions must be taken during all phases of operation,
service, and repair of this instrument. If this instrument is used in a manner not specified
in this manual, the protective features provided by the instrument may be impaired. Also,
Yokogawa Electric Corporation assumes no liability for the customer’s failure to comply
with these requirements.

The following symbols are used on this instrument.

Danger. Refer to the user’s manual.

locations on the instrument which require special instructions for proper
handling or use. The same symbol appears in the corresponding place in the
manual to identify those instructions.

Functional ground terminal (not to be used as a protective ground terminal).

Alternating current.

Direct current

ON (power)

OFF (power)

ON (power)

OFF (power)

This symbol appears on dangerous

IM 701730-01E

v

Symbols Used on This Instrument

Make sure to comply with the precautions below. Not complying might result in injury
or death.

WARNING

• Use the Correct Power Supply

Before connecting the power cord, ensure that the source voltage matches the
rated supply voltage of the instrument and that it is within the maximum rated
voltage of the provided power cord.

• Use the Correct Power Cord and Plug

To prevent the possibility of electric shock or fire, be sure to use the power cord
supplied by YOKOGAWA. The main power plug must be plugged into an outlet
with a protective earth terminal. Do not disable this protection by using an
extension cord without protective earth grounding.

• Connect the Protective Grounding Terminal

Make sure to connect the protective earth to prevent electric shock before
turning ON the power. The power cord that comes with the instrument is a
three-prong type power cord. Connect the power cord to a properly grounded
three-prong outlet.

• Do Not Impair the Protective Grounding

Never cut off the internal or external protective earth wire or disconnect the
wiring of the protective earth terminal. Doing so poses a potential shock hazard.

• Do Not Operate with Defective Protective Grounding or Fuse

Do not operate the instrument if the protective earth or fuse might be defective.
Make sure to check them before operation.

• Fuse

To prevent a fire, make sure to use fuses with the specified standard (voltage,
current, type). Before replacing the fuses, turn off the power and disconnect the
power source. Do not use a different fuse or short -circuit the fuse holder.

• Do Not Operate in an Explosive Atmosphere

Do not operate the instrument in the presence of flammable liquids or vapors.
Operation in such environments constitutes a safety hazard.

• Do Not Remove Covers

The covers should be removed by YOKOGAWA’s qualified personnel only.
Opening the cover is dangerous, because some areas inside the instrument
have high voltages.

• Ground the Instrument before Making External Connections

Securely connect the protective grounding before connecting to the item under
measurement or an external control unit. If you are going to touch the circuit,
make sure to turn OFF the circuit and check that no voltage is present.
To prevent the possibility of electric shock or an accident, connect the ground of
the probe and input connector to the ground of the item being measured.

See below for operating environmental limitations.

This product is a Class A (for industrial environments) product. Operation of this
product in a residential area may cause radio interference in which case the
user will be required to correct the interference.

vi

CAUTION

IM 701730-01E

Waste Electrical and Electronic Equipment

Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC

(This directive is only valid in the EU.)
This product complies with the WEEE Directive (2002/96/EC) marking
requirement. This marking indicates that you must not discard this electrical/
electronic product in domestic household waste.

Product Category
With reference to the equipment types in the WEEE directive Annex 1, this
product is classified as a ?Monitoring and Control instrumentation? product.

Do not dispose in domestic household waste. When disposing products in the
EU, contact your local Yokogawa Europe B. V. office.

IM 701730-01E

vii

Conventions Used in This Manual

Safety Markings

The following markings are used in this manual.

Improper handling or use can lead to injury to the user or damage
to the instrument.

indicate that the user must refer to the user’s manual for special
instructions. The same symbol appears in the corresponding place
in the user’s manual to identify those instructions. In the manual,
the symbol is used in conjunction with the word “WARNING” or
“CAUTION.”

This symbol appears on the instrument to

WARNING

Caution

Note

Notations Used on Pages Describing Operating Procedure

On pages that describe the operating procedures in Chapter 3 through 16, the following
notations are used to distinguish the procedures from their explanations.

Procedure

Explanation

Notations Used in the Procedure

Panel Keys and Soft keys

Bold characters used in the procedural explanations indicate characters that are marked on the
panel keys or the characters of the soft keys displayed on the screen menu.

SHIFT+Panel Key

SHIFT+key means you will press the SHIFT key (causing the green indicator to the left of the
SHIFT key to illuminate), and then press a panel key. The setup menu marked in purple above
or below the panel key that you pressed appears on the screen.

Jog Shuttle & SELECT

Jog shuttle & SELECT indicates selecting or setting parameters and entering values using the jog
shuttle, the SELECT key, and other keys. For details on the procedure, see section 4.1 or 4.2.

Describes precautions that should be observed to prevent serious
injury or death to the user.

Describes precautions that should be observed to prevent minor or
moderate injury, or damage to the instrument.

Provides important information for the proper operation of the
instrument.

Carry out steps in the order shown. The operating procedures are
given with the assumption that you are not familiar with the
operation. Thus, it may not be necessary to carry out all the steps
when changing settings.

Describes settings and restrictions relating to the operation. A
detailed description of the function is not provided. For a detailed
description of the function, refer to Chapter 2.

viii

Unit

k Denotes “1000.” Example: 100 kS/s
K Denotes “1024.” Example: 459 KB (file data size)

IM 701730-01E

Flow of Operation

Making Preparations for Measurements

Displaying Waveforms on the Screen

Waveform Display Conditions

Computing, Analyzing, and Searching Waveforms

Printing and Saving Waveforms

The figure below is provided to familiarize the first-time user with the general flow of the
instrument operation. For a description of each item, see the relevant section or chapter.

Making Preparations for Measurements

Instrument installation

Power connection (ON/OFF)

Probe connection

Displaying Waveforms on the Screen

Initialization

Auto setup

Waveform Display Conditions

• Vertical axis

• Horizontal (time) axis

• Trigger

• Waveform acquisition

• Waveform and information display

Section 3.2

Section 3.3

Section 3.4, 3.5

Section 4.4

Section 4.5

Sections 5.1 to 5.9
Sections 5.10 to 5.11
Chapter 6
Chapter 7
Chapter 8

Computing, Analyzing, and Searching Waveforms

• Waveform computation

• Waveform analysis

• Waveform search

• GO/NO-GO determination

Printing and Saving Waveforms

• Screen image printing

• Saving of various types of data

IM 701730-01E

Chapter 9
Sections 10.5 to 10.8
Sections 10.2 to 10.4
Sections 10.9 to 10.11

Chapter 11
Chapter 12

ix

Contents

Contents

Checking the Contents of the Package ......................................................................................... ii

Checking the Contents of the Package ......................................................................................... ii

Safety Precautions ....................................................................................................................... v

Waste Electrical and Electronic Equipment ................................................................................ vii

Conventions Used in This Manual ............................................................................................. viii

Flow of Operation .........................................................................................................................ix

Chapter 1 Names and Functions of Parts

1.1 Front Panel, Rear Panel, and Top Panel ....................................................................... 1-1

1.2 Panel Keys and Knobs .................................................................................................. 1-4

1.3 Display Screens ............................................................................................................. 1-8

Chapter 2 Explanation of Functions

2.1 System Configuration and Block Diagram ..................................................................... 2-1

2.2 Vertical and Horizontal Axis ........................................................................................... 2-3

Vertical Sensitivity (V/div), Vertical Position of the Waveform, Input Coupling,
Probe Attenuation/Current-to-Voltage Conversion Ratio, Offset Voltage,
Bandwidth Limit, Linear Scaling, Horizontal Axis (Time Axis)

2.3 Triggers .......................................................................................................................... 2-8

Trigger Source, Trigger Slope, and Trigger Level, Trigger Type, Trigger Mode, Trigger Position,
Trigger Delay, Trigger Coupling, HF Rejection, Trigger Gate, Trigger Hysteresis,
Trigger Hold Off, Action-on-Trigger

2.4 Waveform Acquisition and Display Conditions ............................................................ 2-14

Record Length, Interleave Mode, Sampling Mode, Acquisition Mode, Sequential Store,
History Memory, Display Format, Display Interpolation, Accumulated Display,
Zooming the Waveform, X-Y Waveform Display, Snapshot, Clear Trace,
Other Waveform Display Settings

2.5 Waveform Computation ............................................................................................... 2-21

Addition, Subtraction, and Multiplication, Binary Computation, Inversion,
Differentiation (Diff) and Integration (Integ), Phase Shift, Scaling the Computed Waveform,
Power Spectrum Display

2.6 Analyzing, and Searching Waveforms ......................................................................... 2-23

Displaying History Waveforms, History Search, Search and Zoom, Cursor Measurements,
Automated Measurement of Waveform Parameters, GO/NO-GO Determination

2.7 Communication ............................................................................................................ 2-30

Communication Using Commands (GP-IB, USB, or Ethernet),
Saving and Loading Data from a Network Drive (FTP Client),
Printing on a Network Printer (LPR Client), Transmitting E-Mails (SMTP Client),
Accessing the instrument from a PC or Workstation (FTP Server), Web Server,
Using the Instrument as a Network Drive

2.8 Other Useful Functions ................................................................................................ 2-32

Entering Values and Text Using the USB Keyboard,
Operating the Instrument Using a USB Mouse, Initialization, Auto Setup, Preset,
Printing Screen Images, Saving and Loading Data from the Storage Medium,
Operating the instrument Using a Free Software Program

Chapter 3 Making Preparations for Measurements

3.1 Handling Precautions ..................................................................................................... 3-1

3.2 Installing the Instrument ................................................................................................. 3-3

3.3 Connecting the Power Supply and Turning the Power Switch ON and OFF ................. 3-5

3.4 Connecting the Probe .................................................................................................... 3-8

3.5 Compensating the Probe (Phase Correction) .............................................................. 3-11

x

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Contents

3.6 Setting the Date and Time ........................................................................................... 3-13

1

Chapter 4 Common Operations

4.1 Operations and Functions of Keys and the Jog Shuttle ................................................. 4-1

4.2 Entering Values and Strings .......................................................................................... 4-3

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse .............................. 4-6

4.4 Initializing Settings ....................................................................................................... 4-13

4.5 Executing Auto Setup .................................................................................................. 4-15

4.6 Performing Calibration ................................................................................................. 4-18

4.7 Correcting the Delay Time of the Input Signals ........................................................... 4-20

4.8 Using the Help Function .............................................................................................. 4-22

Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON and OFF ..................................................................................... 5-1

5.2 Setting V/div ................................................................................................................... 5-2

5.3 Setting the Vertical Position of the Waveform................................................................ 5-4

5.4 Setting the Input Coupling ............................................................................................. 5-6

5.5 Selecting the Probe Attenuation/Current-to-Voltage Conversion Ratio ......................... 5-8

5.6 Setting the Offset Voltage .............................................................................................. 5-9

5.7 Using the Preset Function ........................................................................................... 5-11

5.8 Setting the Bandwidth Limit ......................................................................................... 5-14

5.9 Using the Linear Scaling Function ............................................................................... 5-15

5.10 Selecting the Time Base .............................................................................................. 5-17

5.11 Setting T/div ................................................................................................................. 5-19

2

3

4

5

6

7

8

9

Chapter 6 Triggers

6.1 Selecting the Trigger Mode ............................................................................................ 6-1

6.2 Setting the Trigger Position............................................................................................ 6-3

6.3 Setting the Trigger Delay ............................................................................................... 6-5

6.4 Setting the Hold Off Time............................................................................................... 6-6

6.5 Setting the Edge Trigger (SIMPLE) ............................................................................... 6-8

6.6 Setting the External Trigger (SIMPLE)......................................................................... 6-11

6.7 Activating Triggers on the Commercial Power Supply (SIMPLE) ................................ 6-13

6.8 Setting the A->B(N) Trigger (ENHANCED) .................................................................. 6-14

6.9 Setting the A Delay B Trigger (ENHANCED) ............................................................... 6-17

6.10 Setting the Pattern Trigger (ENHANCED) ................................................................... 6-20

6.11 Activating a Width (Pulse<T, Pulse>T, T1<PLS<T2, and Time Out) Trigger

(ENHANCED) .............................................................................................................. 6-24

6.12 Setting the OR Trigger (ENHANCED) ......................................................................... 6-28

6.13 Setting a Window Trigger (ENHANCED) ..................................................................... 6-31

6.14 Setting the TV Trigger (ENHANCED) .......................................................................... 6-34

6.15 Setting the Action-on-Trigger ....................................................................................... 6-38

6.16 Setting the Trigger Gate............................................................................................... 6-40

Chapter 7 Waveform Acquisition

7.1 Starting/Stopping Waveform Acquisition ........................................................................ 7-1

7.2 Setting the Record Length ............................................................................................. 7-2

7.3 Using Interleave Mode ................................................................................................... 7-3

7.4 Turning Repetitive Sampling Mode ON and OFF .......................................................... 7-4

7.5 Setting the Acquisition Mode ......................................................................................... 7-5

7.6 Performing Sequential Store (SINGLE(N) Mode) .......................................................... 7-8

10

11

12

13

14

15

16

17

App

IM 701730-01E

xi

Index

Contents

Chapter 8 Waveform Display and Information Display

8.1 Changing the Display Format ........................................................................................ 8-1

8.2 Setting the Display Interpolation Method ....................................................................... 8-3

8.3 Accumulating Waveforms .............................................................................................. 8-5

8.4 Zooming the Waveform ................................................................................................. 8-7

8.5 Displaying the X-Y Waveform ...................................................................................... 8-10

8.6 Taking Snapshots and Clearing Traces ....................................................................... 8-13

8.7 Changing the Graticule (Scale) .................................................................................... 8-14

8.8 Turning the Scale Display ON and OFF ...................................................................... 8-15

8.9 Setting Waveform Labels ............................................................................................. 8-16

8.10 Turning the Translucent Display ON and OFF ............................................................. 8-18

Chapter 9 Waveform Computation

9.1 Displaying and Labeling Computed Waveforms ............................................................ 9-1

9.2 Adding, Subtracting, and Multiplying Waveforms .......................................................... 9-3

9.3 Performing Binary Computation ..................................................................................... 9-6

9.4 Inverting Waveforms ...................................................................................................... 9-8

9.5 Differentiating and Integrating Waveforms................................................................... 9-10

9.6 Performing Power Spectrum Computation (FFT) ........................................................ 9-12

9.7 Smoothing Waveforms ................................................................................................ 9-14

9.8 Shifting the Phase ........................................................................................................ 9-16

Chapter 10 Analyzing and Searching Waveforms

10.1 Displaying History Waveforms ..................................................................................... 10-1

10.2 Searching the History Waveforms Using Zones (History Search) ............................... 10-5

10.3 Searching the History Waveforms Using Automatic Measurement of Parameters

(History Search) ........................................................................................................... 10-9

10.4 Searching Waveforms Using the Search and Zoom Function ................................... 10-14

10.5 Cursor Measurements ............................................................................................... 10-31

10.6 Automated Measurement of Waveform Parameters ................................................. 10-41

10.7 Statistical Processing of the Automated Measurement Values of Waveform

Parameters ................................................................................................................ 10-48

10.8 Performing Automated Measurements of Waveform Parameters on Dual Areas...... 10-55

10.9 Performing GO/NO-GO Determination Using Zones ................................................. 10-60

10.10 Performing GO/NO-GO Determination Using Automated Measurement of Waveform

Parameters ................................................................................................................ 10-66

10.11 Using the GO/NO-GO Determination Signal Output Function................................... 10-70

Chapter 11 Printing Screen Images

11.1 Installing the Roll Paper into the Built-in Printer (Optional) .......................................... 11-1

11.2 Printing Using the Built-in Printer (Optional) ................................................................ 11-3

11.3 Printing Using a USB Printer ....................................................................................... 11-6

11.4 Printing Using a Network Printer (Optional) ............................................................... 11-10

Chapter 12 Saving and Loading Data

12.1 Storing and Recalling Setup Data................................................................................ 12-1

12.2 Floppy Disks and PC Cards......................................................................................... 12-3

12.3 Connecting USB Storage (MO Disk Drive, Hard Disk, Flash Memory) to the USB

PERIPHERAL Interface ............................................................................................... 12-6

12.4 Formatting the Storage Medium .................................................................................. 12-8

12.5 Saving/Loading the Waveform Data .......................................................................... 12-12

12.6 Saving/Loading Settings ............................................................................................ 12-20

xii

IM 701730-01E

12.7 Saving/Loading the Snapshot Waveforms................................................................. 12-26

12.8 Saving Automated Measurement Values of Waveform Parameters .......................... 12-30

12.9 Saving Screen Image Data ........................................................................................ 12-33

12.10 Thumbnails of the Saved Screen Image Data can be Displayed .............................. 12-37

12.11 Changing the File Attributes and Deleting Files......................................................... 12-42

12.12 Copying Files ............................................................................................................. 12-46

12.13 Changing the Directory or File Name of the Storage Medium and Creating

Directories.................................................................................................................. 12-50

Chapter 13 Ethernet Communications (Optional)

13.1 Connecting the Instrument to the Network .................................................................. 13-1

13.2 Setting Up the TCP/IP ................................................................................................. 13-3

13.3 Saving and Loading Waveform Data, Setup Data, and Image Data on a Network Drive

(FTP Client Function)................................................................................................... 13-8

13.4 Entering Settings for Printing Screen Images on the Network Printer (LPR Client

Function) .................................................................................................................... 13-11

13.5 Sending Periodic or Action Mail (SMTP Client Function)........................................... 13-13

13.6 Accessing the Instrument from a PC or Workstation (FTP Server Function) ............ 13-18

13.7 Using the Web Server Function ................................................................................. 13-20

13.8 Setting the Time Difference from GMT (Greenwich Mean Time) ............................... 13-45

13.9 Checking the Presence of the Ethernet Interface (Optional) and the MAC Address . 13-47

13.10 Setting the FTP Passive Mode and LPR/SMTP Timeout .......................................... 13-49

13.11 Using the Instrument as a Network Drive .................................................................. 13-51

Chapter 14 Rear Panel Auxiliary I/O Section

14.1 External Trigger Input, External Clock Input, and Trigger Gate Input .......................... 14-1

14.2 Trigger Output (TRIG OUT) ......................................................................................... 14-4

14.3 Video Signal Output (VIDEO OUT (VGA))................................................................... 14-6

Contents

1

2

3

4

5

6

7

8

9

10

Chapter 15 Other Operations

15.1 Changing the Message and Menu Language and Turning the

Click Sound ON and OFF ............................................................................................ 15-1

15.2 Changing the USB Keyboard Language and Checking the

Connected USB Keyboard........................................................................................... 15-3

15.3 Measuring the Offset Voltage and Applying the Offset Voltage to the

Computed Results ....................................................................................................... 15-5

15.4 Setting the Screen Color and Intensity ........................................................................ 15-6

15.5 Turning OFF the Backlight and Setting the Brightness of the Backlight ...................... 15-9

Chapter 16 Troubleshooting, Maintenance, and Inspection

16.1 Malfunction? First, Investigate. .................................................................................... 16-1

16.2 Messages and Corrective Actions ............................................................................... 16-2

16.3 Performing a Self-Test ................................................................................................. 16-7

16.4 Display an Overview of the System Conditions (Overview)....................................... 16-10

16.5 Replacing the Power Fuse......................................................................................... 16-11

16.6 Recommended Replacement Parts ........................................................................... 16-12

Chapter 17 Specifications

17.1 Input Section ................................................................................................................17-1

17.2 Trigger Section ............................................................................................................ 17-3

17.3 Time Axis ..................................................................................................................... 17-4

17.4 Display ......................................................................................................................... 17-5

11

12

13

14

15

16

17

App

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Index

Contents

Appendix

Index

17.5 Functions ..................................................................................................................... 17-5

17.6 Built-in Printer (Optional) ............................................................................................. 17-8

17.7 Storage ........................................................................................................................ 17-8

17.8 USB Peripheral Interface ............................................................................................. 17-8

17.9 Auxiliary I/O Section .................................................................................................... 17-9

17.10 Computer Interface .................................................................................................... 17-10

17.11 General Specifications............................................................................................... 17-11

17.12 Dimensional Drawings ............................................................................................... 17-13

Appendix 1 Relationship between the Time Axis Setting, Sample Rate and Record Length

..........................................................................................................................App-1

Appendix 2 How to Calculate the Area of a Waveform ...................................................... App-11

Appendix 3 ASCII Header File Format .............................................................................. App-13

Appendix 4 List of Default Values ......................................................................................App-17

Appendix 5 Key Assignments of the USB Keyboard .........................................................App-18

xiv

IM 701730-01E

Chapter 1 Names and Functions of Parts

1.1 Front Panel, Rear Panel, and Top Panel

Front Panel

ESC key

Used to clear the soft key menu and dialog box.

Built-in storage media drive

Used when saving data to a PC card or floppy

DL1735E/DL1740E/DL1740EL

disk. -> Section 12.2

1

Names and Functions of Parts

Soft key

Used to select items on the
soft key menu that appear on
the screen.

SHIFT key

The keys enter the shifted
state when you press the
SHIFT key thereby
illuminating the green
indicator located above the
SHIFT key. The setup menu
marked in purple above the
panel keys can be selected.

1GS/s 500MHz
DIGITAL OSCILLOSCOPE

Jog shuttle

Used to set values, move the cursor,
and select items in setup operations.
Turn the shuttle ring to vary the rate of
change according to its angle.

LCD

SELECT key

Confirms the item selected or value set
using the jog shuttle.

RESET key

HISTORY

MEASURE

POWER

CLEAR
TRACE

MATHMISCFILE

CURSOR

X - Y

SETUP

DISPLAY

VERTICAL

CH

1

CH

2

CH

3

CH

4

GO/NOGO

PHASE

HORIZONTAL

SEARCH

TIME DIV

ACQ STAR T/ST OP

SHIFT

TRIGGER

ZOOM

_

<

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

_

<

50 5Vrms,10Vpk

MENU

MENU

COPY

IMAGE SAVE

PRESET

V DIV

1M /20pF 400Vpk CAT

CH1 CH2 CH3 CH4

SNAP
SHOT

ESC

SELECTRESET

COMP

Resets the value set using the jog

HELP

shuttle to its default.

Arrow (< and >) keys

Moves the selected digit when entering
a value using the jog shuttle.
Used to change settings and move the
cursor.

Functional ground terminal

Connect the ground cable when
performing phase correction of the probe.

Probe compensation signal output
terminal

Outputs the probe compensation
signal.

Measurement Input Terminal

Terminals where probes are connected.
The DL1735E/DL1740E/DL1740EL comes with four
terminals. -> Section 3.4

Power switch -> Section 3.3

Panel keys and knobs

Keys/Knobs that are pressed first when entering a setting or executing an
operation. Display various setup menus. For execution keys, the operation
of the pressed key is executed. For a description of the names and
functions of the panel keys and knobs, see section 1.2.

IM 701730-01E

DL1720E

POWER

COMP

_

<

1M /20pF 400Vpk CAT

CH1 CH2

_

<

50 5Vrms,10Vpk

_

<

1M /20pF 40Vpk

EXT.

External trigger/external clock/trigger gate input
terminal

Used when inputting external trigger, clock, or trigger
gate signals. -> Sections 6.6, 6.16, and 14.1
With the DL1735E/DL1740/DL1740EL, it is located on
the rear panel (see next page).

Signal Input Terminal

Terminals where probes are connected.
Or two terminals with the DL1720E. -> Section 3.4

1-1

1.1 Front Panel, Rear Panel, and Top Panel

Rear Panel

DL1735E/DL1740E/DL1740E

Ethernet port (optional)

Used when connecting to a network. -> Section 13.1

100BASE-TX

LINK

USB

PERIPHERAL

USB

Video signal output connector

Used when displaying the instrument’s screen image on an external
display. -> Section 14.3

GP-IB connector

Used when carrying out communications via

ETHERNET

ACT

VIDEO OUT (VGA)

ISM 1-A N200

GP - IB ( IEEE488 )

MAIN POWER

100-120V
/220-240V AC
250VA MAX
50/60Hz
FUSE
250V T 4A

OFF

ON

the GP-IB interface. For details on the
communication function excluding the Ethernet
communications, see the Communication
Interface User's Manual (IM701730-17E).

Main power switch -> Section 3.3

Power connector -> Section 3.3

EXT CLOCK IN
EXT TRIG IN
TRIG GATE IN
<

_

40Vpk 1M

TRIG OUT
(TTL )

PROBE POWER

A

B

GO/
NO-GO

( 12V DC )

C

D

GO/NO-GO determination output terminal

Outputs GO/NO-GO determination results. ->
Section 10.11

Exhaust holes

-> Section 3.2

Probe power supply terminal

Used to supply power to the FET probe or current probe
made by YOKOGAWA. The DL1735E/DL1740E/DL1740EL
comes with four terminals. -> Section 3.4

Trigger output terminal

Used when outputting the trigger signal externally. -> Section 14.2

External trigger/external clock/trigger gate input terminal

Used when inputting external trigger, clock, or trigger gate signals. ->
Sections 6.6, 6.16, and 14.1

USB connector for connecting to a PC

Used when connecting a PC with a USB interface. -> Communication Interface User’s
Manual (IM701730-17E).

USB connector for connecting peripheral devices

Used when connecting a USB printer, USB keyboard, USB mouse, or USB storage. ->
Sections 4.3, 11.3, and 12.3

DL1720E

GO/
NO-GO

A

TRIG OUT
(TTL )

( 12V DC )

PROBE POWER

B

Probe power supply terminal

Used to supply power to the FET probe or current probe
made by YOKOGAWA. The DL1720E comes with two. ->
Section 3.4

Trigger output terminal

Used when outputting the trigger signal externally. -> Section 14.2

1-2

IM 701730-01E

Top Panel

1.1 Front Panel, Rear Panel, and Top Panel

Handle

Built-in printer (optional)

Prints screen images or setup data. ->
Sections 11.1 and 11.2

1

Names and Functions of Parts

IM 701730-01E

1-3

1.2 Panel Keys and Knobs

Vertical Axis

CH1 to CH4* Keys (Sections 5.1 to 5.10, and 8.9)

• Each key displays a menu used to turn ON/OFF the channel’s display and set the
vertical position, coupling, probe attenuation/current-to-voltage conversion ratio, offset
voltage, bandwidth limit, expansion or reduction of the vertical axis, linear scaling, and
waveform labels.

• If you press a CH key before operating the V/DIV knob to display the menu for the
channel, the channel becomes controllable using the V/DIV knob.

• The indicator to the left of each CH key illuminates when the channel is ON.

* There are two channel keys (CH1 and CH2) on the DL1720E and four channel keys (CH1 to

CH4) on the DL1735E/DL1740E/DL1740EL. The notation CH1 to CH4(2) is used in this
manual to indicate that CH1 to CH2 or CH1 to CH4 can be controlled or configured on the
DL1720E and the DL1735E/DL1740E/DL1740EL, respectively.

Note

The setup menu used to specify whether the offset voltage is applied to the measured and
computed results is located in the menu that appears when the MISC key (see section 1-7) is
pressed.

V/DIV Knob (Section 5.2)

• Sets the vertical sensitivity*.

• Before turning this knob, press one of the CH1 to CH4(2) keys to show the menu for
the channel and have the channel selected.

• If you change the vertical sensitivity setting when waveform acquisition is stopped, the
new setting takes effect when you restart waveform acquisition.

* In the attenuation/current-to-voltage conversion ratio setting of the probe, if the probe

attenuation is specified, the voltage sensitivity is set. If the current-to-voltage conversion ratio
is specified, the current sensitivity is set.

CH

CH

CH

CH

1

2

3

4

VERTICAL

PRESET

V DIV

Horizontal Axis

HORIZONTAL

SEARCH

ZOOM

TIME DIV

PRESET Key (Section 5.7)

• Displays a menu used to automatically set the probe attenuation/current-to-voltage
conversion ratio, V/div, offset voltage, trigger level, and other parameters to the
optimum values for CMOS or ECL signals (or to arbitrary values).

• Presets can also be applied to all channels at once.

TIME/DIV Knob (Section 5.11)

• Sets the horizontal axis (time axis) scale.

• If you change the setting when waveform acquisition is stopped, the new setting takes
effect when you restart waveform acquisition.

ZOOM Key (Section 8.4)

Displays a menu used to set the zoom display of waveforms.

SHIFT+ZOOM (SEARCH) Key (Section 10.4)

Displays a menu used to set waveform searches (Search and Zoom function).

1-4

IM 701730-01E

Triggers

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

1.2 Panel Keys and Knobs

MODE Key (Sections 6.1 and 7.6)

Displays a menu used to set the trigger mode and sequential store.

SHIFT+MODE (ACTION) Key (Section 6.15)

Displays a menu used to set the action-on-trigger.

SIMPLE Key (Sections 6.5 to 6.7)

• Displays a menu used to set the simple trigger (normal edge trigger).

• The simple trigger setting is activated when the indicator located above and to the left
of the SIMPLE key is illuminated.

ENHANCED Key Sections (6.8 to 6.14)

• Displays a menu used to set the enhanced trigger (activates complex triggers such as
pattern triggers).

• The enhanced trigger setting is activated when the indicator located above and to the
left of the ENHANCED key is illuminated.

POSITION Key (Section 6.2)

Displays a menu used to set the trigger position.

SHIFT+POSITION (DELAY) Key (Section 6.3)

Displays a menu used to set the trigger delay.

1

Names and Functions of Parts

TRIG’D Indicator

Illuminates when a trigger is activated.

Note

The setup menu for the trigger gate is located in the menu that appears when the MISC key
(see page 1-7) is pressed.

Common Operations and Waveform Acquisition, Display, Computation, Analysis, and
Search

CLEAR
TRACE

HISTORY

MEASURE

CURSOR

SETUP DISPLAY

X - Y

MISCFILE

MENU MENU

COPY

IMAGE SAVE

GO/NO-GO

MATH

PHASE

SHIFT

ACQ S TART/STOP

SETUP Key (Sections 4.4, 4.5, and 12.1)

Displays the auto setup menu in which settings can be automatically configured
according to the input signal, the initialize menu in which settings can be initialized to
their factory defaults, and the setup data can be stored/recalled.

DISPLAY Key (Sections 8.1 to 8.3, and 8.7, 8.8, and 8.10)

Displays a menu used to set the waveform display and information display.

SHIFT+DISPLAY (X-Y) Key (Section 8.5)

Displays a menu used to set the X-Y display.

ESC

SNAP
SHOT

SELECTRESET

HELP

IM 701730-01E

MEASURE Key (Sections 10.6 to 10.8)

Displays a menu used to set the automated measurement of waveform parameters and
statistical processing.

CURSOR Key (Section 10.5)

Displays a menu used to set cursor measurements.

1-5

1.2 Panel Keys and Knobs

GO/NO-GO Key (Sections 10.9 and 10.10)

Displays a menu used to set GO/NO-GO determination.

MATH Key (Sections 9.1 to 9.7)

Displays a menu used to set waveform computation.

SHIFT+MATH (PHASE) Key (Section 9.8)

Displays a menu used to set phase shifts.

HISTORY Key (Sections 10.1 to 10.3)

Displays a menu used to display and search waveforms using the history memory
function. Waveforms that have been sequentially stored can also be displayed and
searched.

ACQ Key (Sections 5.10 and 7.2 to 7.5)

Displays a menu used to set the record length, acquisition mode, interleave mode,
sampling mode, time base, and other parameters for waveform acquisition.

START/STOP Key (Section 7.1)

Starts/Stops waveform acquisition according to the trigger mode. Waveform acquisition
is in progress when the indicator above the START/STOP key is illuminated.

Printing Screen Images and Saving and Loading Data

CLEAR
TRACE

HISTORY

ESC

SNAP
SHOT

HELP

MEASURE

CURSOR

SETUP DISPLAY

X - Y

MISCFILE

MENU MENU

COPY

IMAGE SAVE

GO/NO-GO

MATH

PHASE

SHIFT

ACQ S TART/STOP

SELECTRESET

FILE Key (Sections 12.4 to 12.8, and 12.11 to 12.13)

• Displays a menu used to save or load various data from the storage medium (built-in
storage medium, external USB storage, or net drive).

• You can display thumbnails of the screen image data that are saved.

COPY Key (Chapter 11)

Executes the printing of the screen image on a printer (built-in printer, USB printer, or
network printer).

SHIFT+COPY (MENU) Key (Sections 11.2 to 11.4)

Displays a menu used to print screen images on a printer.

IMAGE SAVE Key (Section 12.9)

Executes the saving of the screen image data to a storage medium.

IMAGE SAVE (MENU) Key (Sections 12.9 and 12.10)

• Displays a menu used to save screen image data to a storage medium.

• You can display thumbnails of the screen image data that are saved.

1-6

IM 701730-01E

Calibration, Ethernet Communications, and Other Operations

CLEAR
TRACE

HISTORY

1.2 Panel Keys and Knobs

SNAP

HELP

SHOT

ESC

1

Names and Functions of Parts

MEASURE

CURSOR

SETUP DISPLAY

X - Y

MISCFILE

MENU MENU

IMAGE SAVE

COPY

GO/NO-GO

MATH

PHASE

SHIFT

ACQ S TART/STOP

SELECTRESET

MISC Key

-> Sections 3.6, 4.6, 4.7, 6.16, chapters 13 and 15, sections 16.3, 16.4, and the
Communication Interface User’s Manual (IM701730-17E)

• Displays a menu used to set the date/time, calibration, input signal delay time
correction, trigger gate, Ethernet communications, menu and message language, ON/
OFF of the click sound, USB keyboard language, ON/OFF of the application of the
offset voltage to the measured and computed results, screen color and intensity,
backlight, self test, and remote control.

• Displays the setup data and system condition (the presence/absence of options,
firmware version, etc.).

SNAP SHOT Key (Section 8.6)

Freezes the currently displayed waveform on the screen in black and white (default
setting).

CLEAR TRACE Key (Section 8.6)

Clears the snapshot waveforms and accumulated waveforms.

HELP Key (Section 4.8)

Turns the help window that provides description about the procedure ON and OFF.

IM 701730-01E

1-7

1.3 Display Screens

Normal Display Screen

Record length/display position

The length of the
green frame
indicates the ratio
of the display
record length with

<When displaying normal waveforms>

Specified record length

Display position

Green frame

<When displaying zoom waveforms>

50k

Z1 zoom position

Z1
Z2

Z2 zoom position

Display position of the normal waveform

50k

Green frame

Internal processing indication

Indicates the current processing status by the color of the
symbol.
Green Computing (power spectrum) or accumulating

history waveforms

Yellow Automated measurement of parameters in progress

or searching

Blue Sending mail, executing a command of the FTP

server function, or executing an HTTP command

Waveform acquisition status

Stopped
Running (acquisition in progress)
Running Pre... (acquiring pre data)
Running Post... (acquiring post data)
Running Waiting for Trigger

Date/time See
section 3.6.

Label of the

Waveform acquisition count

Display record
length -> App. 1

Trigger position
mark. See section

6.2.

displayed waveform

See section 8.9.

Scale value

See section 8.8.

Vertical position mark

See section 5.3.

Ground level mark

See section 2.2.

Trigger level mark

See section 2.3.

Time from the trigger
position to the left
and right ends of the
waveform display
frame

Setup menu

* If the vertical axis scale is changed when waveform acquisition is stopped, the new vertical axis sensitivity is

displayed highlighted at the position where the input coupling and bandwidth limit are displayed.

Specified record length. See section 7.2.

Sample rate. See appendix 1.

Acquisition mode. See section 7.5.

Normal Normal mode
Env Envelope mode
Avg Averaging mode
BoxAvg Box average mode
If the horizontal axis scale is changed when waveform
acquisition is stopped, the new horizontal axis scale and
sample rate are displayed highlighted at the position where the
acquisition mode is displayed.

Horizontal axis scale (time axis T/div)
See section 5.11.

Connected to the network

-> Chapter 13

Rectangular frame

Enclosed by a rectangular
frame when the channel is
being set by V/div.

Waveform display
channels*

Vertical axis sensitivity
(V/div)* -> See section 5.2.

Bandwidth limit*

-> Section 5.8
Input coupling.
See section 5.4.

Probe
attenuation/current-to­voltage conversion ratio

-> Section 5.5
Trigger slope. See

section 2.3 and chapter 6.
Trigger source. See

section 2.3 and chapter 6.

Comment

Displays the specified
comment when printing or
saving the screen image.

Trigger level. See section 2.3 and
chapter 6.

Trigger mode. See section 6.1.

Trigger type. See section 2.3 and chapter 6.

1-8

Note

In some cases, the LCD on the instrument may include a few defective pixels. For details, see
section 17.5.

IM 701730-01E

Display Example When Displaying Zoom Waveforms

Zoom position of zoom waveform Z1 with respect to the
specified or display record length

Zoom position of zoom waveform Z2 with respect to
the specified or display record length

Zoom box Z1
indicating the zoom
range of Z1

Main waveform
display frame

Zoom waveform
display frame

1.3 Display Screens

Zoom box Z2 indicating the
zoom range of Z2

T/div of the normal waveform

See section 5.11.

1

Names and Functions of Parts

Display record
length of the
normal waveform

Display record
length of Z1

Display record
length of Z2

T/div for Z2

T/div for Z1

Display frame of Z1 Display frame of Z2

Display Example When Displaying X-Y Waveforms

Main waveform
display frame

Waveform
assigned to the

X-Y waveform
display frame

Y-axis

Waveform
assigned to the
X-axis

X-axis scale value

Y-axis scale
value

IM 701730-01E

1-9

1.3 Display Screens

Display Example of the Setup Information List

If you press the Setup Info soft key (displayed on the second page of the menu that
appears when pressing the MISC key), a list of setup data is displayed as shown below.
This screen can be printed as additional information (see section 11.2) when the
waveforms displayed on the screen (screen image) are printed on the built-in printer
(optional).

List of Setup Information

Setup data related to the vertical axis, trigger, and horizontal axis of CH1 to CH4(2) is
displayed.

1-10

IM 701730-01E

Chapter 2 Explanation of Functions

2.1 System Configuration and Block Diagram

System Configuration

Input

USB PERIPHERAL

interface

Data save/load

2

Explanation of Functions

USB mouse

Block diagram

USB storage

External clock input
External trigger input
Trigger gate input

GO/NO-GO determination
output
RGB video signal output
Trigger output

Device under
measurement

Signal input

ATT

CH1

CH2

CH3*

CH4*

External clock input
External trigger input
Trigger gate input

Built-in printer (optional)

Print screen images

Floppy disk or PC card

Pre-

Multiplexer

AMP

Trigger

circuit

Waveform data
Setup data
Screen image data

Primary
memory

A/D

Primary

data

processing

circuit

Time base

USB PERIPHERAL

interface

Screen data

Waveform data
Setup data
Screen image
data

PC

Acquisition

memory

Display

Primary

data

processing

circuit

processing

Display

memory

processing

memory

Input

USB keyboard

USB printer

GP-IB interface
USB interface
Ethernet interface (optional)

VGA video

output

Color LCD

Display

circuit

Data

CPU

Built-in printer

Keyboard

PC card

Ethernet

Trigger output

(Optional)

GP-IB

USB

FDD or

(Optional)

IM 701730-01E

* CH3 and CH4 not available on the DL1720E. On the DL1720E, an input terminal is provided in

the CH4 position that can be used alternately for an external trigger, external clock, or trigger
gate.

2-1

2.1 System Configuration and Block Diagram

Signal Flow

The signal applied to each signal input terminal is first passed to the vertical control
circuit consisting of an attenuator (ATT) and pre-amplifier. At the attenuator and pre­amplifier, the voltage and amplitude of each input signal is adjusted according to the
settings such as the input coupling, probe attenuation ratio, V/div, and offset voltage. The
adjusted input signal is then passed to the multiplexer, and then passed from the
multiplexer to the A/D converters according to the time axis settings.
At the A/D converter, the received voltage level is converted into digital values. The
digital data is written to the primary memory by the primary data processing circuit at the
sample rate that matches the time axis setting.
The data written to the primary memory is processed (averaged, for example) by the
secondary data processing circuit and written to the acquisition memory.
The data written to the acquisition memory is converted into waveform display data by
the secondary data processing circuit, transferred to the waveform processing circuit,
and stored in the display memory. The waveforms are displayed on the LCD using the
data stored in the display memory.

2-2

IM 701730-01E

2.2 Vertical and Horizontal Axis

Vertical Sensitivity (V/div) <For the setup procedure, see section 5.2>

The vertical sensitivity setting is used to adjust the displayed amplitude of the waveform
for easy viewing.
The vertical sensitivity is set by assigning a voltage to one grid square (one division) on
the screen.
By switching attenuators with different attenuation and changing the amplification of the
pre-amplifier, the sensitivity changes in steps (for example, vertical axis sensitivity
changes in steps as in 1 V/div, 2 V/div, and 5 V/ div).
In addition, by computing the digital data of the waveforms acquired at the vertical
sensitivity described above, the waveforms can be displayed by setting the sensitivity to

0.4 (or 0.5) to 10 times the vertical axis setting that was used to acquire the waveforms

(Variable).

If 1.00 V/div is changed to 0.500 V/div

Vertical
position
mark

GND level
mark

1 div = 1.00 V 1 div = 0.500 V

2

Explanation of Functions

Note

Voltage Axis Sensitivity Setting and Measurement Resolution

For precise voltage measurements, set the voltage axis sensitivity so that the amplitude of the
displayed waveform is maximized.
The instrument uses 8-bit A/D converters to sample the input signal at a resolution of 255
levels (LSB). On the screen, the waveforms are displayed using twenty-four levels per
division on the grid.

Valid Data Range

Assuming that the output value from the A/D converter is in the range of 0 to 255, the data
point at the center of the screen corresponds to 128 of the A/D output. However, because the
full range of the A/D converter is 255 levels, the 256th level on the screen is not used. In
addition, the instrument handles the output values of the A/D converter as 0s and 1s.
Therefore, the valid data range of the instrument is approximately ±5.29 divisions from the
center of the screen.
If the vertical axis position is moved after stopping data (waveform) acquisition, the valid data
range also moves by the same amount.

Vertical Position of the Waveform <For the setup procedure, see section 5.3>

Since the instrument is capable of displaying four channels (two channels on the
DL1720E) of input waveforms, the waveforms may overlap making them difficult to be
observed. In this case, you can change the display position of waveforms along the
vertical axis (vertical position) for easier viewing.
The vertical position can be set in the range of ± 4 divisions.
The vertical sensitivity (V/div) switches around the vertical position (mark).

Position 2.00 div

IM 701730-01E

Position 0.00 div

Vertical position
mark

Position –3.00 div

2-3

2.2 Vertical and Horizontal Axes

Input Coupling <For the setup procedure, see section 5.4>

If you wish to observe just the amplitude of an AC signal, it is best to remove the DC
component from the input signal. On the other hand, there are times when you wish to
check the ground level or observe the entire input signal (both the DC and AC
components). In these cases, you can change the input coupling setting. By changing
the input coupling, the method used to input the signal to the vertical control circuit
(voltage axis) is switched.
The input coupling can be set to one of the following.

AC1 MΩ

The input signal is coupled to the attenuator of the vertical control circuit through a
capacitor. This setting is used when you wish to observe only the amplitude of the AC
signal, eliminating the DC component from the input signal.

Input
terminal

1 MΩ

DC1 MΩ

The input signal is directly coupled to the attenuator of the vertical control circuit. Use
this setting if you wish to observe the entire input signal (DC component and AC
component).

Vertical

control

circuit

Input
terminal

1 MΩ

Vertical

control

circuit

DC50 Ω

This setting is similar to DC1 MΩ described above except the input impedance is 50 Ω .
Use caution because the allowable maximum input voltage is decreased.

Input
terminal

50 Ω

Vertical
control

circuit

GND

The input signal is coupled to the ground, not to the attenuator of the vertical control
circuit. You can use this setting to check the ground level on the screen.

Input
terminal

Vertical

control

circuit

2-4

IM 701730-01E

Probe Attenuation/Current-to-Voltage Conversion Ratio
<For the setup procedure, see section 5.5>

Normally a probe is used in connecting the circuit being measured to the measurement
input terminal. Using a probe has the following advantages.

• Avoids disturbing the voltage and current of the circuit being measured.

• Inputs the signal with no distortion.

• Expands the voltage range that the instrument can measure.

The instrument comes standard with 400 MHz passive probes. The probe attenuates the
measured signal to 1/10. When using a probe, the attenuation setting on the DL1700E
must be set equal to the probe’s attenuation so that the measured voltage can be read
directly. When using the 400 MHz Passive Probe (voltage probe) that comes with the
instrument, enter a setting of 10:1.
The other voltage probe settings that are available on the instrument are 1:1, 100:1, and
1000:1, and for the current probe, 10 A:1 V (0.1 V/A), and 100 A:1 V (0.01 V/A). When
using a probe other than one supplied with the instrument, set the attenuation ratio on
the instrument to match that of the probe used.

Offset Voltage <For the setup procedure, see section 5.6>

When observing a voltage riding on top of a predetermined voltage, an offset voltage can
be applied to eliminate the predetermined voltage so that only the changes in the signal
can be observed with higher voltage axis sensitivity.
Usually, the offset voltage does not affect the cursor measurement values, the result of
the automated measurement of waveform parameters, or the computed values.
However, you can apply the offset voltage to cursor measurement values, the result of
the automated measurement of waveform parameters, and the computed values by
setting Offset Cancel to ON (see section 15.3).

When Offset Cancel is OFF

1 V/div, Offset: 0 V,
Position: 0 div

1 V/div, Offset: –2 V 500 mV/div, Offset: –2 V

2.2 Vertical and Horizontal Axes

2

Explanation of Functions

When Offset Cancel is ON

Bandwidth Limit <For the setup procedure, see section 5.8>

You can set a bandwidth limit at 20 MHz or 100 MHz against the input signal for each
channel. You can observe waveforms with the noise components above the specified
frequency eliminated.

Linear Scaling <For the setup procedure, see section 5.9>

You can set the scaling coefficient A, offset value B, and units (UNIT) for the measured
values (X) obtained through cursor measurement or automatic measurement of
waveform parameters.
For example, this is useful for converting voltage values to current values by multiplying
the values measured on the instrument by the voltage ratio of an external voltage divider.

Y (UNIT) = AX + B X: Value before linear scaling

Y: Value after linear scaling

IM 701730-01E

2-5

Display record length

2.2 Vertical and Horizontal Axes

Horizontal Axis (Time Axis)

Selecting the Time Base <For the setup procedure, see section 5.10>

By default, the sampling timing of waveform data is controlled by the internal clock signal
generated from the time base circuit within the instrument (see the block diagram in
section 2.1). The timing can also be controlled by a clock signal applied externally.
External clock signals are input through the external clock input terminal on the rear panel.
The external clock input is useful for observing a signal whose period varies or for
observing waveforms by synchronizing to the clock signal of the signal being measured.

Time Axis Setting <For the setup procedure, see section 5.11>

When using the internal clock, the time axis scale is set in terms of the time per one grid
square (one division). The setting range is 1 ns/div to 50 s/div (or 1ns/div to 5s/div when
the record length is equal to 1 kWord). Since the horizontal axis display range is 10 div,
the waveform display time is T/div x 10.

1 div=500 µs

1 div=1 ms

10 div

Note

Display along the Time Axis

Sampled data is acquired to the acquisition memory, and waveforms are displayed based on
the stored data.
The number of display lines in ten divisions of the screen (along the time axis) is 500 (250
lines in the zoom waveform display section of Main & Z1 & Z2). Therefore, the waveforms are
processed according to the display record length as described below. For more details about
the relationship between the time axis, acquisition mode, record length of the acquisition
memory, display record length, and other parameters, see appendix 1, “Relationship between
the Time Axis, Sample Rate, and Record Length.”

• When the display record length is greater than the number of display points
Multiple data existing on the same display line on the time axis are connected by a line
and displayed

• When the display record length is less than the number of display points
The display is interpolated (see section 2.4).

Record length loaded into

the acquisition memory

Display record length

Voltage axis

Sampled data

On the screen

2-6

500 lines

Relationship between the Time Axis Setting, Sample Rate, and Record Length

The sample rate and record length of the data loaded into the acquisition memory changes
when the time axis setting is changed.
For more details about this relationship, see appendix 1, “Relationship between the Time
Axis, Sample Rate, and Record Length.”

Time axis

IM 701730-01E

2.2 Vertical and Horizontal Axes

Relationship between the Time Axis Setting and Sampling Mode

Depending on the time axis setting, you can switch the mode used to sample the input signal
(sampling mode). The time axis settings that allow the sampling mode to be changed vary
depending on the acquisition mode and other settings. For more details about this
relationship, see appendix 1, “Relationship between the Time Axis, Sample Rate, and Record
Length.”

• Realtime Sampling Mode

By changing the time axis setting, the sample rate changes, allowing sampling of data at
up to 1 GS/s (or 500 MS/s when interleave mode is OFF; for a description of interleave
mode, see section 7.5). The input signal is sampled sequentially, and the data is stored
in the acquisition memory.
In this mode, the instrument can only display waveforms correctly up to one-half the
frequency of the sample rate (the number of samples per second, in units of S/s) as
defined by the sampling theorem.* Therefore, this mode is best suited for observing
waveforms that undergo slow changes relative to the sample rate.

* If the sample rate is comparatively low with respect to the input signal frequency, the

harmonics contained in the signal are lost. In this case, some of the harmonics will appear
at low frequencies due to the effects described by the Nyquist sampling theorem. This
phenomenon is called aliasing. You can prevent aliasing by acquiring waveforms with the
acquisition mode set to envelope.

Aliased signal Input signal Sampling point

2

Explanation of Functions

• Repetitive Sampling Mode

In repetitive sampling mode, you can set the time axis to a setting that will cause the
sample rate to exceed 1 GS/s (2 GS/s when interleave mode is ON). In this mode, one
waveform is created from several cycles of a repetitive signal. This is equivalent to
sampling the signal at a higher sample rate than the actual sample rate. The maximum
apparent sample rate is 100 GS/s on the instrument.
In addition, even in realtime sampling mode, if the relationship of the time axis and the
display record length would cause the sample rate to exceed 1 GS/s (or 2 GS/s when
interleave mode is ON), the mode automatically switches to repetitive sampling. There are
two types of repetitive sampling.
One is sequential sampling in which the data is sampled by intentionally offsetting the
sampling points by a certain time with respect to the trigger point. The other is random
sampling in which the data that is offset randomly from the trigger point is sampled and
resorted with respect to the trigger point. The instrument employs random sampling which
enables the waveform before the trigger point (trigger position, see section 2.3) to be
observed.

Time Axis Setting and Roll Mode Display

If T/div is set to a certain range (see appendix 1, “Relationship between the Time Axis,
Sample Rate, and Record Length), the waveforms are displayed in roll mode. In roll mode,
the displayed waveform is not updated using triggers (update mode). Rather, the oldest data
is deleted as new data is acquired, and the waveform is shifted from right to left on the
screen. Roll mode display allows waveforms to be observed in the same way as on a pen
recorder. It is useful in observing slowly repeating signals or signals that change slowly. It is
also useful in detecting glitches (spikes in the waveform) that occur intermittently.
* Roll mode display is also used when the trigger mode is set to Single. However, the

displayed waveforms stop when a trigger is activated.

IM 701730-01E

2-7

2.3 Triggers

Trigger Source, Trigger Slope, and Trigger Level

Trigger Source

Trigger source refers to the signal against which trigger conditions are checked.

Trigger Slope

Trigger slope refers to the movement of the signal from a low level to a high level (rising
edge) or from a high level to a low level (falling edge). When the slope is used as one of
the trigger conditions, it is called a trigger slope. Edge refers to the point where the
trigger source slope passes the trigger level (or, when trigger hysteresis (see page 2-13)
is specified, the point where the slope passes the hysteresis level).

Trigger Level

Trigger level refers to the level at which a trigger is activated when passed by the trigger
source.
With simple triggers such as the edge trigger described later, a trigger is activated when
the level of the trigger source passes through the specified trigger level.

Trigger source

Trigger level

Trigger activates here on
a rising edge ( ).

Trigger Type <For the setup procedure, see chapter 6>

The triggers used on the instrument can be classified into two main types: simple triggers
and enhanced triggers.

Simple Triggers

This function activates triggers on a single trigger source.

• Edge Trigger <For the setup procedure, see sections 6.5 to 6.7>

This function activates a trigger on a single trigger source. It is the simplest kind of
trigger. A trigger is activated when the trigger source rises above (rising) or falls
below (falling) a specified trigger level.
You can select the trigger source from input signals (CH1 to CH4, or CH1 to CH2 on
the DL1720E), the external trigger signal, and the commercial power supplied to the
instrument. In the case of commercial power supply signals, a trigger is activated only
on the rising edge.

Enhanced Triggers

Multiple conditions or a special-purpose condition can be specified as a trigger condition.

• A->B(N) Trigger <For the setup procedure, see section 6.8>

A trigger is activated the nth time condition B becomes true after condition A has
become true.

2-8

True

A

True N times

B

Trigger

IM 701730-01E

Condition A: CH1 = L, CH2 = L, Enter, Condition B: CH1 = H, CH2 = H, Enter, N = 3
L: low level, H: high level

CH1

CH2

Trigger

CH1
CH2

HL L

L

Condition A true

HHHHLLL

B (1) B (2)B (3)

H

LH HL

H
L

•A Delay B Trigger <For the setup procedure, see section 6.9>

The trigger activates the first time condition B becomes true after condition A has
become true and the preset time has elapsed.

2.3 Triggers

2

Explanation of Functions

Tru e

A

Condition A: CH1 = L, CH2 = L, Enter, Condition B: CH1 = H, CH2 = H, Enter, Delay = 1 µs

CH1

CH2

HL L

CH1

L

CH2

HHHHLLL

Condition A true Condition B true

Delay Time

1 µs

Progress

Tri gg er

H

B

LH HL

Tru e

Tri gg er

H
L

• Pattern Trigger <For the setup procedure, see section 6.10>

With pattern triggers, the multiple trigger sources are set, and a trigger is activated
when all of the trigger conditions of the trigger sources are met or when the trigger
conditions are no longer met. Trigger conditions are specified by combining the status
(high or low) of each trigger source. In addition, one of the trigger sources can be set
to the clock signal, and the trigger can be activated in sync with the clock signal.

Condition CH1 = L, CH2 = L, CH3 = H, CH4 = L

IM 701730-01E

CH1

CH2

*1

CH3

*1

CH4

LH L L L

CH1
CH2
CH3
CH4

*1

*1

HHHHLLLL

H

HLL

Trigger is activated

H

L
HLLH

*1 1. CH3 and CH4 not

available on the DL1720E.

2-9

2.3 Triggers

• Width Trigger <For the setup procedure, see section 6.11>

A trigger is activated by determining whether the time width over which the specified
condition is met or not met is shorter or longer than the determination time width set in
advance. The condition is set on the AND logic of the status (High, Low, or Don’t
Care) of each channel or the AND logic of the window condition (IN, OUT, or Don’t
Care) of each channel.

CH1

CH2

CH1
CH2

L

H

H

H

500 ns

450 ns

L

D

A

H

L

H

300 ns

LL

LHHL

B

H

L

400 ns

C

When the condition is set to CH1 = H, CH2 = L, CH3* = X, CH4* = X, Condition =
True, and Time = 350 ns

Determination Type Results

Pulse <T Trigger is activated at point B.
Pulse > T Trigger is activated at points A and C.
T1 < PLS < T2 When set to Time1 = 350 and Time2 = 450 ns, the trigger activates at

Time Out When set to Time1 = 450, the trigger activates at point D.
* CH3 and CH4 not available on the DL1720E.

point C.

• OR Trigger <For the setup procedure, see section 6.12>

A trigger is activated when any of the edge or window conditions specified on
channels 1 through 4 are met. For example, a trigger can be activated on the rising
edge of CH1 or CH2.

CH1

2-10

CH2

Triggers

Condition CH1 = , CH2 =

TriggersTriggers

• Window Trigger <For the setup procedure, see section 6.13>

A certain voltage range (window) is set and a trigger is activated when the trigger
source level enters this voltage range (IN) or exits from this voltage range (OUT). This
trigger is used in combination with the OR or Width trigger. The window trigger setting
is located in the OR or Width trigger menu.

IN

Width

Center

Trigger is activated

Window

Trigger is activated

OUT

Center

Width

Trigger is activated

Window

IM 701730-01E

• TV Trigger <For the setup procedure, see section 6.14>

This trigger is used when observing video signals. The following broadcasting types
are supported: NTSC, PAL, SECAM, 1080/60i, 1080/50i, 720/60p, 480/60p, 1080/
25p, 1080/24p, 1080/24sF, and 1080/60p.

Trigger Mode <For the setup procedure, see section 6.1>

Sets the conditions for updating the displayed waveforms. The following five trigger
modes are available.

Auto Mode

If a trigger occurs within a specified amount of time (approximately 100 ms, referred to
as the timeout time), the displayed waveforms are updated. If a trigger is not activated
within the timeout time, the displayed waveforms are automatically updated.

2.3 Triggers

2

Explanation of Functions

Auto Level Mode

If a trigger occurs within the timeout period, the waveform is displayed in the same
fashion as in auto mode. If a trigger is not activated within the timeout time, then the
center value of the amplitude of the trigger source is detected, and the trigger level is
changed to that value. A trigger is activated using the new value, and the displayed
waveforms are updated.

1/2 the amplitude

Trigger level

1/2 the amplitude

Normal Mode

The displayed waveforms are updated only when a trigger occurs. The displayed
waveforms are not updated if a trigger does not occur.

Single Mode

When a trigger is activated, displayed waveforms are updated only once, then
acquisition stops. This mode is useful when you are observing a single-shot signal.

Single(N) Mode

Waveforms are acquired and stored in different memory areas each time a trigger is
activated the specified number of times. Then, acquisition is stopped, and all the
acquired waveforms are displayed. For details on the acquisition method of waveforms in
Single(N) mode, see “Sequential Store” on page 2-16.

Amplitude

IM 701730-01E

2-11

2.3 Triggers

Trigger Position <For the setup procedure, see section 6.2>

When you start waveform acquisition, a trigger is activated according to a specified
trigger condition, and the waveform acquired to the acquisition memory is displayed. If
the trigger delay described below is set to 0 s, the point at which the trigger is activated
(trigger point) and the trigger position match. By moving the trigger position on the
screen, you can change the display ratio of the pre-data—the waveform data stored in
the acquisition memory before the trigger point (pre-trigger section)—and the postdata—
data after the trigger point (post-trigger section).

Display record length

0%

Pre-trigger section

Trigger position

Post-trigger section

100%

Trigger Delay <For the setup procedure, see section 6.3>

Normally, the waveform around the trigger point is displayed. However, by setting a
trigger delay, you can display the waveform that is acquired a specified time after the
trigger point. The selectable range of trigger delay is 0 to 4 s.

T (Trigger position)

Delay

Trigger point

Trigger Coupling <For the setup procedure, see sections 6.5, 6.8 to 6.13>

As with the input signals, the input coupling can be switched on trigger sources. Select
the input coupling that is suitable for the trigger source signal.
The following two types of input coupling are available for the trigger source signal.

DC: Select this setting when using the source as-is with no processing of the signal.
AC: Select this setting when using the signal with the DC components removed for the

trigger source. When this setting is used, a trigger can always be activated on
signals whose amplitude is around one division or greater if the trigger level is set
to 0 V.

HF Rejection <For the setup procedure, see sections 6.5, 6.8 to 6.13>

Turn HF rejection ON when eliminating high frequency components above 15 kHz or 20
MHz from the trigger source. This prevents triggers from being activated at unexpected
points due to the effect of high frequency noise.

Trigger Gate <For the setup procedure, see section 6.16>

You can control whether to enable a satisfied trigger condition using an external signal.
You can also select the status of the external signal that enables the satisfied trigger
condition.

2-12

IM 701730-01E

Trigger Hysteresis <For the setup procedure, see sections 6.5, 6.8 to 6.12>

If there is insufficient trigger level width and noise is present in the trigger source, the
trigger point fluctuates each time a trigger is activated. This causes the displayed
waveforms to be unstable. Therefore, a given margin (hysteresis) is added to the
specified trigger level.
You can select

(narrow hysteresis) or (wide hysteresis) on the instrument. When
set to , the hysteresis widens thereby reducing the fluctuation of the trigger point
caused by noise. Thus, a stable waveform display is achieved. However, this setting
tends to make the trigger point ambiguous. On stable waveforms without noise, set the

hysteresis to make the trigger point more accurate.

Hysteresis width

Trigger is activated

Trigger Hold Off <For the setup procedure, see section 6.4>

The trigger hold-off function temporarily stops detection of the next trigger once a trigger
has been activated. This function is useful when observing a pulse train signal, such as a
PCM code and you wish to display the waveform in sync with repetitive cycles, or when
using the history memory function described later (see page 2-16) and you want to
change the waveform acquisition period.

2.3 Triggers

2

Explanation of Functions

Trigger level

Input signal

Trigger source
signal

Trigger signal limited by hold off time t (when the trigger slope is set to rising edge)

Period of repetition: T

t

Action-on-Trigger <For the setup procedure, see section 6.15>

A specified action can be executed each time a trigger is activated. You can select from
various actions including sounding of a buzzer, saving of waveform data or screen image
data, printing of screen image data, or transmission of e-mail messages (when the
Ethernet interface option is installed).

IM 701730-01E

2-13

2.4 Waveform Acquisition and Display Conditions

Record Length <For the setup procedure, see section 7.2>

The term record length refers to the number of data points acquired per channel in the
acquisition memory.
The record lengths that can be specified (specified record length) are 1 kW (1000
points), 10 kW, 50 kW, 100 kW, 250 kW, 500 kW, 1 MW, 2 MW, 4 MW, and 8 MW. The
maximum record length that can be specified varies depending on the model and
interleave mode setting.
Displayed record length refers to the number of these data points that are actually
displayed on the screen. When the time axis setting is changed, the sample rate and
display record length change (see appendix 1).
In most cases, the displayed record length is identical to the (acquisition) record length.
For certain time-axis settings, however, the lengths become different (see appendix 1).

Specified Record Length

The length of the green frame indicates the

50 k

ratio of the display record length with

Display position

Green frame

Interleave Mode <For the setup procedure, see section 7.3>

This mode allocates the memory of even channels to the odd channels (for example
allocating the memory of CH2 to CH1) to enable the use of twice the normal memory.
When interleave mode is turned ON, even channels can no longer be used, but
parameters such as the history memory, acquisition count of sequential store, and record
length can be set twice their normal values.
In addition, since two A/D converters can be used to sample a single input signal and
raise the maximum sample rate, a sample rate of 2 GS/s can be achieved in realtime
sampling mode.
For the relationship between interleave mode, time axis, record length, and sample rate,
see appendix 1.

respect to the specified record length.

Sampling Mode <For the setup procedure, see section 7.4>

As explained in “Relationship between the Time Axis Setting and Sampling Mode” in
section 2.2, the sampling mode can be switched between realtime sampling mode and
repetitive sampling mode depending on the time axis and record length settings. The
time axis range that allows repetitive sampling mode varies depending on the acquisition
setting. For details, see appendix 1.

Acquisition Mode <For the setup procedure, see section 7.5>

When storing sampled data in the acquisition memory (see “Signal Flow” in section 2.1),
it is possible to perform processing on data and display waveforms based on the
processed data. The following four types of data processing are available.

Normal Mode

In this mode, sampled data is stored in the acquisition memory without processing.

2-14

IM 701730-01E

2.4 Waveform Acquisition and Display Conditions

Averaging Mode

Averaging is a process in which waveforms are acquired repeatedly to obtain the
average of waveform data at the same time point (the same time in relation to the trigger
point).
The instrument takes the exponential or simple average of the waveform data and writes
the results to the acquisition memory. The averaged data is then used to generate the
display.
You can set an average count of Infinite for exponential averaging, or in the range from 2
to 65536 (in 2
Set the attenuation constant for exponential averaging in the range from 2 to 256 (2

n

steps where n is a natural number) for simple averaging.

n

steps where n is a natural number).

2

Explanation of Functions

Exponential averaging (when set to infinite)

1

An = {(N–1)A

N

An

: nth averaged value

Xn

: nth measured value

N

: Attenuation constant (2 to 256, 2n steps)

n–1 + Xn

}

Simple average (when set to 2 to 65536)

N

Σ X

n

n = 1

N =

A

N

XnN: nth measured value

: Average count
(acquisition count, 2n steps)

Envelope Mode

In normal mode and averaging mode, the sample rate (the number of times data is
acquired per second in the acquisition memory) drops if T/div is increased (see appendix

1). However, in envelope mode, the maximum and minimum values are determined from
the data sampled at 400 MS/s (or 800 MS/s or 1GS/s when interleave mode is ON) at
time intervals two times that of the sampling period of normal mode, and are stored as
pairs in the acquisition memory.
Envelope mode is useful when you want to avoid aliasing (see section 2.2), since the
sample rate is kept high irrespective of the time axis setting. It is also useful when you
want to detect glitches (pulse signals which rise very fast) or display an envelope of a
modulating signal.

Envelope curve

IM 701730-01E

Box Average

The moving average of the data sampled at 400 MS/s (or 800 MS/s or 1GS/s when
interleave mode is ON) is determined, stored in the acquisition memory, and displayed.
Box averaging is useful for eliminating small amounts of noise from the input signal. It
can also remove noise from a single-shot signal.

36

Time

b

Time

Input signal
(At 20 MS/s,
interleave OFF)

Box averaged data

Voltage Voltage

21

2

1

a

20

2-15

2.4 Waveform Acquisition and Display Conditions

Sequential Store <For the setup procedure, see section 7.6>

This function stores waveform data in the acquisition memory the specified number of
times and displays the data when in realtime sampling mode. The operation stops when
acquisition is finished. This function operates when the trigger mode is set to Single(N).
The maximum number of waveform acquisitions of sequential store varies from 1 to 2048
depending on the specified record length, interleave mode, and model. A record length
of one waveform (the amount of one acquisition on one channel) is the same as the
maximum display record length.
Once the specified number of waveforms have been stored, you can display any of the
waveforms individually or all of them together. This function is useful when capturing the
changes in the waveform over time. Waveforms are not displayed while waveform
acquisition is in progress.
The figure below shows an example when data is sequentially stored one hundred times.

Display example when the acquisition count is 100

• Display all waveforms
(when selecting ALL)

• Display the newest
waveform (when Select
Record No. = 0)

• Display the oldest
waveform (when Select
Record No. = –99)

History Memory <For the setup procedure, see section 10.1>

When waveforms are being measured, the waveform data stored in the acquisition
memory as a result of a trigger being activated is displayed as waveforms on the
instrument screen. When triggers are continuously activated and waveforms are
acquired, it is impossible to stop the measurement in time when an abnormal waveform
appears (newer waveforms appear on the screen). Normally, abnormal waveforms in the
past cannot be displayed. However, by using the history memory function, the past
waveform data (history waveforms including the current displayed waveform) stored in
the acquisition memory can be displayed when waveform acquisition is stopped. You
can display a specified history waveform from the data (up to 2048 waveforms, or the
number of triggers) stored in the acquisition memory. In addition, a certain history
waveform can be searched (see section 2.6).
The number of waveforms N that can be acquired and held as history waveforms varies
from 1 to 2048 depending on the record length, interleave mode setting, and model. If
the number of waveforms N that can be acquired and held is exceeded, the oldest
history waveform is cleared. The waveform currently displayed on the screen (newest
waveform) is counted as the 1st waveform, and up to N–1 waveforms in the past can be
displayed.
The following figure indicates an example when N = 1024.

Holds waveform data of the last 1024 triggers

2-16

Currently displayed waveform
(Select Record=0)

Select Record 0

Displays past waveforms
(when Select Record set in the range from 0 to –1023)

Select Record –25

IM 701730-01E

2.4 Waveform Acquisition and Display Conditions

Display Format <For the setup procedure, see section 8.1>

Splitting the Screen

The screen can be split evenly so that input waveforms and computed waveforms can be
easily viewed. The screen can be divided into the following:
Single (no division), Dual (two divisions), Triad (three divisions), Quad (four divisions),
and Hexa (six divisions)*

* Quad (four divisions) and Hexa (six divisions) are not available on the DL1720E.

Waveform Mapping

You can select one of the following for the mapping of the input channels to the divided
windows.
Auto: Waveforms whose input channels are turned ON are assigned in order from the top.
Fixed: Waveforms are assigned in order from the top regardless of whether the input

channels are turned ON or OFF.

User: Channels are assigned in order from the top to an arbitrary number of screen

divisions regardless of whether the input channels are turned ON or OFF.

Display Interpolation <For the setup procedure, see section 8.2>

In interpolation areas where less than 500 points of data exists in ten divisions along the
time axis (or less than 250 points in the zoom display section when waveforms are
zoomed in Main&Z1&Z2), a continuous waveform cannot be displayed because there
are not enough sampled points. In this case, the waveform is displayed by interpolating
between data points. You can select one of the following interpolation methods.

2

Explanation of Functions

Linear Interpolation

Linearly interpolates between two points.

Sine Interpolation

Generates interpolation data using the function
points using the resulting sine curve. Sine interpolation is suitable for observing sine
waves or similar waves.

Pulse Interpolation

Interpolates between two points in a step pattern.

sin x

, then interpolates between two

x

IM 701730-01E

Interpolation OFF

Displays discrete dots without performing interpolation.

2-17

2.4 Waveform Acquisition and Display Conditions

Accumulated Display <For the setup procedure, see section 8.3>

The display time of old waveforms can be set longer than the waveform update period,
so that newer waveforms appear overlapped (accumulated) on older waveforms.
Accumulated display is useful when observing jitters and temporary turbulence in
waveforms.
The following two modes are available.

• Persist: Accumulates waveforms using a single color for each channel.
The intensity is gradually reduced, and the waveform disappears after the
specified time.

• Color: Accumulates waveforms using eight colors indicating data frequency
information.

Zooming the Waveform <For the setup procedure, see section 8.4>

The displayed waveform can be expanded along the time axis. This function is useful
when the waveform acquisition time is set long and you wish to observe a particular
section of the waveform closely.
Zooming is not possible if the number of displayed points on the screen is less than or
equal to 50.

Zoomed waveforms of up to two locations can be displayed simultaneously (dual zoom).
Below are the combinations of the normal waveform and zoomed waveform displays
when the normal waveform display frame is denoted as Main and the two zoom
waveform display frames are denoted as Z1 and Z2.

<Main>

<Z2><Z1>

<Main>

<Z1> or <Z2>

<Z1>

<Z2>

<Z1>

or <Z2>

When displaying Main (main waveform) and Z1 (zoomed waveform), or Main and Z2
simultaneously, a zoom box indicating the zoom position is displayed within the main
waveform display frame. The center of the zoom area corresponds to the center of the
zoom box. For a display example, see “Display Example When Displaying Zoom
Waveforms” in section 1.3.

2-18

IM 701730-01E

2.4 Waveform Acquisition and Display Conditions

X-Y Waveform Display <For the setup procedure, see section 8.5>

The relationship between the levels of two input signals can be observed by taking the
level of the waveform assigned to the X-axis (horizontal axis) and the level of another
waveform (whose display is turned ON) assigned to the Y-axis (vertical axis).
Simultaneous observation of X-Y waveforms and normal T-Y waveforms (waveform
display using time axis and level) is possible.
You can use the X-Y waveform display function to measure the phase angle between
two sine wave signals. For example, the waveform that appears when two sine
waveforms are shown on the X-Y display is called a Lissajous waveform. From this
waveform, the phase angle can be obtained. For a display example, see “Display
Example When Displaying X-Y Waveforms” in section 1.3.

Lissajous waveform

Phase

angle 0°

Phase

angle 45°

Phase

angle 90°

2

Explanation of Functions

Frequency

ratio
(X:Y)

1:1 1:2

Snapshot <For the setup procedure, see section 8.6>

When the trigger mode is set to a mode other than Single or Single(N), the displayed
waveforms are periodically updated or displayed in roll mode (see page 2-7). Therefore
to hold the waveform you are currently viewing, you must stop waveform acquisition.
By using the snapshot function, you can temporarily hold the waveform (snapshot
waveform) that would be cleared when the screen is updated on the screen. The
snapshot waveform is displayed in white, allowing for easy comparison against the
updated waveform. The snapshot waveform is a screen image waveform. You can save,
load, and print the screen image data, but cursor measurements, automated
measurement of waveform parameters, zoom, and computation cannot be performed on
it.

Snapshot waveforms

1:3

Clear Trace <For the setup procedure, see section 8.6>

You can clear the snapshot waveform and restart averaging and accumulation using one
key operation. Pressing the SHIFT key followed by the SNAP SHOT key clears only the
snapshot waveforms.

IM 701730-01E

2-19

2.4 Waveform Acquisition and Display Conditions

Other Waveform Display Settings

Graticule <For the setup procedure, see section 8.7>

You can change the type of graticule that is displayed to suit your needs. For example,
you can show a grid on the screen or show only the frame.

Displaying Scale Values <For the setup procedure, see section 8.8>

The upper and lower limits (scale values) of the vertical and horizontal axis of each
channel can be displayed. For a display example, see “Normal Display Screen” in
section 1.3.

Displaying Waveform Labels <For the setup procedure, see section 8.9>

You can arbitrarily set a waveform label for the waveforms input on each channel using
up to eight characters. For a display example, see “Normal Display Screen” in section

1.3.

Translucent Display <For the setup procedure, see section 8.10>

The dialog boxes that appear during setup operation become translucent allowing the
contents underneath the dialog boxes to be seen.

2-20

IM 701730-01E

2.5 Waveform Computation

Addition, Subtraction, and Multiplication <For the setup procedure, see section 9.2>

Addition, subtraction, and multiplication can be performed between waveforms of CH1
and CH1 to CH4; CH2 and CH1 to CH4; CH3 and CH1 to CH4 or Math1; and CH4 and
CH1 to CH4 or Math1 (or between CH1 and CH1 to CH2, or CH2 and CH1 to CH2 on
the DL1720E). The computed result becomes the Math1 or Math2 waveform (or the
Math1 waveform for the DL1720E).
Addition (+) and subtraction (–) are useful functions when comparing waveforms against
a standard signal, checking the signal logic, or comparing the phase. Multiplication (_) is
a useful function when applying a voltage signal and a current signal and checking the
power waveform.

2

Explanation of Functions

Subtraction (–)Addition (+)

Multiplication (×)

Binary Computation <For the setup procedure, see section 9.3>

The selected waveform can be converted to a digital waveform of 0s and 1s with respect
to the specified threshold level. This computation can be performed on the waveforms of
CH1 to CH4 and Math1 (or CH1 to CH2 on the DL1720E).

Inversion <For the setup procedure, see section 9.4>

The voltage axis can be inverted on the display by multiplying the measured data by -1.
This computation can be performed on the waveforms of CH1 to CH4 and Math1 (or
CH1 to CH2 on the DL1720E).

Differentiation (Diff) and Integration (Integ) <For the setup procedure, see section 9.5>

Differentiates or integrates the waveform of the selected channel. This computation can
be performed on the waveforms of CH1 to CH4 and Math1 (or CH1 to CH2 on the
DL1720E).

Phase Shift <For the setup procedure, see section 9.8>

You can shift the phase of the displayed waveforms on CH1 to CH4 (or CH1 and CH2 on
the DL1720E), and use the phase-shifted data in calculations.

Scaling the Computed Waveform <For the setup procedure, see section 9.2>

Normally, auto scaling is performed when computed waveforms are displayed. However,
you can also select manual scaling.
When auto scaling is used, the vertical center line level
frame are automatically determined from the computed waveform, and the computed
waveform is displayed.
When manual scaling is used, you can set the center and sensitivity as necessary.

1. Voltage in the case of voltage waveforms.

2. Voltage per division in the case of voltage waveforms.

IM 701730-01E

1

and sensitivity2 of the display

2-21

2.5 Waveform Computation

Power Spectrum Display <For the setup procedure, see section 9.6>

The power spectrum of the input signal can be computed and displayed by taking the
FFT (Fast Fourier Transform). This is useful when you wish to check the frequency
distribution of the input signal.

Power spectrum waveform

You can select the time window from Rectangular, Hanning, and Flattop.
The rectangular window is best suited to transient signals, such as impulse waves, which
attenuate completely within the time window.
The Hanning and flattop windows allow continuity of the signal by gradually attenuating
the parts of the signal located near the ends of the time window down to the 0 level.
Hence, it is best suited to continuous signals. With the Hanning window, the frequency
resolution is high compared to the flattop window. However, the flattop window has a
higher level of accuracy. When the waveform being analyzed is a continuous signal,
select the proper window for the application.
FFT is performed on 1000 or 10000 points of measured data. The data is converted to
half the specified number of points and displayed.

Window Integral Power spectrum

Rectangular

Sine wave

window

T

Hanning window

T

t

Flattop window

T

Rectangular window:
Hanning window:
Flattop window:

W(t)=u(t)–u(t–T) U(t) : Step function
W(t)=0.5–0.5cos(2π )
W(t)={0.54–0.46 cos(2π )}

T

T

T

t

T

sin{2π(1–2t/T)}

t

T

2π(1–2t/T)

FFT Function

Given that the complex function resulting after the FFT is G = R + jI, the power spectrum
can be expressed as follows:

DC component

2

( )

10 log

R

+ I

AC component

2

10 log

2

R2 + I

( )

2

R: Real Part
I: Imaginary Part
Reference value (0 dB) of the logarithmic magnitude (Log mag): 1 Vrms

2

2-22

IM 701730-01E

2.6 Analyzing, and Searching Waveforms

Displaying History Waveforms <For the setup procedure, see section 10.1>

Past waveform data (history waveforms) stored in the acquisition memory can be
displayed when waveform acquisition is stopped. You can display a specified history
waveform from the data (up to 2048 waveforms, or the number of triggers) stored in the
acquisition memory.
The number of waveforms N that can be acquired and held as history waveforms varies
from 1 to 2048 depending on the record length and interleave mode settings. The
waveform currently displayed on the screen (newest waveform) is counted as the 1st
waveform, and up to N-1 waveforms in the past can be displayed.

History Search

You can search history waveforms that meet specified conditions when waveform
acquisition is stopped.

Zone Search <For the setup procedure, see section 10.2>

You can search history waveforms that pass or do not pass a specified search zone.

History waveforms

Specified search zone

2

Explanation of Functions

Selected Record No. 0

Detects waveforms that pass
through the specified search zone

Selected Record No. –25

Waveform Parameter Search <For the setup procedure, see section 10.3>

You can search history waveforms that meet or do not meet the specified search
parameter conditions.

History waveforms

Search parameter: P-P
Status of the search parameters

P-P

Selected Record No. 0

P-P

Selected Record No. –28

Search range

for the searched waveform: OUT

Detects this section

IM 701730-01E

2-23

2.6 Analyzing, and Searching Waveforms

Search and Zoom <For the setup procedure, see section 10.4>

When waveform acquisition is stopped, you can search the displayed waveforms (within
the display record length, see appendix 1) and display the waveforms that match the
search conditions expanded on the screen.

Edge Search

Search is performed on the number of times the waveform goes above or below (rising
or falling) a specified level.

Search condition Edge: rising edge and detection count: 2

Search start point

Detection position

Hysteresis

Specified level

Displays the detected section expanded
in the zoom waveform display frame

Serial Pattern Search

Search is performed on whether the serial status pattern of the waveform (status pattern
of the waveform that changes over time) is the same as the status pattern set in
advance. You can also set whether the timing used to detect the waveform status (up to
sixty-four statuses) is synchronized to a selected clock signal or is performed at certain
time intervals.

Condition Clock channel: CH1, slope on which to check the status: rising,

and searched waveform: CH2

Level

CH1

2-24

High level

Low level

CH2

CH2 status

Previously specified pattern

H: High level
L: Low level
X: Don’t care

LHLL L

Detects the section that is the same as the specified pattern.

Displays the waveform expanded in the zoom waveform display frame

H

LL L

H

L

H

X

H

L

L

L

IM 701730-01E

2.6 Analyzing, and Searching Waveforms

Parallel Pattern Search

Search is performed on whether the parallel status pattern of the waveform (each status
pattern at the same point in time) is the same as the status pattern set in advance. You
can also set whether the waveform status is detected in sync with the selected clock
signal and whether statuses of all waveforms are detected.

2

Explanation of Functions

Conditions Clock channel: None, CH1 = L, CH2 = L, CH3* = H,

CH1

CH2

CH3*

CH4*

LH L L L

CH1
CH2
CH3*
CH4*

Conditions: Clock channel: CH1, falling slope, CH2: L, CH3*: H, CH4* L

CH1

HHHHLLLL

* CH3 and CH4 not available on the DL1720E.

CH4* = L, Math1: X, Math2: X

H

HLL

H

H: High level

L

L: Low level

HLLH

X: Don’t care

Detects this position and displays
the waveform expanded in the zoom
waveform display frame

CH2

CH3*

CH4*

CH2
CH3*
CH4*

HHHHLLLL

HLL

* CH3 and CH4 not available on the DL1720E.

L

H: High level

HLLH

L: Low level

Detects this position and displays the
waveform expanded in the zoom
waveform display frame

IM 701730-01E

2-25

2.6 Analyzing, and Searching Waveforms

Pulse Width Search

Search is performed on whether the pulse width of the waveform above or below a
specified level is shorter or longer than the specified determination time.

Pulse<Time

T1<Pulse<T2

T, T1, T2: Specified determination time

T

T2

T1

Pulse>Time

T

Time Out

T

: Center position when zooming
: Start point for next search

Auto Scroll

The zoom position automatically moves (auto scroll) in the specified direction. You can
confirm the zoomed waveform and stop the scroll operation at an arbitrary position.

2-26

IM 701730-01E

2.6 Analyzing, and Searching Waveforms

Cursor Measurements <For the setup procedure, see section 10.5>

Cursors can be placed on the displayed waveform (within the display record length. See
appendix 1) and various types of measured values at the cross point of the cursor and
waveform can be displayed. Four types of cursors are available.

Horizontal Cursors

Two broken lines (horizontal cursors) are displayed on the horizontal axis (X-axis). The
Y-axis values at the cursor positions can be measured. The level difference between
cursors can also be measured.

Vertical Cursors

Two broken lines (vertical cursors) are displayed on the vertical axis (Y-axis). The time
(X-axis values) from the trigger point to each vertical cursor and the time difference
between the vertical cursors can be measured. In addition, the signal level (Y-axis value)
at each cursor position and the level difference between the cursors can be measured.

Marker Cursors

Four markers are displayed on the selected waveform. The level (Y-axis value) at each
marker, the time (X-axis value) from the trigger position, and the level difference and
time difference between markers can be measured.

Angle Cursors (Degree)

Measurements can be made by converting the time axis values into angles. The zero
point (position of reference cursor Ref1) and the end point (position of the reference
cursor Ref2) are set on the X-axis and an angle (reference angle) is assigned to the
width of Ref1 and Ref2. The positions of the two angle cursors (Cursor1 and Cursor2)
can be converted into angles from the specified reference angle and measured.

2

Explanation of Functions

Both Horizontal and Vertical Cursors (H&V)

Displays Horizontal and Vertical cursors simultaneously. H&V cursors can be used on
products with firmware version 2.09 or later.

When using vertical cursors

Cursor 1

Cursor 2

Value measured with the cursor Values measured with the cursor

When using marker cursors

Marker 3Marker 1

Marker 2

Marker 4

IM 701730-01E

2-27

2.6 Analyzing, and Searching Waveforms

Automated Measurement of Waveform Parameters

Automated Measurement of Waveform Parameters <For the setup procedure, see
section 10.6>

You can automatically perform measurement on channels of specified rise times, pulse
widths, and other parameters. Up to twenty-seven items can be measured. Up to twelve
parameters from the selected parameters of all the channels can be displayed.
Measurement is performed on the data stored in the acquisition memory.

Statistical Processing <For the setup procedure, see section 10.7>

You can perform statistical processing on the automatically measured values above.
The following five statistics can be determined on the two measured values of automated
measurement parameters.

• Maximum value (Max)

• Minimum value (Min)

• Average value (Avg)

• Standard deviation (Sdv)

• Number of measured values used in the statistical processing (Cnt)

Measurement range

Automated measurement values of statistics

Statistical processing results

The following three statistical processing methods are available.

• Normal Statistical Processing

Statistical processing is performed on all acquired waveforms while acquiring waveforms.

• Statistical Processing by Cycle

The displayed waveform is separated into automatically determined cycles, and
statistical processing is performed on the measured values within each cycle.
Statistical processing is performed from the oldest data of the displayed waveforms.

When Own is selected as the waveform used to determine the cycle

CH1

Applicable cycles

CH2

Applicable cycles

CH3*

Applicable cycles

In the left figure, the number of
cycles of the channel whose
cycle is the slowest (CH3) is 4.
Therefore, statistical processing
is performed on the four oldest
cycles of data for CH1 and CH2,
also. The rest of the data is not
used in statistical processing.

* CH3 not available on the DL1720E.

2-28

• Statistical Processing of History Waveforms

Automated measurement is performed on the history waveforms in the selected range
and statistical processing is performed. Statistical processing is performed from the
oldest data.

IM 701730-01E

2.6 Analyzing, and Searching Waveforms

Automated Measurement of Waveform Parameters on Dual Areas <For the setup
procedure, see section 10.8>

You can specify two areas and perform automated measurement of waveform
parameters on each area. You can also perform computation on the parameters
determined in the two areas. Per cycle statistical processing is not possible.

GO/NO-GO Determination <For the setup procedure, see sections 10.9 to 10.11>

The GO/NO-GO function is useful when you want to inspect signals and track down
abnormal symptoms on a production line making electronic equipment. The NO (NO­GO) condition is set (whether the waveform enters the previously specified range), and a
certain operation is performed when the condition is met.
There are two methods in making the determination: a method in which a waveform zone
is set on the screen and a method in which a waveform parameter range is specified.
You can select from various actions for the NO-GO operation including sounding of a
buzzer, saving of waveform data or screen image data, printing of screen image data, or
transmission of e-mail messages (when the Ethernet interface option is installed).
Also, you can output determination results signals externally on the GO/NO-GO
determination output terminal.

2

Explanation of Functions

IM 701730-01E

2-29

2.7 Communication

Communication Using Commands (GP-IB, USB, or Ethernet)
<For the setup procedure, see the Communication Interface User’s Manual CD-ROM>

The instrument comes standard with a GP-IB and a USB interface. An Ethernet interface
is available as an option. Using communication commands, you can output waveform
data to a PC for data analysis or control the instrument using an external controller to
carry out waveform measurements.

Communication

interface

DL1700E

PC

Saving and Loading Data from a Network Drive (FTP Client)
<For the setup procedure, see section 13.3>

As with the built-in storage medium and external USB devices, waveform and setup data
can be saved and loaded and screen image data can be saved to an FTP server* on the
network.

* PC or workstation on which the FTP server function is running.

Ethernet

FTP server

DL1700E

Printing on a Network Printer (LPR Client) <For the setup procedure, see section 13.4>

The screen image can be printed on a network printer in the same way as the built-in
printer (optional) or a printer connected via the USB PERIPHERAL interface.

Ethernet

2-30

DL1700E

Printer

IM 701730-01E

2.7 Communication

Transmitting E-Mails (SMTP Client) <For the setup procedure, see section 13.5>

Information from the instrument can be transmitted periodically in an e-mail message to
a specified mail address. You can also transmit information such as the trigger time in an
e-mail message as an action for the GO/NO-GO determination or action-on-trigger.

Ethernet

Mail

2

Explanation of Functions

DL1700E

PC

Accessing the instrument from a PC or Workstation (FTP Server)
<For the setup procedure, see section 13.6>

The instrument can be accessed from an FTP client on the network, and the files on the
built-in storage medium of the instrument or external USB device can be retrieved.

* PC or workstation on which the FTP client function is running.

Ethernet

DL1700E

PC/Workstation

Web Server <For the setup procedure, see section 13.7>

The instrument can function as a Web server. By displaying the Web page of the
DL1700E, file transfer, monitoring of displayed waveforms, basic DL1700E setup
operation, and the retrieval operation of waveform data are possible.

Ethernet

DL1700E

PC

Using the Instrument as a Network Drive <For the setup procedure, see section 13.11 >

The external storage medium of the instrument can be used as a network drive from a
PC running Windows XP.

IM 701730-01E

2-31

2.8 Other Useful Functions

Entering Values and Text Using the USB Keyboard
<For the setup procedure, see section 4.3>

You can connect a USB keyboard and enter file names and comments. In addition, the
functions of each key on the front panel of the instrument are assigned to the keys on the
keyboard. Thus, the keyboard can be used to carry out operations that are the same as
the key operations on the instrument. For the key assignments, see appendix 5.

USB PERIPHERAL

USB keyboard

Operating the Instrument Using a USB Mouse
<For the setup procedure, see section 4.3>

You can use a USB mouse to operate the instrument as you would using the front panel
keys. In addition, you can point to a desired item on a menu and click the item. This is
analogous to pressing a soft key corresponding to a menu and pressing the SELECT
key.

DL1700E

USB PERIPHERAL

USB mouse

DL1700E

Initialization <For the setup procedure, see section 4.4>

You can perform initialization using a simple panel key operation. However, certain
settings (communication settings and setting information saved with the store/recall
function) are not initialized.
To initialize the settings excluding the date/time setting (display ON/OFF is initialized) to
their factory default conditions, turn ON the power while holding down the RESET key.
Release the RESET key after a beep is heard.

Auto Setup <For the setup procedure, see section 4.5>

This function automatically sets the voltage axis, time axis, trigger settings, and other
settings to suit the input signal. This is useful when the characteristics of the input signal
are unknown. However, the auto setup function may not work depending on the input
signal.

Preset <For the setup procedure, see section 5.7>

This function sets the V/div, input coupling, trigger level, and other settings to values that
are suitable for CMOS and ECL signals (or arbitrary settings). You can also
automatically set to the optimum values for the current probe 700937, 701930, 701931,
and 701932 (sold separately).

2-32

IM 701730-01E

Printing Screen Images <For the setup procedure, see chapter 11>

Screen images can be printed on the built-in printer (option), USB printer, or network
printer (when the Ethernet interface option is installed).

Ethernet

Built-in printer

USB PERIPHERAL

2.8 Other Useful Functions

2

Explanation of Functions

Printer

DL1700E

Saving and Loading Data from the Storage Medium
<For the setup procedure, see chapter 12>

The DL1700E allows various data to be stored to and loaded from the following storage
media.

• Floppy disk or PC card

• External USB storage (MO disk drive, hard disk drive, flash memory)

• Network drive (when the Ethernet interface option is installed)

USB PERIPHERAL

USB device

Floppy disk or PC card

DL1700E

Printer

Ethernet

Network drives

IM 701730-01E

PC

Saving and Loading Setup Data, Waveform Data, and Snapshot Waveforms
<For the setup procedure, see sections 12.5 to 12.7>

The setup data, waveform data, and snapshot waveforms can be saved to or loaded
from a selected storage medium.

Saving Screen Image Data and Displaying the Thumbnails of the Stored Screen
Image Data <For the setup procedure, see sections 12.9 and 12.10>

The screen image data can be stored to a selected storage medium. The data can be
stored in TIFF, BMP, PostScript, PNG, and JPEG formats allowing the data to be pasted
onto a document created with a DTP application. In addition, the thumbnails (reduced
and simplified images) of the screen image data saved to the storage medium can be
displayed on the instrument screen. This feature is useful for checking the contents of
the stored screen image data.

2-33

2.8 Other Useful Functions

Saving Automated Measurement of Waveform Parameter Values <For the setup
procedure, see section 12.8>

You can save the automatically measured waveform parameter values to a storage
medium.

Operating the instrument Using a Free Software Program

The instrument can be controlled from a PC using Wirepuller, a free software program,
when connected via the GP-IB, USB, or Ethernet interface. The software program can be
downloaded from the following Web pages.

• English version http://www.yokogawa.com/tm/tm-softdownload.htm

• Japanese version http://www.yokogawa.co.jp/Measurement/F-SOFT/

2-34

IM 701730-01E

Chapter 3 Making Preparations for Measurements

3.1 Handling Precautions

Safety Precautions

If you are using this instrument for the first time, make sure to thoroughly read the safety
precautions given on page vi.

Do Not Remove the Case

Do not remove the instrument from the case. Some sections inside the instrument have
high voltages and are extremely dangerous. For internal inspection or adjustment,
contact your nearest YOKOGAWA representative.

Unplug If Abnormal Behavior Occurs

If you notice smoke or unusual odors coming from the instrument, immediately turn OFF
the power and unplug the power cord. If such an irregularity occurs, contact your
YOKOGAWA dealer.

Do Not Damage the Power Cord

Nothing should be placed on the power cord. The cord should be kept away from any
heat sources. When unplugging the power cord from the outlet, never pull by the cord
itself. Always hold and pull by the plug. If the power cord is damaged, contact your
dealer for replacement. Refer to page iii for the part number when placing an order.

3

Making Preparations for Measurements

General Handling Precautions

Do Not Place Objects on Top of the Instrument

Never place other instruments or objects containing water on top of the instrument,
otherwise a breakdown may occur.

Do Not Apply Shock to the Input Section

Vibration or shock to the input connectors or probes may turn into electrical noise and
enter the instrument via the signal lines.

Do Not Damage the LCD

Since the LCD screen is very vulnerable and can be easily scratched, do not allow any
sharp objects near it. Also it should not be exposed to vibrations and shocks.

Unplug during Extended Non-Use

Unplug the power cord from the outlet.

IM 701730-01E

3-1

3.1 Handling Precautions

When Carrying the Instrument

Remove the power cord and connecting cables. Always carry the instrument by the
handle on the top (as shown below), or carry it with both hands.

Cleaning

When cleaning the case or the operation panel, first remove the power cord from the AC
outlet. Then, wipe with a dry, soft, clean cloth. Do not use volatile chemicals since this
might cause discoloring and deformation.

3-2

IM 701730-01E

3.2 Installing the Instrument

Installation Conditions

Install the instrument in a place that meets the following conditions.

Flat, Even Surface

Install the instrument in the correct orientation on a stable, horizontal surface. The
recording quality of the built-in printer (optional) may be hindered when the instrument is
used in an unstable place.

Well-Ventilated Location

Ventilation holes are located on the bottom of the instrument. In addition, there are
exhaust holes for the cooling fan on the rear panel. To prevent internal overheating,
allow for enough space around the instrument (see the figure below) and do not block
the ventilation and exhaust holes. If a printer comes with your DL1700E, allow extra
space for operation and do not place objects on top of the printer.

3

Making Preparations for Measurements

10 cm or more

10 cm or

more

5cm or

more

5cm or
more

Ambient Temperature and Humidity

Ambient temperature: 5-40°C
Ambient humidity: 20 to 80% RH (when the printer is not used)

35 to 80% RH (when the printer is used)

However, no
condensation
may be present

Note

• To ensure high measurement accuracy, operate the instrument in the 23 ±2°C temperature
range and 55 ±10% RH.

• Condensation may occur if the instrument is moved to another place where the ambient
temperature is higher, or if the temperature changes rapidly. In such cases, allow the
instrument adjust to the new environment for at least an hour before using it.

IM 701730-01E

3-3

3.2 Installing the Instrument

Do not install the instrument in the following places.

• In direct sunlight or near heat sources.

• Where an excessive amount of soot, steam, dust, or corrosive gas is present.

• Near strong magnetic field sources.

• Near high voltage equipment or power lines.

• Where the level of mechanical vibration is high.

• On an unstable surface.

Installation Position

Place the instrument in a horizontal position or inclined position using the stand (see the
figure below). When using the stand, pull it forward until it locks. To retract it, push on the
inside and set the stand back to its original position. When placing the instrument on its
rear panel, use the rear panel stand.

Rubber Feet

If the instrument is installed in a tilted position as shown in the figure above, rubber
stoppers can be attached to the feet to prevent the instrument from sliding. Four rubber
feet are included in the package.

3-4

IM 701730-01E

3.3 Connecting the Power Supply and Turning the Power Switch ON and OFF

Before Connecting the Power

Make sure that you observe the following points before connecting the power. Failure to
do so may cause electric shock or damage to the instrument.

WARNING

• Before connecting the power cord, ensure that the source voltage matches the
rated supply voltage of the instrument and that it is within the maximum rated
voltage of the provided power cord.

• Connect the power cord after checking that the power switch of the instrument is
turned OFF.

• To prevent the possibility of electric shock or fire, be sure to use the power cord
for the instrument that was supplied by YOKOGAWA.

• Make sure to perform protective earth grounding to prevent electric shock.
Connect the power cord to a three-prong power outlet with a protective earth
terminal.

• Do not use an extension cord without protective earth ground. Otherwise, the
protection function will be compromised.

• Use an AC outlet that complies with the power cord provided and securely
connect the protective grounding. If such an AC outlet is unavailable and
protective grounding cannot be furnished, do not use the instrument.

3

Making Preparations for Measurements

Connecting the Power Cord

1. Check that the main power switch and power switch are turned OFF (see next
page).

2. Connect the power cord plug to the power connector on the rear panel. Use the
power cord that came with the package.

3. Connect the other end of the cord to an outlet that meets the conditions below. The
AC outlet must be of a three-prong type with a protective earth ground terminal.
The AC outlet must be of a three-prong type with a protective earth ground terminal.

Rated supply voltage 100 to 120 VAC/220 to 240 VAC
Permitted supply voltage range 90 to 132 VAC/198 to 264 VAC
Rated supply voltage frequency 50/60 Hz
Permitted supply voltage frequency range 48 to 63 Hz
Maximum power consumption (when using the printer) 200 VA
* The instrument can use a 100-V or a 200-V system for the power supply. Check that the voltage

supplied to the instrument is less than or equal to the maximum rated voltage of the provided
power cord (see page ii) before using it.

Main power switch

3-prong outlet

IM 701730-01E

Power cord
(included in the package)

3-5

3.3 Connecting the Power Supply and Turning the Power Switch ON and OFF

Turning the Main Power Switch ON and OFF

The main power switch is located in the right center of the rear panel. Press the switch
on the ON side to turn the power ON, and on the OFF side to turn the power OFF.

U

P

S

E

B

R

I

P

H

L

E

I

N

R

K

A

L

A

C

T

U

S

B

I

S

M

1

-

A

N

2

0

0

M

A

IN

1

0

P

0

-1

O

/2

W

2

2

0

E

0

V

R

-2

2

O

5

4

F

0

0

F

V

V

5

A

A

0

M

/6

C

0

A

F

H

U

X

z

S

E

2

5

0

V

T

4

A

O

N

E

X

T

C

E

X

L

T

O

T

C

T

K

R

R

IN

IG

IG

IN

4

G

A

0

T

V

E

p

IN

k

1

M

GO/
NO-G

O

A

U

T

L

T
)

P

R

O

B

E

P

O

MAIN POWER

OFF

Turning the Power Switch ON and OFF

Items to Be Checked before Turning ON the Power

• That the instrument is properly installed: 3.2 Installing the Instrument

• That the power cord is properly connected: Connecting the Power Cord (page 3-5)

ON

Power Up Operation

Turning the Power Switch ON and OFF

The power switch is located in the lower left corner of the front panel. The power switch
is a push button. Press once to turn it “ON” and press again to turn it “OFF.”

OFF ON

Self-test and calibration start automatically when the power switch is turned ON. If the
check results are satisfactory, the normal waveform display screen will appear.

Note

• Allow at least ten seconds after turning OFF the main power switch and the power switch
before turning it ON again.

• If self-test and calibration do not start when the power is turned ON, or if the normal waveform
display screen does not appear, turn OFF the main power switch and the power switch and
check the following points.

• That the power cord is plugged in properly.

• That the correct voltage is coming to the power outlet (see page 3-5).

• That the power fuse has not blown -> See section 16.5.
If the instrument still fails to power up when the main power switch and the power switch is
turned ON after checking these points, contact your nearest YOKOGAWA dealer.

3-6

IM 701730-01E

3.3 Connecting the Power Supply and Turning the Power Switch ON and OFF

Warm Up and Calibration

• To ensure accurate measurements, allow the instrument to warm up for at least thirty
minutes after turning ON the power switch.

• After warm-up is complete, perform calibration (see section 4.6).

Power Down Operation

Current settings are stored immediately before the power is turned OFF or when the
power cord is unplugged. Therefore, the next time the power is turned ON, the
waveforms are displayed using the previous settings.

Note

3

Making Preparations for Measurements

A lithium battery is used to retain the setup parameters. When the lithium battery voltage falls
below a certain level, a message is displayed on the screen (see section 16.2) when the
power switch is turned ON. If this happens, you must quickly have the lithium battery
replaced. The user cannot replace the battery. Contact your nearest YOKOGAWA dealer.
For information regarding battery life, see section 16.6.

IM 701730-01E

3-7

3.4 Connecting the Probe

Signal Input Terminal

Connect the probe (or other input cable such as the BNC cable) to any of the input
terminals (four terminals marked as CH1 to CH4 on the DL1735E/DL1740E/DL1740EL
or two terminals marked CH1 and CH2 on the DL1720E) at the bottom section of the
front panel. The input impedance is 1 MΩ ±1.0% and approximately 20 pF or 50 Ω

1.0%.

• The maximum input voltage for 1-MΩ input is 400 V (DC + ACpeak) or 282
Vrms when the frequency is 1 kHz or less. Applying a voltage exceeding either
of the two values can damage the input section. If the frequency is above 1 kHz,
damage may occur even when the voltage is below this value.

• The maximum input voltage for 50-Ω input is 5 Vrms or 10 Vpeak. Applying a
voltage exceeding either of the two values can damage the input section.

DL1735E/DL1740E/DL1740EL

_

<

1M /20pF 400Vpk CAT

CAUTION

_

<

50 5Vrms,10Vpk

CH1 CH2 CH3 CH4

DL1720E

_

<

1M /20pF 400Vpk CAT

CH1 CH2

_

<

50 5Vrms,10Vpk

Precautions to Be Taken When Connecting Cables

• When connecting a probe to the instrument for the first time, perform phase correction
of the probe as described in section 3.5, “Compensating the Probe (Phase
Correction).” Failure to do so will cause unstable gain across different frequencies,
thereby preventing correct measurement. Perform the phase correction on each
channel to which a probe is to be connected.

• Note that if the object being measured is directly connected to the instrument without
using a probe, correct measurements may not be possible due to loading effects. Use
caution when formatting a storage medium.

_

<

1M /20pF 40Vpk

EXT.

3-8

IM 701730-01E

Probes

3.4 Connecting the Probe

Specifications of the Probe (Model 700988) That Comes Standard (after Calibration)

Item Description Requirement

When attenuation is 10:1 When attenuation is 1:1

Input resistance/ 10 MΩ 2%, approx. 14 pF 1 MΩ 1.0%, approx. 150 pF When used on the
capacity instrument
Attenuation 10:1±3% _ When used on the

instrument

Frequency range DC to 400 MHz DC to 6 MHz When used on the

instrument

Rise time Within 900 ps Within 58 ns When used on the

instrument
Maximum input 600 V (DC + ACpeak) or * _
voltage 424 Vrms and frequencyis

100 kHz or less
Connector type BNC BNC _
Total length 1.5 m 1.5 m _

* When using the instrument with the attenuation set to 1:1, use the probe at a voltage less than or

equal to the maximum input voltage of the instrument.

Miniature Passive Probe (701941) Specifications after Probe Phase Correction

(On models with the /EX2 or the /EX4 option, 701941 passive probes are provided in
place of 700988 passive probes.)

Item Specifications Conditions

Input resistance/capacity 10 MΩ ±2% / approx. 10 pF When used on the DL1700E
Attenuation 10:1 ±3% When used on the DL1700E
Frequency range DC to 500 MHz When used on the DL1700E
Rise time Within 700 ps When used on the DL1700E
Maximum input voltage 400 Vrms* 500 kHz or less

For the maximum input voltage when 500
kHz is exceeded, see the manual that

comes with the probe.
Connector type BNC _
Cable length 1.2 m _

* This probe complies with the following measurement categories of IEC 61010-031.

Measurement category I 400 Vrms (transient overvoltage: 1250 V)
Measurement category II 300 Vrms

3

Making Preparations for Measurements

Precautions to Be Taken When Using Probes Other Than Those Provided with the
Instrument

• When measuring a signal containing frequency components near 500 MHz, use a

probe with a frequency range of 500 MHz or higher.

• Note that measured values cannot be displayed correctly when using a probe with an

attenuation other than 1:1, 10:1, 100:1, and 1000:1.

Setting the Probe Attenuation

Follow the procedures given in section 5.5 and set the attenuation/current-to-voltage
conversion ratio of the instrument according to the probe attenuation/current-to-voltage
conversion ratio. Correct measured values can be displayed only if the setting is correct.

When Using the FET Probe, Current Probe, or Differential Probe

When using FET probes (700939), current probes (700937, 701930, 701931, 701932, or

701933), or differential probes (701920 or 701922) made by YOKOGAWA, use the
probe power supply on the rear panel of the instrument.

CAUTION

Do not use the probe power supply terminals on the rear panel of the instrument
for purposes other than supplying power to the FET probe (700939), current
probes (700937, 701930, 701931, 701932, or 701933), or differential probes
(701920, or 701922). Doing so may damage the instrument or the device
connected to them.

IM 701730-01E

3-9

3.4 Connecting the Probe

When Using the FET Probe, Current Probe, or Differential Probe

When connecting FET probes (700939), current probes (700937, 701930, 701931,
701932, or 701933), or differential probes (701920 or 701922) to the probe power supply
terminal on the rear panel, make sure that the current does not exceed the range shown
below. Otherwise, the instrument operation may become unstable due to the activation
of the excessive current protection circuit of the power supply.

DL1735E/DL1740E/
DL1740EL

EXT CLOCK IN
EXT TRIG IN
TRIG GATE IN

<

_

40Vpk 1M

TRIG OUT
(TTL )

PROBE POWER

A

B

GO/
NO-GO

( 12V DC )

When using the current probe (700937, 701930, 701931, 701932, or 701933), the
number of probes that can be used is limited by the current generated by the device
under measurement (current measured by the current probe). The characteristics of the
measured current versus the current consumption of an active probe that can be
connected to the instrument are shown below.

Current probe (700937)

250

200

150

100

50

0

-50

-100

-150

-200

Current consumption [mA]

-250

-15 -10 -5 0 5 10 15

Measured current [A]

DL1720E

C

D

Positive
current

Negative
current

DC
AC (f=50 Hz)

TRIG OUT
(TTL )

GO/

Given terminals A through D

NO-GO

A

PROBE POWER

B

( 12V DC )

(Consumption current of A) +
(consumption current of B) ≤ 400 mA

(Consumption current of C) +
(consumption current of D) ≤ 400 mA

(Total consumption current of
A through D) ≤ 600 mA

Current probe (701930)

400

300

200

100

0

-100

-200

-300

Current consumption [mA]

-400

-150 -100 -50 0 50 100 150

Measured current [A]

Positive
current

Negative
current

DC
AC (f=50 Hz)

3-10

Current probe (701931)

500

400

300

200

100

0

-100

-200

-300

Current consumption [mA]

-400

-500

-500

-400

-300

-100

-200

Measured current [A] Measured current [A]

Calculate the consumption current of the FET probe (700939) and the differential probe
(701920 or 701921) at 125 mA maximum for both positive and negative polarities.

Current probe (701932/701933)

600

500

400

300

Positive
current

Negative
current

0

100

300200

400 500

DC
AC (f=50 Hz)

200

100

0

-100

-200

-300

-400

Current consumption [mA]

-500

-600

-30 -20 -10 0 10 20

Positive
current

Negative
current

30

DC
AC (f=50 Hz)

IM 701730-01E

3.5 Compensating the Probe (Phase Correction)

Procedure

CAUTION

Do not apply external voltage to the probe compensation signal output terminal.
Doing so can damage the internal circuits.

1. Turn ON the power switch.

2. Connect the probe to the input terminal to which the signal is to be applied.

3. Connect the tip of the probe to the probe compensation signal output terminal and

the ground wire to the functional ground terminal.

4. Perform auto setup according to the procedures given in section 4.5.

5. Insert a flat-head screwdriver to the phase correction hole and turn the variable

capacitor to make the displayed waveform a correct rectangular wave.

3

Making Preparations for Measurements

Explanation

Phase correction hole

Probe compensation signal
output terminal

Functional ground terminal

Necessity of Phase Correction of the Probe

When using the oscilloscope with a probe, the probe phase must be corrected by
adjusting the variable capacitor inside the probe so that the gain is constant relative to
the frequency. Measurements will not be accurate unless this adjustment is made,
therefore you should make sure to perform this phase correction when using the probe
for the first time.

The input capacitance differs depending on the oscilloscope. It can also vary slightly
from channel to channel, even on the same oscilloscope. Even if the phase has been
previously corrected, you must perform the correction again if you move the probe to a
new oscilloscope or a different channel.

Probe Compensation Signal

The probe compensation signal output terminal outputs the following rectangular wave
signal.
Frequency: Approximately 1 kHz
Amplitude: Approximately 1 V

IM 701730-01E

3-11

3.5 Compensating the Probe (Phase Correction)

Differences in the Waveform due to the Phase Correction of the Probe

Correct waveform Over compensated

(the gain in the high
frequency region is up)

Under compensated
(the gain in the high
frequency region is low)

3-12

IM 701730-01E

3.6 Setting the Date and Time

Procedure

CLEAR
TRACE

HISTORY

MEASURE

CURSOR

SETUP

DISPLAY

CH

1

CH

2

CH

3

CH

4

POWER

MENU MENU

X - Y

COPY

IMAGE SAVE

VERTICAL

PRESET

V DIV TIME DIV

SNAP

ESC

SHOT

HELP

located above the soft keys.

• In the procedural explanation below, the term jog

• To exit the menu during operation, press ESC

MISCFILE

GO/NO-GO

HORIZONTAL

SEARCH

ZOOM

MATH

SHIFT

PHASE

ACQ START/ STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

SELECTRESET

shuttle & SELECT refers to the operation of
selecting/setting items and entering values using
the jog shuttle and SELECT and RESET keys.
For details on this operation, see sections 4.1 and

4.2.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

Displaying the Date/Time Setup Dialog Box

1. Press the MISC key.

2. Press the System Config soft key. The System Cnfg menu appears.

3. Press the Date/Time soft key. The Date/Time setup dialog box appears.

3

Making Preparations for Measurements

Turning the Date/Time Display ON and OFF

4. Use jog shuttle & SELECT to set Display to ON or OFF.

Selecting the Date/Time Setting Method

5. Use jog shuttle & SELECT to set the Type to Manual or SNTP.

Turning the Date/Time display ON and OFF
Selecting the Manual or SNTP method for the

Date/Time display settings.

IM 701730-01E

3-13

3.6 Setting the Date and Time

• When Selecting Manual (Manually Enter the Date and Time)

6. Use jog shuttle & SELECT to set the Year.

7. Likewise, set the Month, Day, Hour, Minute, and Second.

8. Turn the jog shuttle to move the cursor to Set and press SELECT. Press SELECT

• When Selecting SNTP (Use the NTP Server or SNTP Server to Set the Date/Time)

6. Use jog shuttle & SELECT to set the Time Hour of Time Difference from GMT in

7. Likewise, set the Minute of Time Difference From GMT in the range of 0 to 59.

8. Turn the jog shuttle to move the cursor to Set and press SELECT.

to confirm the Date/Time setting.

Set the year, month, date,
hours, minutes, and seconds.

Confirm the entered date.

the range of -12 to 13.

If the instrument is connected to the network and the NTP server or SNTP server is
already specified, pressing SELECT will make the instrument retrieve the date/time
information from the NTP server or SNTP server and automatically set the current date/
time by calculating the specified time difference from GMT. If the time information cannot
be retrieved such as due to an incorrect assignment of the SNTP server, an error
message is displayed.

Explanation

Set the time difference from GMT
(Greenwich Mean Time).

Confirm the specified time difference from GMT
(Greenwich Mean Time).

Date (Year/Month/Date)

Set the year, month and day. The selectable range of years is 1999 to 2079.

Time (Hour/Minute/Second)

Set the time using a 24-hour clock.

Automatically Setting the Date/Time Using the NTP Server or SNTP Server

On models with the Ethernet interface installed, the instrument can behave as an SNTP
client to retrieve data/time information from a specified NTP server or SNTP server on
the Internet and automatically set the date/time. After retrieving the current date/time
information, the date/time information is retrieved every time the power to the instrument
is turned ON.
For the procedure of specifying the SNTP server, see section 13.8, “Setting the Time
Difference from GMT (Greenwich Mean Time).”
The time difference from GMT that you specify here is synchronized to the Time
difference From GMT setting in section 13.8, “Setting the Time Difference from GMT.”

Note

• The date/time setting is backed up with the lithium battery when the power is turned OFF.

• Leap years are supported.

3-14

IM 701730-01E

Chapter 4 Common Operations

4.1 Operations and Functions of Keys and the Jog Shuttle

Basic Key Operations

Displaying the Setup Menu of the Panel Keys

1. Press the desired panel operation key. The setup menu appears.

2. Press the soft key corresponding to the desired setup menu item.

Setup menu

D

C ( or )

When controlled by the jog shuttle, changes to .

B

A ( or )

When controlled by the jog shuttle, changes to .

A: Press the corresponding soft key to set the item under jog shuttle control.

Turn the jog shuttle to change the setting. Press RESET to set the item back to the initial setting.

B: Press the corresponding soft key to display the selection menu.

Press the soft key corresponding to a selection to make the selection.

C: Press the corresponding soft key to set the item under jog shuttle control.

Turn the jog shuttle to set the value. Press the arrow keys to change the selected digit.
You can directly enter the value from a USB keyboard.

D: Press the corresponding soft key to switch the selected item.

E F

E: Appears when there are two pages of the setup menu.

Press the corresponding soft key to display page 2/2 (2 of 2) of the setup menu.
The name changes to “Back (2/2).” To return to page 1/2 (1 of 2),
press the corresponding soft key again.

F: Appears when the soft key selections span over multiple pages.

Press the corresponding soft key or the right arrow key to display the next page of the menu.
For example, if there are two pages, the pages advance in the following order:
page 1, page 2, page 1, page 2, and so on.

4

Common Operations

IM 701730-01E

Displaying the Setup Menu Marked in Purple above or below the Panel Keys

In the explanations in this manual, SHIFT + panel key name (purple text) refers to the
following operation.

1. Press the SHIFT key. The green indicator above SHIFT illuminates to indicate the
shifted state. The setup menu marked in purple above or below the panel keys can
be selected.

2. Press the panel key corresponding to the setup menu you wish to display.

4-1

4.1 Operations and Functions of Keys and the Jog Shuttle

Operations on the Setup Dialog Box

In the explanations in this manual, jog shuttle & SELECT refers to the following
operation.

1. Open the setup dialog box using basic key operations or other means.

2. Turn the jog shuttle to move the cursor to the item you wish to set.

3. Press SELECT.
The behavior that results when you press SELECT varies depending on the item
as described below.

* When selecting a medium, directory, or file name on the File List window, you operate the

jog shuttle to move the cursor and select using the SELECT key. This operation is also
referred to as jog shuttle & SELECT.

Setup Dialog Box

Turn the jog shuttle to move the cursor to the item you wish to set.

G

H

I

When Source1 is selected (G)

Selection
menu

G: Press SELECT to display the selection menu.

Turn the jog shuttle to move the cursor to the item you wish to set.
Press SELECT to confirm the selection.

H: Press the SELECT key to display the value entry box.

Turn the jog shuttle to set the value. Press the arrow keys to change the selected digit.
You can directly enter the value from a USB keyboard.
Press RESET to set the item back to the initial setting.

I: Press the SELECT key to switch the selected item.

When Center is selected (H)

Value entry box

Clearing the Setup Menu and Setup Dialog Box Displays

Press ESC. The setup menu or the dialog box shown on top is cleared from the screen.

Note

• In the procedural explanations in this manual, the operation of clearing the setup menu or
setup dialog box may not be given.

• If the setup menu is cleared when the automated measurement values of waveform
parameters or cursor measurement values are displayed in the waveform display area, these
measured values are displayed at the display position of the setup menu.

4-2

IM 701730-01E

4.2 Entering Values and Strings

Entering Values

Entering Values Directly Using the Dedicated Knobs

The dedicated knobs indicated below can be turned to directly enter values.

• V/DIV knob

• TIME/DIV knob

CLEAR
TRACE

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

SEARCH

ZOOM

MATH

SHIFT

PHASE

ACQ START/ STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP
SHOT

SELECTRESET

HELP

4

Common Operations

V/DIV

TIME/DIV

Entering Values Using the Jog Shuttle

After selecting the setup item using the soft key, use the jog shuttle to change the value
(in the explanations in this manual, this operation may be indicated as jog shuttle &
SELECT. The outer shuttle ring can be used to step through the values in large
increments. On some items, the arrow keys below the jog shuttle can be used to change
the selected digit.

Resets the value to the initial value.

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH

1

CH

2

CH

3

CH

4

CLEAR
TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

SEARCH

ZOOM

MATH

SHIFT

PHASE

ACQ START/ STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

Shuttle ring

SNAP

HELP

SHOT

ESC

SELECTRESET

Jog shuttle

Decreases the value.

Increases the value.

Arrow keys: Changes the current digit.

IM 701730-01E

Mark indicating that the jog shuttle can be used to set the value

Note

The items that can be changed using the jog shuttle are reset to their default values when the
RESET key is pressed.

4-3

4.2 Entering Values and Strings

Entering Strings

The keyboard displayed on the screen is used to enter character strings such as file
names and comments. The jog shuttle, SELECT key, and arrow keys are used to
operate the keyboard to enter the character strings.

Operating the Keyboard

1. Turn the jog shuttle to move the cursor to the character to be entered. You can also

2. Press the SELECT key to enter the character.

3. Repeat steps 1 and 2 to enter all the characters in the string.

4. Selecting ENT on the keyboard and pressing SELECT confirms the string and the

press the soft keys corresponding to

and to move the cursor vertically.

If a character string has already been entered, move the cursor to the position in
the string at which you want to enter a character.

keyboard disappears. You can also press the ENT soft key to confirm the string
and clear the keyboard. At the same time, the confirmed string is temporarily
stored.
If you wish to clear the entire string that you have entered, press RESET before
confirming the string.

Keyboard for entering capital letters: toggle using the CAPS soft key.

Input character string

INSERT indicator

A: Moves the cursor upward.
B: Moves the cursor downward.

C: Switches between uppercase and

lowercase and a portion of the symbols.

D: Deletes the character before the entry position.

E: Switches the insert/overwrite mode.

When in insert mode, the INSERT indicator
on the keyboard illuminates in red.

F: Recalls the temporary stored string.

See “Recall” described later.

A B C D E F G

Keyboard for entering lowercase letters: toggle using the CAPS soft key.

G: Confirms the displayed characters.

Temporary Storage of Character Strings

Up to eight confirmed strings are automatically stored. When the number of confirmed
strings exceeds 8, the strings are deleted in order starting from the oldest string.
For items with a string set as a default value such as channel labels, up to eight strings
including the initial string can be temporarily stored. Even when the number of confirmed
string exceeds 8, the default string is not cleared. The oldest of the seven confirmed
strings excluding the default string is deleted.

4-4

IM 701730-01E

4.2 Entering Values and Strings

Recalling

(Note that the unconfirmed string that is displayed in the entry box of the keyboard is
overwritten when a string is recalled using the procedure in step 1 below.)

1. Every time the

soft key is pressed, strings that are temporarily stored appear in
order from the newest string in the input box of the keyboard. When the eight
strings that are temporarily stored are displayed, the newest string is displayed
again.

2. You can also edit the recalled string by performing steps 1 to 4 of “Entering Strings”
described above. When the string is confirmed, it is temporarily stored as a new
string.

Keys Other Than the Character Keys

DEL Deletes the character at the cursor.
INS Switches the insert/overwrite mode. When in insert mode, the INSERT indicator on the

SPACE Enters a space.
ENT Confirms the displayed characters.
CAPS Switches between uppercase and lowercase. Also switches a portion of the characters

keyboard illuminates in red.

assigned to the keyboard.

Number of Characters and Types That Can Be Used in the Settings

Number of Characters Characters That Can Be Used

Date/Time Specified number 0 to 9(/ :)
File name 1 to 14 characters 0 to 9, A to Z, %, _, ( , ), ­Comments for screen images 0 to 20 characters All characters (including spaces)
Comments for files 0 to 25 characters All characters (including spaces)
Comments for e-mails 0 to 30 characters All ASCII characters on the keyboard

E-mail address 0 to forty characters All ASCII characters on the keyboard

User name and login name 0 to 15 characters All ASCII characters on the keyboard

Password 0 to 15 characters All ASCII characters on the keyboard

(including spaces)

(including spaces)

(including spaces)

(including spaces)

4

Common Operations

IM 701730-01E

Note

• Multiple @ characters cannot be entered consecutively.

• File names are not case-sensitive. Comments are case-sensitive. In addition, the following file
names cannot be used due to limitations of MS-DOS.
AAUX, CON, PRN, NUL, CLOCK, COM1 to COM9, and LPT1 to LPT9

4-5

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

Operations Using a USB Keyboard

You can connect a USB keyboard for entering file names, comments, and other
information. In addition, the functions of each key on the front panel of the instrument are
assigned to the keys on the keyboard (see appendix 5). Thus, the keyboard can be used
to carry out operations that are the same as the key operations on the instrument.

Keyboards That Can Be Used

Keyboards that can be used depend on the USB keyboard language that you selected in
section 15.2 (English or Japanese). The following keyboards that conform to USB
Human Interface Devices (HID) Class Version 1.1 can be used.

• When the USB keyboard language is English: 104 keyboard and 89 keyboard

• When the USB keyboard language is Japanese: 109 keyboard and 89 keyboard
The default setting is the language specified by the message language selection (see
section 15.1). To use a Japanese keyboard, change the USB keyboard language
according to the procedures given in section 15.2.

Note

• Connect only the keyboards that are allowed.

• The operation of USB keyboards connected to a USB hub or those that have mouse
connectors is not guaranteed.

• For USB keyboards that have been tested for compatibility, contact your nearest
YOKOGAWA dealer.

USB PERIPHERAL Connector

Connect the USB keyboard to the USB PERIPHERAL connector on the rear panel.
There are two USB PERIPHERAL connectors (ports).

1 2 3 4

Port 1

Port 2

Pin No. Signal Name

1 VBUS: +5 V
2 D-: –Data
3D+: +Data
4 GND: Ground

Connection Procedure

When connecting a USB keyboard, directly connect the keyboard to the instrument using
a USB cable as shown below. You can connect the USB cable regardless of whether the
power to the instrument is ON or OFF (supports hot-plugging). Connect the type A
connector of the USB cable to the instrument; connect the type B connector to the
keyboard. When the power switch is ON, the keyboard is detected and enabled
approximately six seconds after it is connected.

4-6

USB PERIPHERAL

USB keyboard

DL1700E

IM 701730-01E

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

Note

• Connect the keyboard directly without going through a USB hub.

• Do not connect multiple keyboards. Only one keyboard, one mouse, and one printer can be
connected.

• Holding down a key on the keyboard does not enter the character or value repeatedly.

• Do not connect and disconnect multiple USB devices successively. Allow at least ten seconds
between the connection and disconnection of a USB device and the connection and
disconnection of the next USB device.

• Do not disconnect the USB cable after the power is turned ON until key operation becomes
possible (approximately 20 to 30 s).

Confirming the Type of Keyboard That Is Connected

To determine the type of keyboard that is connected to the instrument, follow the
procedure given in section 15.2.

Entering File Names, Comments, and Other Items

When a keyboard is displayed on the screen, you can enter the file name, comment, and
other items using a USB keyboard. The character that is entered through each key of the
USB keyboard varies depending on the keyboard type. For details, see appendix 5.

Executing Functions Corresponding to the Front Panel Keys of the Instrument

The functions corresponding to the front panel keys of the instrument are assigned to the
keys on the USB keyboard. By pressing the keys on the keyboard, you can operate the
instrument in a similar fashion. The assignment of functions varies depending on the
keyboard type. For details, see appendix 5.

4

Common Operations

Entering Values from a USB Keyboard

You can enter values from a USB keyboard for items with the

Value entered from the keyboard

Press the corresponding soft key to enter a numerical
value using the USB keyboard
Press the Enter key to enter the value and display it on screen.

or icon.

Entering Values with Prefix Units

If a prefix unit is shown as in “Offset” in the above example (“k” of “kV”), you can enter
not only the value but also the prefix unit from the USB keyboard.
The items for which you can enter prefix units are voltage (V), time (seconds: s), and
current (A).

• Entry Example

• Entering 1 for the Offset in the example above is equivalent to entering 1 V, and
the screen displays 1000 mV or 1.0 V.

• Entering 1, 0, m for the Offset is equivalent to entering 10 mV. The screen displays
10 mV, 0.01 V, and so on. In this case, the setting takes effect from the point at
which the prefix units are entered, so you do not have to press the Enter key.

IM 701730-01E

Input Key Prefix Unit

K or k 103 (kilo)
m10
U or u 10–6 (micro)
N or n 10–9 (nano)
P or p 10

–3

–12

(mili)

(pico)

4-7

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

Operations Using a USB Mouse

You can use a USB mouse to operate the instrument as you would using the front panel
keys. In addition, you can point to a desired item on a menu and click the item. This is
analogous to pressing a soft key corresponding to a menu and pressing the SELECT
key.

USB PERIPHERAL Connector

The USB mouse is connected to the USB PERIPHERAL connector on the rear panel of
the instrument. For details on the USB PERIPHERAL connector, see page 4-6.

Compatible USB Mouse

A USB wheel mouse conforming to USB HID Class Version 1.1 can be used.

Note

• For USB mouse devices that have been tested for compatibility, contact your nearest
YOKOGAWA dealer.

• Some items cannot be specified when using a mouse without a wheel.

Connection Procedure

When connecting a USB mouse, directly connect the mouse to the USB PERIPHERIAL
connector on the rear panel (see page 4-6). You can connect/disconnect the USB mouse
connector regardless of the power ON/OFF state of the instrument (supports hot­plugging). When the power switch is turned ON, the mouse is detected approximately six
seconds after it is connected, and a pointer (

) is displayed.

USB PERIPHERAL

USB Mouse

DL1700E

Note

There are two USB PERIPHERAL connectors on the instrument. However, do not connect
mouse devices to both connectors at the same time.

Confirming the Type of USB Mouse That Is Connected

The procedure for confirming the type of USB mouse that is connected to the instrument
is the same as the procedure for confirming the type of USB keyboard. See section 15.2.

4-8

IM 701730-01E

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

USB Mouse Operation

• Operations Similar to the Front Panel Keys (Top Menu)
Displaying the Top Menu

Right-click on the screen. The front panel key names on the instrument are displayed
as the top menu.

Selecting Items on the Top Menu

Click the item you wish to select. The setup menu corresponding to the selected item
is displayed on the right side of the screen. The top menu is cleared from the screen.
Pointing to items with a sub menu (items with a > mark displayed to their right)
displays the sub menu. As with the top menu, click the item you wish to select and
left-click the item.

Top menu

Right-click to display the top menu

Sub menu

Items that have layers under the top

Pointer

menu are displayed as sub menus

4

Common Operations

IM 701730-01E

The setup menu appears.

Note

• The following key names do not appear on the top menu.

ESC, RESET, SELECT, HELP, and arrow keys

• The top menu also displays characters that are marked in purple above the panel keys.

• The TRIGGER sub menu contains the following TRIGGER group panel key names.

MODE, SIMPLE/ENHANCED, POSITION, ACTION, and DELAY

• To display the COPY menu or the IMAGE SAVE menu, select COPY-MENU or IMAGE-

MENU, respectively. To execute the COPY or IMAGE SAVE operation, select COPY or
IMAGE SAVE, respectively.

4-9

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

• Setup Menu Operation (Similar to the Soft Key Operation)
Selecting an Item on the Setup Menu

Left-click the item you wish to select on the setup menu.
If another menu appears when you select an item, move the pointer to the new menu
displaying the item you wish to select and left-click the item.
If an item such as ON or OFF appears when you select an item, move the pointer to
the new frame and left-click within the frame to switch the selected item.
For menus in which items are selected using jog shuttle & SELECT (see page 4-3),
left-click the desired item. Left-click again to confirm the new setting and close the
selection dialog box. You can turn the mouse wheel to select scrollable items.

Left-click within the frame to show the selection menu.
Point to the item you wish to select and left-click the item to confirm the selection.

Left-click within this frame to switch the
selected item for each click.

Selection items

Clearing the Menu

Left-click an area outside the menu.

• Setting Values

For menu items with a

or icon, the numeric value can be entered as follows:

• To select a menu item with a or icon, left-click the center of the menu item. If

there are two setup items in a single menu item, you can repetitively left-click to
select either item.

• Turn the mouse wheel downward to increase the value.

• Turn the mouse wheel upward to decrease the value.

• To change the selected digit, move the pointer to the left or right of the value. The

pointer changes to

or . Left-click to the left or right of the value. If you point to
the left of the value and left-click, the current digit moves to the left; if you point to
the right of the value and left-click, the current digit moves to the right. The current
digit moves one digit at a time for each left-click.

• To restore a value’s default setting, right-click on the value’s menu item.

Moving the pointer in this menu causes the pointer shape to change.
Left-click to move the current digit.
Right-click on the menu parameter to reset the value to default.

4-10

IM 701730-01E

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

• Selecting Toggle Box Items on the Dialog Box

Left-click the item you wish to select. The item is selected. Click the selected item
again to deselect it.
To close the dialog box, point to an area outside the dialog box and left-click.

Left-click the item you wish to select.

Note

To close an error dialog box, left- or right-click or turn the mouse wheel without moving the
mouse.

• Selecting a File, Directory, or Disk Drive on the File List Window

Left-click a file, directory, or disk drive name to select it.
Turn the mouse wheel to scroll through the file list.
To cancel the selection, point to an area outside the file list window and left-click. The
selection is cancelled, and the file list window closes.

4

Common Operations

Scroll bar

Move the pointer to the file, directory, or
storage medium you wish to select and left-click.

IM 701730-01E

4-11

4.3 Operating the instrument Using a USB Keyboard or a USB Mouse

• Setting the V/div and T/div
Setting the V/div

When the waveform of a channel measuring a voltage is displayed, point near the V/
div value displayed at the bottom of the screen. The pointer changes to
Left-click on the V/div value of the channel you wish to set. The target V/div value is
enclosed in a box and selected.
Turning the mouse wheel upward increases the V/div value; turning it downward
decreases the V/div value.

Setting the T/div

Point near the T/div value displayed at the upper right corner of the screen. The
pointer changes to

. Turning the mouse wheel upward increases the T/div value;

turning it downward decreases the T/div value.

Moving the pointer to the position indicated below changes the pointer display ( ).
Yo u can change the V/div or T/div setting by turning the wheel in this condition.

.

4-12

IM 701730-01E

4.4 Initializing Settings

Procedure

CLEAR
TRACE

HISTORY

MEASURE

SETUP

POWER

CURSOR

DISPLAY

CH 1

CH 2

CH 3

CH 4

X - Y

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

Executing Initialization

1. Press SETUP.

2. Press the Initialize soft key. Initialization executes.

SEARCH

ZOOM

MATH

PHASE

SHIFT

ACQ START/ STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC
located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

4

Common Operations

IM 701730-01E

Cancels initialization Executes initialization

Canceling Initialization

3. Press the Undo Initialize soft key. The settings return to the conditions that existed
immediately before initialization.

Note

When you turn OFF the power switch, the settings that existed immediately before
initialization are cleared. Therefore, the “Undo Initialize” operation is not possible in this case.

4-13

4.4 Initializing Settings

Explanation

Values set using keys can be restored to their original conditions upon shipment from the
factory. This is useful when you wish to clear previous settings or start measurement
from scratch.

Initialization

Initialization refers to the act of restoring the factory default conditions.
For a description of the conditions of the instrument upon shipment from the factory, see
appendix 4, “List of Default Settings.”

Settings That Cannot Be Initialized

• Date/Time settings

• Communication related settings

• Setup data that has been stored using the store/recall function

• English/Japanese language setting

• USB keyboard language

Canceling Initialization

If you initialize the settings by mistake, you can press the Undo Initialize soft key to
return to the conditions that existed before the initialization.

Initializing All the Settings

When the power is turned ON while holding down the RESET key, all settings excluding
the date/time setting (display ON/OFF is initialized) are initialized to the factory defaults.
Setup data that has been stored using the store/recall function is also initialized. If you
initialize the instrument in this fashion, the settings cannot be set back to their original
condition.

4-14

IM 701730-01E

4.5 Executing Auto Setup

Procedure

HISTORY

MEASURE

SETUP

POWER

CLEAR
TRACE

CURSOR

DISPLAY

CH 1

CH 2

CH 3

CH 4

X - Y

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

Executing Auto Setup

1. Press SETUP.

2. Press the Auto Setup soft key. Auto setup executes.

MATH

ACQ START/ STOP

PHASE

SHIFT

SEARCH

ZOOM

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

When auto setup is executed, waveform acquisition starts automatically.

Before Auto setup

ESC

SNAP
SHOT

HELP

• To exit the menu during operation, press ESC

SELECTRESET

located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

4

Common Operations

Executes auto setup

After auto setup

Cancels auto setup

Canceling Auto Setup

3. Press the Undo Auto Setup soft key. The settings are set back to their original
condition.

IM 701730-01E

4-15

4.5 Executing Auto Setup

Explanation

The auto setup function automatically sets the key settings such as V/div, T/div, and
trigger level that are appropriate for the input signal.

Center Position after Auto Setup

The center position after auto setup is 0 V.

Applicable Channels

Auto setup is performed on all channels.

Loaded Waveforms

After Auto Setup, loaded waveforms are unloaded. Press the Undo Auto Setup soft key
to recover unloaded waveforms.

Canceling Auto Setup

Pressing the Undo Auto Setup soft key sets the instrument back to the conditions that
existed immediately before auto setup. However, when you turn OFF the power switch,
the settings that existed immediately before auto setup are cleared. Therefore, the “Undo
Auto Setup” operation is not possible in this case.

Applicable Waveforms for Auto Setup

Frequency: Approximately 50 Hz or higher
Absolute value of the input voltage: Maximum value is greater than or equal to

approximately 20 mV (1:1)
Type: Repetitive waveform (not complex)
Input coupling: DC

Note

The auto setup function may not work properly if the waveform includes DC components or
high-frequency components.

4-16

IM 701730-01E

4.5 Executing Auto Setup

Setup Data after Executing Auto Setup

Waveform acquisition/display conditions

Acquisition mode Normal
Acquisition count Infinite
Record length 10 k
Interleave mode OFF
Time base Int
Accumulate mode OFF
Zoom target Channels whose display is ON (waveforms whose Allocation on the

ZOOM menu is OFF are not displayed).

Vertical-axis settings

V/div Value that causes the absolute value of the input waveform to be 1.6 to

4 divisions
Offset voltage 0 V
Coupling Other than DC50 Ω: DC 1 MΩ; DC 50 Ω , DC 50 Ω
Bandwidth limit FULL
Display ON/OFF Turns ON channels whose absolute value of the input voltage is greater

than or equal to 20 mV (1:1)
Position 0 divisions

Horizontal-axis settings

T/div Value that the displays 1.6 to 4 periods of the waveform with the

shortest period of the auto setup target waveforms

Trigger settings

Trigger mode Auto
Trigger type Simple
Trigger source Channel whose waveform amplitude is greater than or equal to one

division with the longest period
Trigger level/slope Center level between the maximum and minimum values/rising
Trigger coupling DC
HF rejection OFF
Hysteresis
Hold off time 80 ns
Trigger position 50%
Trigger delay 0 s
Trigger gate OFF

Computation settings

Scaling auto
Items other than those listed above are not applicable for auto setup.

4

Common Operations

IM 701730-01E

4-17

4.6 Performing Calibration

Procedure

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

CLEAR
TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

1. Press the MISC key. The MISC menu appears.

2. Press the Calibration soft key. The Calibration menu appears.

3. Press the Auto Cal soft key to select ON or OFF.

SEARCH

ZOOM

MATH

SHIFT

PHASE

ACQ START/ STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC
located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

4. Press the Cal Exec soft key. Calibration is executed.

4-18

IM 701730-01E

Explanation

4.6 Performing Calibration

Calibration

The following items are calibrated. Perform calibration when you wish to measure
waveforms with high accuracy.

• Ground level and gain of the vertical axis

• Trigger threshold level

• Time measurement value during repetitive sampling

Note

The calibration described above is performed automatically when the power switch is turned
ON.

Precautions to Be Taken When Performing Calibration

• Always allow the instrument to warm up for at least thirty minutes after the power is
turned ON before starting calibration. If calibration is performed immediately after the
power is turned ON, the calibration may be inaccurate due to drift caused by
fluctuation in the temperature of the instrument.

• Calibration must be performed when the temperature of the instrument is stable and is
between 5 and 40°C (preferably at 23°C ± 2°C).

• Do not apply a signal when performing calibration. Calibration may be executed
incorrectly when an input signal is being applied.

Auto Calibration

Calibration is automatically performed when T/div is changed and waveform acquisition
is started for the first time after the following time elapses after turning ON the power.

•3 minutes

• 10 minutes

• 30 minutes

•1 hour and every hour thereafter

If calibration was executed while a signal was being applied, it is recommended that the
instrument be recalibrated without applying a signal.

4

Common Operations

IM 701730-01E

4-19

4.7 Correcting the Delay Time of the Input Signals

Procedure

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

CLEAR
TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

1. Press the MISC key. The MISC menu appears.

2. Press the Calibration soft key. The Calibration menu appears.

3. Press the Deskew soft key to select ON or OFF.

MATH

ACQ START/ STOP

PHASE

SHIFT

SEARCH

ZOOM

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

• If you select ON, proceed to step 4.

• If you select OFF, the procedure is complete.

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC
located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

4. Press the Target CH soft key. The Target CH menu appears.

5. Press the CH1 to CH4(2) soft key to select the target channel.

6. Turn the jog shuttle to set the Deskew Time.

4-20

IM 701730-01E

Explanation

4.7 Correcting the Delay Time of the Input Signals

You can use the deskew function to minimize the effects (skew) of the delay time of the
input signals due to the probe or other factors, and observe the input signal.

You can correct the delay time of the signals on CH1 through CH4(2).
You can select up to CH2 on the DL1720E and up to CH4 on the DL1735E/DL1740E/
DL1740EL, respectively.

Selectable Range of Skew Correction

The correction time can be set in the following range.
–100 ns to 100 ns (resolution is 0.01 ns)

4

Common Operations

IM 701730-01E

4-21

4.8 Using the Help Function

Procedure

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

CLEAR
TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

Displaying the Help Window

1. Press HELP. The help window appears.

2. Press the panel key or soft key that you wish to review.

Clearing the Help Window

3. Press HELP again. The help window disappears.

SEARCH

ZOOM

MATH

SHIFT

PHASE

ACQ START/ STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC
located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

Explanation

Displaying the Help Window

When you press the HELP key, a help window containing information about the soft key
menu or jog shuttle menu that was displayed immediately before HELP was pressed
appears.
If you press a key while the help window is displayed, the help window shrinks. If you
press a key while the small help window is displayed, a help window containing
information about the key appears.

Clearing the Help Window

If you press the HELP key again while a help window is displayed, the help window
closes.

4-22

IM 701730-01E

Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON and OFF

Procedure

HISTORY

MEASURE

SETUP

POWER

CLEAR
TRACE

CURSOR

DISPLAY

CH 1

CH 2

CH 3

CH 4

X - Y

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

1. Press one of the CH1 to CH4(2) keys to select the channel. The CH menu

2. Press the Display soft key to select ON or OFF. You can also turn ON/OFF the

MATH

ACQ START/ STOP

PHASE

SHIFT

SEARCH

ZOOM

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

appears.

channel by pressing CH1 to CH4(2) twice.

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC

• For a description of the operation using a USB

located above the soft keys.

keyboard or a USB mouse, see section 4.3.

5

Vertical and Horizontal Axes

Explanation

IM 701730-01E

For channels that are turned ON, the LED to the left of the channel key illuminates.
You can simultaneously display the waveforms input on channels 1 through 4 (or
channels 1 and 2 for the DL1720E).
For channels that are turned ON, the LED to the left of the channel key illuminates.

Note

• The screen can be split into up to six display areas (or up to three on the DL1720E) using the
DISPLAY menu (see section 8.1). Scale values (see section 8.8) and waveform labels (see
section 8.9) can also be displayed.

• If waveforms are recalled from the history waveforms or loaded from a storage medium such
as a floppy disk or PC card, the input waveform cannot be displayed. To compare them, you
can use the Snapshot function (see section 8.6).

5-1

5.2 Setting V/div

Procedure

CLEAR
TRACE

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

Using the V/div Knob

1. Press one of the CH1 to CH4(2) keys to select the channel. The CH menu

2. Turn the V/DIV knob to set the V/div value.

Note

MATH

ACQ START/ STOP

PHASE

SHIFT

SEARCH

ZOOM

SIMPLE

ACTION DELAY

MODE POSITION

appears.

• The displayed waveforms do not change if you change the V/div value while the waveform
acquisition is stopped. The new V/div value takes effect the next time the waveform
acquisition is started.

• Turning the V/DIV knob while acquisition is stopped has no affect on cursor measurement
values and automated measurement values of waveform parameters. The displayed values
are for the original V/div setting.

TRIGGER

TRIG D

ENHANCED

ESC

<For a description of this function, refer to page 2-3.>

SNAP

HELP

SHOT

• To exit the menu during operation, press ESC

SELECTRESET

located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

Using the Variable Soft Key

1. Press one of the CH1 to CH4(2) keys to select the channel. The CH menu
appears.

2. Press the Next (1/2) soft key.

3. Press the Variable soft key.

4. Turn the jog shuttle to set the V/div value.

Note

• If you change the V/div value by turning the V/DIV knob, the Variable setting is cancelled.

• If you press the RESET key, the V/div value set using the Variable soft key is reset, and the
value returns to the initial V/div value set using the V/DIV knob.

5-2

IM 701730-01E

Explanation

5.2 Setting V/div

The V/div (A/div when current probes are used) setting is used to adjust the displayed
amplitude of the waveform for easy viewing. You can set the value in terms of the
voltage (current) per division of the screen grid.
There are two methods for setting this value.

Setting Using the V/div Knob

V/div is set in steps of 1-2-5 (1 V/div -> 2 V/div -> 5 V/div).
This value becomes the reference for the selectable range of settings using Variable
(see the next section) and the setup step (resolution).

• Selectable Range of V/div

The table below shows the selectable range according to the probe attenuation/
current to-voltage conversion ratio setting (see section 5.5).

Probe attenuation Setting range (when input coupling Setting range (when input coupling

AC1 MΩ or DC1 MΩ is selected): DC50 Ω is selected):

1:1 2 mV/div to 10 V/div: 2 mV/div-1 V/div
10:1 20 mV/div-100 V/div 20 mV/div-10 V/div
100:1 0.2 V/div-1 kV/div 0.2 V/div-100 V/div
1000:1 2 V/div-10 kV/div 2 V/div-1 kV/div

Probe current-to- Setting range (when input coupling Setting range (when input coupling
voltage conversion AC1 MΩ or DC1 MΩ is selected): DC50 Ω is selected):
ratio

10A:1 20 mA/div-100 A/div 20 mA/div-10 A/div
100A:1 0.2 A/div-1 kA/div 0.2 A/div-100 A/div

5

Vertical and Horizontal Axes

Using the Variable Command in the CH Menu

The variable command allows the V/div (A/div) values to be set in smaller steps than the
setting entered using the V/div knob. It can also be used to expand/reduce the displayed
waveform vertically after waveform acquisition.
Waveform acquisition can be started using the modified V/div (A/div) setting.

• Setting Range and Steps

The table below shows the values for the case when the probe attenuation is 10:1.

Setting Using the V/div Knob Selectable Range Using Variable Setting Steps

20 mV/div 2.0 mV-50.0 mV 0.2 mV
50 mV/div 5.0 mV-100.0 mV 0.5 mV
100 mV/div 10 mV-200 mV 1 mV
200 mV/div 20 mV-500 mV 2 mV
500 mV/div 50 mV-1000 mV 5 mV
1 V/div 0.10 V-2.00 V 0.01 V
2 V/div 0.20 V-5.00 V 0.02 V
5 V/div 0.50 V-10.00 V 0.05 V
10 V/div 1.0 V-20.0 V 0.1 V
20 V/div 2.0 V-50.0 V 0.2 V
50 V/div 5.0 V-100.0 V 0.5 V
100 V/div 10 V-200 V 1 V

• The values are 1/10th, 10 times, and 100 times the values shown above if the probe attenuation
is 1:1, 100:1, and 1000:1, respectively.

• If the probe current-to-voltage conversion ratio is 10 A: 1 V (0.01 V/A), the values are the same
values shown above with the unit changed to A. If the ratio is 100 A: 1 V (0.01 V/A), the values
are ten times the values shown above with the unit changed to A.

IM 701730-01E

5-3

5.3 Setting the Vertical Position of the Waveform

<For a description of this function, refer to page 2-3.>

Procedure

HISTORY

MEASURE

SETUP

POWER

CURSOR

CH 1

CH 2

CH 3

CH 4

CLEAR
TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

1. Press one of the CH1 to CH4(2) keys to select the channel. The CH menu

2. Press the Position soft key to set Position as the item under jog shuttle control.

SEARCH

ZOOM

MATH

ACQ START/ STOP

PHASE

SHIFT

SIMPLE

MODE POSITION

appears.

TRIGGER

TRIG D

ENHANCED

ACTION DELAY

ESC

SNAP
SHOT

SELECTRESET

HELP

• To exit the menu during operation, press ESC
located above the soft keys.

• For a description of the operation using a USB
keyboard or a USB mouse, see section 4.3.

3. Turn the jog shuttle to set the vertical position.

5-4

IM 701730-01E