YOKOGAWA DL1620, DL1640, DL1640L User manual

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DL1620/DL1640/DL1640L

Digital Oscilloscope

IM 701610-01E

8th Edition

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

Thank you for purchasing the DL1620/DL1640/DL1640L Digital Oscilloscope. This user’s manual contains useful information about the instrument’s functions and operating procedures as well as precautions that should be observed during use, mainly DL1640. To ensure proper use of the instrument, please read this manual thoroughly before operating it. Keep the manual in a safe place for quick reference whenever a question arises. Five manuals are provided with the instrument, including this user’s manual.

Manual Name Manual No. Description

DL1620/DL1640/DL1640L IM 701610-01E Describes all the functions (except for the User’s Manual communications function) and their operation

procedures for the instrument.

DL1620/DL1640/DL1640L IM 701610-17E Describes the communications functions of Communication Interface the GP-IB, RS-232, USB, and network User’s Manual (CD) interface.

DL1620/DL1640/DL1640L IM 701610-02E Explains basic operations only. Operation Guide

DL1640/DL1640L IM 701610-51E Describes the CAN bus signal analysis function CAN Bus Signal Analysis and SPI bus signal analysis function (option). Function

DL1640/DL1640L IM 701610-61E Describes the I2C-bus signal analysis function I2C-Bus Signal Analysis and SPI bus signal analysis function (option). Function

Notes

• The contents of this manual are subject to change without prior notice as a result of improvements in the instrument’s performance and functions. Display contents illustrated in this manual may differ slightly from what actually appears 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 representative.

• Copying or reproduction of all or any part of the contents of this manual without YOKOGAWA’s permission is strictly prohibited.

•A guarantee card is attached to the instrument. The card will not be reissued, so please read it carefully and keep it in a safe place.

• The TCP/IP software used in this product and the documentation for that TCP/IP software are based in part on BSD Networking Software, Release 1 licensed from The Regents of the University of California.

IM 701610-01E

Trademarks

Revisions

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

• Adobe, Adobe Acrobat, and PostScript are either trademarks or registered trademarks of Adobe Systems incorporated.

• Zip is a registered trademark or trademark of Iomega corporation in the Unites States and/or other countries.

• UNIX is a registered trademark of The Open Group.

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

• Other product names are trademarks or registered trademarks of their respective holders.

1st Edition: August 2002 2nd Edition: November 2002 3rd Edition: February 2003 4th Edition: August 2003 5th Edition: December 2003 6th Edition: July 2005 7th Edition: October 2007 8th Edition: April 2009

ii IM 701610-01E

Checking the Contents of the Package

Unpack the box and check the contents before operating the instrument. If the wrong instrument or accessories have been delivered, if some accessories are missing or if they appear abnormal, contact the dealer from which you purchased them.

DL1620/DL1640/DL1640L Main Body

Check that the model name and suffix code given on the name plate of the side panel match those on your order. Whenever you contact the dealer from which you purchased the instrument, tell the dealer your unit’s serial number.

MODEL

MODEL SUFFIX

NO.

Made in Japan

MODEL SUFFIX SPECIFICATIONS

701605 (DL1620) 2 channels 701610 (DL1640) 4 channels 701620 (DL1640L) 4 channels (long record length)

-AC 100 to 120 VAC, 220 to 240 VAC

-DC

Power Cord -D UL/CSA standard power cord (A1006WD)

-F VDE standard power cord (A1009WD)

-Q BS standard power cord (A1054WD)

-R AS standard power cord (A1024WD)

-H GB standard power cord (A1064WD)

-Y No power cord

Built-in Media Drive -J1 Floppy disk drive

-J2 Zip disk drive

-J3 PC card interface

Options /B5 Built-in printer

/C1 GP-IB interface+USB /C10 Ethernet interface+USB /P2 Two power output connectors for the probes (for 701605) /P4 Four power output connectors for the probes (for 701610 and

/F5 I2C-bus signal analyzer (for 701610 and 701620) /F7 CAN bus signal analyzer (for 701610 and 701620)

*1 Select -Y for the power Cord. *2 You can select a floppy disk drive, a Zip drive, or PC card interface for the built-in media drive. *3 1 printer roll (B9850NX) included. *4 It is possible to choose between a GP-IB interface+USB and an Ethernet interface+USB.

SUFFIX NO.

Made in Japan

12 VDC(for 701610 and 701620)

Maximum rated voltage: 125 V, maximum rated current: 7 A

Maximum rated voltage: 250 V, maximum rated current: 10 A

701620)

IM 701610-01E

Example : UL/CSA standard power cord, floppy disk drive, and full options

→ 701610-D-J1/B5/C1/P4 or

701610-D-J1/B5/C10/P4

iii

Checking the Contents of the Package

NO. (Instrument Number)

When contacting the dealer from which you purchased your instrument, please quote the instrument number.

Standard Accessories

The following standard accessories are supplied with the instrument. Make sure that all items are present and undamaged.

Power Cord (for -AC model )(one of the following power cords

is supplied according to the instrument’s suffix codes)

UL/CSA Standard A1006WD

VDE Standard A1009WD

BS Standard A1054WD

AS Standard A1024WD

GB Standard A1064WD

DC Power Supply Connector (for -DC model) A1105JC

D F Q R

Front Panel Protection Cover (Clear) B9989FA

User’s Manual Operation Guide

C-Bus Signal Analysis Function User’s Manual**

CAN Bus Signal Analysis Function User’s Manual***

Probe Case B9918EZ

* A roll chart will be supplied only when the instrument is equipped with a built-in printer. ** Only included with I *** Only included with CAN bus analysis function models.

200 MHz Passive Probe ×4 : DL1640/DL1640L ×2 : DL1640

700960

Printer Roll Chart * B9850NX

(×1) (×1) (×1) (×1)

Communication Interface User’s Manual CD-ROM B8050XZ

C-bus analysis function models.

Rubber Feet (×4) B9989EX

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Optional Accessories

The following optional accessories are available. On receiving these optional accessories, make sure that all the items that you ordered have been supplied and that they are undamaged. If you have any questions regarding optional accessories, or if you wish to place an order, contact the dealer from whom you purchased the instrument.

Checking the Contents of the Package

Differential Probe 700924*/701921*

100:1 Probe 700978

* The 701921 comes with a probe power cable (model B9852MJ). The 700924/700925 does not comes with a probe power cable (model B9852MJ). A probe power cable (B9852MJ) is required to supply power from the DL1620/DL1640/DL1640L. ** A 50-Ω terminator is required to connect the differential probe (701922) to the DL1620/DL1640/DL1640L.

Current Probe 701930/701931

Differential Probe 700925*

Current Probe 701932/701933

Differential Probe 701922**

GO/NO-GO Cable

366973

Battery Box 701680

Optional Spare Parts

The following optional spare parts are available. On receiving these optional spare parts, make sure that all the items that you ordered have been supplied and that they are undamaged. If you have any questions regarding optional spare parts, or if you wish to place an order, contact the dealer from whom you purchased the instrument.

50Ω Terminator 700976

Part Name Part No. Minimum Q’ty Remarks

Roll chart B9850NX 5 Thermo-sensible paper, Total 200 MHz passive probe 700960 1 Input impedance: 10 MΩ, Length:

Front panel protection cover B9989FA 1 (clear)

1.5 m

IM 701610-01E

Safety Precautions

This instrument is an IEC protection class I instrument (provided with terminal for protective grounding). The following general safety precautions must be observed 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 protection provided by this 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

To avoid injury, death of personnel or damage to the instrument, the operator must refer to an explanation in the user’s manual or service manual.

Function grounding terminal (This terminal should not be used as a “protective grounding terminal.”)

Protective grounding terminal

Alternating current

Direct current

Both direct and alternating current

ON (power)

OFF (power)

In - position of a bistable push control

Out - position of a bistable push control

vi IM 701610-01E

Safety Precautions

Make sure to comply with the following safety precautions. Not complying might result in injury or death, or damage to the instrument.

WARNING

Power Supply

Before connecting the power cord, make sure that the power supply voltage matches the voltage rating of the instrument and that it does not exceed the maximum rated voltage of the power cord.

Power Cord and Plug

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

Protective Grounding

The protective grounding terminal must be connected to ground to prevent an electric shock before turning ON the power.

Necessity of Protective Grounding

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

Defect of Protective Grounding and Fuse

Do not operate the instrument when the protective grounding or fuse might be defective.

Do Not Operate Near Flammable Materials

Do not operate the instrument in the presence of flammable liquids or vapors. Operation of any electrical instrument in such an environment constitutes a safety hazard.

Do Not Remove Any Covers

There are some areas inside the instrument with high voltages. Do not remove any cover if the power supply is connected. The cover should be removed by qualified personnel only.

External Connection

To ground securely, connect the protective grounding before connecting to measurement or control unit. Also, when touching the circuit, turn off the power to the circuit and check that there is no voltage being generated. To prevent electric shock, connect the ground terminal of the probe or input connector to the protective ground of the object under measurement.

IM 701610-01E

See below for operating environment limitations.

CAUTION

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.

vii

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 ÅgMonitoring and Control instrumentationÅh product.

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

viii IM 701610-01E

Structure of the Manual

This user’s manual consists of 16 chapters, an appendix and an index as described below.

Chapter Title Content 1 Functions Introduces the unit’s features, functions, and operating

2 Name and Use of Each Part Briefly explains the significance and use of the unit’s

4 Common Operations Explains basic operations, including acquisition start/stop,

5 Vertical and Horizontal Explains settings related to vertical (voltage) and horizontal

6 Triggering Explains how to set up and use triggers to control timing

7 Acquisition and Display Explains acquisition parameters (acquisition mode,

8 Display Explains display format, interpolation, zoom, X-Y display,

9 Waveform Analysis Explains cursor-based measurements, automatic

10 Output of Screen Data Explains how to print screen data to internal printer, or to

11 Saving and Loading Data Explains how to save and reload waveform data and

12 Trigger Input/Trigger Output/ Explains external-trigger input, external-clock input,

13 Ethernet Interface Explains how to save and load to/from a network drive,

14 Other Operations Explains how to set the display colors, display language,

15 Troubleshooting, Gives troubleshooting advice; explains screen messages

16 Specifications Lists the unit’s main specifications.

Before Making Measurements

Axes (time) axes. Vertical-axis settings include channel on/off,

to and from the Storage Storage media settings to floppy disk, PC card, etc. Medium Also explains related disk operations, including disk

RGB Video Signal Output trigger output, and RGB video output.

(Option) getting files from a floppy disk, Zip disk, or PC card, how

Maintenance, and Inspection and self-test operation.

Appendix Appendix 1 shows the relationships between the time

Index Index of contents.

principles. Please read this information to familiarize yourself with the unit’s capabilities. This chapter does not present operational details.

controls, connectors, and screen displays. Includes page references to help you find detailed information quickly.

Presents safety precautions, and explains how to install, connect up, and switch on the unit. Also explains how to connect the probes and how to set the date.

automatic setup, parameter reset, snapshots, trace clearing, and calibration.

input coupling, probe attenuation, and voltage sensitivity.

of waveform acquisition. Includes description of trigger modes, trigger types, trigger source, and trigger level.

sampling mode, record length, history), and use of overlapping (accumulated) waveform display.

graticule, and other display-related parameters.

measurements, statistical processing, mathematical operations, and GO/NO-GO determinations.

a printer connected through the USB interface, and how to store screen display to the storage medium.

formatting, file copy, and file deletion.

to output to a network printer, and receive e-mail transmissions.

click sound, and back light.

axis, sampling rate, and record length. Appendix 2 explains waveform area calculation. Appendix 3 gives the format for ASCII file headers. Appendix 4 presents a list of default settings.

IM 701610-01E

Structure of the Manual

Conventions Used in this Manual

Units

k ............. Denotes

K ............ Denotes

Bolded Items

Characters written in bold mainly refer to characters or setting values that are displayed on the screen or panel.

Symbols

The following symbols are used in this manual.

1000

. Example: 100 kS/s

1024

. Example: 720 KB (storage capacity of a floppy disk)

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

instrument to 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

WARNING

CAUTION

Note

Terms Used for Descriptions of Operations

The following terms are used in chapters 3 to 15 to distinguish certain features in descriptions.

Relevant Keys

Operating Procedure

Calls attention to actions or conditions that could cause serious or fatal injury to the user, and precautions that can be taken to prevent such occurrences.

Calls attentions to actions or conditions that could cause light injury to the user or damage to the instrument or user’s data, and precautions that can be taken to prevent such occurrences.

Calls attention to information that is important for proper operation of the instrument.

Indicates the relevant panel keys which are necessary to carry out the operation.

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.

Explanation

x IM 701610-01E

Describes settings and restrictions relating to the operation. A detailed description of the function is not provided. For a detailed description of the function, see Chapter 1.

Functions Described in This Manual and the DL1620/ DL1640/DL1640L Version

The contents of this manual describe the DL1620/DL1640/DL1640L version 1.30 or later. The table below shows the relationship between the DL1620/DL1640/DL1640L versions and the new functions. If the DL1620/DL1640/DL1640L is not of the newest version, you will not be able to use all the functions covered in this manual. Check the DL1620/ DL1640/DL1640L version by referring to Soft Version on the overview screen that appears by selecting the MISC key > Overview soft key. For details on the procedure, see section 15.4 in the User’s Manual. For up-to-date information about the DL1620/DL1640/DL1640L versions and the procedure for upgrading your DL1620/DL1640/DL1640L, check the following Web page.

http://www.yokogawa.com/tm/DL1600/

DL1620/DL1640/DL1640L Versions and New Functions

Version Suffix Code New Functions Reference Page/ Section/

1.10 or later Standard • Chinese menu/message language /F5 • I2C bus signal analysis function (including the SPI bus signal

analysis function)

1.11 or later Standard • DC power supply model + battery box

Chapter

Section 14.2 IM701610-61

Pages 3-6

1.13 or later Standard • WebDAV server function

• SNTP function

• Mail attachment function of screen image data

/F7 • CAN bus signal analysis function (including the SPI bus

signal analysis function)

1.17 or later Standard • H&V cursor

1.20 or later Standard • Korean menu/message language

• Improvement to the data transfer rate of the GP-IB interface

/B5, /C1, /C10 • YOKOGAWA logo added to the screen image data printed

on the built-in, USB, or network printer

1.30 or later /C1, /C10 • Connection of USB storage device to the USB PERIPHERAL

interface*

* This function is only supported on models that displays “USB(H): Yes(0) USB Mass Storage” on the overview screen.

Section 13.13 Section 13.11 Sections 13.6 and 13.7 IM701610-51

Section 9.1

Section 14.2 IM701610-17 Sections 10.2, 10.3, and 13.5

Section 11.4

IM 701610-01E

Foreword ......................................................................................................................................... i

Checking the Contents of the Package ..........................................................................................iii

Safety Precautions .........................................................................................................................vi

Waste Electrical and Electronic Equipment.................................................................................. viii

Structure of the Manual ..................................................................................................................ix

Functions Described in This Manual and the DL1620/DL1640/DL1640L Version..........................xi

Chapter 1 Functions

1.1 Block Diagram .................................................................................................................. 1-1

1.2 Setting the Vertical and Horizontal Axes .......................................................................... 1-3

1.3 Setting a Trigger............................................................................................................... 1-8

1.4 Setting the Acquisition and Display Conditions .............................................................. 1-14

1.5 Analyzing the Waveform ................................................................................................ 1-21

1.6 Communications ............................................................................................................ 1-30

1.7 Other Useful Functions .................................................................................................. 1-32

Chapter 2 Name and Use of Each Part

2.1 Front Panel/Rear Panel ................................................................................................... 2-1

2.2 Operation Keys/Jog Shuttle/Knobs .................................................................................. 2-3

2.3 Screens ............................................................................................................................ 2-6

Chapter 3 Before Making Measurements

3.1 Precautions During Use ................................................................................................... 3-1

3.2 Installation ........................................................................................................................ 3-3

3.3 Connecting the Power Cord ............................................................................................. 3-5

3.4 Connecting a Probe ......................................................................................................... 3-9

3.5 Compensating the Probe (Phase Correction) ................................................................ 3-12

3.6 Setting the Date and Time ............................................................................................. 3-14

Chapter 4 Common Operations

4.1 Entering Values and Character Strings ............................................................................ 4-1

4.2 Initializing Settings ......................................................................................................... 4-11

4.3 Performing Auto Setup ................................................................................................... 4-13

4.4 Storing and Recalling Setting Parameters ..................................................................... 4-15

4.5 Starting/Stopping Waveform Acquisition ........................................................................ 4-17

4.6 The Snapshot and Clear Trace Functions ..................................................................... 4-18

4.7 Calibration ...................................................................................................................... 4-19

4.8 Using the Help Function ................................................................................................. 4-21

Chapter 5 Vertical and Horizontal Axes

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

5.2 Setting the Vertical Position of a Waveform ..................................................................... 5-2

5.3 Selecting Input Coupling .................................................................................................. 5-4

5.4 Selecting Probe Attenuation............................................................................................. 5-6

5.5 Setting the Offset Voltage ................................................................................................ 5-7

5.6 The Preset Function ......................................................................................................... 5-9

5.7 Setting the Bandwidth .................................................................................................... 5-11

5.8 Setting V/div ................................................................................................................... 5-12

xii IM 701610-01E

Contents

5.9 Displaying Inverted Waveforms ..................................................................................... 5-14

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

5.11 Selecting the Timebase .................................................................................................. 5-17

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

Chapter 6 Triggering

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

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

6.3 Setting the Trigger Position .............................................................................................. 6-4

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 Generating Triggers on the Power Signal (SIMPLE) ..................................................... 6-13

6.8 Setting the AÆB(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 Setting the Width (Pulse<T, Pulse>T, T1<PLS<T2, T1<PLS<T2, Time Out) Trigger

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

6.12 Setting the OR Trigger (ENHANCED)............................................................................ 6-29

6.13 Setting the Window Trigger (ENHANCED) .................................................................... 6-32

6.14 Setting the TV Trigger (ENHANCED) ............................................................................ 6-35

6.15 Setting the Action-On Trigger ......................................................................................... 6-39

Chapter 7 Acquisition and Display

7.1 Setting the Record Length ............................................................................................... 7-1

7.2 Acquisition Mode .............................................................................................................. 7-2

7.3 Using the Sequential Store Function ............................................................................... 7-5

7.4 Using the High-resolution Mode ....................................................................................... 7-6

7.5 Setting Repetitive Sampling Mode ON/OFF .................................................................... 7-7

7.6 Using the History Memory ................................................................................................ 7-8

7.7 Searching the Historical Data Using Zone (History Search Function) ........................... 7-11

7.8 Searching the Historical Data Using Parameters (History Search Function) ................. 7-15

Chapter 8 Display

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

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

8.3 Changing the Graticule .................................................................................................... 8-5

8.4 Turning Display of the Scaling Value ON/OFF................................................................. 8-6

8.5 Setting the Waveform Labels ........................................................................................... 8-7

8.6 Accumulated Waveform Display ...................................................................................... 8-9

8.7 Turning the Translucent Mode ON/OFF......................................................................... 8-11

8.8 X-Y Waveform Display ................................................................................................... 8-12

8.9 Zooming the Waveform .................................................................................................. 8-14

8.10 Search Data Using Search and Zoom Function ............................................................ 8-17

Chapter 9 Waveform Analysis

9.1 Measuring Waveforms Using Cursors ............................................................................. 9-1

9.2 Automated Measurement of Waveform Parameters ...................................................... 9-14

9.3 Statistical Processing ..................................................................................................... 9-21

9.4 Performing Automated Measurements of Waveform Parameters on Dual Areas .......... 9-28

9.5 Adding, Subtracting, and Multiplying Waveforms........................................................... 9-35

IM 701610-01E

App

Index

xiii

Contents

9.6 Displaying the Power Spectrum ..................................................................................... 9-38

9.7 Smoothing ...................................................................................................................... 9-42

9.8 Phase-Shifted Display .................................................................................................... 9-44

9.9 GO/NO-GO Determination Using the Measurement of Waveform Parameters ............. 9-45

9.10 GO/NO-GO Determination Using Zones ........................................................................ 9-49

9.11 Using the GO/NO-GO Signal Output Function .............................................................. 9-54

Chapter 10 Output of Screen Image Data

10.1 Loading the Paper Roll into the Built-in Printer (Option) ................................................ 10-1

10.2 Outputting Screen Image Data to the Built-in Printer (Option) ....................................... 10-3

10.3 Outputting Screen Image Data to a USB Printer (Option) ............................................. 10-6

10.4 Storing Screen Image Data to the External Storage Medium ...................................... 10-10

Chapter 11 Saving and Loading Data to and from the Storage Medium

11.1 Floppy Disks .................................................................................................................. 11-1

11.2 Zip Disks ........................................................................................................................ 11-2

11.3 PC Card ......................................................................................................................... 11-4

11.4 Connecting USB Storage to the USB PERIPHERAL Interface...................................... 11-5

11.5 Formatting the Storage Medium .................................................................................... 11-7

11.6 Saving/Loading Waveform Data .................................................................................. 11-11

11.7 Saving/Loading Setup Data ......................................................................................... 11-18

11.8 Saving/Loading Snapshot Waveforms ......................................................................... 11-23

11.9 Saving the Results of the Automated Measurement of Waveform Parameters ........... 11-27

11.10 Saving the Cursor Measurement Values...................................................................... 11-30

11.11 Changing the File Attributes, Deleting Files ................................................................. 11-33

11.12 Copying Files ............................................................................................................... 11-37

11.13 Changing the Directory/File Name of the Storage Medium and Creating a Directory . 11-41

Chapter 12 Trigger Input/Trigger Output/RGB Video Signal Output

12.1 External Trigger Input, External Clock Input .................................................................. 12-1

12.2 Trigger Output (TRIG OUT) ........................................................................................... 12-3

12.3 RGB Video Signal Output (RGB VIDEO OUT) .............................................................. 12-5

12.4 Using the CH1 OUT Signal ............................................................................................ 12-7

Chapter 13 Ethernet Interface (Option)

13.1 Connecting the DL1620/DL1640/DL1640L to a Personal Computer/Workstation through

an Ethernet Interface (Option) ....................................................................................... 13-1

13.2 Configuring the Ethernet Interface (TCP/IP) .................................................................. 13-3

13.3 Saving and Loading Waveform and Setting Data to and from a Network Drive

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

13.4 Saving Screen Image Data to a Network Drive (FTP Client Function) ........................ 13-11

13.5 Sending Screen Image Data to a Network Printer (LPR Client Function) .................... 13-14

13.6 Using the Mail Function (Fixed Interval) ...................................................................... 13-16

13.7 Using the Mail Function (Action Mail Function) ............................................................ 13-19

13.8 Accessing DL1620/DL1640/DL1640L Drives from a Network Drive

(FTP Server Function) ................................................................................................. 13-21

13.9 Viewing the Ethernet Interface Option and MAC Address ........................................... 13-23

13.10 Setting the FTP Passive Mode and LPR/SMTP Timeout ............................................. 13-24

13.11 Setting the Time Difference from the GMT (Greenwich Mean Time) and SNTP .......... 13-26

13.12 Using the Web Server Function ................................................................................... 13-28

13.13 Using the Instrument as a Windows Network Drive (Version 1.13 or Later) ................ 13-52

xiv IM 701610-01E

Chapter 14 Other Operations

14.1 Setting the Screen Color and Brightness ....................................................................... 14-1

14.2 Changing the Menu/Message Language and Click Sound ............................................ 14-4

14.3 Turning OFF the Backlight and Setting the Brightness of the Backlight ........................ 14-6

14.4 Canceling the Offset Voltage ......................................................................................... 14-8

14.5 Changing the USB Keyboard Language/Confirming the Type of Keyboard that is

Connected(Option)......................................................................................................... 14-9

Contents

Chapter 15 Troubleshooting, Maintenance and Inspection

15.1 Troubleshooting ............................................................................................................. 15-1

15.2 Messages and Corrective Actions.................................................................................. 15-2

15.3 Self-Diagnostic Test (Self Test) ...................................................................................... 15-8

15.4 Checking the System Condition ................................................................................... 15-11

15.5 Resetting the Circuit Breaker (DC Power Supply Model) ............................................ 15-12

15.6 Recommended Replacement Parts ............................................................................. 15-13

Chapter 16 Specifications

16.1 Input Section .................................................................................................................. 16-1

16.2 Trigger Section ............................................................................................................... 16-2

16.3 Time Axis........................................................................................................................ 16-4

16.4 Display ........................................................................................................................... 16-4

16.5 Functions ....................................................................................................................... 16-4

16.6 Built-in Printer (Option) .................................................................................................. 16-6

16.7 Storage .......................................................................................................................... 16-7

16.8 USB PERIPHERAL Interfaces (Option) ......................................................................... 16-7

16.9 Auxiliary Input/Output Section ........................................................................................ 16-8

16.10 Computer Interface ........................................................................................................ 16-9

16.11 General ........................................................................................................................ 16-10

16.12 External Dimensions .................................................................................................... 16-12

Appendix

Index

IM 701610-01E

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-13

Appendix 3 ASCII Header File Format................................................................................. App-15

Appendix 4 List of Defaults ..................................................................................................App-19

Appendix 5 Assignment of Keys on the USB Keyboard ......................................................App-20

App

Index

Chapter 1 Functions

1.1 Block Diagram

System Configuration

External clock input

External trigger input

GO/NO-GO judgement output

RGB video signal output

Trigger output

CH1 output

Object to be

measured

Signal input

Built-in printer

(option)

Screen hard copy

Waveform data Setup data Screen image data

USB peripheral interface

Waveform data Setup data Screen image data

USB peripheral interface

Screen image data

Waveform data Setup data Screen image data

Functions

USB storage

(MO/HDD/Flash memory)

Input

USB mouse

Input

USB keyboard

USB printer

GP-IB interface (option) or Ethernet interface (option) Serial (RS-232) interface USB interface (option)

Block Diagram

Floppy disk,

Zip disk,

or PC card

Acquisition

memory

Preamplifier

ATT

CH1

CH2

CH3

CH4

Trigger

circuit

External clock input

External trigger input

* The DL1620 is not equipped with channels 3 and 4. Instead, an external trigger/external clock multi-

purpose terminal is installed in place of the CH4 terminal.

A/D

Data processing circuit

Timebase

Computer

Display

processing

circuit

Display

memory

Data

processing

memory

CPU

VGA video output

Color LCD

Built-in printer

USB

Peripheral

GP-IB

or Ethernet

Serial

(RS-232)

USB

FDD,Zip drive,

or PC card

GO/NO-GO

Trigger output CH1 output

Printer

(option)

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1-1

1.1 Block Diagram

Signal Flow

The signals to be measured enter at the input terminals and pass first to the attenuator (ATT) and preamplifier. Adjusted vertical-axis characteristics (voltage and amplitude) in accordance with the settings for input coupling, probe attenuation, V/div, and offset value are passed to the A/D converter. Voltages are converted to digital values by the A/D converter. The digital data is then processed by the data processing circuit (digital file processing, etc.). Further, averaging and other types of processing are performed after cropping at the appropriate sampling rate (as determined by the time axis settings), and the resulting data is written to the acquisition memory. The data written in the acquisition memory is then converted to waveform display data by the processing circuit and transferred to the waveform processing circuit by which the data are stored in the display memory. Waveforms are displayed on the screen based on the data stored in the display memory.

1-2

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1.2 Setting the Vertical and Horizontal Axes

500 Lines

0 500

Display Record Length

Sampling Data

Time Axis

Record Length of

Acquisition Memory

Voltage Axis

Time Axis <Sections 5.11 and 5.12>

Selection of the Timebase

With the default settings, sampling timing is controlled by the clock signal output from the timebase circuit of the instrument (see the Block Diagram, section 1.1). The sampling timing can be controlled by an external clock signal instead of the clock signal from the timebase circuit. An external clock signal can be input to the EXT CLOCK IN terminal on the rear panel. This external clock function is useful when you are observing a signal whose period varies or when you are observing a waveform by synchronizing it with the clock signal to be measured.

Setting the Time Axis

When using the internal clock, set the time axis scale as a time duration per division of the grid. The setting range is 2 ns/div to 800 s/div. The time range in which waveform is displayed is “time axis setting x 10,” as the display range along the horizontal axis is 10 divisions.

1 div = 500µs

1 div = 1 ms

Functions

10 div

Note

Display of Time Axis Direction

The sampled data is read into the acquisition memory, and a waveform is displayed based on this data. The number of data stored into the acquisition memory differs depending on settings such as time axis settings, trigger mode, and acquisition mode. The number of display lines in the time axis direction on a 10 - div screen is 500 lines. Processing therefore varies according to record length, as described immediately below. (for more details on the relation between time axis, acquisition mode, record length of acquisition memory and displayed record length, see Appendix 1).

• If displayed record length exceeds number of screen display points, multiple data points are connected with a line and displayed at the same time axis position.

• If displayed record length is less than number of screen display points, the oscilloscope interpolates the data to generate the display. (See page section 1.4)

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1-3

1.2 Setting the Vertical and Horizontal Axes

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

Changing the time axis causes corresponding changes in the sampling rate and the acquisition record length. For more detailed information, see Appendix 1.

Relationship between Time Axis Setting and Sampling Mode

The sampling method (sampling mode) for an input signal changes according to the time axis setting as described hereafter. But note that the time axis range over which this feature is actually available will vary according to the maximum displayable record length, as shown in Appendix 1.

• Real-Time Sampling Mode

Changing the time axis causes a corresponding change in the sampling rate. The maximum sampling rate is 200 MS/s (or 100 MS/s if the high-resolution mode is ON.). The input signal is sampled sequentially, and data is stored in the acquisition memory. In this mode, the waveform can only be displayed correctly at frequencies up to half the sample rate, due to Nyquist’s theorem*. Sample rate is expressed in S/s (number of samples per second). Thus, this mode is suitable for observation of a waveform which fluctuates more slowly than the sample rate. * If the sample rate is higher than the frequency of the input signal, high-frequency

components will be lost. In this case, a phenomenon in which high-frequency components change to lower frequency components occurs, due to Nyquist’s theorem. This phenomenon is called aliasing. Aliasing can be avoided by setting the acquisition mode to envelope mode and acquiring the waveform.

Aliasing Signal Input Signal Sampling Point

• Repetitive Sampling Mode

To enable this mode, you must set the time axis so that the sampling rate is greater than 200 MS/s (high-resolution mode ON: 100 MS/s). Under this mode, the oscilloscope produces a single waveform by taking samples over several periods of a repetitive signal, so that the sampling rate appears higher than it actually is. An apparent sample rate of up to 50 GS/s can be used. Furthermore, even in the real-time sampling mode, if the sample rate exceeds 200 MS/s (high-resolution mode ON: 100 MS/s) due to the time axis and the displayed record length settings, the sampling mode automatically changes to repetitive sampling.

There are two repetitive sampling methods: sequential sampling, in which a signal is sampled sequentially at a fixed interval, and random sampling, in which a signal is sampled at random to produce a waveform. This instrument uses a random sampling method which also enables observation of the waveform up to the trigger point.

Time Axis Setting and Roll Mode Display

If the time axis is set within a certain range (see Appendix 1), then the display will not be updated by trigger anymore (update mode), but the mode will switch to roll mode when new data is acquired. In roll mode, the oldest data is deleted, and the waveform shifts from right to left on the screen. A waveform can be observed in the same way as it is recorded on a pen recorder. This mode is useful when you are observing a signal which repeats or which fluctuates slowly. This mode is also useful when you want to detect glitches (fast spikes on a waveform) which occur intermittently. * Rolling display also operates during single - start acquisition, although trigger occurrence

causes the waveform to stop.

1-4

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1 div = 1 V 1 div = 0.50 V

When V/div is Switched from 1 V/div to 0.50 V/div

1.2 Setting the Vertical and Horizontal Axes

Vertical Sensitivity <Section 5.8>

The V/div (vertical sensitivity) setting is used to adjust the amplitude of the displayed waveform so that the waveform can be observed easily. The V/div setting is made by setting the voltage value per division on the screen grid. The vertical sensitivity setting operates by switching to a different attenuator (attenuation rate). The setting changes in steps (1 V/div → 2 V/div → 5 V/div ...). In addition, by performing computations on the digital data acquired using the voltage sensitivity above, the waveform can be displayed at a sensitivity of 0.4 (or 0.5) to 10 times the voltage sensitivity that was used to acquire the data (Variable).

Note

Vertical Sensitivity and Measurement Resolution

To get precise readings, it is recommended that you set the vertical sensitivity so that the waveform’s maximum and minimum amplitudes are close to the top and bottom of the screen. Note that the instrument uses 8-bit A/D converters. Incoming signals are sampled at a resolution of 255 levels (LSB), or 32 levels per division.

Effective Data Range

The instrument uses 8-bit A/D converters. Assuming that output values range from 0 to 255, the vertical center line of the display corresponds to a value of 127. Because the A/D converter reaches full range at 255, screen level 256 is not used. Note also that the insturment treats an A/D output value of 0 as if it were a 1. The screen’s effective display range extends approximately 5.29 divisions in each direction from the screen’s center line. However, if the vertical axis position is moved while the data acquisition is stopped, the effective data range also moves by the same amount.

Functions

Vertical Position <Section 5.2>

Since a total of four input waveforms can be displayed, they may overlap each other making observation difficult. In this case, the waveforms can be moved in the vertical direction so that they can be observed more easily. The vertical position mark can be set to any value in the range between ±4 div. Changing the V/div setting, the vertical axis setting is rescaled with respect to the vertical position.

Position: 0 div

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Position: 2 div

Position: –2 div

1-5

1.2 Setting the Vertical and Horizontal Axes

Offset Voltage <Section 5.5>

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 sensitivity. Normally, the offset voltage does not affect the cursor measurement values, automated measurement of waveform parameters, and computed values. However, you can turn ON offset cancel to apply the offset voltage to them. (See section 14.4.)

When offset cancel is OFF

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

When offset cancel is ON

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

Input Coupling <Section 5.3>

When you only want to observe the amplitude of an alternating current signal, eliminating the direct current components from the input signal makes observation easier. You may also want to check the ground level or observe the input signal waveform with the offset voltage removed. In these cases, you can change the input coupling setting. This will switch the coupling method, which determines how the input signal is input to the vertical control circuit (voltage axis). The input coupling method can be chosen from the following:

The input signal is sent through a capacitor to the attenuator in the vertical control circuit. This method can be used when you just want to observe the amplitude of the alternating current signal, eliminating the DC components from the input signal.

The input signal is sent directly to the attenuator in the vertical control circuit. This method can be used when you want to observe both the DC and AC components of the vertical input signal.

GND

The ground signal, not the input signal, is connected to the attenuator in the vertical control circuit. This method enables observation of the ground level on the screen.

Input terminal

1 MΩ

Input terminal

1 MΩ

Input terminal

Vertical

control

circuit

Vertical

control

circuit

Vertical

control

circuit

1-6

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1.2 Setting the Vertical and Horizontal Axes

Probe Attenuation <Section 5.4>

A probe is usually used to connect the circuit to be measured to an input terminal. Use of a probe provides the following advantages.

• The voltage and current of the circuit to be measured are not disturbed.

•A signal can be input without distortion.

• The measurement voltage range of the oscilloscope can be widened. A 200 MHz passive probe is supplied with the instrument. The probe enables you to select whether the input signal is attenuated to 1/10 or 1/1*. When a probe is used, the probe attenuation must match the instrument’s attenuation setting so that the input voltage can be measured directly. When using the 200 MHz Passive Probe (voltage probe) that comes with the instrument, enter a setting of 10:1 or 1:1. The voltage probe settings that are available on the instrument are 1:1, 10:1, 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.

* For the differences in the specifications depending on the attenuation ratio, see page 3-10.

Bandwidth Limit <Section 5.7>

The bandwidth limit can be set for each channel. The DL1620/DL1640/DL1640L combines the common analog filters with FIR and IIR filters, allowing you to select the 20 MHz, 1.28 MHz, 640 kHz, 320 kHz, 160 kHz, 80 kHz, 40 kHz, 20 kHz, and 10 kHz bandwidth limits.

• Full: Bandwidth is not limited.

• 20 MHz: Analog and FIR filters are used to limit bandwidth.

• 10 kHz to 1.28 MHz: Analog, FIR, and IIR filters are used to limit bandwidth.

Functions

Analog Filter

When using the analog filter independently, the cutoff frequency (3-dB attenuation) is approximately 24.2 MHz, but when combined with the FIR filter, it becomes approximately 20 MHz.

FIR (Finite Impulse Response) Filter

The FIR filter is a secondary filter that uses data sampled at 200 MHz to filter a weighted moving average. The calculation is done according to the following equation:

=(X

+2×X

n-2

n-1+Xn

)/4

where:

is the nth filtered data

is the nth data before filtering

is the (n-1)th data before filtering

n-1

is the (n-2)th data before filtering

n-2

The cutoff frequency becomes approximately 20 MHz when combined with the analog filter.

IIR (Infinite Impulse Response) Filter

The IIR filter is a secondary filter that filters data sampled at 100 MHz. Depending on the settings, the following cutoff frequencies are available:

1.28 MHz, 640 kHz, 320 kHz, 160 kHz, 80 kHz, 40 kHz, 20 kHz, 10 kHz

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The attenuation characteristic is 40 dB/decade.

1-7

1.3 Setting a Trigger

Trigger Type <Chapter 6>

There are two principal trigger types which you can use with the instrument. Simple trigger Enhanced trigger

Simple Trigger → Sections 6.5 to 6.7

This is an edge trigger and the one which is used normally.

Enhanced Trigger → Sections 6.8 to 6.14

This is a complex trigger. The following seven types of enhanced trigger are available. A→B(N) trigger A Delay B trigger Pattern trigger Width trigger OR Trigger Window trigger TV trigger

Edge Trigger → Section 6.5

The edge trigger is the simplest type of trigger and uses a single trigger source to activate a trigger. A trigger is activated when the trigger source exceeds (rises above) or drops (falls) below the preset trigger level*. In addition to input signals (CH1 to CH4, or CH1 and CH2 for the DL1620), the external trigger input signal, the commercial power supply signal that is used by the instrument can be used as a trigger source.

* “A trigger is activated” refers to the condition in which trigger conditions are satisfied and a

waveform is displayed.

Trigger Level

Trigger Source

A trigger is activated at this point if “Rise” ( ) is selected.

A → B(N) Trigger (Enhanced Trigger) → Section 6.8

This function activates a trigger the Nth time condition B becomes true after condition A has become true.

CH1

CH2

Trigger

CH1 CH2

When pattern A: CH1 = L, CH2 = L, Enter, When patternB: CH1 = H, CH2 = H, Enter, N = 3 L: Low level, H: High level

HL L

HHHHLLL

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

Pattern A is True

LH HL L

1-8

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1.3 Setting a Trigger

A Delay B Trigger (Enhanced Trigger) → Section 6.9

This function activates a trigger the first time condition B becomes true after condition A becomes true and the specified time elapses.

CH1

CH2

Trigger

CH1 CH2

HL L

HHHHLLL

Pattern A is True Pattern B is True

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

1 µs

LH HL

H L

Pattern Trigger (Enhanced Trigger) → Section 6.10

Multiple trigger sources are selected, and a trigger is activated when all of the trigger conditions set for each trigger source become true or false. Trigger conditions are established by setting combinations of the state (High or Low) of each trigger source. Furthermore, one of the trigger sources can be used as the clock signal, and triggering is synchronized with this clock signal.

Example: a trigger is activated when CH1: L, CH2: L, CH3*: H and CH4*: L(* The DL1620 is not equipped with channels 3 and 4.)

CH1

Functions

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CH2

CH3*

CH4*

CH1

LH L L L CH2 CH3* CH4*

HHHHLLLL

HLL

Trigger is activated.

L HLLH

Pulse Width Trigger → Section 6.11

The time period during which the specified condition is met or not met is compared with the specified time period. The trigger condition is set with the AND of the signal state of each channel (High, Low, or Don’t Care) or the AND of the window conditions of each channel (IN, OUT, or Don’t Care).

CH1

CH2

CH1 CH2

500 ns

450 ns

300 ns

LHHLL

400 ns

1-9

1.3 Setting a Trigger

The description of the figure above is as follows. If CH1 = H, CH2 = L, CH3 = X, CH4 = X, Condition = True, Time = 350 ns: (The DL1620 is not equipped with channels 3 and 4.) The trigger is activated at point B if Pulse < T. The trigger is activated at points A and C if Pulse > T. The trigger is activated at point C if T1 < PLS < T2 where Time1 = 350 ns, Time2 = 450 ns. The trigger is activated at points A, B, and D if T1<PLS<T2 where Time1 = 350 ns, Time2 = 450 ns. The trigger is activated at point D if “Time out” is specified where Time = 450 ns.

OR Trigger (Enhanced Trigger) → Section 6.12

A trigger is activated when any of the edge trigger conditions specified on CH1 to CH4(or CH1 and CH2 for the DL1620) or the window condition is met. A trigger can be activated by either the rising edge of CH1 or CH2.

CH1

CH2

Tigger

When CH1 = and CH2 =

TiggerTigger

Window Trigger (Enhanced Trigger) → 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). It is possible to combine the use of the Window trigger with the OR or Pulse Width trigger.

Center

Width

Trigger is activated

Window

Trigger is activated

OUT

Center

Width

Trigger is activated

Window

TV Trigger (Enhanced Trigger) → Section 6.14

The TV trigger is used when you are observing a video signal, and is compatible with broadcasting systems such as NTSC, PAL, etc.

1-10

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Half the Amplitude

Trigger Level Amplitude

1.3 Setting a Trigger

Trigger Mode <Section 6.1>

Conditions for updating displayed waveforms are set. The following five types of trigger mode are available:

Auto Mode

Displayed waveforms are updated each time a trigger is activated within a specified time (approximately 100 ms, referred to as the time-out period) and are updated automatically after each time-out period.

Auto Level Mode

Waveforms are displayed in the same way as in Auto mode if a trigger is activated within the time-out period. If no trigger is activated, the center value of the amplitude of the trigger source (section 1.3) is detected and the trigger level is changed automatically to this center value, then a (edge) trigger is activated to update the displayed waveforms.

Normal Mode

Displayed waveforms are updated only when a trigger is activated. Displayed waveforms will not be updated if no trigger is activated.

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.

Functions

Single (N) Mode

This mode is useful when using the sequential store function (see section 7.3). Waveforms are acquired and stored in different memory areas each time a trigger is activated, then acquisition stops, and the waveforms are displayed. Acquisition is performed the specified number of times. Acquired waveforms can be displayed together, or they can be displayed individually. This mode is useful when you want to detect a sudden abnormality in a waveform.

1st Acquisition 2nd Acquisition Nth Acquisition

Action-On Trigger <Section 6.15>

The displayed waveform can be output to the optional built-in printer, buzzer, or saved to a floppy disk, a Zip disk, or a PC card each time a trigger is activated. Also sends a mail (Ethernet interface (option)).

Trigger Coupling <Sections 6.5, and 6.8 to 6.13>

Input coupling can also be switched for trigger sources as it is for input signals. Select the type of input coupling which is most suitable for the trigger source signal. The following two types of input coupling are available for trigger source signals.

• DC: The trigger source signal is used as the trigger source without any process.

• AC: The trigger source signal is used as the trigger source after DC the content has been removed from it. A trigger can always be activated if the trigger level is set to 0 V as long as the signal’s amplitude is one division or more.

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1-11

1.3 Setting a Trigger

HF Rejection <Sections 6.5, and 6.8 to 6.13>

Set HF rejection to ON when you want to remove high frequencies exceeding 15 kHz from the trigger source. This prevents a trigger from being activated unexpectedly due to high-frequency noise.

Trigger Hysteresis <Sections 6.5, and 6.8 to 6.13>

If the trigger level width is not sufficient, the trigger point fluctuates each time a trigger is activated if noise is present in the trigger source, thereby resulting in unstable displayed waveforms. To solve this problem, a specified margin (hysteresis) can be added to the selected trigger level. The hysteresis level can be chosen from “ ” and “ .” If “ ” is selected, a wide hysteresis level is provided to eliminate fluctuation in the trigger point, thereby resulting in a stable displayed waveform. However, in this case, the trigger points become uncertain. Thus, select “ in a waveform.

” if you want to activate a trigger to detect small fluctuations

Hysteresis Width

Trigger is activated

Trigger Source and Trigger Level <Sections 6.5 to 6.13>

Trigger Source: Selects the signal for the selected trigger type. The external trigger

signal or the commercial power supply signal can also be used a trigger source.

Trigger Level: Sets the voltage level used to judge trigger conditions such as trigger

slope (rise/fall of a signal).

Trigger Hold-Off <Section 6.4>

The trigger hold-off function temporarily stops detection of the next trigger once a trigger has been activated. For example, when observing a pulse train signal, such as a PCM code, display of the waveform can be synchronized with repetitive cycles; or when using the history memory function, you may want to change the repetitive period, as shown below.

Trigger Level

Input Signal

Repetitive Period: T

1-12

Trigger Ssource Signal

Trigger Signal Restricted by Hold-Off Time “t” (When “Rise” is selected as the trigger slope)

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1.3 Setting a Trigger

Trigger Delay <Section 6.2>

Normally, the waveform around the trigger point is displayed. However the trigger delay function enables display of a waveform which has been acquired after a specified time (called the delay time) has elapsed following activation of a trigger. The range for the trigger delay setting is 0 to 4 seconds.

Delay Time

Trigger Point

Trigger Position <Section 6.3>

The trigger position indicates which position of the waveform in the acquisition memory will actually be displayed on the screen. The trigger point refers to the point at which a trigger is activated. In case the trigger delay (to be explained here after) is set to 0s, the trigger point and the trigger position see the same location. You use this setting to select how much pre-trigger area and how much post-trigger area to show on the display.

Display Record Length

Pre-Trigger Range Post-Trigger Range

Trigger Position

Functions

T (Trigger Position)

100%

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1-13

1.4 Setting the Acquisition and Display Conditions

Record Length <Section 7.1>

The term “record length” refers to the number of data points (per channel) acquired in the acquisition memory. “Displayed record length” refers to the number of these data points that are actually displayed on the screen. (Note that sampling rate and record length will vary according to the time axis setting; see section 1.2.) It is possible to set the following record lengths. (The maximum record length that can be set varies depending on the status of the high-resolution mode.) DL1620/ : 1 kword, 10 kwords, 100 kwords, 1 Mword, 8 Mwords (in high-resolution DL1640 mode 4 Mwords). DL1640L : 1 kword, 10 kwords, 100 kwords, 1 Mword, 4 Mwords, 10 Mwords,

32 Mwords (in high-resolution mode 16 Mwords). The displayed record length is identical to the (acquisition) record length. For details, see Appendix 1.

High-resolution mode <Section 7.4>

Ordinarily, data converted to digital values by the 8-bit A/D converter is processed according to the settings and saved by the device as 8-bit data in the acquisition memory. For filtering that uses the FIR filter or IIR filter digital calculation methods, data is processed at 8 bits or higher to minimize calculation errors. Further, limiting the bandwidth improves the S/N ratio and enables data exceeding 8 bits in length. Using the DL164/DL1640L, the S/N ratio can be improved to allow data of up to about 13 bits. When the high-resolution mode is ON, calculated data is saved in acquisition memory as 16-bit data. Therefore, data obtained through filtering that exceeds 8 bits can also be saved. However, when the bandwidth limitation is set to Full, the resolution does not improve even if the high-resolution mode is ON because there is no filtering. When the high-resolution mode is ON, the following restrictions apply. These restrictions do not apply when high-resolution mode is OFF.

• The maximum sampling rate of the real-time sampling mode is halved (100 MS/s)

• The maximum recording length is halved (DL1620/DL1640: 4 Mwords/CH; DL1640L:

16 Mwords/CH)

• The number of triggers that can be held in history memory is halved

1-14

When the high-resolution mode is OFF, all data is saved as 8-bit data, regardless of bandwidth limit settings.

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1.4 Setting the Acquisition and Display Conditions

Acquisition Modes <Section 7.2, 7.4>

When storing sampled data in the acquisition memory, it is possible to perform processing on specified data and display the resultant waveform. The following data processing methods are available.

Normal Mode

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

Averaging Mode

Averaging is a process in which waveforms are acquired repeatedly to obtain the average of waveform data of the same timing (the same time in relation to the trigger point). If this mode is active, the instrument takes the linear or exponential average of incoming data and writes the results into acquisition memory. You can set an average count of Infinite for exponential averaging, or in the range from 2 to 65536 (in 2n steps where n is a natural number) for simple averaging. Set the attenuation constant for exponential averaging in the range from 2 to 256 (2n steps where n is a natural number).

Exponential Averaging (Count = Infinite)

An = {(N - 1) An - 1 + Xn}

: Value Obtained After nth Averaging

: nth Measured Value

: Attenuation Constant (2 to 256, in steps of 2

Functions

Linear Averaging (Count = 2 to 65536)

Σ Xn

n = 1

AN =

XnN: nth Measured Value

: Number of Averaging Times

)

(Acquisition Count, in steps of 2n)

This averaging process is useful when you want to eliminate random noise.

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 “Relationship between the time axis setting, sample rate and record length”). However, in the envelope mode, the maximum and minimum values are determined at every time interval from the data sampled at 200 MS/s (high-resolution mode: 100 MS/s). The time interval used to determine the values is the twice sampling interval of the normal mode. The maximum and minimum values are paired and acquired in the acquisition memory. Envelope mode is useful when you want to avoid aliasing (section 1.2), since the sample rate is kept high irrespective of the time axis setting (T/div). Furthermore, envelope mode is also useful when you want to detect glitches (pulsing signals which rise very fast) or display an envelope of a modulating signal.

Envelope

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1-15

1.4 Setting the Acquisition and Display Conditions

Sequential Store <Section 7.3>

In the real-time sampling mode, waveform data will be stored in the acquisition memory only a set number of times, and all waveforms can be displayed. This stops automatically after acquisition. The maximum acquisition count available with the feature varies depending on the record length. The range for the DL1620/DL1640 is 2 to 4000 times (for the DL1640L, it is 2 to 16000 times). Once the specified number of waveforms have been stored, you can display any of the waveforms individually or all of them together, so that it is possible to derive a time series of the waveform variation. The drawings below illustrate how stored data can be displayed (assuming sequential storage of 100 waveforms).

Display Example in Case Count = 100 Times Displaying All Waveforms

(ALL)

Displaying Newest Waveform (Selected Record No. = 0)

Displaying Oldest Waveform (Selected Record No. = –99)

Sampling Mode <Section 7.5>

As explained earlier in “Relationship between the time axis setting and sampling mode” (section 1.2), data sampling can be performed either in real-time or in repetitive sampling mode depending on the time axis and record length. The available time axis range under repetitive mode varies according to the acquisition settings. For details, see Appendix 1.

Accumulated Waveform Display <Section 8.6>

This mode holds each waveform on the screen for a time that is longer than the update cycle, so that multiple waveforms are overlapped. The waveform age can be identified by color. The following two modes are available.

• Persist: Overlaps the display of waveforms using the display color of each channel.

The intensity is gradually reduced, and the waveform disappears after the specified time.

• Color: Overlaps the display of waveforms using 8 colors which signify the

frequency of occurrence of the data values. This function is useful when you want to observe jitters and temporary turbulence in waveforms.

1-16

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1.4 Setting the Acquisition and Display Conditions

History Memory <Section 7.6>

The oscilloscope automatically retains the last N waveforms recorded. The value of N varies in the range 2 to 4000 for the DL1620/DL1640 (2 to 16000 for the DL1640L) depending on the record length and high-resolution mode. The oscilloscope retains all waveforms for the first N triggers; then, for each subsequent trigger, the oscilloscope overwrites the oldest stored waveform. You are free to switch the display from the current (newest) waveform to any of other N-1 waveforms in the history. The illustration below shows how data can be displayed, assuming N = 1024.

Saved Waveform Data of Previous 1024 Triggers

In addition, a particular waveform can be found from the past waveforms that are held.

Display Settings <Chapter 8>

Display Format → Section 8.1

• You can display waveforms from different channels in different windows. You can choose to use 1 window (Single), 2 windows (Dual), or 4 windows (Quad). (4 windows (Quad) is not available on the DL1620.)

• You can select either of the following two methods for assigning channels to windows. Auto: Channels that are set to ON are displayed in order of channel number, with the

lowest channel displayed in the top window.

Fixed: Channels are displayed in order of channel number, regardless of whether ON

or OFF.

User: Arbitrarily assign the channels to the split screens, regardless of wether or nor

the channel display is turn ON.

Functions

Current Waveform Display (Select Record = 0)

Selected Record No. 0

Any Former Waveform Display (Select Record is Selectable in the Range 0 to –1023)

Selected Record No. –25

IM 701610-01E

Graticule → Section 8.3

Use this feature to select use of grid, frame, or “cross” graticule.

Scale Values → Section 8.4

If the Scale Value setting is ON, the screen displays numerical values at the top and bottom of the vertical axis and the horizontal axis.

1-17

1.4 Setting the Acquisition and Display Conditions

Waveform Labels → Section 8.5

You can assign an arbitrary label (up to 8 characters) to each waveform.

Waveform Label

Scale Values

Selects use of 2 waveform windows.

Display Interpolation <Section 8.2>

This feature selects the type of interpolation applied in areas where there are less than 500 sample points (Less than 250 points in the zoom window when zooming on the waveform using Main & Z1 & Z2) per 10 time axis divisions. (These areas are referred to as interpolation areas.) Three settings are available.

Line Interpolation

Interpolates between two dots using a straight line.

Trigger Mark

Sine Interpolation

sin x

Generates interpolation data using the function

then interpolates between two dots

using resulting sine curve. Sine interpolation is suitable for observation of sine waves.

Pulse Interpolation

Interpolates between two dots using a step.

No Interpolation

Displays measurements as discrete dots, without interpolation.

1-18

IM 701610-01E

<Main>

<Main>

<Z1>

<Z2>

<Z1>

or <Z2>

1.4 Setting the Acquisition and Display Conditions

X-Y Waveform Display <Section 8.8>

This feature plots the voltage values of one input waveform (on the X axis) against the voltage values of the others (on the Y axis, which have their display turned ON). The XY plot lets you view the relationship between the signal voltages. The X-Y waveforms and normal waveforms (a waveform displayed using voltage and time axes) can be displayed simultaneously. Use of this X-Y waveform display function enables measurement of the phase angle between two sine wave signals. For example, two X-Y sine waveforms are displayed to obtain an X-Y waveform (called a Lissajous waveform), from which the phase angle can be obtained.

Lissajous Waveform

Phase Angle 0°

Phase Angle 45°

Phase Angle 90°

Frequency

Ratio

(X : Y)

1 : 1 1 : 2 1 : 3

Functions

Expanded Waveform <Section 8.9>

Waveforms can be expanded in the time axis direction. This function is useful when you want to change the T/div setting after the waveform has been displayed in single mode or when you want to extend the acquisition time to observe a particular part of the waveform thoroughly. Zooming is not available on areas with less than 11 data points. You set the zoom position according to its time axis location.

Zoom Display Arrangement

You can display one or two zoom windows on the screen. Four display arrangements are available, as follows. Main: Main area Z1, Z2: Zoom area

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1-19

1.4 Setting the Acquisition and Display Conditions

If you display the “main” area (normal waveform display) together with one or both zoom windows, the main area will include vertical lines (or “zoom boxes”) indicating the zoom area (s). The center of the zoom area corresponds to the center of the zoom box.

Main Waveform

Z1 Waveform

Z1 Box

Z2 Box

Z2 Waveform

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1.5 Analyzing the Waveform

Linear Scaling <Section 5.10>

It is possible to append a scaling constant A, an offset value B and a unit to the measurement value X of cursor or automated measurements. Linear scaling is useful, when applying a voltage divider ratio to the measurement values. Linear scaling is also handy when you want to your scope to automatically convert the measured voltage results into the (for example, current or temperature) measurement unit of your signal source.

Y(UNIT) = AX + B Y = result of linear scaling

Cursor Measurements <Section 9.1>

You can use the following cursor types to analyze the waveform data.

•V Cursors (Vertical)

Two vertical broken lines (V cursors) are displayed. The time from the trigger position to each V cursor and the time difference between the V cursors are measured. In addition, the voltage of the signal at each cursor position and the voltage difference between the cursors are measured.

•H Cursors (Horizontal)

Two horizontal broken lines (H cursors) are displayed. The values in the vertical direction of each H cursor and the difference between the two are measured.

• Marker Cursors (Markers)

Use this feature to place one or two markers onto the waveform. You can then read the voltage value and time value (relative to trigger position) at each marker, and the voltage difference and time span between the markers.

• Angle Cursors (Degree)

Set the measurement zero point and the end point and then using the angle corresponding to the width between the two as a reference, measure the angle of the two angle cursors.

•H &V Cursors (H&V)

H cursors and V cursors are displayed simultaneously.

• Statistical Processing of Historical Data (Vertical History)

Performs the V cursor measurements of the waveform acquired using the history memory function and, calculates the maximum and minimum values, mean value, and standard deviation.

Functions

IM 701610-01E

For V Cursors

Measurement Value of Cursor

Cursor1

For Marker Cursors

Cursor2

Marker1

Marker2

Marker4

Marker3

Measurement Value of Cursor

1-21

1.5 Analyzing the Waveform

Automated Measurements <Section 9.2 to 9.4>

Automatic Measurement of Waveform Parameters → Section 9.2

This feature automatically measures selected waveform parameters, such as rise time and pulse width. You can select parameters separately for each channel, although you are limited to a total of 12 parameters to display. There are 27 parameters available for selection. The measurments are made for data in the acquisition memory.

Statistical Processing → Section 9.3

Statistical processing is performed on the automated measured values described above. The following five statistics are 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

Automatic Measurement Value of the Statistical Processing Parameters

Statistical Processing Results

The following three methods are available in the statistical processing.

• Normal Statistical Processing

While acquiring waveforms, statistical processing is performed on all the waveforms acquired up to that point.

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1.5 Analyzing the Waveform

• Statistical Processing for Each Period

Divides the displayed waveform using a period that is automatically calculated and performs statistical processing on the measured values over the determined period. Statistical processing is performed from the oldest measured data of the displayed waveform.

Example in which CH1 is selected as the target waveform for determining the period

CH2

CH1

The parameters for automated measurement are measured in each range a, b, and c, and statistical processing is performed on each automated measurement parameter in the order a, b, and c. Automated measurement parameters of other channels are also measured over each range a, b, and c. Automated measurement can also be performed on the period of each waveform.

Functions

• Statistical Processing of Historical Data

Performs automated measurement of waveform parameters on the waveform that is acquired using the history memory function and performs statistical processing. Statistical processing is performed from the oldest waveform.

Perform Automated Measurements of Waveform Parameters on Dual Areas → Section 9.4

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. Statistical processing for each period is not possible.

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1-23

1.5 Analyzing the Waveform

Waveform Math <Chapter 9>

Addition, Subtraction, and Multiplication → Section 9.5

Addition, subtraction, and multiplication can be performed between CH1 and CH2 with Math1, and CH2 and CH3 for Math2 (or CH1 and CH2 with Math1 for the DL1620). The result is displayed as waveform Math1 or Math2 (or waveform Math1 on the DL1620). Addition and subtraction are useful for comparing signals to the standard signal, checking the signal logic, and comparing signal phases. Multiplication is useful for checking power signals by applying voltage and current signals.

Addition-

Computed Waveform

Subtraction-

Computed Waveform

Multiplication-

Computed Waveform

Scaling of Math1 and Math2 Waveforms → Section 9.5 to 9.6

The instrument normally auto scales when displaying the computed waveform, but manual scaling can also be selected. If you select auto scaling, the center value and sensitivity suitable for displaying the waveform is calculated from the voltage axis, offset voltage, type of computation, and other factors of the waveform being computed. If you select manual scaling, then the center value and sensitivity of the computed waveform display can be set to any desired values.

Phase-Shifted Addition, Subtraction, and Multiplication → Section 9.8

Displays the phase-shifted waveforms of CH1 to CH4 or performs a computation using the phase-shifted waveforms (or CH1 and CH2 for the DL1620).

1-24

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1.5 Analyzing the Waveform

Power Spectrum Display <Section 9.6>

FFT (Fast Fourier Transform) computation can be performed on the input signal to display its power spectrum. This is useful when you want to check the frequency distribution of the input signal.

Power Spectrum Waveform

Three time windows are available: a Rectangular window, a Hanning window, and a Flattop window. The Rectangular window is effective for transient signals, such as impulse waves, which attenuate completely within the time window. The Hanning window allows 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 effective for continuous signals. The frequency resolution of the Hanning window is higher than that of the Flattop window. However, the level accuracy of the spectrum of the Flattop window is higher than that of the Hanning window. When the waveform being analyzed is a continuous-type signal, select the appropriate window that suits the application. FFT computation generates 1000 or 10000 measurement data points, but only half points are displayed on the screen.

Window Integral Power Spectrum

Rectangular

Window

Functions

IM 701610-01E

Sine Wave

Hanning Window

Flattop Window

Rectangular Window

Hanning Window

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

Step Function

sin{2π(1–2t/T)}

2π(1–2t/T)

FFT Function

When the complex result of FFT computation is G = R + jI, the power spectrum can be expressed as follows.

DC component: 10 log(

R2 + I

) AC component: 10 log

R2 + I

( )

R: Real Part I: Imaginaly Part Reference (0dB) for Log Magnitude: 1Vrms

1-25

1.5 Analyzing the Waveform

Data Search (History Search Function) <Sections 7.7 to 7.8>

This feature can be used to search waveforms that match the specified conditions from the history memory.

History Memory Search Using Zone → Section 7.7

Searches waveforms that did or did not pass through the specified area from the history memory.

Waveform that was Saved Using the History Memory Function

Specified Area

Selected Record No. 0

Detects Waveforms that did or did not Pass through the Specified Area

Selected Record No. –25

History Memory Search Using Waveform Parameters → Section 7.8

Searches waveforms that did or did not satisfy the specified condition from the history memory.

Waveform that was saved using the history memory function

Item Setup : P-P Condition : OUT

Start RecEnd Rec

Detects position

T-Range2

T-Range1

Selected Record No. 0

P-P

Selected Record No. 28

Data Search (Search and Zoom Function) <Section 8.10>

Edge Search

Searches the position where the signal went above (rising) or below (falling) the specified level the specified number of times from the search start position. Displays the waveform expanded around the detected position in the zoom window.

Start Point of the Dearch

Hysteresis

Detected Position

Specified Level

1-26

The section that is detected is expanded and displayed in the zoom window

When the edge is set to rising and the count is set to 2

IM 701610-01E

LHLL L

Status (Pattern) of CH2

Specified Status (Pattern)

Conditions: Clock Channel : CH1 Timing to Check the Status : Rising Channel on which to Perform the Search : CH2

CH1

Level

CH2

Low Level

High Level

LL L

Searches Sections of the Waveform with the Same Status (up to 64 Patterns) as the Specified Waveform Pattern

The Section that is Detected is Expanded and Displayed in the Zoom Window

1.5 Analyzing the Waveform

Serial Pattern Search

Searches for a section of the waveform that has the same pattern as the specified waveform pattern (specified using High or Low status or Don’t Care). The status of the waveform (64 statuses) is detected at the rising or falling edge of the channel that is specified as the clock channel or at a constant time interval. The matched pattern is displayed expanded in the zoom window.

Parallel Pattern Search

Detects a section of the waveform where the status (specified as High, Low, or Don’t Care) of each channel, CH1 through CH4, Math1, and Math2 (or CH1, CH2 and Math1 for the DL1620), is the same as the specified status. The status is detected at the rising or falling edge of the channel that is specified as the clock channel. If the clock channel is set to None, detection is performed on the status of all waveforms, CH1 through CH4, Math1, and Math2 (or CH1, CH2 and Math1 for the DL1620). The detected section is displayed expanded in the zoom window.

Functions

• Search Example in which the Clock Channel is Set to None

H1: L, CH2: L, CH3*: H, and CH4*: L

CH1

CH2

CH3*

CH4*

CH1

LH L L L CH2 CH3* CH4*

L: Low Level, H: High Level

* The DL1620 is not equipped with channels 3 and 4.

HHHHLLLL

HLL

L HLLH

Detects this Position and Displays the Waveform Expanded in the Zoom Windo

and

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1-27

1.5 Analyzing the Waveform

• Example in which the clock channel is set to CH1

CH1: rising, CH2: L, CH3*: H, and CH4*: L

and

CH1

CH2

CH3*

CH4*

CH2 CH3* CH4*

L: Low Level, H: High Level

* The DL1620 is not equipped with channels 3 and 4.

HHHHLLLL

HLL

HLLH

Detects this Position andDisplays the WaveformExpanded in the Zom Windo

Pulse Width Search

From the search start position, search for a portion of the waveform containing a pulse which is longer or shorter than a previously defined length of time. Expand the retrieved portion of the waveform per the zooming factor and display it in the waveform zoom display window.

T T

T 2

T 1

T 2

T 1

Pulse <T

Pulse > T

T 1

T 2

T 1

1-28

T1 < PLS < T2

T 1

T 2

T 1

IM 701610-01E

T 2

T 1

T1 < PLS < T2

Time Out

Zoom Screen Center Position

Starting Point for Next Search

Pulse : The Length of Time a Specified Condition is Fulfilled T : A S

T 2

T 1

ecified Length of Time

T 2

T 1

1.5 Analyzing the Waveform

Auto Scroll

The zoom box scrolls automatically in a designated direction. You can stop the zoom box while checking zoomed waveforms.

Functions

IM 701610-01E

1-29

1.6 Communications

Ethernet Interface (Option)

Saving and Loading to and from a Network Drive (FTP Client Function) → Sections 13.3, 13.4

You can save, delete, and copy waveform data, screen image data, and setting information onto the hard drives of devices on the network such as a PC or workstation running the FTP server function just as you would onto internal floppy disks, Zip disks, or PC cards.

DL1620/ DL1640/ DL1640L

File Retrieval from the DL1620/DL1640/DL1640L Floppy Disk, Zip Disk, or PC Card (FTP Server Function) → Section 13.8

You can download files from the internal floppy disk, Zip disk, or PC card of the DL1620/ DL1640/DL1640L using a networked PC or workstation acting as the client.

File

Personal

Computer

DL1620/ DL1640/ DL1640L

File

Personal

Computer

Outputting to a Network Printer (LPR Client Function) → Section 13.5

You can print screen images to a network printer just as you would to the DL1620/ DL1640/DL1640L’s built-in printer or to a printer with a USB interface.

DL1620/ DL1640/ DL1640L

Printer

1-30

IM 701610-01E

1.6 Communications

Mail Transmission (SMTP Client Function) → Sections 13.6, 13.7

You can send transmissions to a given e-mail address at specified intervals. Using this function, you can periodically transmit such information as GO/NO-GO results and the measurement rate.

DL1620/ DL1640/ DL1640L

E-mail

Personal

Computer

Web Server Function → Section 13.12

You can use the DL1620/DL1640/DL1640L as a Web server. From the DL1620/DL1640/ DL1640L Web page you can transfer files, monitor waveform display, perform basic DL1620/DL1640/DL1640L key operations, and acquire waveform data.

DL1620/ DL1640/ DL1640L

Personal

Computer

Functions

Network Interface → Communication Interface User’s Manual (IM701610-17E)

You can output waveform data to a PC for analysis using the Ethernet interface, or perform waveform measurement by controlling the instrument with an external controller.

Serial, GP-IB (Option), and USB (Option) Interfaces

A serial (RS-232C) interface comes standard with the DL1620/DL1640/DL1640L. GP-IB and USB interfaces are also available as options. Through communication functions, you can output waveform data to a PC for data analysis or control the DL1620/DL1640/ DL1640L using an external controller to carry out waveform measurements.

DL1620/ DL1640/ DL1640L

Communication

Interface

Personal

Computer

IM 701610-01E

1-31

1.7 Other Useful Functions

Connecting a USB Keyboard (Option) <Section 4.1>

You can connect a USB keyboard for entering file names, comments, and other information. In addition, the keys on the keyboard are assigned to the keys on the front panel of the DL1620/DL1640/DL1640L, which allows you to operate the DL1620/ DL1640/DL1640L in a similar fashion. (See Appendix 5.)

USB Keyborad

USB connection

Connecting a USB Mouse (Option) <Section 4.1>

You can connect a USB mouse to use the menu screen of the DL1620/DL1640/ DL1640L.

Initialization <Section 4.2>

This function resets the key settings to the factory settings (default settings), and is useful when complex settings have been made and you want to cancel all of them at once. However, settings related to communications and setting parameters on storing and recalling function are not reset.

DL1620/ DL1640/ DL1640L

Auto Setup <Section 4.3>

This function makes settings automatically such as vertical sensitivity, time axis and trigger settings, to suit the signal to be measured. This is useful when the signal to be measured is unknown. However, there might be particular signals for which the auto setup function may not work properly.

Storing and Recalling Setting Parameters <Section 4.4>

You can store setting parameters to the internal memory. The stored parameters can also be recalled to modify the settings on the instrument.

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1.7 Other Useful Functions

Snapshot <Section 4.6>

If single start is not selected, a waveform is updated at the specified intervals or is displayed in roll mode. Thus, to retain the currently displayed waveform, acquisition must be stopped. Use of the snapshot function allows the currently displayed waveforms to remain temporarily on the screen without acquisition being stopped. To activate this function, just press SNAP SHOT without stopping acquisition. The currently displayed waveform will be retained. This waveform is called a snapshot waveform. The snapshot waveform is displayed separately in white making comparison between the two easier. Snapshot waveforms are screen image data, so they cannot be used for cursor measurement or automated measurement. However, screen image data output (hard copy) is possible.

Functions

Snapshot Waveform

Clear Trace <Section 4.6>

This function clears all waveforms other than the loaded waveforms and restarts the averaging, repetitive sampling, and accumulation in a signal operation.

Preset <Section 5.6>

This feature automatically sets the V/div, input coupling, trigger level, and other parameters to appropriate values for 5-V or 3.3-V CMOS signals, or 700937, 701930, 701931, 701932, or 701933 current probes (Optional Accessories).

GO/NO-GO Determination <Section 9.9, 9.10>

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.

IM 701610-01E

1-33

1.7 Other Useful Functions

Displayed Data Output Functions <Chapter 10>

You use these functions to print the screen image to the optional built-in printer, or an external USB printer or a network printer, to save the image data to the storage medium (internal flash memory, floppy disk, Zip disk, PC card, or network drive (Ethernet interface option)). Also, the instrument can display a thumbnail (miniature sample) of the screen data saved to the storage medium. This is useful for checking the contents of saved image data files.

DL1620/ DL1640/ DL1640L

Printer

Note

The instrument provides a function which enables you to use the keyboard displayed on the screen or the USB keyboard to enter and display a comment. If you enter a comment which indicates the contents of the displayed waveforms before printing a hard-copy, it will help you to distinguish between different printouts.

Floppy Disk Drive, Zip Drive, or PC Card Interface

Storage Medium Saves and Loads <Chapter 11>

The instrument standard configuration includes a floppy disk drive, Zip drive, or PC card, and the optional configuration includes an Ethernet connector. If you do not have a floppy disk, Zip disk, or PC card handy, you can use the 2-MB internal flash memory. In addition, a USB storage device (MO disk drive, hard disk, or flash memory) can be connected to the USB PERIPHERAL interface. It is possible to save or load data on a floppy disk, Zip disk, PC card, internal flash memory, USB storage, or network drive. You can save data in any of the following formats: PostScript, TIFF, BMP, JPEG, and PNG. This means that you can easily insert the saved images into documents produced with conventional DTP software packages.

DL1620/ DL1640/ DL1640L

USB storage

(MO/HDD/

Flash memory)

You can normally rewrite to the internal flash memory approximately 100000 times. However, this number can deteriorate and become less. Therefore, do not overly rewrite to the internal flash memory.

Personal Computer

Floppy Disk,

Zip Disk, or

PC Card

1-34

IM 701610-01E

Chapter 2 Name and Use of Each Part

2.1 Front Panel/Rear Panel

Front View

Esc Key

Closes pop-up menu or soft key menu.

LCD Screen

Menu keys (Section 2.2)

Press a key to display the corresponding menu.

VERTICAL Group (Section 2.2)

Menu group used to make settings for the vertical axis.

HORIZONTAL Group (Section 2.2)

Menu group used to make settings for the horizontal axis.

Power Switch (Section 3.3)

DL1620

Rear View(-AC model)

Floppy Disk Drive, Zip Drive, or PC Card Interface (Chapter 11)

Jog Shuttle

Changes the selected value or moves the cursor. The more the shuttle ring (outer ring) is turned, the more the setting increment increases.

TRIGGER Group

CLEAR TRACE

HISTORY

MEASURE

CURSOR

X - Y

VERTICAL

PRESET

POWER

MATHMISCFILE

GO/NOGO

PHASE

HORIZONTAL

TIME DIV

ACQ START/STOP

SHIFT

TRIGGER

TRIG D

ZOOM

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

IMAGE SAVE

VDIV

SNAP

HELP

SHOT

SELECTRESET

COMP

(Section 2.2)

Menu group used to make trigger settings.

COMP Output (Section 3.5)

Outputs probe phase compensation signal.

Ground Connector

Ground connection used for probe phase compensation.

Input Terminals (Section 3.4)

POWER

Used to connect a probe.

(The DL1620 is not equipped with channels 3 and 4. Instead, an external trigger/external clock multi-purpose terminal is installed in place of the CH4 terminal.)

Name and Use of Each Part

Power Connectors for the Probes (Section 3.4, option)

Provides power to YOKOGAWA differential probes or current probes.

USB PERIPHERAL Connector

Connects to a USB printer, USB keyboard, USB mouse, or USB storage.

USB Interface Connector

For details about communication functions, refer to the communication Interface Manual (Doc. IM701610-17E).

GO/NO-GO Output Terminal (Section 9.14)

Outputs the GO/NO-GO judgements.

RGB VIDEO OUT Terminal (Section 12.3)

DL1620

USB PREPHERAL

Power Connector (Section 3.3)

Main Power Switch (Section 3.3)

Ethernet Connector (Chapter 13, Option) or GP-IB Connector (Option)

For details about the communication functions, refer to the Communication Interface Manual (IM701610-17E).

Serial (RS-232) Interface Connector

For details about the communication functions, refer to the Communication Interface Manual (IM701610-17E).

CH1 OUT Connector

Trigger Output Terminal (Section 12.2)

External Trigger/Clock Mutual Input Terminal (Sections 5.11, 6.6, and 12.1) (On the DL1620 it is labeled as EXT. and is located on the front panel.)

IM 701610-01E

2-1

2.1 Front Panel/Rear Panel

Rear View(-DC model(701610/701620))

Power Connectors for the Probes (Section 3.4, option)

Provides power to YOKOGAWA differential probes or current probes.

USB PERIPHERAL Connector

Connects to a USB printer, USB keyboard, USB mouse, or USB storage.

USB Interface Connector

For details about communication functions, refer to the communication Interface Manual (Doc. IM701610-17E).

GO/NO-GO Output Terminal (Section 9.14)

Outputs the GO/NO-GO

udgements.

RGB VIDEO OUT Terminal (Section 12.3)

USB PREPHERAL

Circuit Breaker Protective grounding Terminal Power Connector

(Section 3.3) Main Power Switch

(Section 3.3)

Ethernet Connector (Chapter 13, Option) or GP-IB Connector (Option)

For details about the communication functions, refer to the Communication Interface Manual (IM701610-17E).

Serial (RS-232) Interface Connector

For details about the communication functions, refer to the Communication Interface Manual (IM701610-17E).

CH1 OUT Connector

Trigger Output Terminal (Section 12.2)

External Trigger/Clock Mutual Input Terminal (Sections 5.11, 6.6, and 12.1) (On the DL1620 it is labeled as EXT. and is located on the front panel.)

Top View

Handle

Use the handle to lift and carry the unit.

Built-In Printer (Option)

2-2

IM 701610-01E

2.2 Operation Keys/Jog Shuttle/Knobs

VERTICAL Group

CH1 to CH4 Keys (Sections 5.1 to 5.5, 5.7 to 5.10) On the DL1620, the CH3 and CH4 keys are disabled.

Displays a menu used to turn ON/OFF the display on each channel, set the vertical position, coupling, probe attenuation, offset voltage, bandwidth limit, inversion, expansion/reduction of the vertical axis, linear scaling, and waveform labels. In addition, by pressing this key before operating the V/DIV knob, the channel that is to be controlled by the V/DIV knob can be selected.

PRESET Key (Section 5.6)

Displays the preset menu that sets the V/div, input coupling, probe attenuation and trigger level to the optimum 5 V CMOS, 3.3 V CMOS, or the current probe (700937,

701930) (or preset level) automatically. This preset menu allows you to set all channels or the selected channels at once.

V/DIV Knob (Section 5.8)

Turning this knob during acquisition (i.e. while the START indicator is lit) sets the voltage axis sensitivity. Before turning this knob, be sure to select the channel you want to adjust by pressing the corresponding channel key (CH1 to CH4 (or CH1 and CH2 for the DL1620)).

VERTICAL

PRESET

VDIV

HORIZONTAL Group

HORIZONTAL

ZOOM

TIME DIV

TIME/DIV Knob (Section 5.12)

Use this knob to set the time scale. If you change the scale while acquisition is suspended, the new value becomes effective when acquisition resumes.

(SHIFT +) ZOOM Key (Sections 8.9, 8.10)

Displays a menu related to the waveform zoom display. Pressing the ZOOM key after pressing the SHIFT key displays a menu related to data searching (Search and Zoom Function).

Name and Use of Each Part

TRIGGER Group

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

IM 701610-01E

(SHIFT +) MODE Key (Sections 6.1, 6.15, 7.3)

Displays a menu used to select the trigger mode. Pressing the MODE key after pressing the SHIFT key displays a menu related to actionon-trigger.

SIMPLE Key (Sections 6.4 to 6.7)

Displays the menu for the simple trigger mode, which provides normal triggers such as the edge trigger. Simple trigger mode is selected when the indicator located above this key is lit.

ENHANCED Key (Sections 6.4, 6.8 to 6.14)

Displays the menu for enhanced trigger mode, which provides complex triggers such as the pattern trigger. Enhanced trigger mode is selected when the indicator located above this key is lit.

(SHIFT +) POSITION Key (Sections 6.2, 6.3)

Used to set the trigger position. You can set the trigger delay by pressing the POSITION key after pressing the SHIFT key.

TRG’D Indicator

Lights up when a trigger is activated.

2-3

2.2 Operation Keys/Jog Shuttle/Knobs

Other Menus

2-4

CLEAR TRACE

HISTORY

MEASURE

CURSOR

SETUP DISPLAY

GO/NO-GO

MATHMISCFILE

COPY

IMAGE SAVE

X - Y

PHASE

SHIFT

ACQ STAR T/ST OP

ESC

SNAP SHOT

SELECTRESET

HEL

DISPLAY Key (Sections 8.1 to 8.8)

Displays the screen display menu. Press SHIFT + DISPLAY to produce the menu for X-Y display setup.

MISC Key (Sections 3.6, 4.7, Chapters 13, 14, 15; IM701610-17E)

Displays the menu for selecting GO/NO-GO judgment, communication interface, system configuration settings, system status check, screensaver setting, and the self-diagnostic function.

FILE Key (Sections 11.5 to 11.13)

Displays the menus that you can use to save, load, or perform file operations with the internal flash memory, floppy disk, Zip disk, PC card, USB storage, network drive (when the Ethernet interface is installed).

(SHIFT+) COPY Key (Sections 10.2, 10.3, 13.5)

Used for printing out hard copy of the screen data. If you press SHIFT + COPY, the screen displays a menu that you can use to print or save the screen image. For the save location, you can select any of the following: internal printer (option), and USB printer.

(SHIFT+) IMAGE SAVE Key (Sections 10.4, 13.4)

You can store the screen image to an external storage medium. Press the SHIFT key followed by the IMAGE SAVE key to display a menu used to save the screen image data to internal flash memory, a floppy disk, Zip disk, PC card, USB storage, or network drive (when the Ethernet interface is installed).

MEASURE Key (Sections 9.2 to 9.4)

Displays the menu for performing automatic measurement of waveform parameters.

CURSOR Key (Section 9.1)

Displays the menu for cursor measurement.

(SHIFT+) MATH Key (Sections 9.5 to 9.8)

Displays the menu for waveform computation. Pressing the MATH key after pressing the SHIFT key displays a menu used to shift the phase.

GO/NO-GO Key (Sections 9.9, 9.10)

Displays a menu related to GO/NO-GO.

SETUP Key (Sections 4.2 to 4.4)

Displays a menu used to initialize the settings to factory defaults, perform auto setup, which automatically sets the DL1620/DL1640/DL1640L according to the input signal, store or recall setting parameters, and so on.

SHIFT Key

Used to make the functions that are marked in purple on the panel operative. Pressing this key activates shift mode, pressing it again releases shift mode. While the indicator above this key is lit, shift mode is active.

IM 701610-01E

2.2 Operation Keys/Jog Shuttle/Knobs

HISTORY Key (Sections 7.6 to 7.8)

Displays a menu used to recall data using the history memory function.

ACQ Key (Sections 5.11, 7.1, 7.2, 7.4, 7.5)

Displays the acquisition method menu.

START/STOP Key (Section 4.5)

Starts or stops acquisition according to the selected trigger mode. The indicator above this key is lit during acquisition.

Jog and Shuttle Dials (“jog shuttle”)

You use these dials to set numerical values, move the measurement cursors, select items from menus, and perform other such selection operations. The jog dial changes the value in fixed steps as you rotate it. With the shuttle dial, the step size increases as you turn the dial further.

RESET Key

Resets values that you have changed using the jog and shuttle dials.

SELECT Key

Activates the menu item that you have highlighted using the jog or shuttle dial.

Arrow Keys (< > keys)

Use these keys to shift the column position of the numerical value to be set by the jog or shuttle dial.

SNAP SHOT Key (Section 4.6)

Repeats acquisition while retaining the currently displayed waveform on the screen.

CLEAR TRACE Key (Section 4.6)

Deletes the currently displayed waveform.

HELP Key (Section 4.8)

Sets help window ON or OFF.

Soft Keys

Selects the menu that is displayed at the bottom of the screen.

Name and Use of Each Part

IM 701610-01E

2-5

2.3 Screens

A B

DEFGH

A Date and Time

For the procedures used to set the date and time, see section 3.6, “Setting the Date and Time.”

B Operation State

Displays “Running” when data acquisition is in progress and “Stopped” when it is stopped.

C Waveform Acquisition State and the Number of Acquisitions

Waiting for Trigger : trigger wait state Pre... : pre-trigger Post... : post-trigger Value : the number of waveforms acquired

D Display Position

Zoom Position

z1 z2

2-6

Display Record Length

< Zooming Waveform >

E Record Length F Sample Rate G Sampling Mode

Varies depending on the T/div and record length settings. Normal/Env/Avg Real-time sampling mode Norm: Rep Repetitive sampling mode Avg: Rep Repetitive sampling mode in the averaging mode

H T/div Setting that has been Changed after Waveform Acquisition I Trigger Level J Display Format

1, 2, and 4 windows are possible (or 1 and 2 windows bor the DL1620). (See section

8.1)

K Ground Level

IM 701610-01E

2.3 Screens

L Probe Attenuation, V/div, Input Coupling, and Bandwidth Limit Settings

If a signal exceeding approximately 10 div is input, the input coupling position overflow is indicated by a “ ”.

M Soft Key Menu N Trigger Level, Trigger Mode, Trigger Type, and Trigger Source Settings O Internal Processing Status

The current processing can be determined by the color of the “*”. Green : Performing an operation (power spectrum) or overwriting a history

waveform Yellow : Performing an automatic parameter measurement or a search Red : Sending e-mail, executing an FTP server function command, or HTTP

command

Note

Up to 40 pixels per million of the color LCD may be defective.

Name and Use of Each Part

IM 701610-01E

2-7

Chapter 3 Before Making Measurements

3.1 Precautions During Use

Safety Precautions

When you are using this instrument, read “Safety Precautions” on page v thoroughly, as well as the following points.

Do not Remove the Cover from the Instrument

Some parts of the instrument use high voltages, which are extremely dangerous. When the instrument needs internal inspection or adjustment, contact your dealer or nearest YOKOGAWA representative, as listed on the back cover of this manual.

In Case of Irregularity

If you notice smoke or unusual odors coming from the instrument, immediately turn OFF the main power and unplug the power cord. If such an irregularity occurs, contact your dealer or the nearest YOKOGAWA representative as listed on the back cover of this manual.

Power Cord

Nothing should be placed on the power cord. Also, it should be kept away from any heat sources. When unplugging the power cord from the AC outlet, never pull the cord itself. Always hold the plug and pull it. If the power cord is damaged, contact your dealer. See page ii for the part number to use when placing an order.

Before Making Measurements

General Handling Precautions

Observe the following precautions when handling the instrument.

Never Place Anything on Top of the Instrument

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

Do not Cause Shock to the Input Connectors or Probes

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 Screen

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.

When the Instrument is not going to be Used for a Long Period

Unplug the power cord from the AC outlet.

IM 701610-01E

3-1

3.1 Precautions During Use

Carrying the Instrument

Before carring the instrument remove the power cord and other cables. Always carry the instrument by the handles or carry it with both hands (see below).

Cleaning

When cleaning the case or the operation panel, unplug the power cord from the plug first, then wipe with a dry, soft, clean cloth. Do not use volatile chemicals such as benzene or thinner for cleaning, as this may lead to discoloration or deformation.

3-2

IM 701610-01E

3.2 Installation

Installation Conditions

The instrument must be installed in a place where the following conditions are met.

Flat Location

Set the oscilloscope in the proper direction and in a level and stable place. If placed in an unstable place, printing quality decreases.

Well-Ventilated Location

Vent holes are situated on the bottom. In addition, vent holes for the cooling fans are also situated in the rear sides. To prevent a rise in the internal temperature, the vent holes should not be blocked and sufficient clearance should be maintained around them. If a printer comes with your DL1620/DL1640/DL1640L, allow extra space for operation and do not place objects on top of the printer.

Before Making Measurements

5 cm

10 cm

5 cm

10 cm

IM 701610-01E

3-3

3.2 Installation

Ambient Temperature and Humidity

Ambient Temperature : 5 to 40°C Ambient Humidity : 20 to 80% RH (when not using the printer)

35 to 80% RH (when using the printer) No condensation should be allowed.

Note

• To ensure high measurement accuracy, the instrument should only be used under the following conditions. Ambient temperature: 23 ±5°C Ambient humidity: 55 ±10% RH

• Internal condensation may occur if the instrument is moved to another place where both the ambient temperature and humidity are higher, or if the temperature changes rapidly. In such cases allow the instrument to acclimatize to its new environment for at least one hour before starting operation.

Never Install the Instrument in the Following Places

In direct sunlight or near heat sources Where an excessive amount of soot, steam, dust or corrosive gases are present. Near magnetic field sources Near high voltage equipment or power lines Where the level of mechanical vibration is high In an unstable place

Installation Position

Place the instrument in a horizontal position or tilted using the stand, as shown below. When you use the stand, pull it forwards until it locks. To return the stand to its original position, push it backwards. When installing the DL1620/DL1640/DL1640L with the rear panel down, use the stand on the rear panel.

CAUTION

Do not use the Zip drive when the DL1620/DL1640/DL1640L is installed with the rear panel down.

Rubber Feet

3-4

If the instrument is installed in the tilted positon, rubber feet can be attached to prevent slipping. Four pieces of rubber feet are included in the package.

IM 701610-01E

3.3 Connecting the Power Cord

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, make sure that the source voltage matches the voltage of the power supply and that it is below the rated voltage of the power cord.

• Connect the power cord after confirming that the instrument power switch is OFF.

• Always use protective ground to prevent electric shock. Connect the instrument power cord to the 3-prong power outlet with grounding terminal.

• Do not use non-grounding extension cords or other measures that defeat the protective grounding.

• Never use an extension cord that does not have a protective grounding, otherwise the protection feature will be invalidated.

Before Making Measurements

Connecting the Power Cord(with the AC Power Model (-AC Suffix Code))

1. Make sure that main power switch and power switch are OFF.

2. Plug the power cord into the power connector socket on the rear panel of the instrument.

3. Plug the other end of the power cord into an AC outlet that meets the following conditions. The AC outlet must be of 3-prong type with a protective grounding 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 the built-in printer is used): 100 VA * The DL1620/DL1640/DL1640L can be used in 100-V and 200-V systems. Before using the

DL1620/DL1640/DL1640L, make sure that the source voltage matches the voltage of the power supply and that it is below the rated voltage of the power cord (see page ii).

3-prong AC Outlet

IM 701610-01E

Power Cord (Supplied)

3-5

3.3 Connecting the Power Cord

Connecting the Power Cord (with the DC Power Model (-DC Suffix Code))

When using the Battery Box (Model 701680, sold separately)

WARNING

• To avoid electric shock, ensure proper protective grounding of the DL1600.

When using the Yokogawa Battery Box (Model 701680), please refer to that instrument's user's manual.

When using a DC power supply other than the Battery Box (Model 701680)

WARNING

• To avoid electric shock, ensure proper protective grounding of the DL1600.

• To avoid electric shock, confirm that the power supply source is turned OFF before making connections.

• To avoid electric shock or fire, use a cable having a cross sectional area of 0.3 mm

(22 AWG) or more.

Attach the DC power supply and cable to the DC power supply connectors (part no. A1105JC) ahead of time, as shown in the figure below. Use a cable having a cross sectional area of 0.3 mm2 (22 AWG) or more.

Soldering

2 1

-(0VDC)

+(10 to 18VDC)

1. Check that the power switches on the instrument and DC power supply are turned OFF.

2. Connect the cable/connector assembled ahead of time according to the instructions above to the DC power supply connector on the instrument.

3. Connect the ends of the cable to a power supply meeting the conditions below.

Item Conditions

Rated supply voltage 12 VDC Operating supply voltage 10 to 18 VDC Power consumption 60 VA max.

Note

• If the power supply voltage falls between 10 VDC and 11 VDC, a message appears on the

DL1600 screen indicating that the power supply voltage is low.

Turning ON/OFF the Main Power Switch

Main power switch (rear panel on the right): Press the switch to the left to turn it ON; press the switch to the right to turn it OFF.

3-6

IM 701610-01E

Turning ON/OFF the Power Switch

OFF ON

Do not turn the power ON or OFF when the Zip drive is installed, as this could damage the drive. To avoid damaging the Zip drive, remove it before turning the power ON or OFF.

Items to be Checked before Turning ON the Power

Check that the instrument is installed correctly as instructed in section 3.2, “Installation.” Check that the power cord is connected correctly as sown in section 3.3, “Connecting the Power Cord.”

Turning the Power ON/OFF

POWER switch: The power is turned ON and OFF alternately as the switch is pressed.

3.3 Connecting the Power Cord

CAUTION

Before Making Measurements

Note

• With the DC Power Model, if the main power is ON but the power does not turn on even if you

• With the DC Power Model (with the -DC power supply specification), a shutdown may occur if

Response at Power 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

• Wait at least 10 seconds after turning the power OFF before turning it back ON again.

• If calibration does not start when the power is turned ON, or if the normal waveform display

turn on the power switch, the circuit breaker on the rear panel may be tripped. Reset the circuit breaker by following the procedure in section 15.5, "Resetting the Circuit Breaker."

the power supply voltage exceeds 19 VDC or falls below 9.5 VDC. In case of a shutdown, power cycle the unit using the power switch on the front panel (turn the power OFF, wait at least 10 seconds, then turn the power back ON again). If the instrument still fails to start, turn OFF the power switch on the front panel, turn OFF the main power switch on the rear panel, then wait 10 seconds or more and turn the power back ON again.

screen does not appear, check the following points.

• Check that the power cord is plugged in properly.

• Check that the main power switch is turned ON.

• Check that the correct voltage is being supplied from the AC outlet. (See section 3.3) If there is still no power even after the above points have been checked, contact your nearest YOKOGAWA representative as listed on the back cover of this manual.

IM 701610-01E

3-7

3.3 Connecting the Power Cord

For Accurate Measurement

Turn the power switches ON and allow the unit to warm up for at least 30 minutes. After warm-up is complete, perform calibration. (See section 4.7)

Response at Power OFF

When you press the power switch to turn OFF the power, the power to the unit turns off only when access to the storage media is done. If you turn OFF the power when a Zip disk is inserted in the drive, the disk is ejected. Settings made prior to turning OFF the power are retained (even if the power cord is removed). This allows display of waveforms using those saved settings the next time the power is turned ON.

Note

The settings are backed up by a lithium battery. The battery lasts for approximately 5 years if it is used at an ambient temperature of 23°C. When the battery voltage drops below the specified level, a message will appear on the screen. In this case, the battery needs to be replaced immediately. The battery cannot be replaced by the user, so contact the nearest YOKOGAWA representative listed on the back cover of this manual.

3-8

IM 701610-01E

3.4 Connecting a Probe

Input Terminals

A probe (or an input cable such as a BNC cable) must be connected to one of the input terminals* (CH1 to CH4 (or CH1 and CH2 for the DL1620)) located on the lower section of the front panel. The input impedance is 1 MΩ ±1.0% and approximately 28 pF.

* The number of input terminals varies according to the instrument model.

To prevent fire or electric shock, do not use this instrument for category II, III, or IV measurements.

The maximum allowable input voltage is 300 VDC or 300 Vrms when the frequency is 1 kHz or less. Never input a voltage exceeding this level, as it could damage the input section of the instrument. If the frequency exceeds 1 kHz, the input section may be damaged even when the voltage is below 300 VDC.

Before Making Measurements

WARNING

CAUTION

DL1640/DL1640L

1 MΩ 28 pF 300 V

DL1620

1MΩ 28pF 300V

CAT

Points to Note when Connecting a Probe

• When connecting a probe to the instrument for the first time, perform phase correction of the probe as described in the section 3.5. Failure to do so may result in unstable gain across different frequencies, thereby preventing correct measurement. Calibration must be performed for each channel.

• If the object to be measured is connected to the instrument directly, without using a probe, correct measurement cannot be performed due to the load effect.

CAT

IM 701610-01E

3-9

3.4 Connecting a Probe

Probe

Specifications for the probe (700960) supplied with the instrument (after calibration)

Item Specifications Setting 1 : 1 Conditions

Input impedance/ 10 MΩ ±2%,approx. 14 pF 1 MΩ ±1.0%, approx. 150 pF When used with capacitance this instrument

Attenuation ratio 10 : 1 ±3% — When used with

Frequency band DC to 200 MHz DC to 6 MHz When used with

Rise time 1.8 ns or less 58 ns or less When used with

Maximum 600 V (DC + AC peak) input voltage or 424 Vrms,

Connector type BNC BNC — Total length 1.5 m 1.5 m —

*1 When the probe’s attenuation is “1 : 1,” never input voltage exceeding the maximum input

voltage of this instrument.

Setting 10 : 1

Frequency is 100 kHz or lower

this instrument

—

When Using a Probe other than the One Supplied with the Instrument

• To measure a signal which contains harmonics of approximately 200 MHz, use a probe with a frequency band of 200 MHz or higher.

• Correct measured values cannot be displayed if the probe’s attenuation ratio is not “1 : 1,” “10 : 1,” “100 : 1” or “1000 : 1.”

Setting the Probe Attenuation

Follow the operating procedure given in section 5.4, “Selecting Probe Attenuation” so that the probe’s aVh9Óuation matches the one displayed below Probe in the soft key menu. If they do not match, measured values cannot be read correctly.

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

When using YOKOGAWA current probe or differential probe use the power supply for the probe provided on the rear panel of the instrument.

* Current probes made by YOKOGAWA: 700937, 701930, 701931, 701932, and 701933 ** Differential probes made by YOKOGAWA: 700924, 700925, 701921, 701922

CAUTION

Use the power connectors for the probes on the rear panel only for the current probes or the differential probes. Using the power connectors for any other purpose can damage the DL1620/DL1640/DL1640L or the device that is connected.

Precautions to be Taken when Using the Current Probe or the Differential Probe

When connecting the current probe or the differential probe to the probe power supply terminal on the rear panel, make sure that the current does not exceed the range shown below. Otherwise, the DL1620/DL1640/DL1640L operation may become unstable due to the activation of the excessive current protection circuit.

3-10

DL1640/DL1640L

PROBE POWER (OP)

(12 V)

Total current consumption≤450 mA

DL1620

PROBE POWER(OP)

(12V)

Total current consumption≤450 mA

IM 701610-01E

3.4 Connecting a Probe

When using the current probe, the number of probes that can be used is limited by the current generated by the device under measurement. Examples of current consumption measurement using an active probe that can be connected to the DL1620/DL1640/ DL1640L are shown below.

Current Probe (700937)

250 200 150 100

-50

-100

-150

-200

-250

Current Consumption [mA]

-15 -10 -5 0 5 10 15

Current Generated [A]

Current Probe (701931)

500 400 300 200

100

-100

-200

-300

-400

Current Consumption [mA]

-500

-500 -400 -300 0 100 200 500

-200 -100 300 400

Current Generated [A]

AC (f=50Hz)

Positive Current

Negative Current

Current Probe (701930)

400

300

200

100

-100

-200

-300

Current Consumption [mA]

-400

-150 -100 -50 0 50 100 150

AC (f=50Hz)

Positive Current

Negative Current

Current Generated [A]

AC (f=50Hz) AC (f=50Hz)

Positive Current

Negative Current

Current Probe (701932)

400

300

200

100

-100

-200

-300

Current Consumption [mA]

-400

-30 -20 -10 0 10 20 30

Positive Current

Negative Current

Current Generated [A]

Before Making Measurements

Current Probe (701933)

400

300

200

100

-100

-200

-300

-400

Current Consumption [mA]

-30 -20 -10 0 10 20 30

Current Generated [A]

For details on the usage conditions of each probe, see "Relationship between the current being measured and probe's current consumption" on the following Web page.

http://www.yokogawa.com/tm/probe/

Calculate the positive and negative current consumption of the differential probe at a maximum of 125 mA.

AC (f=50 Hz)

Positive Current

Negative Current

IM 701610-01E

3-11

3.5 Compensating the Probe (Phase Correction)

CAUTION

Never apply an external voltage to the COMP terminal, as damage to the instrument may result.

Operating Procedure

1. Turn ON the power switch.

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

3. Touch the probe’s tip against the probe compensation signal output terminal and

connect the grounding wire to the functional earth terminal.

4. Perform auto setup using the procedure described in section 4.3.

5. Insert a screwdriver into the phase adjusting hole in the probe and turn the trimmer

so that the displayed waveform becomes square.

Phase Adjusting Hole

Probe Compensation (COMP) Signal Output Terminal

Functional Earth Terminal

3-12

IM 701610-01E

Explanation

Correct Waveform Over-Compensated

(Gain is too High at High Frequency)

Under-Compensated (Gain is too Low at High Frequency)

3.5 Compensating the Probe (Phase Correction)

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.

Calibration Signal

A probe compensation signal (square waveform) of the following characteristics is output from the CAL terminal on the front panel. Frequency: approx. 1 kHz Amplitude: approx. 1 V

Waveform Differences

Before Making Measurements

IM 701610-01E

3-13

3.6 Setting the Date and Time

Relevant Keys

Operating Procedure

Displaying the System Configuration Menu

1. Press MISC.

2. Press the System Cnfg soft key to display the system configuration menu.

3. Press the Date/Time soft key to display the date and time display/setting menu.

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

3-14

Turning ON/OFF the Date and Time Display

4. Select ON or OFF by pressing SELECT.

Not displayed if the Ethernet interface option is not installed.

Settings for these items can be input directly using a USB keyboard. ( )

Proceed to step 5 to manually set the date and time, and to step 12 to obtain the time from the SMTP server.

Setting the date and time manually

5. Turn the jog shuttle to move the cursor to Type

6. Select Manual by pressing SELECT.

7. Turn the jog shuttle to move the cursor to Year.

8. Press SELECT to display the Year input box.

9. Set the year using the jog shuttle.

10. In a similar fashion, set the Month, Day, Hour, Minute, and Second.

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

settings.

IM 701610-01E

Explanation

3.6 Setting the Date and Time

Setting the Date and Time Using the SNTP Server (Optional, Version 1.13 or later)

To obtain the time from the SNTP server, you must first connect to the network, and then to the SNTP server. For details, see section 13.2, "Configuring the Ethernet Interface (TCP/IP)," and section 13.11, "Setting the Time Difference from the GMT (Greenwich Mean Time)/Setting SNTP."

12. Proceed to step 4, then turn the jog shuttle to move the cursor to Type.

13. Press SELECT to select SNTP.

14. Turn the jog shuttle to move the cursor to Time Difference from the GMT and Time Hour.

15. Press SELECT to display the hour input box.

16. Use the jog shuttle to set the time difference from GMT (Greenwich mean time).

17. Set the minutes in the same manner.

18. Turn the jog shuttle to move the cursor to Set.

19. Press SELECT to obtain the time from the SNTP server. The time and date calculated from the entered GMT time difference is set.

Date (YY / MM / DD)

The last two digits of the year are used to set the year (YY).

Before Making Measurements

Time (HH : MM : SS)

The 24-hour clock is used.

Setting the Time Using the SNTP Server

You can use the SNTP server time to set the date and time on the instrument. This function is available on models with the Ethernet interface installed. For information on SNTP and GMS, see section 13.11, "Setting the Time Difference from the GMT (Greenwich Mean Time)/Setting SNTP." The difference from GMT set here is linked to the setting in section 13.11, "Setting the Time Difference from the GMT (Greenwich Mean Time)/ Setting SNTP."

Note

• The date and time are backed up by the built-in lithium battery.

• Leap years are taken into account.

IM 701610-01E

3-15

Chapter 4 Common Operations

4.1 Entering Values and Character Strings

Entering a Value

Direct Entry Using the Special Knob

The following knobs can be used to directly enter values simply by turning them. V/DIV and TIME/DIV knobs

VERTICAL

PRESET

V DIV TIME DIV

HORIZONTAL

ZOOM

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTIO N DELAY

MODE POSITION

Entry Using the Jog Shuttle

Before using the jog shuttle to enter a value, you must select the desired parameter by pressing the corresponding soft key. The jog shuttle ring (the outer ring of the jog shuttle) allows you to enter values in larger steps than the jog shuttle dial. The size of the step depends on the angle by which the shuttle ring is turned. For some parameters you can use the arrow keys below the jog shuttle to shift from one digit to the next.

Common Operations

IM 701610-01E

Parameter for Setting with the Jog Shuttle

Note

If you make an incorrect change with the jog shuttle, you can undo the change by pressing

RESET.

4-1

4.1 Entering Values and Character Strings

Entering a Character String

The date/time, file name, and comment can be entered using the keyboard displayed on the screen. Operate the keyboard using the jog shuttle, the SELECT key and arrow key to enter a character string as follows.

Keyboard Operation

1. Turn the jog shuttle and move the cursor to the character you wish to enter. The and soft keys can be used to move the cursor up and down.

2. Press SELECT to confirm the character entry. If a character string is already entered, use the arrow keys to move the cursor to the position at which you wish to enter the character.

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

4. ENT on the keyboard and press SELECT. The character string is confirmed and the keyboard disappears. The ENT soft key can be used to confirm the string (and hide the keyboard). At this point, the confirmed string is temporarily stored.) If RESET is pressed before confirming the character string, the entire string is cleared.

CAPS: an uppercase letter

4-2

CAPS: a lowercase letter

Confirms the displayed characters. Recall the temporary stored character string.

See “Recall” below. Switches between insert and overwrite modes. Deletes the character before the cursor. Toggles uppercase and lowercase character.

Moves down the cursor. Moves up the cursor.

• Operation to Temporarily Store Character Strings

The strings that are previously confirmed are sequentially sent to the subsequent memories. When the number of confirmed strings exceeds eight, the strings are deleted in order starting from the oldest string. The

- 7 symbols are not

displayed on the screen.

Symbol indicating the memory storing the string

When string “AA” is Stores AA confirmed first

When string “BB” is Stores BB Moves and confirmed next stores AA

When string “CC” is Stores CC Moves and Moves and confirmed next stores BB stores AA

.................................................................................

When string “HH” is Stores HH Moves and Moves and ...... Moves and

confirmed next stores GG stores FF stores AA

When string “JJ” is Stores JJ Moves and Moves and ...... Moves and Deletes AA

confirmed next stores HH stores GG stores BB

...............

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4.1 Entering Values and Character Strings

• Recall (Note that the 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. When you press the

soft key repeatedly, the eight most recently confirmed and stored strings are displayed one at a time from newest to oldest in the keyboard entry box. If the

soft key is pressed again after the eighth string, the display will

return to the first string.

2. Make appropriate corrections to the recalled string and confirm it according to steps 1 to 4 that were described above in “Entering a Character String,” and “Operation to Temporarily Store Character Strings.” At this point, the confirmed string is temporarily stored.

Keys other than Characters

DEL: Deletes the character on the cursor. INS: Switches between insert and overwrite modes. The indicator is lit when in

insert mode. SPACE: Enters a space. ENT: Confirms the displayed characters. CAPS: Toggles uppercase and lowercase characters.

Number of Characters and Types Available

Number of Characters Available Characters

Date, time Specified number 0 to 9 ( / : ) File name 1 to 16 0 to 9, A to Z, %, _, (,), Display image comment 0 to 20 All characters (including space) File comment 0 to 25 All characters (including space) Mail address 0 to 40 All ASCII characters on the keyboard

User name/Login name 0 to 15 All ASCII characters on the keyboard

Password 0 to 15 All ASCII characters on the keyboard

(including space)

Common Operations

Note

• Comments and file names can both contain both uppercase and lowercase letters. However, file names are restrictions. AUX, CON, PRN, NUL, CLOCK, COM1 to COM9, LPT1 to LPT9

• You cannot enter two or more atmarks (@) in succession.

Connecting a USB Keyboard

USB PERIPHERAL Connector

When connecting a USB keyboard to the DL1620/DL1640/DL1640L, connect a USB cable to the USB PERIPHERAL connector. There are two USB PERIPHERAL connectors.

Port 1

Port 2

not

case sensitive. The following file names are not allowed due to MS - DOS

3 4

Pin No. Signal name

1 2 3 4

BUS

D–: D+: GND:

+5 V –Data +Data Ground

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4-3

4.1 Entering Values and Character Strings

Keyboards that can be Used

The keyboards that can be used depend on the language that you selected in section 14.5 (English or Japanese). A 104 USB keyboard (English) or a 109 USB keyboard (Japanese) that conforms to USB Human Interface Devices (HID) Class Ver. 1.1 can be used.

• When the language is English: 104 keyboard

• When the language is Japanese: 109 keyboard The default language is English.

Note

• Connect only the keyboards that are allowed. However, 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 as listed on the back cover of this manual.

Connection Procedure

When connecting a USB keyboard, directly connect the keyboard to the DL1620/ DL1640/DL1640L with a USB cable as shown below. You can connect the USB cable regardless of the power ON/OFF state of the DL1620/DL1640/DL1640L (supports hotplug). Connect the type A connector of the USB cable to the DL1620/DL1640/DL1640L; connect the type B connector to the keyboard. When the power switch is ON, the keyboard is detected and enabled approximately 6 seconds after it is connected.

USB Keyboard

USB Cable

DL1620/ DL1640/ DL1640L

Note

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

• Connect only a USB keyboard, printer, or mouse to the USB PERIPHERAL connectors.

• Do not connect multiple keyboards. Do not connect more than one keyboard, printer, or mouse at one time.

• Even if you continuously depress a key the character will not be input repeatedly.

Entering File Names, Comments, etc.

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

Executing Functions Corresponding to the Keys on the Front Panel of the DL1620/ DL1640/DL1640L

The functions corresponding to the keys on the front panel of the DL1620/DL1640/ DL1640L are assigned to the keys on the USB keyboard. By pressing the keys on the keyboard, you can operate the DL1620/DL1640/DL1640L in a similar fashion. The assignment of functions varies depending on the keyboard type. For details, see Appendix 5.

4-4

IM 701610-01E

4.1 Entering Values and Character Strings

Entering Numerical Values Using a USB Keyboard

Numerical values for menu items preceded by the

or symbol can be input directly

using a USB keyboard.

Press the corresponding soft key, enter the values with the USB keyboard, then press the Enter key. The entered values are displayed in the upper part of the screen.

• Inputting a Units Prefix

If unit prefixes are displayed (such as m for Offset in the example above), you can input the character for the prefix as well as the numerical value using the USB keyboard. Prefixes can be entered for units of voltage (V) and time (s). Also, the prefixes that can be used are determined by the allowable input range.

Input Example

• If you type 1 then Enter for the Offset, this means 1 V so 1000 mV is displayed on the screen.

• If you type 1, 0, then m, this means 10 mV so 10 mV is displayed on the screen. If you enter a prefix for the units, it is not necessary to press the Enter key.

The available unit prefixes are as follows:

Common Operations

Key Prefix

K or k 10 m10 U or u 10 N or n 10 P or p 10

3 –3 –6 –9 –12

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4-5

4.1 Entering Values and Character Strings

Operations Using a USB Mouse

You can use a USB mouse to operate the DL1620/DL1640/DL1640L as you would using the front panel keys. In addition, you can point to the desired item on a menu and click it. This is similar to pressing the 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 left side panel of the DL1620/DL1640/DL1640L. For details on the USB PERIPHERAL connector, see page 4-3.

USB Mouse Models That Can Be Used

A USB mouse (with a wheel) conforming to USB HID Class Ver.1.1. can be used.

Note

• For USB mouse models that have been tested for compatibility, contact your nearest YOKOGAWA dealer as listed on the back cover of this manual.

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

Connection Procedure

When connecting a USB mouse, connect the mouse directly to the USB PERIPHERIAL connector as shown below. You can connect/disconnect the USB mouse regardless of whether the DL1620/DL1640/DL1640L is ON or OFF (supports Hot Plug). When the power is turned ON, the mouse is detected and enabled approximately 6 seconds after it is connected.

Note

• Do not connect USB devices other than a USB keyboard, USB mouse, or USB printer to the USB PERIPHERAL connector.

• There are two USB PERIPHERAL connectors on the DL1620/DL1640/DL1640L. However, do not connect two mouses to both connectors at the same time.

Confirming the Type of USB Mouse that is Connected

The procedure to confirm the type of USB mouse connected to the DL1620/DL1640/ DL1640L is the same as the procedure to confirm the type of USB keyboard. See page 4-4.

4-6

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4.1 Entering Values and Character Strings

USB Mouse Operation

• Operations Similar to the Front Panel Keys on the DL1620/DL1640/DL1640L (Top Menu) Displaying the Top Menu

Right-click the screen. The front panel keys on the DL1620/DL1640/DL1640L are displayed as the top menu.

Selecting Items on the Top Menu

Point to the item that you wish to select and click the item. The setup menu corresponding to the selected item is displayed at the bottom of the screen. The top menu disappears. Pointing to an item with a submenu (items with a “>” mark displayed to the right) displays the submenu. As with the top menu, point to the item that you wish to select and click the item.

Top menu: Right-click to display the top menu.

Pointer Submenu:

Items that have lower layers are displayed as submenus.

Common Operations

The setup menu appears.

Note

• The following keys do not appear on the top menu. ESC, RESET, SELECT, HELP, and arrow keys

• The top menu also displays characters that are indicated in purple on the front panel.

• The TRIGGER submenu contains the following TRIGGER group keys. MODE, SIMPLE/ENHANCED, POSITION, ACTION, and DELAY

• There is no MANUAL TRIGGER key on the front panel.

• To display the COPY menu or the IMAGE SAVE menu, select COPY-MENU or IMAGEMENU. To execute the COPY or IMAGE SAVE operation, select COPY or IMAGE SAVE.

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4-7

4.1 Entering Values and Character Strings

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

Click the item that you wish to select on the setup menu. If another menu appears when you select an item, move the pointer to the new frame displaying the item that you wish to select and click the item. If an item such as ON or OFF appears when you select an item, move the pointer to the new frame containing the item and click the item. This operation switches the item. For menus on which items are selected using the jog shuttle and SELECT, click the desired item. Click again to confirm the new setting and close the selection dialog box. For items through which you can scroll, turn the mouse wheel to scroll.

Click within this frame to show the selection menu. Point to the item that you wish to select and click the item to confirm the selection.

Click within this frame to switch the selected item.

Selection items

Clearing the Menu Screen

Click anywhere outside the menu screen.

• Setting Values

For menu items with a

or icon, numeric values can be entered as follows:

• To select a menu item with a or icon, click the center of the menu item. If

there are two setup items in a single menu item, you can click either item.

• Turn the mouse wheel away from you to increase the value.

• Turn the mouse wheel toward you to decrease the value.

• To move to a different digit, click the left or right of the value. At this point, the

pointer changes to or . If you point to the left and click, the current digit moves to the left; if you point to the right and click, the current digit moves to the right. The current digit moves one digit at a time for each click.

• To reset the value to its default, right-click the desired menu item.

Moving the pointer in this area causes the pointer to change. Click to move the current digit. Right-click to reset the value to its default.

4-8

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4.1 Entering Values and Character Strings

• Selecting Toggle Box Items in the Dialog Box

• Click the item that you wish to select. The item is selected. Click the selected item again to deselect it.

• To close the dialog box, click anywhere outside the dialog box.

Click the item that you wish to select.

Note

To close an error dialog box, click anywhere outside the error dialog box.

• Selecting a File, Directory, or Medium Drive in the File List Window

• Click a file, directory, or medium drive name to select it.

• If a scroll bar appears in the file list window, you can turn the mouse wheel to scroll through the file list.

• To cancel the selection, click anywhere outside the file list window. The selection is cancelled and the file list window closes.

Common Operations

Scroll bar

Click the file, directory, or storage medium drive that you wish to select.

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4-9

4.1 Entering Values and Character Strings

• Setting V/DIV and TIME/DIV Setting V/DIV

When the waveform of a channel measuring voltage is displayed, point near the V/DIV value displayed at the upper-left corner of the screen. The pointer changes to

. Click the V/DIV value for the channel that you want to set. The selected V/DIV value is framed in a box. Turning the mouse wheel away from you increases the V/DIV value; turning it toward you decreases the V/DIV value.

Setting TIME/DIV

Point near the TIME/DIV value displayed at the upper-right corner of the screen. The pointer changes to DIV value; turning it toward you decreases the TIME/DIV value.

Moving the pointer to the position indicated below changes the pointer. Yo u can change the V/DIV or TIME/DIV setting by turning the wheel.

. Turning the mouse wheel away from you increases the TIME/

4-10

IM 701610-01E

4.2 Initializing Settings

Relevant Keys

Operating Procedure

Performing Initialization

1. Press SETUP.

2. Press the Initialize soft key to start initialization.

Canceling Initialization

3. Press the Undo soft key. This will restore the previous settings that were in effect

CLEAR TRACE

HISTORY

MEASURE

CURSOR

MENU MENU

X - Y

DISPLAY

VERTICAL

COPY

PRESET

VDIV TIME DIV

SETUP

POWER

before initialization.

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Common Operations

Note

The Undo operation remains available only while power stays on. The setting parameters that existed immediately before initialization are cleared if you execute auto setup after initialization.

IM 701610-01E

4-11

4.2 Initializing Settings

Explanation

The initialization function allows you to reset parameter values which have been set using panel keys to the default (factory settings). This is very convenient when you have to cancel the previous settings or when you have to restart measurement from the beginning.

Initialization

Initialization means resetting parameters to their factory setting values. For details on factory settings, see the Appendix.

Settings which cannot be Initialized

Date and time Communication or ethernet interface related settings Setting parameters on storing and recalling function Setting the message language (English or Japanese) Internal flash memory

Canceling Initialization

If you have performed initialization by mistake, press the Undo soft key. This will restore the previous settings used before the initialization was performed.

Initializing All Settings

Turning the power switch ON while holding down RESET will start initialization. This also initializes settings relating to the communication or ethernet interface, settings stored to the internal memory using the store/recall function, and so on. If settings are initialized using this method, you will not be able to restore the previous settings.

4-12

IM 701610-01E

4.3 Performing Auto Setup

Relevant Keys

Operating Procedure

Performing Auto Setup

1. Press SETUP.

2. Press the Auto Setup soft key to perform auto setup.

Canceling Auto Setup

3. Press the Undo soft key to restore the settings that existed immediately before

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

MENU MENU

COPY

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

When auto setup is executed, waveform acquisition starts automatically.

auto setup.

Common Operations

Explanation

The key settings such as V/div, T/div, and trigger levels are automatically set to optimum values for the input signal.

Before Auto Setup

After Auto Setup

Center Position

The center position after auto setup is set to 0 V.

Target Channels

Auto setup is performed on all channels.

Loaded Waveforms

When you perform auto setup, the loaded waveforms are unloaded. (Pressing the Undo soft key has no effect.)

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4-13

4.3 Performing Auto Setup

Canceling Auto Setup

By pressing the Undo soft key, the settings can be set back to the values that existed immediately before auto setup was performed. However, settings which existed before auto setup are erased when the power is turned OFF. In this case, the Undo operation will have no effect. The setting parameters that existed immediately before auto setup are cleared if you execute initialization after auto setup.

Waveforms that can be Automatically Setup

Frequency: Approx. 50 Hz or more Maximum Absolute Input Value: Approx. 20 mV or more (assuming 1 : 1 probe

attenuation)

Type: Repetitive waveforms that are not complex

When the input coupling is set to “DC.”

Note

The auto setup function may not operate properly in some cases such as when the waveform contains a large DC offset or high-frequency components.

Settings Made by Auto Setup

Waveform Acquisition and Display

Acquisition Mode Normal Acquisition Count Infinite Record Length 10 k High-resolution Mode OFF Timebase Int Accumulation Mode OFF Zoomed Waveforms Traces set ON for display

Vertical Axis Settings

V/div Set to a value so that the absolute value of the input

waveform is between 1.6 div to 4 div. (approximately) Offset Voltage 0 V (If Adjust Mode is 0 V) Coupling DC Bandwidth FULL Display ON/OFF Turns ON the channels of which the absolute value of the

amplitude is at least 20 mV (1 : 1) Position 0 div

Horizontal Axis Settings

T/div Set so that screen displays 1.6 to 4 periods of the auto

setup waveform with the shortest period.

Trigger Settings

Trigger Mode Auto Trigger Type Simple Trigger Source Channel with the longest period and an amplitude of at least

1 div Trigger Level and Slope Level is 1/2 the trigger source amplitude. Slope is “rising.” Trigger Coupling The center level of the maximum and minimum values/

rising HF Rejection OFF Hysteresis Holdoff Time 80 ns Trigger Position 50% Trigger Delay 0 s

Math Setting

Scalling Auto Automatic setup affects only the settings listed above. All other settings remain unchanged.

4-14

IM 701610-01E

4.4 Storing and Recalling Setting Parameters

Relevant Keys

Operating Procedure

1. Press SETUP.

2. Press the Store Recall soft key.

Recalling

3. After step 2, press the soft key corresponding to the memory number to be

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

MENU MENU

COPY

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

retrieved (Recall #1 through Recall #3) to execute the recall operation.

Common Operations

Storing

3. After step 2, press the soft key corresponding to the memory number to be stored

(Store #1 through Store #3) to execute the store operation. The execution date of the store operation is also displayed.

4. Press the Store Detail soft key to display the details of the store operation. To

enter a comment, follow the procedure described in section 4.1, “Entering a Character String.” There is a lock switch that you can use to prevent (lock) overwriting of the stored data. Turn the jog shuttle to move the cursor to the lock button corresponding to the store number that you wish to lock. Press SELECT to lock the data. Press

SELECT again to release the lock.

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4-15

4.4 Storing and Recalling Setting Parameters

Explanation

Items that are Stored

Stores all information that you entered using the soft key menu or jog shuttle menu, START/STOP, and the ON/OFF conditions of channels.

Selecting the Storage Destination of the Setting Parameters

You can store the setting parameters to three memory locations, Store #1 through Store #3. If the setting parameters are already stored to the selected number, the previous data is overwritten. However, an error message is displayed if the data is locked.

Selecting the Setting Parameters to be Recalled

Select the setting parameters that are stored in the three memory locations, Recall #1 through Recall #3. You can only select memory locations that have setting parameters stored.

Note

• The stored setting parameters are not cleared even if you initialize the settings on the DL1620/DL1640/DL1640L.

•A waveform stops loading when its setting parameters are recalled.

4-16

IM 701610-01E

4.5 Starting/Stopping Waveform Acquisition

Relevant Keys

Operating Procedure

1. Pressing START/STOP starts or stops the waveform acquisition.

Explanation

START/STOP is pressed when starting or stopping waveform acquisition.

• When the indicator to the upper right of START/STOP is ON, waveform acquisition is

• When the indicator to the upper right of START/STOP is OFF, waveform acquisition is

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

MENU MENU

COPY

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Waveform acquisition is in progress when the indicator above the key is lit.

started.

stopped. Stopped is displayed on the upper left corner of the screen.

Common Operations

Operation when the Acquisition Mode is Set to Averaging Mode

• When the waveform acquisition is stopped, the averaging process also stops.

• When the waveform acquisition is restarted, a new averaging process starts.

START/STOP Operation while Accumulation is in Progress

When the waveform acquisition is stopped, accumulation is interrupted. When the waveform acquisition is restarted, a new accumulation starts.

Conditions in which the START/STOP is Disabled

• When the instrument is in the remote mode, controlled via communication.

• When the instrument is printing or auto setup is in progress.

Note

• Pressing FILE or HISTORY while the waveform acquisition is in progress stops the waveform

acquisition.

• If the waveform acquisition conditions are changed and the acquisition is restarted, previously acquired data are cleared.

• The snapshot function can also be used to retain the waveforms that are currently displayed on the screen. The display can be updated without having to stop the waveform acquisition (see next section).

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4-17

4.6 The Snapshot and Clear Trace Functions

Relevant Keys

Operating Procedure

Snapshot Press SNAP SHOT. The snapshot process will start.

Clear Trace Press CLEAR TRACE. The clear trace process will start.

Explanation

Snapshot

This function retains the waveforms currently displayed on the screen. To activate this function, just press SNAP SHOT without stopping acquisition. The currently displayed waveform will be retained. Hence it is very useful when you want to compare waveforms. The following operations are not available for snapshot waveforms.

• Cursor measurements and automatic measurements

• Zoom and math operations The snapshot waveforms can be saved or loaded. For details, see section 11.8, “Saving/Loading Snapshot Waveforms.”

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

4-18

Clear Trace

This function clears every waveform currently displayed on the screen. If the trace is cleared while waveform acquisition is in progress, it is restarted from the first trace. The instrument is performing GO/NO-GO determination, action-on-trigger, or waveform search.

The SNAP SHOT and CLEAR TRACE are not Operative in the Following Cases.

• The instrument is in remote state, controlled via the communication interface.

• The instrument is performing an operation, for example, it is in the process of printing out or performing auto setup, determining GO/NO-GO, performing an action on trigger, or searching data.

IM 701610-01E

4.7 Calibration

Relevant Keys

Operating Procedure

Performing Calibration

1. Press MISC. The MISC menu will appear.

2. Press the Calibration soft key.

3. Press the Auto Cal soft key to select either ON or OFF.

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

MENU MENU

COPY

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Common Operations

4. Press the Deskew soft key to select either ON or OFF.

5. If ON is selected in step 4, select the desired channel.

Pressing the Target CH soft key displays a menu used to select the channel.

6. Press the soft key corresponding to the desired channel to select the channel.

7. Turn the jog shuttle to set the Deskew Time.

8. Press the Cal Exec soft key to start calibration.

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4-19

4.7 Calibration

Explanation

Calibration

The following parameters can be calibrated. Perform calibration when highly accurate measurements are required.

• Ground level offset

• A/D converter gain

• Trigger threshold

• Time axis for repetitive sampling mode

Points for Attention

• Always allow the instrument to warm up for at least 30 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°C and 40°C (preferably at 23°C ±5°C).

• When performing calibration, remove the input signals. Otherwise, proper calibration may not result.

Note

• The above calibration is performed automatically when power is turned ON.

• If the V/div knob has been turned, perform calibration for all parameters except the time axis

for repetitive sampling mode.

Auto Calibration (Auto Cal)

Calibration is performed automatically after the times shown below elapse after turning ON the power, when the T/div setting is changed, or when waveform acquisition is started.

• After 3 minutes

• After 10 minutes

• After 30 minutes

• After one hour and every hour thereafter

If the DL1620/DL1640/DL1640L is auto-calibrated while input takes place, it is recommended that you disconnect the input and then repeat calibration.

Deskew

Corrects the CH1 to CH4 (or CH1 and CH2 for the DL1620) delays.

Deskew Time Setting Range

The correction time is set within the following range. –100 ns to 100 ns

4-20

IM 701610-01E

4.8 Using the Help Function

Relevant Keys

Operating Procedure

Displaying a Help Window

1. Press HELP.

2. Press the function key or soft key for which you want help.

Clearing the Help Window

3. Press HELP again to close the window.

Explanation

Displaying a Help Window

Pressing HELP displays the soft key menu which was in effect before HELP was pressed, or displays a help window which contains information related to jog shuttle menu settings. If a key is pressed or the jog shuttle is turned while a help window is displayed, the help window relating to the displayed soft key menu or the jog shuttle menu will appear.

HISTORY

MEASURE

SETUP

POWER

CLEAR TRACE

CURSOR

DISPLAY

X - Y

VERTICAL

MISCFILE

IMAGE SAVE

GO/NO-GO

HORIZONTAL

MENU MENU

COPY

PRESET

VDIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQSTAR T/STOP

TRIGGER

TRIG D

ENHANCED

SIMPLE

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Common Operations

IM 701610-01E

Clearing the Help Window Pressing HELP again while a help window is displayed will clear the help window.

4-21

Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON/OFF

Relevant Keys

CLEAR TRACE

HISTORY

Operating Procedure

1. Press one of CH1 to CH4 (or CH1 to CH2 for the DL1620) to select the desired

2. Press the Display soft key to select ON or OFF.

MEASURE

CURSOR

X - Y

SETUP

DISPLAY

VERTICAL

POWER

channel.

CH1 to CH4 (or CH1 to CH2 for the DL1620) can be pressed twice to turn the channels ON or OFF.

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

V DIV TIME DIV

ZOOM

MATH

PHASE

SHIFT

ACQ START/STOP

SIMPLE

ACTION DELAY

MODE POSITION

TRIGGER

TRIG D

ENHANCED

ESC

SNAP SHOT

SELECTRESET

HELP

The DL1620 is not equipped with channels 3 and 4.

Vertical and Horizontal Axes

Explanation

IM 701610-01E

The channels CH1 to CH4 (or CH1 to CH2 for the DL1620) can be displayed simultaneously. When turned ON, the indicators to the left of the channel keys light.

Note

• The screen can be split into 1, 2, or 4 display areas (or 1 to 2 display areas). (See section

8.1) A scaling value and waveform label name for each display area (see sections 8.4, 8.5) can also be displayed.

• If a waveform or waveforms are loaded from history memory, floppy disk, Zip disk, or PC card the input waveform cannot be displayed. To compare waveforms, use the snapshot function.

5-1

5.2 Setting the Vertical Position of a Waveform

Relevant Keys

HISTORY

MEASURE

SETUP

CURSOR

CLEAR TRACE

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

VDIV TIME DIV

ZOOM

MATH

SHIFT

PHASE

ACQ START/STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Operating Procedure

1. Press one of the keys from CH1 to CH4 (or CH1 to CH2 for the DL1620) to select

2. Press the Position soft key to set the jog shuttle action to Position.

3. Turn the jog shuttle to set the vertical position.

POWER

The DL1620 is not equipped with channels 3 and 4.

the desired channel.

You can change the setting a digit using the arrow keys (located below the jog shuttle).

5-2

IM 701610-01E

Explanation

5.2 Setting the Vertical Position of a Waveform

Range of Movement

The vertical position can be moved in the range between ±4 div from the center position in the waveform display frame.

Setting Resolution

0.01 div

Confirming the Vertical Position

For input waveforms and computed waveforms, the ground level and vertical position are marked on the left of the waveform display frame.

500 mV/div, Offset: –1 V, Offset Cancel: OFF, Position: 0 div

Ground Level Mark

Vertical Position Mark

Note

• The data which go out of the waveform display frame from moving the vertical position are handled as overflow data.

• If the display waveform goes out of the waveform display frame from moving the vertical position during the waveform acquisition is starting, a chopped waveform is displayed as shown in the following figure even if the vertical position is returned to its original position after stopping the acquisition.

• If the vertical position is moved, the effective data range also changes. For details, see section 1.2.

Vertical and Horizontal Axes

IM 701610-01E

5-3

5.3 Selecting Input Coupling

Relevant Keys

CLEAR TRACE

HISTORY

MEASURE

SETUP

CURSOR

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

VDIV TIME DIV

ZOOM

MATH

SHIFT

PHASE

ACQ START/STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

SNAP

HELP

SHOT

ESC

SELECTRESET

Operating Procedure

1. Press one of the keys from CH1 to CH4 (or CH1 to CH2 for the DL1620) to select

2. Press the Coupling soft key to display the menu used to select the coupling.

3. Press the soft key corresponding to the desired coupling.

POWER

the channel.

The DL1620 is not equipped with channels 3 and 4.

5-4

IM 701610-01E

Explanation

5.3 Selecting Input Coupling

Input Coupling

The following three types of input coupling are available. AC: Acquires and displays only the AC content of the input signal. DC: Acquires and displays both the DC and the AC content of the input signal (1

MΩ).

GND: Checks the ground level.

Input Coupling and Frequency Characteristic

The frequency characteristic when AC or DC is selected is shown below. Note that low-frequency signals and low-frequency contents are not acquired if AC is selected.

When “AC” is selected When “DC” is selected

Attenuation

Vertical and Horizontal Axes

0 dB

–3 dB

200 MHz

Less than 10 Hz when using 1 : 1 probe Less than 1 Hz when using 10 : 1 probe

Input Frequency

0 dB

–3 dB

CAUTION

The maximum input voltage when the frequency is less than or equal to 1 kHz is 300 VDC or 300 V RMS. Applying a voltage that exceeds these values can damage the input section. When the frequency exceeds 1 kHz, voltages below these values can also sometimes damage the input section.

200 MHz

Input Frequency

IM 701610-01E

5-5

5.4 Selecting Probe Attenuation

Relevant Keys

CLEAR TRACE

HISTORY

MEASURE

SETUP

CURSOR

X - Y

DISPLAY

VERTICAL

MISCFILE

GO/NO-GO

MENU MENU

COPY

IMAGE SAVE

HORIZONTAL

PRESET

VDIV TIME DIV

ZOOM

MATH

SHIFT

PHASE

ACQ START/STOP

TRIGGER

TRIG D

SIMPLE

ENHANCED

ACTION DELAY

MODE POSITION

ESC

SNAP SHOT

SELECTRESET

HELP

Operating Procedure

1. Press one of the keys from CH1 to CH4 (or CH1 to CH2 for the DL1620) to select

2. Press the Probe soft key to display the menu used to select the attenuation.

3. Press the soft key corresponding to the desired attenuation.

Explanation

You can select the attenuation or the current-to-voltage conversion ratio of the probe of each channel according to the probe being used from the following. Probe attenuation: 1:1, 10:1, 100:1, 1000:1 Probe current-to-voltage conversion ratio: 10A:1 V(0.1 V/A)*, 100A:1 V(0.01 V/A)*

* The output voltage of the supported current probe is indicated inside the parentheses.

POWER

the desired channel.

The DL1620 is not equipped with channels 3 and 4.

5-6

Note

If the attenuation or the current-to-voltage conversion ratio is not set correctly, the voltage and scale values of the input signals will not be displayed correctly. For example, if you set the attenuation to 1:1 when you are actually using a 10:1 probe, the displayed value for the waveform amplitude will be 1/10th the actual value.

IM 701610-01E

YOKOGAWA DL1620, DL1640, DL1640L User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Checking the Contents of the Package

Safety Precautions

Structure of the Manual

Functions Described in This Manual and the DL1620/ DL1640/DL1640L Version

Contents

Chapter 1 Functions

1.1 Block Diagram

1.2 Setting the Vertical and Horizontal Axes

1.3 Setting a Trigger

1.4 Setting the Acquisition and Display Conditions

1.5 Analyzing the Waveform

1.6 Communications

1.7 Other Useful Functions

Chapter 2 Name and Use of Each Part

2.1 Front Panel/Rear Panel

2.2 Operation Keys/Jog Shuttle/Knobs

2.3 Screens

Chapter 3 Before Making Measurements

3.1 Precautions During Use

3.2 Installation

3.3 Connecting the Power Cord

3.4 Connecting a Probe

3.5 Compensating the Probe (Phase Correction)

3.6 Setting the Date and Time

Chapter 4 Common Operations

4.1 Entering Values and Character Strings

4.2 Initializing Settings

4.3 Performing Auto Setup

4.4 Storing and Recalling Setting Parameters

4.5 Starting/Stopping Waveform Acquisition

4.6 The Snapshot and Clear Trace Functions

4.7 Calibration

4.8 Using the Help Function

Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON/OFF

5.2 Setting the Vertical Position of a Waveform

5.3 Selecting Input Coupling

5.4 Selecting Probe Attenuation