YOKOGAWA DL716 User Manual

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Page 1

Digital Scope

I-1102

IM 701830-01E

1st Edition

Page 2

Foreword

Notes

Thank you for purchasing the YOKOGAWA DL716 Digital Scope. 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. 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. Three manuals are provided with the instrument, including this User’s Manual.

Manual Name Manual No. Description

DL716 User’s Manual IM 701830-01E Describes all functions (except for the communications

function) and their operation procedures for the instrument.

DL716 Communication IM 701830-11E Describes the communications function for the GP-IB/ Interface User’s Manual RS-232 interface.

DL716 Operation Guide IM 701830-02E Describes basic operations only.

• 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 listed on the back cover of this manual.

Trademarks

Revisions

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

• MS-DOS is a registered trademark of Microsoft Corporation.

• HP-GL is a registered trademark of Hewlett-Packard Company.

• PostScript is a registered trademark of Adobe Systems Incorporated.

• ThinkJet is a registered trademark of Hewlett-Packard Company.

• All other company and product names used in this manual are trademarks or registered trademarks of their respective companies.

1st Edition: January 1999

IM 701830-01E

Page 3

Checking the Contents of the Package

MODEL

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.

DL716 Main Body

Check that the model name and suffix code given on the name plate of the rear panel match those on your order. Whenever you contact the dealer from which you purchased the instrument, tell him your unit’s serial No.

MODEL SUFFIX

NO.

Made in Japan

Model Suffix Code Specifications

701830 The input module is not included with the instrument.

Refer to page 3 for information on the input module.

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

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

-F VDE standard power cord (A1009WD) Maximum rated voltage: 250 V, maximum rated current: 10 A

-Q BS standard power cord (A1054WD) Maximum rated voltage: 250 V, maximum rated current: 10 A

-R SAA standard power cord (A1024WD) Maximum rated voltage: 240 V, maximum rated current: 10 A

Help language -HJ English and Japanese

-HG English and German

-HF English and French

-HL English and Italian

Options /M1 Memory extension to 2MW/CH

/M2 Memory extension to 8MW/CH /M3 Memory extension to 16MW/CH /C8 Internal hard disk /G2 User define math function /N1 32-bits extended logic input

*1 Choose one from /M1, /M2, and /M3. Example : Memory extension to 2 MW/CH + internal hard disk + user defined math function + 32-bit extended logic input → 701830-1-M/M1/C8/G2/N1

*1 *1

NO. (Instrument No.)

When contacting the dealer from which you purchased your instrument, please quote the instrument No.

IM 701830-01E

Page 4

Standard Accessories

MODEL SUFFIX

NO.

Power cord (one of the following power cords

is supplied according to the instrument's suffix codes)

Checking the Contents of the Package

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

UL/CSA standard A1006WD

Cover plates(x8) B9946GX

Input modules

VDE standard A1009WD

F Q R

BS standard A1054WD

SAA standard A1024WD

Soft case B9946EB

User's manual

Front panel protection

(Opaque)

cover* B9946GA

Printer roll

chart* B9850NX

Rubber feet (x4) A9088ZM

Communication interface Operation guide

*1 Transparent front cover (700913), sold separately, is also available.

Check that the MODEL indicated on the input module is what you ordered.

Model Name (Abbreviation)

701855 High-Speed Isolation Module (HS_ISOL) 701856 High-Speed Module (HS) 701852 High-Resolution, High-Voltage, Isolation Module (HR_HV) 701853 High-Resolution, Isolation Module (HR) 701860 Temperature Module (TEMP) 701870 Logic Input Module*1 (LOGIC) 701880 Strain Module*2 (STRAIN) *1 Use the Logic input module along with the dedicated probe (700986 or 700987) provided. *2 Use the strain module along with the strain gauge bridge or the strain gauge transducer. Recommended

bridge head: 700932 (120 Ω bridge resistance) or 70933 (350 Ω bridge resistance)

Voltage Modules

(x1) (x1) (x1)

IM 701830-01E

MODEL

MODEL SUFFIX

NO.

Made in Japan

701850

HS_ISOL

MODEL SUFFIX

NO.

Made in Japan

Note

The High-Speed Isolation Module (701850) and High-Speed Module (701851) for the DL708/DL708E can also be used. See "Appendix 7" for details.

Page 5

Checking the Contents of the Package

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.

Measurement lead for measuring voltages of 42 V or less

366926

366961

Measurement lead for measuring voltages of 42 V or more

Alligator clip adaptor set ( rated voltage 300 V ) 758922

758917

Probes

Non-isolated 700998

Isolated 700929

High-Speed Logic Probe 700986

Isolation Logic Probe 700987

Bridge head/cable/connector for the strain module

Bridge Head 700932 Bridge resistance 120 Ω Length 5 m

Bridge Head 700933 Bridge resistance 350 Ω Length 5 m

Connector Conversion Cable 700935

Length 1.5 m

(Convert MIL*

366924

Alligator clip adaptor set ( rated voltage 1000 V ) 758929

Connecting lead (alligator clip) B9879PX

to NDIS*2)

Connecting lead (IC clip) B9879KX

NDIS connector* A1002JC

Other accessories

Optional Spare Parts

Conversion Adapter

BNC to Banana (female) 366921

*1 MIL-C-26482 compatible connector *2 A connector recommended by JSNDI (The Japanese Society for Non-destructive Inspection)

Saftey connector to binding post 751512

Banana(male) to BNC 366922

RS-232 9 pin to 25 pin conversion adapter 366971

Front panel Protection cover (Clear)

700913

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.

Part Name Part No. Minimum Q'ty Remarks

Roll chart B9850NX 5 Thermo-sensible paper, Total length: 30 m

Note

It is recommended that the packing box be kept in a safe place. The box can be used when you need to transport the instrument somewhere.

IM 701830-01E

Page 6

Safety Precautions

This instrument is an IEC safety class I instrument (provided with terminal for protective earth). The general safety precautions in next page 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.

Functional earth terminal (This terminal should not be used as a “Protective earth terminal.”)

Alternating current

ON(power)

OFF(power)

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Safety Precautions

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

WARNING

Power Supply

Ensure the source voltage matches the voltage of the power supply before turning ON the power.

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 protective earth terminal. Do not invalidate protection by using an extension cord without protective earth.

Protective Earth

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

Necessity of Protective Earth

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

Defect of Protective Earth and Fuse

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

Do not Operate in an Explosive Atmosphere

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 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 earth 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.

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How to Use this Manual

Structure of the Manual

This User’s Manual consists of 15 chapters, an Appendix and an Index as described below.

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

2 Name and Use of Briefly explains the significance and use of the unit’s controls,

Each Part connectors, and screen displays. Includes page references to help

3 Before Starting Presents safety precautions, and explains how to install, connect

Observation and up, and switch on the unit. Also explains how to connect the Measurement of probes, install the input module, and how to set the date. Waveforms

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

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

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

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

7 Acquisition and Display Explains acquisition parameters (acquisition mode, record length,

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

9 Waveform Analysis Explains cursor-based measurements, automatic measurements,

10 Output of Screen Data Explains how to print or store screen data to Built-in printer, to

11 Saving/Loading the Explains how to save and reload waveform data and settings to

Data/Connecting to floppy disk, internal HDD (Optional), or external SCSI device. the PC Also explains related disk operations, including disk formatting,

12 Rear-Panel Input/Output Explains external-trigger input, external-clock input, trigger

13 Other Operations Explains how to set the display colors, display language, click

14 Troubleshooting, Gives troubleshooting advice; explains screen messages and self-

Maintenance, and test operation. Inspection

15 Specifications Specifications on the main instrument and the input module are

Appendix Explains the relationships between time axis, sampling rate, and

Index Index of contents.

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

you find detailed information quickly.

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

coupling, probe attenuation, and voltage sensitivity.

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

input filter, history), realtime print to the built-in printer, and realtime recording to the internal hard disk (optional), etc.

graticule, use of overlapping (accumulated) waveform display, and other display-related parameters.

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

floppy, to internal HDD (Optional), to an external SCSI device, to a printer with a centronics interface, or to a plotter or other device connected through the GP-IB interface.

file copying, and file deletion.

output, and video output.

sound, and screen saver.

summarized in tables.

record length, the format for ASCII file headers, initial values and details on the user-defined computation.

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How to Use This Manual

Conventions Used in this Manual

Unit

k ................ Denotes “1000”. Example: 100 kS/s

K ............... Denotes “1024”.

Used Characters

Alphanumerics enclosed in double quotation marks usually refer to characters and set values that appear on the screen and panel. The SHIFT + xxx key refers to first pressing the SHIFT key (the indicator above the SHIFT key lights), and then pressing the xxx key to obtain another, specified, function.

Note

The following symbol marks are used to attract the operator’s attention.

Example: 640 KB (storage capacity of a floppy disk)

Affixed to the instrument, indicating that for safety, the operator should refer to the User’s Manual.

WARNING

CAUTION

Note

Symbol Marks Used for Descriptions of Operations

The following symbol marks are used in Chapters 3 to 14 to distinguish certain features in descriptions.

Function

Operating Procedure

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

Describes precautions that should be observed to prevent damage to the instrument.

Provides information that is important for proper operation of the instrument.

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

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.

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Page 10

Foreword ....................................................................................................................................................... 1

Checking the Contents of the Package .......................................................................................... 2

Safety Precautions ...................................................................................................................................... 5

How to Use this Manual ............................................................................................................................ 7

Chapter 1 Functions

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

1.2 Setting the Vertical and Horizontal Axes ........................................................................................ 1-2

1.3 Setting a Trigger ............................................................................................................................... 1-7

1.4 Setting the Acquisition and Display Conditions ............................................................................ 1-12

1.5 Analyzing the Waveform ............................................................................................................... 1-19

1.6 Other Useful Functions .................................................................................................................. 1-23

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 Starting Observation and Measurement of Waveforms

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

3.2 Installing ........................................................................................................................................... 3-2

3.3 Connecting the Power Cord ............................................................................................................. 3-4

3.4 Setting the Date and Time ................................................................................................................ 3-6

3.5 Installing the Input Module .............................................................................................................. 3-7

3.6 Connecting a Probe ........................................................................................................................... 3-9

3.7 Connecting a Input Cable ............................................................................................................... 3-11

3.8 Connecting a Thermocouple .......................................................................................................... 3-12

3.9 Connecting a Logic Probe .............................................................................................................. 3-13

3.10 Compensating the Probe (Phase Correction) ................................................................................. 3-15

3.11 Connecting the Bridge Head .......................................................................................................... 3-16

Chapter 4 Common Operations

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

4.2 Initializing Settings ........................................................................................................................... 4-3

4.3 The Auto Set-up Function ................................................................................................................ 4-4

4.4 Starting and Stopping Acquisition ................................................................................................... 4-6

4.5 The Snapshot and Clear Trace Functions ........................................................................................ 4-8

4.6 Calibration ........................................................................................................................................ 4-9

4.7 Using the Help Function ................................................................................................................. 4-10

4.8 Selecting the Time Base ................................................................................................................. 4-11

Chapter 5 Vertical and Horizontal Axes

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

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

5.3 Setting V/div ..................................................................................................................................... 5-4

IM 701830-01E

App

Index

Page 11

Contents

5.4 Setting the Vertical Position of a Waveform ................................................................................... 5-5

5.5 Selecting Input Coupling .................................................................................................................. 5-6

5.6 Selecting Probe Attenuation ............................................................................................................ 5-7

5.7 Setting the Bandwidth ...................................................................................................................... 5-8

5.8 Zooming in Vertical Direction ....................................................................................................... 5-10

5.9 Setting the Offset Voltage .............................................................................................................. 5-11

5.10 Using the Linear Scaling Function................................................................................................. 5-12

5.11 Inverting a Waveform..................................................................................................................... 5-14

5.12 Setting the ON/OFF of Channels and the V/div with the All Channel Setting Menu .................. 5-15

5.13 Setting the Temperature Measurement .......................................................................................... 5-16

5.14 Setting the Logic Probe .................................................................................................................. 5-18

5.15 Setting the Strain Measurement ..................................................................................................... 5-19

5.16 Using the Linear Scaling Function for the Strain .......................................................................... 5-22

5.17 Displaying the Setup Menu over the Entire Screen (Full Screen Setup) ...................................... 5-25

Chapter 6 Triggering

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

6.2 Selecting a Channel for Setting Trigger Hysteresis and Trigger Level .......................................... 6-2

6.3 Setting Trigger Hysteresis for Channels 1 to 16 .............................................................................. 6-3

6.4 Setting the Trigger Level .................................................................................................................. 6-4

6.5 Setting the Hold off Time ................................................................................................................. 6-5

6.6 Setting the Trigger Position ............................................................................................................. 6-6

6.7 Setting the Trigger Delay ................................................................................................................. 6-8

6.8 Setting the Edge Trigger (SIMPLE) ................................................................................................ 6-9

6.9 Setting the A→B (n) Trigger (ENHANCED) ............................................................................... 6-10

6.10 Setting the A Delay B Trigger (ENHANCED) ............................................................................ 6-12

6.11 Setting the Edge on A Trigger (ENHANCED) ............................................................................ 6-14

6.12 Setting the OR Trigger (ENHANCED) ........................................................................................ 6-16

6.13 Setting the B>Time, B<Time or B Time Out Trigger (ENHANCED) ........................................ 6-17

6.14 Setting the Window Trigger (ENHANCED) ................................................................................. 6-19

6.15 Setting the Timer Trigger ............................................................................................................... 6-21

Chapter 7 Acquisition and Display

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

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

7.3 Sequential Store Mode ..................................................................................................................... 7-4

7.4 Box Average Mode ........................................................................................................................... 7-5

7.5 Using the History Memory ............................................................................................................... 7-6

7.6 Realtime Print to the Built-in Printer ............................................................................................... 7-9

7.7 Realtime Record to the Internal Hard Disk (Optional) ................................................................. 7-11

Chapter 8 Display

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

8.2 Setting the Interpolation Method ..................................................................................................... 8-2

8.3 Changing the Graticule ..................................................................................................................... 8-4

8.4 Accumulated Waveform Display ..................................................................................................... 8-5

8.5 Turning the Extra Window ON/OFF ............................................................................................... 8-7

8.6 Turning Display of the Scaling Value and Trigger Mark ON/OFF ................................................ 8-8

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Contents

8.7 Setting the Waveform Labels ........................................................................................................... 8-9

8.8 X-Y Waveform Display ................................................................................................................. 8-10

8.9 Zooming the Waveform ................................................................................................................. 8-12

8.10 Scrolling the Waveform (Replay) .................................................................................................. 8-15

Chapter 9 Waveform Analysis

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

9.2 Automatic Measurement of Waveform Parameters ........................................................................ 9-4

9.3 Setting Computing Range and Display Units, and Recomputing ................................................... 9-9

9.4 Waveform Addition, Subtraction and Multiplication .................................................................... 9-10

9.5 Binary Computation ....................................................................................................................... 9-11

9.6 Phase Shifted Addition, Subtraction and Multiplication ............................................................... 9-13

9.7 Simultaneous Binary Computation and D/A Conversion of All Channels ................................... 9-15

9.8 Displaying Power Spectrums ......................................................................................................... 9-17

9.9 Manual Scaling ............................................................................................................................... 9-18

9.10 Executing User Defined Computation (Optional) ......................................................................... 9-19

Chapter 10 Output of Screen Data

10.1 Loading Paper Roll in Printer ........................................................................................................ 10-1

10.2 Feeding the Chart............................................................................................................................ 10-3

10.3 Outputting to Printer ....................................................................................................................... 10-4

10.4 Outputting to a Printer with a Centronics Interface....................................................................... 10-6

10.5 GP-IB/RS-232 Interface : Data Output and Format Selection ...................................................... 10-8

10.6 Outputting to Floppy Disk, Internal Hard Disk (Optional) or External SCSI Device................ 10-12

Chapter 11 Saving/Loading the Data/Connecting to the PC

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

11.2 Internal Hard Disk (Optional) ........................................................................................................ 11-2

11.3 Connecting a SCSI Device ............................................................................................................. 11-3

11.4 Formatting Disks ............................................................................................................................ 11-4

11.5 Selecting the Medium and Directory ............................................................................................. 11-7

11.6 Saving/Loading Waveform Data.................................................................................................... 11-8

11.7 Saving/Loading Set-up Data ........................................................................................................ 11-11

11.8 Saving Waveform Data in ASCII, Binary or AG Series Format ................................................ 11-13

11.9 Deleting Files ................................................................................................................................ 11-15

11.10 Copying Files................................................................................................................................ 11-16

11.11 Saving Automatic Measurement Results ..................................................................................... 11-17

11.12 Changing the SCSI IDs ................................................................................................................ 11-18

11.13 Connecting to a PC ....................................................................................................................... 11-19

Chapter 12 External Trigger Input/Output, Video Signal Output

12.1 External Trigger Input (TRIG IN) ................................................................................................. 12-1

12.2 Trigger Output (TRIG OUT).......................................................................................................... 12-2

12.3 Video Signal Output (VIDEO OUT) ............................................................................................. 12-3

Chapter 13 Other Operations

13.1 Setting the Screen Color ................................................................................................................. 13-1

13.2 Setting the Message Language, Click Sound and Brightness of the LCD.................................... 13-3

App

Index

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Page 13

Contents

13.3 Setting the Screen Saver Function ................................................................................................. 13-4

13.4 Setting the Action on Trigger ......................................................................................................... 13-5

13.5 Locking the Keys ............................................................................................................................ 13-7

13.6 ON/OFF the Backlight ................................................................................................................... 13-8

Chapter 14 Troubleshooting, Maintenance and Inspection

14.1 Breakdown Troubleshooting .......................................................................................................... 14-1

14.2 Error Messages and Corrective Actions ........................................................................................ 14-2

14.3 Self-Diagnostic Test (Self Test) ..................................................................................................... 14-5

14.4 Checking the System Condition ..................................................................................................... 14-7

14.5 Warranties on Parts......................................................................................................................... 14-8

Chapter 15 Specifications

15.1 Input Section ...................................................................................................................................15-1

15.2 Trigger Section ............................................................................................................................... 15-1

15.3 Time Axis ....................................................................................................................................... 15-2

15.4 Display ............................................................................................................................................ 15-2

15.5 Functions......................................................................................................................................... 15-2

15.6 External Trigger Input/Output, Video Signal Output .................................................................... 15-4

15.7 GP-IB Interface............................................................................................................................... 15-4

15.8 RS-232 Interface ............................................................................................................................. 15-4

15.9 Centronics Interface........................................................................................................................ 15-4

15.10 SCSI Interface................................................................................................................................. 15-5

15.11 Built-in Printer ................................................................................................................................ 15-5

15.12 Built-in Floppy Disk Drive ............................................................................................................ 15-5

15.13 Internal Hard Disk (Optional) ........................................................................................................ 15-5

15.14 32-bits Extended Logic Input (Optional) ....................................................................................... 15-6

15.15 GO/NOGO Input/Output ................................................................................................................15-6

15.16 General ............................................................................................................................................ 15-7

15.17 External Dimensions ...................................................................................................................... 15-8

15.18 High-speed Isolation Module (701855) ......................................................................................... 15-9

15.19 High-speed Module (701856) ...................................................................................................... 15-10

15.20 High-Resolution, High-Voltage, Isolation Module (701852) ..................................................... 15-11

15.21 High-Resolution, Isolation Module (701853).............................................................................. 15-12

15.22 Temperature Module (701860) .................................................................................................... 15-13

15.23 Logic Input Module (701870) ......................................................................................................15-14

15.24 Strain Module (701880) ............................................................................................................... 15-15

Appendix

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

Appendix 2 Relationship between the Record Length and Acquisition Mode................................... App-3

Appendix 3 How to Calculate the Area of a Waveform...................................................................... App-4

Appendix 4 ASCII Header File Format ............................................................................................... App-5

Appendix 5 List of Defaults ................................................................................................................. App-8

Appendix 6 About User Defined Computations .................................................................................. App-9

Appendix 7 For Input Module 701850 and 701851 .......................................................................... App-14

Index ............................................................................................................................................ Index-1

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Page 14

ATT

FLT

Isolation Block

OFFSET

AMP

OFFSET

AMP

ATT

Isolator

FLT

Isolation Block

ATT

FLT

OFFSET

AMP

FLT

Isolation Block

AMP

RJC

1chip

CPU

ADD

CPU

SCSI

SCSI Port

HDD

GPIB

Port

RS232

Serial Port

Centro

Port

POD-A

POD-B

Bridge Excitation

FLT

Isolation Block

Floating Common

AMP

DIFA

Strain module

Module Block Diagram

Plug-in module CH1 to Ch8

Acquisition Block Diagram

CPU Block Diagram

High-speed Isolation module

High-speed module

High-resolution, High-voltage, Isolation /High-resolution, Isolation module

Anti-aliasing filter

Temperature module

Logic Input module

High-speed Logic Probe

Isolated Logic Probe

Acquisition Data Processing (ADP)

CH1 to CH4

Acquisition Data Processing (ADP)

CH5 to CH8

Optional memory (Max. 16MW/CH)

Acquisition Memory (200kW/CH)

Acquisition Control Logic ASIC (ACL)

Main Memory

Display ASIC

10.4 Color TFT Display

Display RAM

Built-in printer

FDD

Ext clk in

Ext trig in/out

Acquisition Data Processing (ADP) (Logic1, Logic2)

Acquisition Memory Extended Logic Input

Chapter 1 Functions

1.1 Block Diagram

System Configuration

External SCSI device

Screen data

HP-GL compatible plotter

Centronics compatible printer

Functions

Block Diagram

SCSI Interface

External clock input

Trigger out

External trigger input

Object to be

measured

Built-in printer

DL716

Signal input

Data saved to floppy disk

Centronics interface

GP-IB/RS-232 interface

Video output

Waveform data

Waveform data Set-up data Screen data

SCSI Interface

Yokogawa's AG Series

Personal Computer

Waveform data Set-up data Screen data

Printer

Waveform data

IM 701830-01E

Signal flow

The signal flow at the input end varies depending on the module. Here, the high-Speed Isolation Module is taken as an example (refer to the block diagram for the signal flow of each module). First, the signal input from the input terminal is processed at the input section. In the input module (High-Speed Isolation), the input signal is attenuated/amplified by the attenuator (ATT), the adder, and the preamplifier. Then, the signal is isolated through the analog isolator. Bandwidth limiting is done immediately before the A/D converter. In the A/D converter, the input signal is sampled at a sampling rate of 10 MS/s (10 million times in 1 second) and converted to digital data. The digital signals of the sixteen channels in the CPU board go through the primary and secondary processing circuits and are finally displayed on the TFT display. In the primary processing circuit, the ADP(acquisition data processor)/ACL(acquisition control processor) indicated in the block diagram writes the signal to the memory. In the secondary processing circuit, the high-speed microprocessor converts the data for data compression and image

processing.

1-1

Page 15

1.2 Setting the Vertical and Horizontal Axes

Record length

Time Axis ≡ Page 5-2. ≡

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 500 ns/div to 100 ks/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. * 100 ks indicates 100000 seconds (27 hours 46 minutes 40 seconds).

1div=500 µs

10div

1div=1 ms

Note

Display of time axis direction

The number of display points in the time axis direction on a 10-div screen is 1002 points (i.e. 2 points per raster). Processing therefore varies according to record length, as described immediately below. (for more details on the relation between time axis, record length and displayed record length, refer to Appendix 1).

• If record length exceeds number of screen display points (see page 8-2) If the display style is set to “P-P”, the oscilloscope uses P-P compression to generate a 1002-point display (regardless of interpolation setting). If interpolation is “OFF” and the display style is set to “Decim,” the instrument thins the data to generate a 1002-point display. If the display style is set to “All,” then all data points are displayed.

• If record length is less than number of screen display points The instrument interpolates the data to generate the display. (See page 1-16.)

Sampling data

Record length

P-P compression

Voltage axis

0 500

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, refer to Appendix 1.

501 raster

Time axis

1-2

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1.2 Setting the Vertical and Horizontal Axes

1div = 1 V 1div = 500 mV

When V/div is switched from 1 V/div to 500 mV/div

Sample rate

Changing the time axis causes a corresponding change in the sampling rate. Maximum sampling rate is 10MS. 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).

* 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

Time axis setting and roll mode display

If the trigger mode is auto or auto level; T/div is between 100 ms/div and 100 ks/div; and the sample rate is under 200 kS/s, instead of the waveform display being updated (update mode) by the trigger, the waveform is displayed in roll mode. In roll mode, the waveform display flows right to left on the screen erasing the oldest data as new data is acquired. 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.

Limitation during roll mode display

• When the trigger mode is set to normal or time, the waveform is not displayed in roll mode except when “Log Start”/“Single Start” is selected from the ACQ menu.

• The operation when “Single Start”/“Log Start” is selected from the ACQ menu is as follows. By pressing the “Single Start” soft key, the trigger mode (Auto) is set to normal mode. After acquiring the specified record length of data following a trigger activation, the displayed waveform stops. By pressing the “Log Start” soft key, the trigger mode is disabled. After acquiring the specified record length of data, the displayed waveform stops. For the timer trigger, the trigger is activated at the specified time and the data are acquired once.

• The T/div setting during the roll mode display may sometimes be inadequate for observing the changes in the waveform on the main area (see page 1-17). In this case, you can use the zoom area to check the changes in the waveform.

Functions

Vertical Sensitivity (For Voltage Modules) ≡ Page 5-4. ≡

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 is changed by switching the input section with a different attenuator having a different damping factor. The setting changes in steps (1 V/div → 2 V/div → 5 V/ div...).

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. This instrument uses a 12 bit (on High-Speed Isolation/High-Speed Modules) or a 16 bit (on HighResolution, High-Voltage, Isolation/High-Resolution, Isolation Modules) A/D converters and samples the input signal with a resolution of 4000 levels (on High-Speed Isolation/High-Speed Modules) or 64000 levels (on High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Modules). Also, the waveform is displayed in 500 levels (on High-Speed Isolation/High-Speed Modules) or 8000 levels (on High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Modules) per 1 div on the grid.

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1.2 Setting the Vertical and Horizontal Axes

Vertical Position (for Voltage/Logic Input Modules Only) ≡ Page 5-5. ≡

Since a total of eight 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 can be observed more easily. The vertical position 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:2div

Position:0div

Position:-2div

Input coupling (For Voltage Modules) ≡ Page 5-6. ≡

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.

Probe Attenuation (For Voltage Modules) ≡ Page 5-7. ≡

When making voltage measurements, using a probe to connect the circuit being measured and the measurement input terminals has 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. When a probe is used, the probe attenuation must match the instrument’s attenuation setting so that the input voltage can be measured directly. Set to 10:1 or 1:1 when using the accessory voltage probe (700998). Set to 10:1 when using the accessory isolating probe (700929). In addition to 10:1, attenuations of 1:1, 100:1 and 1000:1 are provided. When using a probe or cable besides the ones provided as accessories, set the appropriate attenuation ratio meeting its specification.

Input terminal

Vertical

control

circuit

Vertical control

circuit

Vertical control

circuit

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1.2 Setting the Vertical and Horizontal Axes

Bandwidth Limit (For Voltage, Temperature, and Strain Modules) ≡ Page 5-8. ≡

The bandwidth limit of each module can be set individually. By setting a bandwidth limit, the noise component of the input signal can be deleted during waveform observation.

Zooming in the Vertical Direction ≡ Page 5-10. ≡

Every displayed waveform can be enlarged/reduced by a factor between “x0.1 to x100” in the vertical direction. Zooming is done with the center at the vertical position.

When “V Zoom” is switched from “x1” to “x2”

1div=1V 1div=500mV

Offset Voltage (For Voltage Modules) ≡ Page 5-11. ≡

Since the signal you wish to see can be moved to the vertical position by adding an offset voltage, the observation can be made with a higher voltage sensitivity. Note that the offset value has no affect on cursor measurements, automatic measurements, and mathematical calculations.

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

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

Functions

Inverted Waveform Display ≡ Page 5-14. ≡

The voltage axis is inverted about the vertical position as shown below, and the waveform is displayed.

Original waveform (not inverted)

Vertical position

Inverted waveform

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1.2 Setting the Vertical and Horizontal Axes

Temperature Measurement ≡ Page 5-16. ≡

Types of thermocouples

The types of thermocouples available are as follows. K, E, J, T, L, U, N, R, S, B, W and A (KPvsAu7Fe)

Temperature unit

Can specify °C, °F or K.

Reference Junction Compensation (RJC)

• The voltage generated by a thermocouple depends on the temperature of the spot of measurement and the reference junction temperature. In this case, the function to compensate the temperature on the measurement instrument side to the cold junction is referred to as reference junction compensation.

• This instrument can turn ON/OFF the internal RJC circuit.

ON : Use this setting to enable the reference junction compensation by the internal RJC

circuit.

OFF : Use this setting when checking the temperature measurement value, or when using an

external reference junction (0 °C).

Strain measurement ≡ Page 5-19. ≡

You can measure the strain by connecting a strain gauge bridge (bridge head) or a strain gauge transducer to the strain module.

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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 → Pages 6-1 to 6-9.

Triggers on the edge of a single signal (edge trigger).

Enhanced trigger → Pages 6-1 to 6-8 and 6-10 to 6-20.

This is a complex trigger. The following eight types of enhanced trigger are available. A→B(n) trigger A Delay B trigger Edge on A trigger OR Trigger B>Time trigger B<Time trigger

B Time Out trigger Window trigger

Edge trigger → Page 6-9.

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 CH16 and 32-bits extended logic input), the external trigger input signal and the commercial power supply signal 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.

Functions

Trigger level

Trigger source

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

A → B(n) trigger (Enhanced Trigger) → Page 6-10.

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

When pattern A : CH1 = L, CH2 = L, Enter, When patternB : CH1 = H, CH2 = H, Enter, n = 3

CH1

CH2

Trigger

HL L

CH1

CH2

HHHHLLL

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

Pattern A is true

LH HLL

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1.3 Setting a Trigger

A Delay B trigger (Enhanced Trigger) → Page 6-12.

A trigger is activated the 1st time condition B becomes true after condition A has become true and a preset time has elapsed.

When pattern A : CH1 = L, CH2 = L, Enter, When pattern B : CH1 = H, CH2 =H, Enter, Delay = 2µs

CH1

CH2

Trigger CH1 CH2

HL L

HHHHLLL

Pattern A is true Pattern B is true

2µs

LH HLL

Edge on A (Enhanced Trigger) → Page 6-14.

A trigger is activated when an OR trigger occurs while condition A is true.

When pattern A : CH1 = L, CH2 = L, CH3 = H, CH4 = L, True, Edge OR : CH6

CH1

CH2

CH3

CH4

CH6

Trigger

LH L L L

CH1 CH2 CH3 CH4

CH6

HHHHLLLL

HLL

L HLLH

↑

OR trigger (Enhanced Trigger) → Page 6-16.

A trigger is activated when either of the selected edge triggers occurs. A trigger can be activated by either the rising edge of CH1 or CH2.

1-8

When CH1 = ↑, CH2 = ↑

CH1

CH2

Trigger

TriggerTrigger

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1.3 Setting a Trigger

B>Time, B<Time, B Time out (Enhanced Trigger) → Page 6-17.

A trigger is activated on the falling or rising edge of the pulse when the pulse width exceeds (or drops below) the preset time. In the case of a “Time out” trigger, a trigger is activated when the preset time elapses. If multiple signals are used, a trigger is activated by the AND of the multiple signals.

When B > Time, CH1 = H, Time = 4µs

5µs

CH1

Trigger

When B < Time, CH1 = H, Time = 4µs

5µs

CH1

When B Time Out, CH1 = H, Time = 4µs

4µs

5µs

CH1

1µs

Trigger

1µs

Functions

Trigger

Window Trigger (Enhanced Trigger) → page 6-19.

A certain voltage range (window) is set and a trigger is activated when the trigger source level enters this voltage range (

trigger is activated

Width

Center

) or exits from this voltage range ( ).

Window

trigger is activated

Width

Center

trigger is activated

Window

Timer Trigger (Simple Trigger) → page 6-21.

The trigger is activated at the specified interval from the specified time.

Specified time

Trigger

Specified Interval

Trigger

Specified Interval

Trigger

Specified Interval

Trigger

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1.3 Setting a Trigger

Trigger Mode ≡ Page 6-1. ≡

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

Auto-mode

Displayed waveforms are updated each time a trigger is activated within a specified time (approximately 50 ms, referred to as the time-out period) and are updated automatically after each time-out period.

Auto level mode

If a trigger is activated before the timeout period, it displays the waveform in the same way as in the auto mode. If the trigger is not activated within the timeout period, then the center value of the amplitude of the trigger source is detected, and the trigger level is changed to that value. The trigger is activated using the new value and the displayed waveform is updated.

Half the amplitude

Trigger level Amplitude

Half the amplitude

Normal mode

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

Trigger Hysteresis (For Voltage, Temperature, and Strain Modules) ≡ Page 6-3. ≡

Allow the trigger level to have a width, so that the trigger does not get activated due to small fluctuations in the signal. Select the trigger hysteresis from the following three choices.

• For voltage modules

: Hysteresis of about ± 0.1 div centered on the trigger level. : Hysteresis of about ± 0.5 div centered on the trigger level. : Hysteresis of about ± 1 div centered on the trigger level.

• For temperature module

: Approx. ± (0.5 × the setting resolution of the trigger level) : Approx. ± (1 × the setting resolution of the trigger level) : Approx. ± (2 × the setting resolution of the trigger level)

• For strain modules

: Hysteresis of approx. ± 2.5% of the selected measurement range centered on the trigger

level.

: Hysteresis of approx. ± 12.5% of the selected measurement range centered on the trigger

level.

: Hysteresis of approx. ± 25% of the selected measurement range centered on the trigger

level.

A trigger is activated at this point if

"Rise" ( ) is selected.

Trigger level

Trigger Source and Trigger Level ≡ Page 6-2 and 6-4. ≡

Trigger source : Selects the signal for the selected trigger type. Trigger level : Sets the voltage level used to judge trigger conditions such as trigger slope

(rise/fall of a signal).

1-10

Hysteresis width

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1.3 Setting a Trigger

Trigger Hold-off ≡ Page 6-5. ≡

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

Trigger source signal

Trigger signal restricted by hold-off time "t" (when "Rise" is selected as the trigger slope)

Repetitive period: T

Trigger Position/Trigger Delay ≡ Page 6-6 to 6-8. ≡

Specify which part of the acquired waveform in the acquisition memory to display on the screen by setting the trigger position. Trigger position is equal to the trigger point when the trigger delay is set to 0 s. By using the trigger delay function, the waveform whose acquisition starting point is delayed from the trigger point by the trigger delay time can be displayed.

Functions

When trigger delay is 0s

Trigger position

Trigger point

When the trigger delay is set

Trigger position

Delay time

Trigger point

Changing the T/div setting, the time axis setting is rescaled with respect to the trigger position. The time measurement of cursor measurements and automatic measurement of waveform parameters is based on the trigger position (0 s).

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1.4 Setting the Acquisition and Display Conditions

Record Length ≡ Page 7-1. ≡

Normally, the term record length refers to the number of data points acquired in the acquisition memory per channel. Display record length refers to the number of these data points that are actually displayed on the screen. The sample rate and record length vary according to the time axis setting (refer to page 1-2). This instrument allows the record length to be selected from the following choices: 1 kW, 10 kW, 40 kW, 100 kW, 200 kW, 400 kW, 1 MW, 2 MW, 4 MW, 8 MW, 16 MW, 32 MW, and 64 MW (The maximum record length that can be selected depends on the options). In most cases the displayed record length is identical to the (acquisition) record length. For certain time-axis settings, however, the lengths become different. For details, refer to Appendix

1. To observe all of the data when the display record length is shorter than the set record length, move the horizontal position of the horizontal zoom function. For details, refer to Section 8.9 “Zooming the Waveform.”

Acquisition Modes ≡ page 7-2. ≡

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. The averaged data is then used to generate the display. You can set the attenuation constant to a value from 2 to 256 (in 2

steps), and the

averaging count to a value from 2 to 65536.

Exponential averaging (count = Infinite)

An = {(N - 1)A

: Value obtained after nth averaging

: nth measured value

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

n - 1 + Xn

}

)

Linear averaging (count = 2 to 65536)

Σ X

n=1

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.

Sequentical Store

Refer to page 1-13.

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1.4 Setting the Acquisition and Display Conditions

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 (refer to 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 the maximum sample rate of each module. The time interval used to determine the values is equivalent to the 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 (page 1-3), 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.

Box average

See below.

Sequential Store ≡ Page 7-4. ≡

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 according to the displayed record length. 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).

Functions

Envelope

Display example in case count=100 times Displaying all waveforms

(ALL)

Box average ≡ Page 7-5. ≡

Taking the data sampled at 10 MS/s, the moving averages of certain number of data points are determined as shown in the following figure. These data are acquired in the acquisition memory and displayed. Box averaging is useful for eliminating the small amount of noise on the input signal. It is also effective in removing the noise from a signal acquired only once. Box averaging is only available on High-Speed Isolation/High-Speed Modules.

Input signal (at 500kS/s)

Voltage

Displaying newest waveform (Selected Record No.=0)

• • •

• • • • •

Displaying oldest waveform (Selected Record No.=–99)

• • • • •

Time axis

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Box Averaging data

Voltage

Time axis

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1.4 Setting the Acquisition and Display Conditions

History Memory ≡ Page 7-6. ≡

The instrument automatically retains the last N waveforms recorded. The N value is equal to the maximum sequential-store acquisition count. The instrument retains all waveforms for the first N triggers; then, for each subsequent trigger, the instrument 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 = 100.

Saved waveform data of previous 100 triggers

Selected Record No. 0

Selected Record No. –25

Realtime Recording ≡ Page 7-9 to 7-12. ≡

Realtime print to the built-in printer

The waveform (screen image data) can be printed to the built-in printer continuously like a recorder. Realtime print is possible when the time axis setting is “500 ms to 100 ks/div” and the sample rate is 200 kS/s or less. Even with the same time axis setting, the sample rate varies depending on the record length setting. For details refer to Appendix 1 “Relationship between the Time Axis Setting, Sample Rate and Record Length.” The maximum feeding speed of the printer roll paper (chart speed) is 20 mm/s.

Current waveform display (Selected Record No. = 0)

Any former waveform display (Selected Record No. is selectable in the range –1 to –99)

Realtime record to the internal hard disk (optional)

The data can be recorded in realtime to the internal hard disk (optional). The size of the recording area is 256 Mword, and is allocated on the internal hard disk from the beginning. The realtime recording area is overwritten every realtime recording operation. After a realtime recording session, you can also save the data to another area so that they will not be overwritten. The saved data can be recalled (loaded). The record length and time axis setting that can be used for realtime recording are as follows.

Channels used Time axis setting Possible record length

16 CH (all channels) 5 s/div to 100 ks/div (20 kS/s or less) 1 MW to 16 MW 8 CH (any 8 channels) 2 s/div to 100 ks/div (50 kS/s or less) 1 MW to 32 MW 4 CH (any 4 channels) 1 s/div to 100 ks/div (100 kS/s or less) 1 MW to 64 MW 2 CH (any 2 channels) 500 ms/div to 100 ks/div (200 kS/s or less) 1 MW to 128 MW 1 CH (any 1 channel) 500 ms/div to 100 ks/div (200 kS/s or less) 1 MW to 256 MW

How the hard disk is used

Realtime record

Save/Load as waveform data (File Save)

Drv. Realtime

Real time

record area

256 MW (1.2 GB)

Drv. User Area for saving data (User area)

DIR 1

ROOT

DL_WAVE(waveform data)

DL_SETUP(setup data)

DL_MISC(screen image data etc.)

DIR 2

SCSI

interface

1-14

Input signal

Other than realtime record (normal measurement)

Acquisition

memory

Save/Load the waveform data

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1.4 Setting the Acquisition and Display Conditions

Display settings ≡ Chapter 8. ≡

Display format → page 8-1.

• In order to make the observation of waveforms of multiple channels easy, you can split the screen to display the waveforms. The different ways to split the screen are as follows: Single (no split screen), Dual (2 screens) , Triad (3 screens) , Quad (4 screens), Hexa (6 screens), Octal (8 screens).

• You can select how to assign the waveforms to the split screens from the following choices. Auto : Assign the channels with the display turned ON in order from the top screen. Fixed : Assign the channels in order from the top, regardless of whether or not the channel

User : Arbitrarily assign the channels to the split screens, regardless of whether or not the

Graticule → page 8-4.

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

Extra window → page 8-7.

This feature displays an “extra window” showing the various measurement values (cursor values and automatically measured values). This feature is useful in cases where it is difficult to read the values directly from the waveform.

Scale values and trigger mark → page 8-8.

If the Scale Value setting is ON, the screen displays numerical values at the top and bottom of the vertical axis. If the Trigger Mark is ON, the screen displays a marker indicating the trigger point.

Functions

display is turn ON.

channel display is turn ON.

Waveform labels → page 8-9.

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

Scale values

Waveform label

Trigger mark

Selects use of 3 waveform windows.

“Extra window” shows values of cursor measurement

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1.4 Setting the Acquisition and Display Conditions

Display Interpolation ≡ Page 8-2. ≡

This feature selects the type of interpolation applied in areas where there are less than 500 sample points 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.

Sine interpolation

Generates interpolation data using the function sin(x)/x then interpolates between two dots using resulting sine curve. Sine interpolation is suitable for observation of sine waves.

No interpolation

Displays measurements as discrete dots, without interpolation.

Note

• If interpolation is set OFF, you can use any of the following compression methods to display data in the non-interpolation areas. P-P: Selects use of P-P compression. Decim: Displays data at intervals. All: Displays all values.

• If interpolation is set to Sine or Line, the unit will always use P-P compression for data display in noninterpolation areas.

Accumulated Waveform Display ≡ Page 8-5. ≡

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 following two modes are available.

• Persist : Overlaps the display of waveforms using one color.

• 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.

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1.4 Setting the Acquisition and Display Conditions

X-Y Waveform Display ≡ Page 8-10. ≡

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 X-Y 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 ≡ Page 8-12. ≡

The displayed waveform can be enlarged in the time axis direction. This function is useful when the acquisition time of the waveform is set long and you wish to observe the details of a section of the waveform, or when you wish to change the time axis setting after displaying the waveform with Single Start/Log Start methods (refer to page 4-6). Zooming is not available on areas with less than 11 data points. You set the zoom position according to it's 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

<Main>

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 area

<Main>

Z1 Box

<Z1>

<Z2>

<Z1>

or <Z2>

Z2 Box

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Z1 waveform area

Z2 waveform area

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1.4 Setting the Acquisition and Display Conditions

Moving the display position of the waveform data ≡ Page 8-12 or 8-15. ≡

When the display record length is shorter than the set record length, some of the waveforms are not displayed on the screen. To display the waveforms that are not displayed on the screen, move the display position horizontally with “Main Position” of ZOOM menu or replay function. The maximum record length that can be displayed on the screen is 1 MW.

Main Position

4M 1M

move

1 M Word

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1.5 Analyzing the Waveform

Linear Scaling ≡ Page 5-12. ≡

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 ≡ Page 9-1. ≡

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

•V cursors 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.

•H cursors 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.

• 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.

For markers For V-cursors

Functions

Cursor2

Cursor1

Measurement value of cursor

Cursor1

Cursor2

Measurement value of cursor

• User defined cursors You can assign reference points, the zero point and the end point, on the time axis and measure the relative positions of the two V cursors with respect to the reference. You can arbitrarily set the reference width from the zero point to the end point and the unit of measurement within a certain range.

Cursor1

Cursor Ref1

Reference Width

Cursor2

Cursor Ref2

IM 701830-01E

Unit

Measurement value of cursor

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Page 33

1.5 Analyzing the Waveform

Automated Measurements ≡ Page 9-4. ≡

Automatic measurement of waveform parameters

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 16 parameters for the entire system. There are 26 parameters available for selection.

Statistical processing

You can perform statistical processing on any one of the parameters selected for automatic measurement, based on a specified number of acquisitions.

Waveform Math ≡ Chapter 9. ≡

Simple computation (BASIC mode) → page 9-10.

Adds, subtracts, or multiplies two waveforms (Channels 1 and 2, 1 and 5, 1 and 3, or 3 and 7). Results are displayed as waveform Math1 or Math2. Addition and subtraction are useful for phase comparison, signal-logic checking, and for comparison with the reference signal. Multiplication is useful for checking power signals created by simultaneous input of voltage and current signals.

Addition-

computed waveform

Measurement range

Measurement values

Subtraction-

computed waveform

Multiplication-

computed waveform

Binarization (BASIC mode) → page 9-11.

Converts selected waveform into a binarized waveform. All voltages below the threshold become 0, while voltages above the threshold become 1. This operation is available for Channel 1, Channel 2, and the Math1 waveform.

Phase-shifted computation (PHASE mode) → page 9-13.

Executes a phase shift of either Channel 2, 3, 5, or 7 (with respect to Channel 1), then adds, subtracts, or multiples the result against the Channel 1 waveform.

All-channel binarization and D/A conversion (BINARY mode) → page 9-15.

Binarizes waveforms on all channels: all values below the threshold become 0, Voltages above the threshold become 1. You can choose to generate an analog waveform through exponential summation of the binarized waveforms.

Scaling of Math1 and Math2 waveforms → page 9-18.

The instrument normally auto scales when displaying the computed waveform, but manual scaling can also be selected. If you select auto scaling, the most suitable scaling value for displaying the waveform is determined from the maximum and minimum values of the computed result. If you select manual scaling, then the upper and lower limits of the computed waveform display can be set to any desired values.

Note

Waveform computation cannot be performed on channels that have logic input modules installed.

1-20

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1.5 Analyzing the Waveform

Power Spectrum Display ≡ Page 9-17. ≡

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

The following windows are available: rectangular/Hanning/flattop windows. The rectangular window is effective for transient signals, such as an impulse wave, 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. With the Hanning window, the accuracy is relatively low, but the frequency resolution is relatively high. The frequency resolution of the flattop window is less than that of the Hanning window. However, the flattop window has the advantage of high level accuracy. FFT computation generates 1000, 2000 or 10000 measurement data points, but only half points are displayed on the screen.

Functions

Window Integral Power spectrum

Sine wave

Rectangular

window

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.

Power spectrum = 10 log

R2 + I

( )

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

IM 701830-01E

1-21

Page 35

5 ••••••

721(1)

722(2)

723(3)

724(4)

725(5) ••••••

1441(1)

1442(2)

1443(3)

721

1441

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

Determine the simple average of the data points at the same position across multiple periods and display the waveform.

720

1440

2160

.......

720

1440(720)

1 period

••••••••••••

1.5 Analyzing the Waveform

User Defined Computation ≡ Page 9-19. ≡

You can define a computing equation by combining the following operators. ABS(absolute value), SQR(square root), LOG(logarithm), EXP(exponent), BIN(binary computation), PWHH(pulse width), PWHL(pulse width), PWLH(pulse width), PWLL(pulse width), PWXX(pulse width), ATAN(arctangent), MEAN(moving average), DIF(differentiation), DDIF(2nd order differentiation), INTG(integral), IINTG(double integral), PH(phase), HLBT(Hilbert), P2(square), P3(cube), FILT1(digital filter), FILT2(digital filter), LS-(linear spectrum), RS-(rms value spectrum), PS-(power spectrum), PSD-(power spectrum density), CS-(cross spectrum), TF-(transfer function), CH-(coherence function), PHASE(phase), REAL(real part), IMAG(imaginary part), LOGMAG(logarithm magnitude), MAG(magnitude), SIN(sine), COS(cosine), TAN(tangent), F1(

In addition, you can average or compute the peak value on the computed data. Four operations are available: linear, exponential, cycle, and peak.

Linear averaging

Simply sum the data for the average count (number of acquisitions, 2 to 128, 2 divide by the average count. The resulting waveform is displayed. See page 1-12 for the equation.

Exponential averaging

Determine the average value by attenuating the influence of past data using the specified attenuation constant (2 to 256, 2 the equation.

Cycle averaging

Divide one period of computed data into the specified number of data points (Cycle Count). Do this across multiple periods of data from the start to the end position of the computation. Determine the average of the data points at the same position across multiple periods. The resulting waveform is displayed. In the following example, the Cycle Count is set to 720 and the result of the cycle average is displayed.

), F2(

C12 + C2

steps). The resulting waveform is displayed. See page 1-12 for

C12 – C2

), variable T.

steps) and

Peak computation

Determine the maximum value at each point of the computed data and display the waveform. For each computation, the new computed value is compared with the past value and the larger value is kept.

1-22

Display the maximum value at each point

Three FFT data

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1.6 Other Useful Functions

Initialization ≡ Page 4-3. ≡

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.

Auto Set-up ≡ Page 4-4. ≡

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 set-up function may not work properly.

Snapshot ≡ Page 4-8. ≡

If single start or log 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 the SNAP SHOT key without stopping acquisition. The currently displayed waveform will be retained. This waveform is called a snapshot waveform. The snapshot waveform is displayed with a white color from that used for the updated waveform, making comparison between the two easier. Cursor measurements, automatic measurement of waveform parameters, and saving of the data cannot be done on the snap shot waveform, because it is a screen image data. However, screen image data output (hard copy) is possible.

Snapshot waveform

Functions

Clear Trace ≡ Page 4-8. ≡

IM 701830-01E

This function enables you to clear snapshot waveforms and accumulated waveforms, and restart the averaging process or repetitive sampling in a single operation.

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Page 37

1.6 Other Useful Functions

Displayed-data output functions ≡ Chapter 10. ≡

You use these functions to print the screen image to the built-in printer, to save the image data to disk or other storage medium, to plot the image on an external HP-GL compatible plotter, or to print the image to the centronics printer.

HP-GL compatible

plotter

Centronics

compatible printer

Note

The instrument provides a function which enables you to use the keyboard displayed on the screen 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 print-outs.

Disk saves and loads ≡ Chapter 11. ≡

The instrument standard configuration includes a built-in floppy drive. You can also choose to install an optional hard disk. It is also possible to save data to an external SCSI device. You can save data in any of the following formats: HP-GL command format, Postscript, TIFF, and BMP. This means that you can easily insert the saved images into documents produced by conventional DTP software packages.

DL716

internal HDD

External SCSI device

Action on trigger ≡ Page 13-5. ≡

The specified action from the following choices is carried out each time the trigger is activated.

• Sound a buzzer

• Save the waveform data to the specified media

• Output the screen image data to the specified media

Communications ≡ Interface User’s Manual (IM 701830-11E). ≡

The instrument is equipped with a GP-IB/RS-232 interface as standard. The interface enables you to send waveform data to a personal computer for analysis, as well as to perform waveform measurement while controlling the instrument using an external controller.

Communication interface

Personal computer

1-24

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Chapter 2 Name and Use of Each Part

2.1 Front Panel/Rear Panel

• Front panel

Menu keys (Page 2-4)

Press a key to display the corresponding menu.

MEASURE

CURSOR

HISTORY

MATH

REPLAY

ZOOM

CAL X-Y

SETUP

DISPLAY

ACQ

STAET/STOP

VERTICAL

CH 2CH 3CH

7LOG/C1 8 9 EXP

LOG/C2

CH 6CH 7CH

456m

CH 9CH 10CH 11CH

CH 13CH 14CH 15CH

0 ENTER

V/DIV TIME/DIV

TRIGGER

SIMPLE

RESET

HORIZONTAL

ENHANCED

LCD screen

16ch DIGITAL SCOPE

ESC

ALL CH

CLEARSNAP SHOT

PROTECT COPY MENU KEYBOARD FILE MI SC HELP SHIFT

ESC key

Closes pop-up menu or soft key menu.

Jog shuttle

Name and Use of Each Part

Changes the selected value or moves the cursor. The outer

SELECT

shuttles ring (outer ring) for fast setting increment.

VERTICAL group (Page 2-3)

Menu group used to make vertical axis.

HORIZONTAL group (Page 2-3)

TRIG D

POSITION /DELAY

Menu group used to make horizontal axis.

TRIGGER group (Page 2-3)

Menu group used to make trigger settings.

Functional earth terminal

Earth connection used for probe compensation.

COMP output (Page 3-15)

Outputs probe compensation signal.

• Side pannel

Centronics connector

Connects to a printer with a Centronics interface.

GP-IB connector

Connects to external plotter. (Page 10-8) For details about communication functions, refer to the instrument Communication Interface Manual (IM 701830-11E).

Floppy disk drive (Chapter 11) VIDEO OUT terminal (Page 12-3)

Extended logic input terminal (page 3-13, 3-14)

SCSI connector

OFF

100-120V/200-240V AC

250VA MAX 50/60Hz

INPUT A INPUT B INPUT A INPUT B

GP-IB(IEEE488)

CENTRONICS

OPTIONAL LOGIC 1

VIDEO-OUT(VGA)

SERIAL(RS-232) GO-NOGO EXT CLK IN TRG OUTTRG IN

POWER

OPTIONAL LOGIC 2

SCSI

Connects to an external hard disk, MO disk, or other external SCSI storage device. This connector can also be used to connect to a PC using SCSI.

External clock input terminal (Page 4-11)

Trigger output terminal (Page 12-2)

External trigger input terminal (Page 6-2 and 12-1)

GO-NOGO output terminal

Power connector (Page 3-4) Power switch (Page 3-5)

RS-232 connector

Connects to external plotter. (Page 10-8) For details about communication functions, refer to the instrument Communication Interface Manual (IM 701830-11E).

IM 701830-01E

Functional earth terminal

This terminal is used when connecting the GND cable of the high-voltage differential probe (700925, sold separately) and also to enhance grounding for making measurements.

Input terminals (Page 3-9 to 3-14)

Terminal for connecting probes and measurement cables.

2-1

Page 39

2.1 Front Panel/Rear Panel

• Top View

Built-in printer (Page 10-1)

Handle

Use the handle to lift and carry the unit.

2-2

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Page 40

2.2 Operation Keys/Jog Shuttle/Knobs

VERTICAL Group

VERTICAL

CH 1CH 2CH 3CH

7LOG/C1 8 9 EXP

LOG/C2

CH 6CH 7CH

456m

CH 9CH 10CH 11CH

CH 13CH 14CH 15CH

0 ENTER

V/DIV

HORIZONTAL Group

HORIZONTAL

TIME/DIV

Keys

CH1

CH16

Displays the menu for setting the ON/OFF state, offset voltage, coupling, probe attenuation,

preset, bandwidth limit, invert, linear scaling value for each channel. Also, it allows you to

select the channel to operate with the V/div knob (for voltage modules only). When the display is turned ON, the LED above the key lights up.

Press the

V/DIV

SHIFT + CH1 (CH2)

knob (Page 5-4)

keys (Pages 5-1 to 5-17)

keys to display the setup menu for “LOGIC1” (“LOGIC2”).

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 CH16). If you change the scale while acquisition is suspended, the new value becomes effective when acquisition resumes. This knob is applicable only to channels which have the voltage module installed.

TIME/DIV

knob (Page 5-2)

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.

Name and Use of Each Part

TRIGGER Group

TRIGGER

SIMPLE

ENHANCED

TRIG D

POSITION

/ DELAY

SIMPLE

key (Pages 6-1 to 6-9)

Displays the menu for the simple trigger, which triggers on a single trigger source. Simple

trigger mode is selected when the indicator located above this key is lit.

ENHANCED

The enhanced trigger menu for setting complex triggers such as A→B(n) trigger, is displayed. Enhanced trigger mode is selected when the indicator located above this key is lit.

POSITION/DELAY

Use this key to set the trigger position or trigger delay.

TRG’D

Lights up when a trigger is activated.

key (Pages 6-1 to 6-8 and 6-10 to 6-20)

key (pages 6-6 to 6-8)

indicator

IM 701830-01E

2-3

Page 41

2.2 Operation Keys/Jog Shuttle/Knobs

Other Menus

MEASURE

CURSOR

HISTORY

MATH

REPLAY

ZOOM

CAL X-Y

SETUP

DISPLAY

ACQ

STAET/STOP

RESET

SELECT

ALL CH

PROTECT COPY MENU KEYBOARD FILE MISC HELP SHIFTCLEARSNAP SHOT

MEASURE

key (Pages 9-4 to 9-8)

Displays the menu for performing automatic measurement of waveform parameters.

CURSOR

key (Page 9-1)

Displays the menu for cursor measurement.

HISTORY

key (Page 7-6)

Displays the menu for recalling data from the history memory.

MATH

key (Pages 9-9 to 9-23)

Displays the menu for waveform computation.

Replay

key (Page 8-15)

Displays the menu for scrolling the waveform.

ZOOM

key (Page 8-12)

Displays the menu for zoom setup.

SETUP

key (Page 4-3 and 4-4)

Displays the auto setup menu which automatically sets the keys to the appropriate values with respect to the input signal and the initialize menu which resets the key settings to their factory setting values. If you press the

DISPLAY

key (Chapter 8)

SHIFT

SETUP

, the screen displays the calibration menu.

Displays the screen display menu. Press

SHIFT+DISPLAY

ACQ key

(Chapter 7)

to produce the menu for X-Y display setup.

Displays the acquisition method menu.

START/STOP

key (Page 4-6)

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.

2-4

Arrow keys (< > keys)

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

Protect

key

Locks the operation keys.

SNAP SHOT

key (Page 4-7)

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

IM 701830-01E

Page 42

2.2 Operation Keys/Jog Shuttle/Knobs

CLEAR

Deletes the currently displayed waveform.

COPY

Used for printing out hard copy of the screen data. If you press screen image. For the save location, you can select any of the following: internal printer (optional), GP-IB interface, or storage medium (floppy, MO, or external SCSI).

KEYBOARD

Pressing the the 10 keys (channel keys) to enter the values.

FILE

Displays menu that you use to save to, load from, or execute file operations on floppy disk, MO disk, or external SCSI device.

MISC

Displays the menu for selecting GO/NO-GO judgment, GP-IB interface, system configuration settings, system status check, screen saver setting, and the self-diagnostic function.

SHIFT+CLEAR

Clears the remote state.

HELP

Sets help window ON or OFF.

SHIFT

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, the shift mode is active.

key (Page 4-7)

key (Chapter 10)

SHIFT+COPY

key

KEYBOARD

key (Pages 11-4 to 11-17)

key (Pages 3-6, 3-8, 11-18; Chapter 13; IM 701830-11E)

key (IM701830-11E)

key (Page 4-9)

key

, the screen displays a menu that you can use to print or save the

key displays a screen for entering numerical values. You can use

Name and Use of Each Part

ALL CH

Display the setup menu of all channels over the entire screen and set the parameters.

key (Page 5-25)

IM 701830-01E

2-5

Page 43

2.3 Screens

5 6

10 11

1 V/div

Displays the voltage axis sensitivity of the selected channel.

2 Acquisition mode

Displayed when the acquisition mode is averaging, envelope, or box average.

3 Screen position bar

Normal waveform

Record length

500k

Display record length (not displayed when it is equal to the record length)

Record length

Trigger position

Displayed record length

Zooming waveform

500k

Displayed record length

Zoom position

z1 z2

4 T/div, sample rate

The sample rate varies according to the T/div setting and the record length.

5 Ground level

6 Vertical position

7 Display format

The waveform display screen can be divided into 1, 2, 3, 4, 6 or 8 sections. (Refer to page 8-1.)

8 Trigger level

9 Acquisition state

Running : Acquisition is in progress. Auto Calibration : Auto calibrating. Stopped : Acquisition is stopped. Waiting for trigger

10 Number of acquisitions

The number of acquisitions performed is displayed.

11 Comment

Displays a comment which will be added when screen data is output to, for example, the built-in printer.

12 Date/time

For adjustment of the date/time, refer to “3.4 Setting the Date and Time”.

13 Soft key menu

Note

• The instrument’s color LCD display has a defective pixel ratio of approx. 0.02%.

• The mark “∗” flickers on upper left of the display in the following case. Green ∗ : Computation in progress Red ∗ : Display update in progress Yellow ∗ : Automatic measurement of waveform parameter in progress

2-6

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Page 44

Chapter 3 Before Starting Observation and Measurement of Waveforms

3.1 Precautions During Use

Safety Precautions

When you are using this instrument, read the “Safety Precautions” given on page 5 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 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. Refer to page 2 for the part number to use when placing an order.

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.

Before Starting Observation and Measurement of Waveforms

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

When moving the instrument

Disconnect the power cord and connecting cables. Always carry the instrument by the handles as shown 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.

IM 701830-01E

3-1

Page 45

3.2 Installing

Installation Conditions

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

Flat horizontal location

Set the instrument in the proper direction and in a level and stable place. If placed in an uneven or unstable place, printing quality decreases. Note that the instrument can be tilted on the stand.

Well-ventilated location

Vent holes are situated on the bottom side of the instrument. In addition, vent holes for the cooling fans are also situated in the left side and the bottom. To prevent a rise in the internal temperature, the vent holes should not be blocked and sufficient clearance should be maintained around them.

5cm or more

When connecting the various cables or when opening or closing the built-in printer cover, take extra space in addition to the space indicated above for the operation.

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

3-2

IM 701830-01E

Page 46

Installation Position

Rubber feet

3.2 Installing

Place the instrument in a horizontal position or with the rear panel facing down as shown in the figure below. When using the stand, pull it until it locks. When not in use, push the stand inwards to its original position.

Before Starting Observation and Measurement of Waveforms

When using the instrument in a horizontal position, attach four rubber stoppers to the feet to prevent the instrument from sliding.

IM 701830-01E

3-3

Page 47

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

• Connect the power cord after confirming that the voltage of the power supply complies to the rated electric power voltage for the instrument.

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

• Always use protective earth to prevent electric shock. Connect the instrument power cord to the 3-pin power outlet with earth terminal.

• Do not use non-earth extension cords or other measures that defect the protective earth.

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

Connecting the Power Cord

1. Make sure that POWER switch is OFF.

2. Connect the plug of the accessory power cable to the power connector on the left side 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-pin type with a protective earth terminal.

Item

Rated supply voltage 100 to 120 VAC/200 to 240 VAC (Switchable) Permitted supply voltage range 90 to 132 VAC/180 to 264 VAC Rated supply voltage frequency 50/60 Hz Permitted supply voltage frequency range 48 to 63 Hz Maximum power consumption 250 VA (when the built-in printer is used)

3-4

IM 701830-01E

Page 48

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 “Installing” (page 3-

2). Check that the power cord is connected correctly as sown in Section 3.3 “Connecting the Power Cord” (page 3-4).

3.3 Connecting the Power Cord

Turning the power ON/OFF

Pressing the power switch on the left side of the instrument to the “ON( | )” side, turns the power ON. Pressing it to the “OFF(O)” side turns the power OFF.

Response at Power ON

Self test and calibration start automatically when the power switch is turned ON. It takes approximately 30 seconds; if the check results are satisfactory, the normal waveform display screen will appear.

Note

Before Starting Observation and Measurement of Waveforms

If calibration does not start when the power is turned ON, or if the normal waveform display screen does not appear, check the following points.

• Check that the power cord is plugged in properly.

• Check that the correct voltage is being supplied from the AC outlet. (Refer to page 3-4.)

• If the power switch is turned ON while the INITIALIZE key is pressed, all settings will be reset to the factory settings. For details, refer to Section 4.2 “Initializing Settings” (page 4-3).

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.

For Accurate Measurement

Response at Power OFF

IM 701830-01E

Turn the power switches ON and allow the unit to warm up for at least 30 minutes. After warm-up is complete, perform calibration. (Refer to Page 4-9.)

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 when the power is turned ON. If this message is displayed frequently, the lithium battery needs to be changed quickly. The battery cannot be replaced by the user, so contact the nearest YOKOGAWA representative listed on the back cover of this manual.

3-5

Page 49

3.4 Setting the Date and Time

Function

Date (YY/MM/DD)

The last two digits of the year are used to set the year (YY). Years 2000 to 2079 are represented by 00 to 79, and years 1980 to 1999 are represented by 80 to 99.

Time (HH:MM:SS)

The 24-hour clock is used.

Note

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

• Leap years are taken into account.

Operating Procedure

Displaying the System Configuration Menu

1. Press the

2. Press the “System Config” soft key to display the system configuration setting menu.

Setting the Date and Time

3. Press the “Date” soft key to display the keyboard.

4. Enter the current date as described on page 4-2.

5. In the same way, press the “Time” soft key and enter the current time.

MISC

key.

Turning the Date/Time Display ON/OFF

3. Press the “Date & Time” soft key to select either ON or OFF. The date and time will be

displayed on the screen if ON is selected, and will not be displayed if OFF is selected.

→

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3.5 Installing the Input Module

WARNING

• To prevent electric shock and damage to the instrument, make sure to turn OFF the power before installing or removing the input module.

• Check that the input cable is not connected to the input terminals before installing or removing the input module.

• To prevent electric shock and to satisfy the specifications, make sure to put the accessory cover plate on the slots that are not being used. Using the instrument without the cover plate allows the dust enter the instrument and may cause malfunction due to the rise in temperature inside the instrument.

• If the input module happens to come out of the slot while it is in use, it may cause electric shock or cause damage to the instrument as well as the input module. Make sure to screw the input module in place at the two locations (top and bottom).

• Do not put your hand inside the slot, because you may injure your fingers on protrusions.

Types of input modules

Following 7 types are available.

• High-Speed Isolation Module (Model No. : 701855)

• High-Speed Module (Model No. :701856)

• High-Resolution, High-Voltage, Isolation Module (Model No. : 701852)

• High-Resolution, Isolation Module (Model No. : 701853)

• Temperature Module (Model No. : 701860)

• Logic Input Module (Model No. : 701870)

• Strain Module (Model No. : 701880)

Before Starting Observation and Measurement of Waveforms

When installing or removing the input modules

• Switching the installed input module with a different module and turning ON the power initializes the setting values on that channel. To save the settings, specify the destination media and save the setting values (refer to Section 11.7 “Saving/Loading Set-up Data”).

• When using only four or eight channels to measure with a longer record length, install the modules in the following channels.

No. of channel used Channels to install

4 CH1, CH5, CH9, CH13 8 CH1, CH3, CH5, CH7, CH9, CH11, CH13, CH15

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3.5 Installing the Input Module

Installation procedure

1. Make sure the POWER switch is OFF.

2. Check the channel number indicated above the slots for installing the input modules on the

right side of the instrument. Then, install the module along the guide. Holding the handles on the top and bottom of the input module, press hard until it clicks in place. If there is a cover plate on the slot in which to install the module, remove the cover plate, first.

3. Make sure to screw the two locations, top and bottom, of the input module firmly into place.

4. Turn ON the power switch.

5. Check to see that the correct input module name is displayed at the corresponding channel

number in the overview screen. If the display is not correct, remove the module according to the steps in “Removal” shown below, and reinstall the module according to steps 1 to 3 shown above. For details on the overview screen, refer to Section 14.4 “Checking the System Condition (Overview).”

Guide

Removal

Input module

High-Speed Isolation Module(701855) High-Speed Module(701856) High-Resolution, High-Voltage, Isolation Module(701852) High-Resolution, High-Voltage Module(701853) Temperature Module(701860) Logic Input Module(701870) Strain Module(701880)

Abbreviation

HS_ISOL HS HR_HV

HR TEMP LOGIC STRAIN

1. Make sure the POWER switch is OFF.

2. Loosen the screws holding the input module in place.

3. Holding the handles on the top and bottom of the input module, pull out the module.

Note

High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation/Temperature/Logic Input Modules are only operate in products with software Version 2.00 or later. For details, please contact the dealer from which you purchased them.

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3.6 Connecting a Probe

(For High-Speed Isolation/High-Speed Modules)

Connecting a probe

Connect the probe (or other input cables such as the BNC cable) to any of the input terminals of the High-Speed Isolation/High-Speed Module.

• When connecting the item to be measured, make sure to turn OFF the power on the item. Connecting or disconnecting the measurement input cable while the item being measured is turned ON is very dangerous.

• When making a voltage measurement on a common mode input voltage which is above 42 V (DC+ACpeak) with the High-Speed Isolation Module, make sure to use the dedicated probe, 700929.

• Applying a power above the value indicated below may cause damage to the input section. At a frequency above 1 kHz, damage may occur even when the voltage is lower than this voltage.

For High-Speed Isolation Module (701855)

Maximum input voltage (at a frequency of 1 kHz or less)

• Main instrument only (across the input terminals, H and L*

250 V (DC+ACpeak)(CAT I and II, 177 Vrms)

• Combined with 700929 (across the probe tips, H and L*

850 V (DC+ACpeak)(CAT I and II, 600 Vrms)

WARNING

Before Starting Observation and Measurement of Waveforms

)

Maximum allowable common mode voltage (at a frequency of 1 kHz or less)

• Main instrument only (across the input terminal, L, and earth*

)

42 V (DC+ACpeak)(CAT I and II, 30 Vrms)

• Combined with 700929 (across the probe tip, H or L, and earth*

) 400 Vrms (CAT I and II) (Specification when the EN61010-1 standard does not need to be satisfied: 600 Vrms)

For High-Speed Module (701856)

Maximum input voltage (across the input terminals, H and L*

, at a frequency of 1 kHz or less) 250 V (DC+ACpeak)(CAT I and II, 177 Vrms)

Main instrument only

701855 Input terminal

earth

701856 Input terminal

earth

Combined with 700929

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3.6 Connecting a Probe

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 Section 3.10 “Compensating the Probe (Phase Correction)” . Failure to do so may result in unstable gain across different frequencies, thereby preventing correct measurement. Make the phase correction on each channel to which the probe is to be connected.

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

Points to note when using a probe other than 700998 and 700929

• 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 5.6 “Selecting Probe Attenuation” (page 5-7) so that the probe’s attenuation matches the one displayed below “Probe” in the soft key menu. If they do not match, measured values cannot be read correctly.

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3.7 Connecting a Input Cable

(For High-Resolution, High Voltage, Isolation/High-Resolution, Isolation Modules)

Connecting a measurement cable

Connect the measurement cable to any of the input terminals of the High-Resolution, HighVoltage, Isolation/High-Resolution, Isolation Module.

WARNING

• When connecting the item to be measured, make sure to turn OFF the power on the item. Connecting or disconnecting the measurement cable while the item being measured is turned ON is very dangerous.

• To prevent electric shock, make sure to use the measurement cable suitable for the voltage range being measured on the input terminals of the High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Module.

CAUTION

• Applying a power above the value indicated below may cause damage to the input section. At a frequency above 1 kHz, damage may occur even when the voltage is lower than this voltage.

For High-Resolution, High-Voltage, Isolation Module (701852)

Maximum input voltage (across the input terminals, H and L* kHz or less) 850 V (DC+ACpeak)(CAT I and II, 600 Vrms)

Maximum allowable common mode voltage (across the input terminal, H or L, and

earth*

, at a frequency of 1 kHz or less) 400 Vrms (CAT I and II) (Specification when the EN61010-1 standard does not need to be satisfied: 600 Vrms)

, at a frequency of 1

Before Starting Observation and Measurement of Waveforms

For High-Resolution, Isolation Module (701853)

Maximum input voltage (across the input terminals H and L*

, at a frequency of 1 kHz or less) 100 V (DC+ACpeak)(CAT I and II, 70 Vrms)

Maximum allowable common mode voltage (across the input terminal, H or L, and

earth*

, at a frequency of 1 kHz or less) 400 Vrms (CAT I and II) (Specification when the EN61010-1 standard does not need to be satisfied: 600 Vrms)

• Do not connect a plug-in type terminal with exposed conducting parts to the input terminal to be used as a measurement lead. It is very dangerous, if the connector happens to come off.

701852 Input terminal

For measuring voltages of 42 V or less

earth

For measuring voltages of 42 V or more

701853 Input terminal

earth

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3.8 Connecting a Thermocouple

(For Temperature Module)

Connecting a thermocouple

Connect the thermocouple strand directly to the input terminals of the temperature module.

CAUTION

• The temperature module is insulated from the main instrument. However, if a voltage exceeding the value indicated below is applied, it may cause damage to the input section. At a frequency above 1 kHz, damage may occur even when the voltage is lower than this voltage. Maximum input voltage (across the input terminals, H and L, at a frequency of 1 kHz or less) 42 V (DC+ACpeak)(CAT I and II, 30 Vrms)

Maximum allowable common mode voltage (across the input terminal, L, and earth, at a frequency of 1 kHz or less) 42 V (DC+ACpeak)(CAT I and II, 30 Vrms)

• If the + terminal and - terminal are reversed, correct measurement cannot be made.

• Immediately after connecting the thermocouple, the heat balance may be disturbed at the input terminal section and may cause measurement errors. Therefore, wait about ten minutes before making a measurement.

• In an environment where the air from the air conditioning is directly applied to the input terminals or where there are effects from a heat source, the heat balance may be disturbed at the input terminal section and cause measurement errors. When making measurements in these environments, take preventive measures such as changing the position.

3-12

Compensating leadwire (or thermocouple element wire)

To the thermocouple

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3.9 Connecting a Logic Probe

(For Logic Input Module and /N1 32-bit extended logic input)

CAUTION

• Applying a voltage exceeding the voltage indicated below may cause damage to the logic probe or the instrument. At a frequency above 1 kHz, damage may occur even when the voltage is lower than this voltage. Maximum input voltage (at a frequency of 1 kHz or below) High-speed logic probe (700986) 42 V (DC+ACpeak) Isolation logic probe (700987) 250 Vrms (except ACpeak is 350 V or less, DC

• On the high-speed logic probe, the 8 input lines on each POD have a common earth. In addition, the earth for the instrument and the earth for each POD are also common. Do not connect inputs which have different common voltages, as doing so may cause damage to the main unit, logic probe, or other connected instruments.

• Each input terminal of the isolation logic probe is isolated from all other input terminals and the isolation logic probe is isolated from the DL716.

• Make sure to turn off the instrument before connecting or disconnecting the 26-pin connector from the logic input connector.

• Do not stack the isolation logic probes during use. Also, allow enough space around the probes to avoid a temperature increase inside the probes.

Before Starting Observation and Measurement of Waveforms

is 250 V or less)

Logic Input Connector

About the Logic probe

Connect the accessory logic probe (700986 or 700987) to either of the logic probe input connectors (the two connectors indicated POD A and POD B).

There are two types of probes available for connecting to the logic input connector of the DL716.

• High-speed logic probe (700986)

• Isolation logic probe (700987)

Use the following leads to connect to the point of measurement.

The types of connecting leads that can be used on the high-speed logic probe (700986)

The following two types are available.

• Connecting lead (alligator clip, parts No. B9879PX) This lead is mainly used for connecting contact circuits. The lead consists of 8 signal lines (red) and 8 earth lines (black).

• Connecting lead (IC clip, parts No. B9879KX) This lead is mainly used for connecting electronic circuits. The lead consists of 8 signal lines (red) and 2 earth lines (black).

The types of connecting leads that can be used on the isolation logic probe (700987)

The following two types are available.

• For measuring voltages of 42 V or less : Measurement lead, Model 366961

• For measuring voltages of 42 V or more : Measurement lead, Model 758917

Do not alter the connecting leads. Doing so may cause the leads from satisfying the specification.

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3.9 Connecting a Logic Probe

Connecting the Logic Probe

High-speed logic probe (700986)

1. Attach the accessory connecting lead (IC clip or alligator clip) to the logic probe, and lock

Isolation logic probe (700987)

1. Connect the measuring lead to the input terminal of the logic probe.

2. Set the input switch. The threshold level is set to 50 VAC ± 50% (Hi : 80 to 250 VAC, Lo :

Connecting the logic probe to the Logic Input Module

3. Turn OFF the instrument.

4. Connect the end with the 26-pin connector (clamp filter with ferrite core, parts No.

5. Turn ON the instrument.

the connector by clamping the lever inwards. To release the connecting lead from the logic probe, pull both levers outwards. Continue with step 3.

0 to 20 VAC) and 6 V ± 50% (Hi : 10 to 250 VDC, Lo : 0 to 30 VDC) when set to “AC” and “DC,” respectively.

A1190MN) of the logic probe to the input connector of the Logic Input Module.

To the input connector of the Logic Input Module

Note

• Each bit is displayed as “L level” when the logic probe is not connected to the instrument.

• For the specifications of the logic probe, refer to Section 15.23 “Logic Input Module.”

• The display for the 32-bit extended logic input is turned OFF as default. For turning ON/OFF the display, see 5.1 “Turning Channels ON/OFF.”

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3.10 Compensating the Probe (Phase Correction)

When making measurements using the probe on the High-Speed Isolation Module or HighSpeed Module, make sure to phase correct the probe, first.

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 COMP output terminal and connect the earth wire to the

functional earth terminal.

4. Perform auto set-up using the procedure described on page 4-4.

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

the displayed waveform becomes square.

Functional earth terminal

CAUTION

COMP signal output terminal

Before Starting Observation and Measurement of Waveforms

Phase adjusting hole

Explanation

Reason for probe compensation

If the probe’s input capacitance is outside the specified range, the gain will not be constant across different frequencies, preventing display of the correct waveforms. The input capacitance varies depending on the probe used, so the variable capacitor (trimmer) provided on the probe must be adjusted. Probe compensation must be performed when the probe is to be used for the first time. Moreover, the appropriate input capacitance varies according to which channel is used, so probe compensation is required when the probe is switched from one channel to another.

Compensation signal

A COMP signal (square waveform) of the following characteristics is output from the COMP terminal on the front panel. Frequency : 1 kHz±10% Amplitude : 1 V±10%

Waveform differences

Correct waveform Over-compensated

(gain is too high at high frequency)

Under-compensated (gain is too low at high frequency)

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3.11 Connecting the Bridge Head

(For Strain Module)

Connect a strain gauge bridge (bridge head) or strain gauge transducer and measure the strain. This section describes the procedures for connecting YOKOGAWA's bridge head (700932/

700933) and precautions regarding the connection. For details on connecting other strain gauge bridges and strain gauge transducers, see the corresponding manuals.

CAUTION

Do not connect any other devices other than strain gauge bridge and strain gauge transducer to the strain module. Connecting other devices or applying voltages exceeding the value shown below can damage the input section. Maximum input voltage (across terminals)

5 V (DC+ACpeak)

Maximum allowable common mode voltage (across each terminal and earth)

42 V (DC+ACpeak) (CAT I and II, 30 Vrms)

Connecting the Strain Gauge

Bridge head 700932/700933 supports six types of connecting methods: single-gauge method, single-gauge three-wire method, adjacent-side two-gauge method, opposed-side two-gauge method, opposed-side two-gauge three-wire method, and four-gauge method. For details, see the manual, IM700932-01E that came with bridge head 700932/700933. If you are using a strain gauge bridge other than 700932/700933 or a strain gauge transducer, then see the corresponding manuals.

Connecting the Strain Module and the Bridge Head

When using bridge head 700932/700933

Connect the strain module and the bridge head using the cable that is included with 700932/

700933.

Strain module

Bridge head

700932/700933

Cable

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3.11 Connecting the Bridge Head

When using a bridge head with MIL Standard connector wiring

The connector for the strain module is a NDIS connector*. Convert MIL to NDIS using YOKOGAWA's connector conversion cable 700935, then connect to the strain module.

*A connector recommended by JSNDI (The Japanese Society for Non-destructive Inspection).

Strain module

Bridge head with MIL-C-26482 standard

Connector Conversion

cable 700935

Pin assignments (cable side)

of the NDIS connector

Top view Top view

A:Bridge+ B:Input–(measurement signal–)

C: Bridge– D: Input+(measurement signal+)

E:Floating common

F:Sense+ G: Sense–

Pin assignments of the

MIL-C-26482 compatible connector

When using YOKOGAWA's A1002JC connector

You can make a cable using the A1002JC connector that matches the connector of the strain module and use the cable to connect strain gauge bridges and strain gauge transducers to the strain module.

NDIS connector A1002JC

connector wiring

Pin assignments

Top view

A:Signal+ B:Signal– C: Excitation+ D: Excitation– E:NC(not connection) F:NC(not connection)

A:Bridge+ B:Input–(measurement signal–) C: Bridge– D: Input+(measurement signal+) E:Floating common F:Sense+ G: Sense–

Pin correspondence

NDIS MIL

Before Starting Observation and Measurement of Waveforms

A B C D

C B D A

Note

To avoid external noise, we recommend that you use shielded wires when making cables.

CAUTION

Be careful when wiring the connector. If there is a short or an error in the wiring, it can damage the main instrument or other devices connected to the main instrument.

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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 enter values directly irrespective of the currently displayed menu.

V/DIV

and

TIME/DIV

V/DIV knob

Note

Before turning the one of the keys CH1 to CH16.

V/DIV

knob is applicable only to channels which have the voltage module (701855, 701856, 701852 and

701853) installed.

knobs

VERTICAL

CH 1CH 2CH 3CH

7 LOG/C1 8 9 EX P

LOG/C2

CH 6CH 7CH

456m

CH 9CH 10CH 11CH

CH 13CH 14CH 15CH

0 ENTER

V/DIV TIME/DIV

TRIGGER

SIMPLE

V/DIV

HORIZONTAL

TRIG D

POSITION

ENHANCED

/DELAY

knob, the channel for which you are going to use the knob must be selected using

TIME/DIV knob

Common Operations

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 shuttle ring (the outer ring of the shuttle) allows you to enter values in larger steps than the jog 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.

Note

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

Entry using the KEYBOARD key

When setting a parameter that displays a “

” mark on the soft key, pressing the key opens a numerical input screen. You can enter the value using the 10 keys, as well as the “.,” “-,” “EXP,” “m,” and “µ” keys. Pressing the “

ENTER

” key (“

CH16

” key) confirms the input. Pressing the

RESET

key clears the input. Moving the cursor with the arrow keys and reentering a value overwrites the previous value. Pressing the

ESC

KEYBOARD

key closes the numerical input screen and cancels the input.

RESET

key.

KEYBOARD

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4.1 Entering Values and Character Strings

Entering a Character String

Date/time, file name and comment can be entered using the keyboard displayed on the screen. Operate the keyboard using the jog shuttle, string as follows.

Entry using the keyboard

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

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

2. Press the

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

4. Enter “ENT” to enter the string.

SELECT

key to enter the character.

key and arrow key to enter a character

Keys other than characters

DEL : Deletes the character at the cursor location. INS : Switches between insert and overwrite modes. The indicator will be lit during insert

mode. CLR : Deletes all displayed characters. SPACE : Enters a space. ENT : Confirms the displayed characters. CAPS : Switches upper case and lower case letters.

Number of characters and types available

Number of characters Available characters

Date, time Specified number 0 to 9 (/:) File name 1 to 8 0 to 9, A to Z, %, _, (,) Comment 0 to 30 All characters (including space)

* The maximum length of the comment when saving waveform data or set-up data is 20 characters.

Note

• Comments and file names can both contain both upper and lower case letters. However, file names are NOT case sensitive. The following five file names are not allowed due to MS-DOS restrictions. AUX, CON, PRN, NUL and CLOCK

• When using GP-IB/RS-232 interface commands to enter a file name, the following symbols which are not available on the keyboard displayed on the screen can also be used. !, #, $, &, ‘, -, ^, @,~, { }

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4.2 Initializing Settings

Function

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, refer to the Appendix 5.

Settings which cannot be initialized

Date and time GP-IB/RS-232 interface related settings SCSI ID number

To cancel initialization

If you have performed initializatioE†by mistake, press the “Undo” soft key. This will restore the previous settings used before the initialization was performed. The “Undo” operation remains available only while power stays on.

Initialization at power ON

Turning the power switch ON while holding down the also initializes settings relating to the GP-IB/RS-232 interface and SCSI ID number.

RESET

key will start initialization. This

Common Operations

Operating Procedure

Performing initialization

1. Press the

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 before

initialization.

Note

The display for the 32-bit extended logic input turns OFF after initialization.

SETUP

key.

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4.3 The Auto Set-up Function

Function

The auto set-up function automatically sets each key setting, such as the V/div, T/div and trigger level, to the optimum value for the input signal.

Center position after auto set-up

0V : Sets the center position to “0 V”. Convenient when you want to see the relation

between the ground level and the waveform.

offset : Sets the center position to the offset value. Convenient when you want to see the

waveform with maximum amplitude.

An example of auto set-up: The following screens show the square waveform with an offset of 1 V and an amplitude of 500 mVp-p after auto set-up.

Auto set-up (0 V) Auto set-up (offset)

Setting channel(s)

CH1 to CH16 : Auto set-up is performed only for the selected channel. Select the channel

using one of the keys CH1 to CH16. However, if auto set-up is performed on a channel which has a temperature module or a logic input module installed, an error message is displayed.

ALL : Auto set-up is performed for all channels. However, channels which have

temperature modules or logic input modules installed are excluded from the auto set-up.

Canceling auto set-up

To cancel auto set-up, just press the “Undo” soft key. This will restore the previous state which was in effect before the auto set-up.

Waveforms for which auto set-up is effective

Frequency : Approx. 50 Hz to 100 kHz Amplitude : Approx. 100 mVp-p or higher when the probe attenuation is 10:1. Type : Repetitive (but not complex) waveform

Where input coupling is DC.

Note

The auto set-up function may not operate correctly in certain cases such as when the waveform contains DC components or high frequency components.

4-4

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4.3 The Auto Set-up Function

Settings made by auto set-up

Waveform acquisition and display

Acquisition mode Normal Acquisition count Infinite Record length 1 kword Accumulation mode OFF Zoomed waveforms Traces set ON for display (realtime OFF)

Vertical-axis settings

V/div Set so that amplitude is between 2 divp-p and 7 divp-p

(approximately)

Offset voltage At Center 0 V : 0 V

At Center Offset : Center value of the maximum and minimum

values of the input signal Vertical position 0div Coupling DC Inverse display OFF Display ON/OFF If “All” channels are selected, only channels with active input signals

are set ON for display. If a single channel is selected, only that channel is set ON for display.

Horizontal-axis settings

T/div Set so that screen displays 2 to 4 periods of the auto-setup waveform

with the longest period.

Time Base Set the time base to “Int.”

Trigger settings

Trigger type SIMPLE Trigger source The auto-setup channel with the longest period (if “All” channels are

selected), or the target channel (if a single channel is selected). Trigger level and slope Level is 1/2 the trigger source amplitude. Slope is “rising.” Trigger coupling DC Hysteresis (High sensitivity) Holdoff time 0ns Trigger position 50% Trigger delay 0s

Common Operations

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

Note

• Auto-setup is not applied to channels whose input signals do not meet the required setup conditions.

• If auto-setup cannot execute on all channels, the trigger source is set to CH1.

Operating Procedure

Selecting the center position and channel and performing auto set-up

1. Press the

2. Press the “Auto Setup Center” soft key to select “0V” or “Offset”.

3. Press the “Auto Setup” soft key to display the channel selection menu.

4. Select the desired channel (ALL, or CH1-CH16) using the jog shuttle.

“CH1” to “CH16” can be directly selected by pressing

5. Press the “Auto Setup” soft key to start auto set-up.

Following auto-setup, display for these channels will be set OFF (even if an input signal is present.)

SETUP

key. The set up menu will appear.

CH1

CH16

IM 701830-01E

Canceling auto set-up

6. Press the “Undo” soft key. This will restore the previous state which was in effect before

the auto set-up.

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4.4 Starting and Stopping Acquisition

Function

The following three methods are available for starting and stopping acquisition. Using the

Using the “Single Start” soft key : Pressing the soft key sets the trigger mode to normal (ACQ menu) mode. When a trigger is activated the specified record

Using the “Log Start” soft key : Pressing the soft key disables the trigger mode. The (ACQ menu) specified record length of data is acquired once and the

When the display is in roll mode, the “Single Start” or “Log Start” operation is as follows.

• By pressing the “Single Start” soft key, the trigger mode is set to normal mode. After

• By pressing the “Log Start” soft key, the trigger mode is disabled. After acquiring the

* The change in the trigger mode due to pressing the “Single Start” and “Log Start” soft

Starting and stopping during averaging or sequential store mode

Stopping acquisition will also stop data processing. Re-starting acquisition will start data processing from the scratch.

START/STOP

acquiring the specified record length of data following a trigger activation, the displayed waveform stops.

specified record length of data, the displayed waveform stops.

keys does not affect the trigger mode setting of section 6.1.

key : The data are continuously acquired and displayed

according to the trigger mode setting (see section 6.1).

length of data is acquired once and the waveform is displayed.

waveform is displayed.

Starting and stopping while accumulation is in progress

Stopping acquisition will stop accumulation temporarily. Re-starting acquisition will resume accumulation from the point at which acquisition was stopped.

The START/STOP key and “Single Start,” “Log Start” soft keys are not operative in the following cases.

The instrument is in remote state, controlled via the communication interface. The instrument is in operation, for example, it is in the process of printing out, performing auto set-up, or replaying (allto scroll).

Setting the waveform acquisition mode at power ON

You can select whether or not to start waveform acquisition when the power turns ON. For example, you can set this mode to ON if you want to start waveform acquisition when the power turns ON after a power failure. ON : Start waveform acquisition when the power turns ON. OFF : Do not start waveform acquisition when the power turns ON. Initial setting is OFF.

Note

• Pressing certain keys (such as the setting causes acquisition to stop immediately.

• If you change the acquisition conditions, all data already in acquisition memory is lost when acquisition resumes.

• The snapshot function, which retains the waveforms currently displayed on the screen, is also available. This function allows update of the display without stopping acquisition. (Refer to page 4-8.)

FILE

HISTORY

key) or changing the “Realtime Out” soft key

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Operating Procedure

Using the

Acquisition starts and stops alternately each time the indicator on the

Using the “Single Start,” “Log Start” soft keys

1. Press the

2. If the “Single Start” soft key is pressed and the trigger is activated, the waveform is

acquired once. When the “Log Start” soft key is pressed the waveform is acquired once. When acquisition is complete, acquisition stops automatically (the indicator above the

START/STOP

ACQ

key.

key turns off).

4.4 Starting and Stopping Acquisition

key

START/STOP

key is lit, acquisition is in progress.

key is pressed. If the

Common Operations

Setting the waveform acquisition mode at power ON

1. Press the

2. Press the “Next” soft key to display the “Next2/2” menu. Then, press the “Others” soft

key.

3. Press the “Start Mode (Power ON)” soft key and select “ON” or “OFF.”

MISC

key.

→

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4.5 The Snapshot and Clear Trace Functions

≡ For a description of this function, refer to page 1-22. ≡

Function

Snapshot

This function retains the waveforms currently displayed on the screen. It also enables update of the display without stopping acquisition. 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

• Output to external plotter or other location

• Move the vertical position of the waveform

• Set the offset voltage

• Save the waveform data

• Display the X-Y waveform

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

SNAP SHOT

cases.

• The instrument is in remote state, controlled via the GP-IB interface.

• The instrument is in operation, for example, it is in the process of printing out or performing auto set-up.

key and

CLEAR TRACE

key are not operative in the following

Operating Procedure

Snapshot

Press the

Clear trace

Press the

Averaging and measurement will also be started from the scratch. (The count is reset to “0”.)

SNAP SHOT

CLEAR

key. The clear trace process will start.

key. The snap shot process will start.

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4.6 Calibration

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation Modules)

Function

Calibration

The following parameters can be calibrated. Perform calibration when highly accurate measurements are required. Ground level offset A/D converter gain

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 ±2°C).

Note

The above calibration is performed automatically when power is turned ON or when the V/DIV knob is turned.

Auto calibration

If “AutoCal” is set to “ON”, auto calibration is performed after the time shown below passes and the first time the time axis setting (T/div) is changed. After turning ON the power

•3 minutes pass

• 10 minutes pass

• every 30 minutes from here on after

Operating Procedure

Performing calibration

1. Press the

2. Press the “Calibration” soft key to start calibration.

SHIFT+SETUP

Common Operations

key. The Calibration menu will appear.

Auto calibration

2. Press the “AutoCal” soft key to select “ON.”

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4.7 Using the Help Function

Function

Displaying a help window

Pressing the 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. For the

HELP

key displays the soft key menu which was in effect before the

COPY

key only, pressing the key actually carries out the copy.

HELP

key

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4.8 Selecting the Time Base

Function

Selecting the time base

Select the time base from the following choices. Int : Internal clock signal (TIME/DIV knob is effective) Ext : Clock signal input through the external clock input terminal (TIME/DIV knob is

ineffective)

When selecting “EXT”

Apply a clock signal to the terminal that is indicated as “TRIG OUT/EXT CLK IN” (used also for trigger output) on the left side of the instrument. Follow the specifications shown below.

EXT CLK IN

Connector type BNC Frequency range 100 kHz or less (Module 701852 and 701853) Input level TTL level (0 to 5 V) Minimum pulse width 400 ns for High and Low Applicable module High-Resolution, High-Voltage, Isolation Module (701852)

High-Resolution, Isolation Module (701853) Temperature Module (701860) Logic Input Module (701870) Strain Module (701880) 32-bits extended logic input

Inapplicable module High-Speed Isolation Module (701855, 701850)

High-Speed Module (701856, 701851)

Common Operations

Circuit diagram of the external clock input/timing chart

+5 V

100 Ω

10 µs or more

400 ns or more

External clock input

Sampling edge

LCX14

400ns or more

CAUTION

Applying a voltage outside 0 to 5 V range to the “TRIG OUT/EXT CLK IN” terminal can damage the input section.

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4.8 Selecting the Time Base

Precautions when sampling with an external clock signal

• Clock signal must be set to continuous signal. You cannot use a burst signal.

• You cannot set the acquisition mode to envelope mode or box average.

• You cannot display the waveform in roll mode.

• There is no function to divide the frequency of the clock signal.

• Since you cannot change the time axis setting, change the record length setting or zoom in/

• The time measured by using cursor measurements and automatic measurement of waveform

• You cannot select realtime print or realtime record to the internal hard disk.

• The following limitations exist for the trigger function.

Operating Procedure

1. Press the

2. Press the “Clock” soft key and then select “Int” or “Ext.”

out on the time axis to change the display range of the time axis.

parameters are in terms of clock counts of the clock signal. The unit is not displayed.

Trigger delay setting becomes invalid. Holdoff setting becomes invalid. B>Time, B<Time, and B Time Out triggers Setting becomes invalid.

ACQ

key.

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Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON/OFF

Function

The channels CH1 to CH8 can be displayed simultaneously. For channels which have their display is turned ON, the LED above the key lights. However, channels which do not have input modules installed cannot be turned ON.

Note

• The screen can be split into up to eight display areas. (Refer to page 8-1.) A scaling value and waveform label name for each display area (refer to page 8-8, 8-9) can also be displayed.

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

Operating Procedure

1. Press one of the

bit extended logic input (/N1), press the or the

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

The display can be turned ON/OFF directly by pressing

Note

The ON/OFF of the display of each channel can be set using the jog shuttle and the power is turned ON; immediately after performing initialization or auto set-up; when the saved data is loaded; or at the screen displayed after continuously pressing the Refer to page 5-15.

CH2

key (LOGIC2).

CH1

CH16

keys to select the desired channel. To select the optional 32-

SHIFT

key and then either the

CH1

ESC

CH1

key (LOGIC1)

CH16

several times.

SELECT

key (all channel setting menu).

Vertical and Horizontal Axes

key when the

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5.2 Setting T/div

Function

The T/div setting is made by setting the time per division on the screen grid.

T/div setting range

Different types of modules can be installed simultaneously in this instrument. The available T/ div range is as follows. 500 ns/div to 100 ks/div (1-2-5 steps) However, some T/div settings can not be selected depending on the record length. For details, refer to Appendix 1 “Relationship between the Time Axis Setting, Sample Rate and Record Length.”

Maximum sample rate

The maximum sample rate varies according to the input module as follows.

Input module Maximum sample rate

High speed isolation module 10 MS/s High speed module 10 MS/s High resolution high voltage isolation module 100 kS/s High resolution isolation module 100 kS/s Temperature module *1 Logic input module *2

*1 Data update rate is approximately 135 Hz. *2 The response time varies according to the logic probe being used. For details, refer to Section 15.23.

≡ For a description of this function, refer to page 1-2. ≡

T/div display

If the T/DIV knob is turned while the waveform acquisition is stopped, the top section displays the T/div corresponding to the display waveform and the bottom section displays the changed T/ div. The changed T/div value becomes valid on the next start.

The display waveform T/div

The changed T/div

T/div and roll mode

The display switches to roll mode if the trigger mode is auto or auto-level; T/DIV is between 100 ms/div and 200 ks/div; and the sample rate is 100 kS/s or less. However, when using “Log Start” or “Single Start” under the ACQ menu, the display is in roll mode even when the trigger mode is set to normal or time.

Notes on the roll mode display

• Up to the first three points of data become undefined on the waveform display immediately after the start of the roll mode. The number of points that become undefined depends on the sample rate. Make sure that the measurement range does not include these three points such as in the automatic measurement of waveform parameters.

• The operations when selecting “Single Start”/“Log Start” from the ACQ menu are as follows. By pressing the “Single Start” soft key, the trigger mode is set to normal mode. After acquiring the specified record length of data following a trigger activation, the displayed waveform stops. By pressing the “Log Start” soft key, the trigger mode is disabled. After acquiring the specified record length of data, the displayed waveform stops.

• Changing the V/div, T/div, or trigger setting resets the roll mode display.

• Computation, cursor measurements, and automatic measurement of waveform parameters can not be made.

• X-Y waveform displays the data after performing P-P compression. X-Y waveform is displayed in the range from –5 div to 5 div, not in the range specified by “Start Point/End Point” (see page 8-10). However, if you stop the waveform acquisition, the waveform is displayed in the range specified by “Start Point/End Point.”

• Averaging and sequential store are not possible.

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Display example

When sampling a 10 kHz input signal at 5 MS/s

5.2 Setting T/div

CH3 : High-resolution, High-voltage, Isolation module

CH7 : High-speed module

Operating Procedure

Turn the

TIME/DIV

knob to set the desired T/div.

Vertical and Horizontal Axes

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5.3 Setting V/div

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/High-

Resolution, Isolation Modules) ≡ For a description of this function, refer to page 1-3. ≡

Function

The V/div (voltage axis 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. Setting is in 1-2-5 steps (1V/div → 2V/div → 5V/div).

V/div setting range

The setting range varies depending on the input module as shown below.

Input module Setting range

High-Speed Isolation Module 5mV/div to 20V/div High-Speed Module 5mV/div to 20V/div High-Resolution, High-Voltage, Isolation Module 50mV/div to 200V/div High-Resolution, Isolation Module 5mV/div to 20V/div

* The above values are given for a probe attenuation of 1:1. They will be 10 times the value shown when it is

10:1, 100 times the value shown when it is 100:1, and 1000 times the value shown when it is 1000:1.

V/div display

If the V/DIV knob is turned while the waveform acquisition is stopped, the top section displays the V/div corresponding to the displayed waveform and the bottom section displays the changed V/div. The changed V/div value becomes valid on the next start.

Operating Procedure

1. Press one of the keys

bit extended logic input (/N1), press the or the

2. Turn the

Note

• Rotating the

• Certain screens allow you to use the jog or shuttle dial and

• The upper section of the V/div display (upper left of the screen) when zooming in the vertical direction

The displayed waveform (CH1) V/div

The changed V/div

CH1

CH16

to select the desired channel. To select the optional 32-

SHIFT

key and then either the

CH2

key (LOGIC2).

V/DIV

knob to set the desired value.

V/DIV

knob while acquisition is suspended has no affect on cursor and automatic

measurements, which continue to reflect the original V/div scale until acquisition is resumed.

div setting. This feature is available (a) immediately after power ON, (b) immediately after initialization or automatic setup, and (c) when you are reloading saved data. You can also produce one of these screens by pressing the

with “V Zoom,” is the V/div corresponding to the displayed waveform (V/div that is zoomed with “V Zoom”). The lower section is the value being set with the V/div knob (V/div before zooming with “V Zoom”).

ESC

key one or more times. Refer to page 5-14.

SELECT

key to select the channel(s) for V/

CH1

key (LOGIC1)

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5.4 Setting the Vertical Position of a Waveform

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation/Logic Input Modules)

≡ For a description of this function, refer to page 1-4. ≡

Function

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

Waveforms that can not be moved

Snap shot waveforms

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.

500mV/div,Offset : -1V,Position:0div

Ground level mark

Vertical position mark

Vertical and Horizontal Axes

Note

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

• If the display waveform goes out of the waveform display frame from moving the vertical position

Operating Procedure

1. Press one of the keys

bit extended logic input (/N1), press the or the

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

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

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

overflow data.

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.

CH1

CH16

to select the desired channel. To select the optional 32-

SHIFT

CH2

key (LOGIC2).

key and then either the

CH1

key (LOGIC1)

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5.5 Selecting Input Coupling

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/High-

Resolution, Isolation Modules) ≡ For a description of this function, refer to page 1-4. ≡

Function

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. 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

* The value varies for each input module. For details, refer to Section 15.16 to 15.19.

• When the input coupling is set to “AC” and the frequency of the input signal is less

• Do not apply voltages exceeding the maximum input voltage or the maximum

Operating Procedure

1. Press one of the

2. Press the “Coupling” soft key to select “DC”, “AC” or “GND”.

0 dB

-3 dB

Lower frequency

-3 dB point when AC coupling*

-3 dB point* Input frequency

0 dB

-3 dB

-3 dB point*

Input frequency

CAUTION

than 1 Hz, the input terminal of the instrument does not attenuate the signal to 1/10 even if a probe with attenuation ratio of 10:1 and input resistance of 10 MΩ is used. Therefore, make sure not to input a voltage that has a signal component less than 1 Hz that exceeds the maximum input voltage of each module.

allowable common mode voltage of each of the input modules. It may damage the input section.

CH1

CH16

keys to select the desired channel.

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5.6 Selecting Probe Attenuation

≡ For a description of this function, refer to page 1-4. ≡

For High-Speed Isolation/High-Speed Module, set the attenuation according to the probe being used. For High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Module, set the attenuation to 1:1.

Function

Probe attenuation for each channel can be selected from the following. 1 : 1, 10 : 1, 100 : 1, 1000 : 1

Note

If an incorrect attenuation has been selected, V/div will also be incorrect. If you set the attenuation to 1:1 when using a 10:1 probe, for example, the displayed value for automatically measured amplitude will be 1/ 10 the true value.

Operating Procedure

1. Press one of the keys

2. Keep pressing the “Probe” soft key until the desired attenuation is selected.

CH1

CH16

to select the desired channel.

Vertical and Horizontal Axes

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5.7 Setting the Bandwidth

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/High-

Resolution, Isolation/Temperature/Strain Modules)

Function

Bandwidth

The following frequency bandwidth limit can be set on each input module. Each channel is set individually. No bandwidth limit is set if “FULL” is selected.

High-Speed Isolation Module and High-Speed Module (Low pass filter)

Full, 500 kHz, 50 kHz, 5 kHz, 500 Hz

High-Speed Module (Low pass filter)

Full, 5 MHz, 500 kHz

High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Module (Low pass filter, anti-aliasing filter)

Full, Auto, 4 kHz, 400 Hz, 40 Hz If a limit other than Full or Auto is selected, low pass filter is selected for the specified frequency. Selecting Auto automatically combines the anti-aliasing filter and low pass filter according to the sample rate as shown below and limits the frequency bandwidth.

Sample rate Anti-aliasing filter Low pass filter

100 kS/s 40 kHz OFF 50 kS/s 20 kHz OFF 20 kS/s 8 kHz OFF 10 kS/s 4 kHz 4 kHz 5 kS/s 2 kHz 4 kHz 2 kS/s 800 Hz 4 kHz 1 kS/s 400 Hz 400 Hz 500 S/s 200 Hz 400 Hz 200 S/s 80 Hz 400 Hz 100 S/s 40 Hz 40 Hz 50 S/s 20 Hz 40 Hz 20 to 5 S/s 20 Hz 40 Hz 2 S/s or below 20 Hz 40 Hz

* Cut-off characteristic : -72 dB/1.5 fc

≡ For a description of this function, refer to page 1-5. ≡

Temperature Module

Full, 2 Hz, 8 Hz 2 Hz is a line filter (for removing 50/60 Hz noise).

Strain Module (Low-pass filter)

Full, 1 kHz, 100 Hz, 10 Hz

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Operating Procedure

1. Press one of the keys

2. Press the “Bandwidth” soft key to change the band width setting. High-Resolution Isolation Module

3. Repeat the above steps as necessary to set the value on other channels.

Note

You can set the bandwidth separately for each channel. Repeat steps 1 and 2 as necessary to make the settings.

CH1

CH16

to select the desired channel.

5.7 Setting the Bandwidth

Vertical and Horizontal Axes

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5.8 Zooming in Vertical Direction

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation/Logic Input Modules)

≡ For a description of this function, refer to page 1-5. ≡

Function

The displayed waveform can be enlarged/reduced in vertical direction. It is useful when you wish to change the vertical axis setting after displaying waveforms using Single Start/Log Start (refer to page 4-6).

Selecting the trace to zoom

Select one waveform from CH1 to CH16. However, if the selected waveform display is OFF, it cannot be zoomed.

Zoom factor

The following zoom factors are available.

×0.1, ×0.2, ×0.25, ×0.4, ×0.5, ×0.75, ×0.8, ×1, ×1.14, ×1.5, ×1.6, ×1.77, ×2, ×2.28, ×2.66, ×3.2, ×4, ×5, ×8, ×10, ×12.5, ×16, ×20, ×25, ×40, ×50 and ×100.

Zoom position

Zooms with the center at the vertical position.

When “V Zoom” is switched from “x1” to “x2”

Operating Procedure

1. Press one of the keys

2. Press the “V Zoom/Offset” soft key to set jog shuttle action to “V Zoom.”

3. Turn the jog shuttle to set the desired zoom factor.

Note

• If the item being controlled by the jog shuttle is “V Zoom,” pressing the

• The upper section of the V/div display (upper left of the screen) when zooming in the vertical direction

1div=1V 1div=500mV

CH1

CH16

to select the channel to zoom and turn the display ON.

→

RESET

factor to x1.

key will set the zoom

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5.9 Setting the Offset Voltage

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation Modules) ≡ For a description of this function, refer to page 1-5. ≡

Function

The offset voltage can be set regardless of the input coupling setting.

Offset voltage setting range

The setting range varies depending on the input module as shown below.

For High-Speed Isolation Module (701855) and High-Speed Module (701856)

Sensitivity Range (Probe=1:1) Offset Voltage Setting Range

5 mV/div to 50 mV/div -0.5 V to 0.5 V 100 mV/div to 500 mV/div -5 V to 5 V 1 V/div to 5 V/div -50 V to 50 V 10 V/div to 20 V/div -250 V to 250 V*

The setting resolution is 0.01 div. If the voltage scale is 5 mV/div, for example, the setting resolution will

0.05 mV. * Do not apply an input exceeding the maximum input voltage.

For High-Resolution, High-Voltage, Isolation/High-Resolution, Isolation Module

• The waveform can be set in the range between ± 4 div.

• The setting resolution is 0.01 div.

Canceling the offset voltage

If the item being controlled by the jog shuttle is “Offset,” pressing the offset voltage to 0 V.

RESET

Vertical and Horizontal Axes

key sets the

Points for attention

• The offset voltage is effective even when the acquisition is stopped.

• The offset value does not affect cursor measurements, automatic measurements, or math computations.

• If you change the probe attenuation, the offset changes proportionally to reflect the new attenuation rate.

• Changing the voltage sensitivity does usually not affect the offset value. Only if the change would cause the offset to go out of range, the offset moves to the nearest range limit. If you then return to the original sensitivity, the offset returns to its original setting as well (provided that you have not explicitly changed the value in the meantime).

Operating Procedure

Setting the offset voltage

1. Press one of the keys

2. Press the “V Zoom/Offset” soft key to set jog shuttle action to “Offset.”

3. Turn the jog shuttle to set the desired offset voltage.

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

Canceling the offset voltage (setting it to 0 V)

You can return the offset to 0V by pressing the

CH1

CH16

to select the desired channel.

RESET

key.

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5.10 Using the Linear Scaling Function

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/High-

Resolution, Isolation Modules, For strain modules, see section 5.16.)

≡ For a description of this function, refer to page 1-19. ≡

Function

This function lets you apply linear scaling to the measurement values. If you set this feature ON, the screen displays the scaled results rather than the original measurements. The scaling relationship is

Y = AX + B where X is the measurement value and Y is the scaled value. Note that you can select the dimensional unit for the scaled display.

Scaling coefficient (A) and offset (B)

Range for A, B : –1.0000E+30 to +1.0000E+30 Default : A +1.0000E+00, B +0.0000E+00

Dimensional unit

Unit identifier (alphanumeric string) of up to four characters.

Displaying Upper and Lower Limits

Depending on the values of A and B for the linear scaling, the upper and lower limits of the vertical axis for displaying the waveform may not be well-rounded values. If you set “Linear Scale Rounding” to ON, the waveform is displayed so that 1 div of the vertical axis is adjusted to well-rounded values of 1-2-5 steps. Example If 5.0V/div, A=1.2345E+00, and B=5.4321E+00, the upper and lower limits of the waveform display are as follows. “Linear Scale Rounding” is OFF : 3.0122E+01/-1.9258E+01 (0.61725E+00/div) “Linear Scale Rounding” is ON : 5.000E+01/-3.000E+01 (1.000E+01/div)

Operating Procedure

1. Press a channel key (

2. Press the “Next 1/2” soft key.

3. Press the “Linear Scaling” soft key to select ON.

4. Press the “Ax+B:A” soft key, and then set the A value using the jog shuttle.

You can use the arrow keys to move to different columns within the value.

5. Press the “Ax+B:B” soft key, and then set the B value.

6. If necessary, press the “Units” soft key and enter the unit string at the keyboard.

CH1

→

CH16

) to select the channel you want to set.

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5.10 Using the Linear Scaling Function

Enabling/Disabling rounding of the upper and lower limits of the waveform display

1. Press the

MISC

key.

2. Press the “Next” soft key to display the “Next2/2” menu. Then, press the “Others” soft

key.

3. Press the “Linear Scale Rounding” soft key and select “ON” or “OFF.”

When A=1.2345E+00, B=5.4321E+00

Linear Scale Rounding:OFF

Linear Scale Rounding:ON

→

Note

• Linear scaling is not available for the following waveforms. Snapshot waveforms Accumulated waveforms (except for newest waveform)

• You can set linear scaling separately for each channel.

• The A and B values remain in memory after you switch the linear scaling function OFF, and are restored if you switch the function back on.

• Mathematical computations operate with respect to the scaling results.

Vertical and Horizontal Axes

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5.11 Inverting a Waveform

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation Modules) ≡ For a description of this function, refer to page 1-5. ≡

Function

Relevant channels

The input signals to channels CH1 to CH16 can be inverted independently of one another. Inversion is performed about the vertical position.

Points for attention

• If you change the invert display setting while the waveform acquisition is stopped, the display does not change. The waveform will be displayed inverted the next time you start the acquisition.

• Cursor measurements, automatic measurement of waveform parameters, and computation functions do not give correct results if the waveform is inverted and the offset is non-zero.

• You can not invert the waveform while realtime printing or realtime recording. The waveform is inverted when you stop the waveform acquisition.

Operating Procedure

1. Press one of the keys

2. Press the “Next 1/2” soft key.

3. Press the “Invert” soft key until “ON” is selected.

CH1

CH16

to select the desired channel.

→

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5.12 Setting the ON/OFF of Channels and the V/div with the All Channel Setting Menu

Function

The ON/OFF of each channel and the V/div setting are explained in pages 5-1 and 5-4 respectively. This section explains the procedure in displaying information on all the channels simultaneously and setting the ON/OFF and V/div settings for the individual channels. Note that, channels that have temperature modules, logic input modules, or strain modules installed can not set the V/div settings.

Display of the all channel setting menu

The all channel setting menu is displayed after carrying out the following operating procedure.

• When the

• Just after initialization has been completed

• Just after auto set-up has been completed

• When data is loaded from the floppy disk/internal hard disk/external SCSI device

Operating Procedure

Selecting the channels

1. In any of the above cases, the all channel setting menu appears as shown below.

2. Turn the jog shuttle to select the desired channels.

Proceed to step 3 or 4 depending on which settings you want to make.

Turning the channel ON/OFF

3. Press the

ESC

key is pressed repeatedly

SELECT

key to select “ON” or “OFF”.

Vertical and Horizontal Axes

Setting the V/div

4. Turn the

5. Repeat steps 2 to 4 until you have made all the settings you want.

V/DIV

knob to set the desired V/div value.

Note

Channels which do not have input modules installed are not displayed on the all channel setting menu.

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5.13 Setting the Temperature Measurement

(For Temperature Module)

≡ For a description of this function, refer to page 1-6. ≡

Function

Types of thermocouples

Select the appropriate type that matches the thermocouple being used. The following types of thermocouples are available. When the input terminal is left open, the displayed value goes below the lower limit of the measurement range.

Type Measurement range

K -200 to 1300°C E -200 to 800°C J -200 to 1100°C T -200 to 400°C L -200 to 900°C U -200 to 400°C N0 to 1300°C R0 to 1700°C S0 to 1700°C B0 to 1800°C W0 to 2300°C A (KPvsAu7Fe) 0 to 300K

Temperature unit

Select the temperature unit from °C, °F, and K. The default setting is °C.

Display range

To display the measured waveform, the upper and lower limits need to be set according to the input.

• Available range

-3000 to 3000°C (The setting resolution is 0.1°C.)

-2726.8 to 3273.2K (The setting resolution is 0.1K.)

-5368.0 to 5432.0°F (The setting resolution is 0.1°F.)

ON/OFF of RJC

This instrument normally performs reference junction compensation with the built-in RJC circuit when measuring temperature with the thermocouple. When checking the temperature measurement value, or when using an external reference junction (0°C), the internal reference junction compensation needs to be disabled. This instrument allows you to select whether to use or not to use the internal reference junction compensation. Normally, this is set to ON.

Note

With the RJC turned off, if a voltage corresponding to a certain maximum temperature is applied at the input and the measured temperature is off as compared with the maximum temperature, the instrument may be damaged. Please contact your nearest YOKOGAWA dealer listed on the back cover of this manual.

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Operating Procedure

1. Press one of the keys (channel key which has the Temperature Module installed)

CH16

Select the type of thermocouple

2. Press the “Type” soft key to select the desired type.

Set the display range

3. Press the “Upper Scale” soft key to set jog shuttle action to “Upper Scale.”

4. Turn the jog shuttle to set the upper limit.

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

5. In the similar way, set the lower limit with “Lower Scale.”

Select the temperature unit

6. Press the “Unit” soft key to select the desired unit.

ON/OFF of RJC

7. Press the “RJC” soft key to select “ON” or “OFF.”

to select the channel.

5.13 Setting the Temperature Measurement

CH1

Vertical and Horizontal Axes

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5.14 Setting the Logic Probe

(For Logic Input Module and /N1 32-bit extended logic input)

Function

ON/OFF of bit display:Bit Display

Allows you to select whether or not to display the waveform for each bit.

Mapping the logic waveform: Bit Mapping

OFF : The spaces for the bit waveforms that are turned OFF are maintained. ON : The spaces for the bit waveforms that are turned OFF are not maintained. Only the bit

waveforms that are turned ON are displayed in order from the top.

OFF(when Bit7=OFF on POD A)

A1 A2 A3 A4 A5 A6

Operating Procedure

1. Press one of the keys (channel key which has the logic input module installed)

CH16

the

2. Press the “Bit Display” soft key to display the display ON/OFF setting screen.

3. Move the cursor to the bit you wish to turn ON with the jog shuttle.

4. Press the

Selecting “ALL ON” turns all items ON at once. Selecting “ALL OFF” turns all items OFF at once.

5. Repeat steps 3 and 4 as necessary.

ON(when Bit7=OFF on POD A)

A1 A2 A3 A4 A5 A6 A8

CH1

to select the channel. To select the optional 32-bit extended logic input (/N1), press

SHIFT

key and then either the

SELECT

key to turn it ON.

CH1

key (LOGIC1) or the

CH2

key (LOGIC2).

Mapping the logic waveform

6. Press the “Bit Mapping” soft key to select “ON” or “OFF.”

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5.15 Setting the Strain Measurement

(For Strain Module)

Function

Selecting the measurement range : Range

Select the range according to the magnitude of the strain to be measured. 20000uSTR, 10000uSTR, 5000uSTR, 2000uSTR, 1000uSTR uSTR stands for 10 For the measurement range, see section 15.24.

Selecting the display range : Upper Scale/Lower Scale

To make the viewing of the measured waveform easier, you can change the upper and lower limits of the display range according to the input. Setting range : –30000 to +30000uSTR Make sure to set the upper scale value to be larger than the lower scale value.

-6

strain.

Upper Scale

Measurement range

Display range

Vertical and Horizontal Axes

Lower Scale

Selecting the bridge voltage : Excitation

You can select the voltage to apply to the bridge head.

•2 V : When the resistance of the bridge head (bridge resistance) is 120 Ω or more.

•5 V : When the bridge resistance is 350 Ω or more You cannot change the bridge voltage during a waveform acquisition.

Setting the gauge factor : Gauge Factor

You can set the gauge factor of the strain gauge. Setting range : 1.90 to 2.20 (in 0.01 steps) The gauge factor is a constant that is specific to the strain gauge, and is normally indicated in the manual for the strain gauge. If the gauge factor is outside the range specified above, calculate the measurement value according to section 5.16 “Using the Linear Scaling Function for the Strain.” You cannot change the gauge factor during a waveform acquisition.

Setting the bandwidth : Bandwidth

See section 5.7 “Setting the Bandwidth.”

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5.15 Setting the Strain Measurement

Executing balancing : Balance

The unbalanced portion of the bridge resistance is automatically corrected. The balancing takes a few seconds. Balance range : ±10000uSTR

Precautions when making strain measurements

• If there is no strain gauge bridge (bridge head) or strain gauge transducer connected to the channel you wish to balance, calibration fails.

• Select a bridge voltage of 5 V when the bridge resistance is 350 Ω or more. Applying a bridge voltage of 5 V when the bridge resistance is less than 350 Ω results in incorrect measurements.

• When using the strain gauge transducer, make sure to set the bridge voltage within the recommended voltage range of the transducer.-

• If any one of the specified channels fails to balance, then an error message and information about the channel that failed are displayed.

• If the power is turned ON, a new strain gauge is connected, or the bridge voltage or the gauge factor is changed, you need to balance again.

Operating Procudure

1. Press one of the keys (channel key that has the strain module installed),

select the channel.

CH1

CH16

, to

Select the measurement range

2. Press the “Range” soft key and select one from “20000uSTR” to “1000uSTR.”

Set the display range

3. Press the “Upper Scale/Lower Scale” soft key and set the jog shuttle action to “Upper

Scale.”

4. Turn the jog shuttle to set the upper limit.

You can change the setting a digit using the arrow keys.

5. Similarly, set the lower limit with “Lower Scale.”

Select the bridge voltage

6. Press the “Excitation/Gauge Factor” soft key to select “2V” or “5V.”

Set the gauge factor

7. Continuing from step 6, turn the jog shuttle to set the gauge factor.

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5.15 Setting the Strain Measurement

Execute balancing

8. Press the “Balance” soft key to display the channel selection menu.

9. Turn the jog shuttle to move the cursor to the channel that you wish to balance.

10. Press the

11. Repeat steps 9 and 10 for all of the channels you wish to balance.

12. Move the cursor to “Balance” using the jog shuttle.

13. Press the

SELECT

key to turn it ON.

key to execute the balancing.

Vertical and Horizontal Axes

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5.16 Using the Linear Scaling Function for the Strain

(For Strain Module)

Function

Linear Scaling Selecting the linear scaling method : Linear Scaling

• Select the linear scaling method from the following.

• OFF

No linear scaling is performed.

• Ax+B

The setting range and the initial setting of the scaling coefficient A and offset value B are the same as described in section 5.10 “Using the Linear Scaling Function.”

• P1–P2

Arbitrary scale values (P1:Y, P2:Y) are set against two arbitrary measurement values (P1:X, P2:X). The scale converting equation (y=ax+b) is determined from these four values.

• Measurement value (P1:X, P2:X) range : Same as the measurement range (see section 15.22).

• Scale value (P1:Y, P2:Y) range : –1.0000E+30 to +1.0000E+30

• Initial setting of scale values : P1:X 0.0uSTR, P1:Y +0.0000E+00

: P2:X 1.0uSTR, P2:Y +1.0000E+00

Scale value

P2:Y

P1:Y

• Reading in the measurement values : Get Measure When “P1–P2” is selected for the linear scaling method, you can read in the waveform data into P1:X and P2:X while the waveform acquisition is started.

• During roll mode display

The data when the “Get Measure” soft key is pressed are read in.

• During update mode (not roll mode)

The last data of the displayed waveform when the “Get Measure” soft key is pressed are read in.

Setting the unit : Unit

The unit setting is the same as described in section 5.10 “Using the Linear Scaling Function.”

P1:X

Measurement range

y = ax + b

P2:X

Measurement value

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Operating Procedure

1. Press one of the keys (channel key that has the strain module installed),

select the channel.

2. Press the “Next1/2” soft key.

Select the linear scaling

3. Press the “Linear Scaling” soft key to select one from “OFF” to “P1–P2.” If you select

OFF, the operating procedure ends here.

When “Ax+B” is selected

4. Press the “Ax+B:A” soft key and set the value of A with the jog shuttle.

You can change the setting a digit using the arrow keys.

5. Press the “Ax+B:B” soft key and set the value of B in a similar manner.

5.16 Using the Linear Scaling Function for the Strain

CH1

CH16

, to

Vertical and Horizontal Axes

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5.16 Using the Linear Scaling Function for the Strain

When “P1–P2” is selected

4. Press the “P1:X/P1:Y” soft key and set the jog shuttle action to “P1:X.” “P1:X” is displayed in the “Get Measure” soft key.

5. Press the “Get Measure” soft key to read in the measured value into P1:X or set the value

with the jog shuttle. You can change the setting a digit using the arrow keys.

6. Press the “P1:X/P1:Y” soft key again and set the jog shuttle action to “P1:Y.”

7. Set the scale value P1:Y with the jog shuttle.

You can change the setting a digit using the arrow keys.

8. Press the “P2:X/P2:Y” soft key and set the jog shuttle action to “P2:X.” “P2:X” is displayed in the “Get Measure" soft key.

9. Press the “Get Measure” soft key to read in the measured value into P2:X or set the value with the jog shuttle. You can change the setting a digit using the arrow keys.

10. Press the “P2:X/P2:Y” soft key again and set the jog shuttle action to “P2:Y.”

11. Set the scale value P2:Y with the jog shuttle.

You can change the setting a digit using the arrow keys.

Set the unit

If necessary, press the “Units” soft key to display the keyboard, then input the name of the unit. For the procedures on entering character strings, see section 4.1 “Entering Values and Character Strings.”

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5.17 Displaying the Setup Menu over the Entire Screen (Full Screen Setup)

Function

You can display the setup menu of all channels over the entire screen and set the parameters. The setting parameters are the same as those of the channel key.

Operating Procedure

1. Press a

2. Press the “V/div, Range, Offset etc” or “Lin-scale, Unit Label etc” soft key to

3. Turn the jog shuttle, press the “←” or “→” soft key, or press the cursor key to move the

4. Press the

5. Use the jog shuttle,

CHANNEL

display the setup menu.

cursor to the parameter you wish to change.

SELECT

key from CH1 to CH16.

key to display the setup menu for the selected parameter.

SELECT

key, and arrow keys to set the parameter.

Vertical and Horizontal Axes

Copying the setup data to modules of same type

2. Turn the jog shuttle and move the cursor to the parameter of the copy source channel.

3. Press the “Copy to Same Module” soft key to copy the setting to the channels with the

same type of module.

Turning Channels ON/OFF

2. Turn the jog shuttle and move the cursor over the rectangular section on the right of the

channel number.

3. Press the

rectangle, you can turn all channels ON/OFF at once.

SELECT

key and set ON/OFF. is ON. By moving the cursor over the “All”

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Chapter 6 Triggering

6.1 Setting the Trigger Mode

Function

Auto mode

Auto mode is the one which is used normally. The display is updated in the following two cases.

• When the trigger conditions are met: Updated when the trigger conditions are met

• When 50 ms elapses without trigger conditions being met: Updated automatically In auto mode, the waveform can still be observed even if no trigger is activated, hence it is useful when you want to check the waveform and ground level even when no trigger is detected. However, if the period of the trigger signal is 50 ms or longer, the above two conditions will be satisfied alternately. In this case, use normal mode.

Auto level mode

• If a trigger is activated before timeout, it displays the waveform in the same way as in auto mode.

• If the trigger is not activated within the timeout time, then the center value of the amplitude of the trigger source is detected, and the trigger level is changed to that value. The trigger is activated using the new value and the displayed waveform is updated.

• This mode can only be selected for simple triggers.

≡ For a description of this function, refer to page 1-10. ≡

Triggering

Normal mode

The display is updated only when the trigger conditions are met. The display will not be updated if no trigger occurs. Therefore, to check the waveform or ground level when no trigger is detected, you must use auto mode.

Timer Trigger

The trigger is activated at the specified interval from the specified time.

Note

• Pressing the “Single Start” or “Log Start” soft key acquires the waveform once and displays it.

• The trigger mode setting applies to both simple and enhanced triggers.

• In the normal mode when the maximum acquisition count is set to one (see section Appendix 2), if you

Operating Procedure

1. Press the

2. Press the “Mode” soft key to select “Auto” or “Normal.”

Refer to page 4-6.

press the stop key when the waveform acquisition is in the “Waiting for trigger” state, then the displayed waveform is updated with the waveform when the key was pressed.

SIMPLE

Simple trigger mode

key or the

ENHANCED

key.

Enhanced trigger mode

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6.2 Selecting a Channel for Setting Trigger

Simple trigger mode

Enhanced trigger mode

Hysteresis and Trigger Level

Function

Selects the channel (trigger source) for setting parameters such as trigger hysteresis and trigger level. If you use a simple trigger, only the selected channel serves as the trigger source. If you use an enhanced trigger, the trigger source is generated using all channels selected within the “Set Pattern” function. The following traces are available for trigger source.

• CH1 to CH8 (CH2, CH4, CH6)

• LOGIC1 and LOGIC2 (32-bit extended logic input)

• EXT (the TRIG IN terminal on the left side)

• LINE (commercial power supply signal)

Note

The items to set are different when CH1 to CH16 is selected and when LOGIC1, LOGIC2, EXT, or LINE is selected.

• CH1 to CH16 : hysteresis (Section 6.3), trigger level (Section 6.4), slope (simple (for voltage/temperature module) trigger only, Section 6.8)

• CH1 to CH16 : slope (simple trigger only, Section 6.8), Logic Bit No. (simple (for logic input module) trigger only, Section 6.8), Set Pattern (enhanced trigger only,

• LOGIC1, LOGIC2 : slope (simple trigger only, Section 6.8), Logic Bit No. (simple

• EXT : trigger level (Section 6.4), slope (simple trigger only, Section 6.8)

• LINE : There are no trigger hysterisis/trigger level settings

Section 6.9 to 6.14)

trigger only, Section 6.8)

Operating Procedure

1. Press the

2. Press the “ Source” soft key to display the trigger source menu.

3. Select the desired trigger source from channels “ CH1” to “ CH16,” “ LOGIC1,*1, *2”

“ LOGIC2,*1, *2” “ EXT*” and “ LINE*” using the jog shuttle. Channels which do not have input modules installed are not displayed on the menu. *1 You can select this channel only when the optional 32-bit extended logic input (/N1) is

*2 Available only on simple trigger.

SIMPLE

installed.

key or the

ENHANCED

key.

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6.3 Setting Trigger Hysteresis for Channels 1 to 16

(For High-Speed Isolation/High-Speed/High-Resolution, High-Voltage, Isolation/HighResolution, Isolation/Temperature/Strain Modules)

≡ For a description of this function, refer to page 1-10. ≡

Function

Setting the trigger hysteresis

Allow the trigger level to have a width, so that the trigger does not get activated due to small fluctuations in the signal. Select the trigger hysteresis from the following three choices.

• For voltage modules

: Hysteresis of about ± 0.1 div centered on the trigger level. : Hysteresis of about ± 0.5 div centered on the trigger level. : Hysteresis of about ± 1 div centered on the trigger level.

• For temperature module

: Approx. ± (0.5 × the setting resolution of the trigger level) : Approx. ± (1 × the setting resolution of the trigger level) : Approx. ± (2 × the setting resolution of the trigger level)

* For the setting resolution of the trigger level, see section 6.4.

• For strain modules

: Hysteresis of approx. ± 2.5% of the selected measurement range centered on the trigger

level.

: Hysteresis of approx. ± 12.5% of the selected measurement range centered on the trigger

level.

: Hysteresis of approx. ± 25% of the selected measurement range centered on the trigger

level.

* For the measurement range, see section 5.15.

A trigger is activated at this point if

"Rise" ( ) is selected.

Triggering

Trigger level

Operating Procedure

Setting the trigger hysteresis

1. Press the

2. Press the “ Hysteresis” soft key to select “

SIMPLE

Simple trigger mode

key or the

ENHANCED

key.

Hysteresis width

”, “ ” or “ .”

Enhanced trigger mode

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Note

The trigger hysteresis applies to both the simple and enhanced trigger.

6-3

YOKOGAWA DL716 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Checking the Contents of the Package

Safety Precautions

How to Use this Manual

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 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 Starting Observation and Measurement of Waveforms

3.1 Precautions During Use

3.2 Installing

3.3 Connecting the Power Cord

3.4 Setting the Date and Time

3.5 Installing the Input Module

3.6 Connecting a Probe

3.7 Connecting a Input Cable

3.8 Connecting a Thermocouple

3.9 Connecting a Logic Probe

3.10 Compensating the Probe (Phase Correction)

3.11 Connecting the Bridge Head

Chapter 4 Common Operations

4.1 Entering Values and Character Strings

4.2 Initializing Settings

4.3 The Auto Set-up Function

4.4 Starting and Stopping Acquisition

4.5 The Snapshot and Clear Trace Functions

4.6 Calibration

4.7 Using the Help Function

4.8 Selecting the Time Base

Chapter 5 Vertical and Horizontal Axes

5.1 Turning Channels ON/OFF

5.2 Setting T/div

5.3 Setting V/div

5.4 Setting the Vertical Position of a Waveform

5.5 Selecting Input Coupling

5.6 Selecting Probe Attenuation

5.7 Setting the Bandwidth

5.8 Zooming in Vertical Direction

5.9 Setting the Offset Voltage

5.10 Using the Linear Scaling Function

5.11 Inverting a Waveform

5.12 Setting the ON/OFF of Channels and the V/div with the All Channel Setting Menu

5.13 Setting the Temperature Measurement

5.14 Setting the Logic Probe

5.15 Setting the Strain Measurement

5.16 Using the Linear Scaling Function for the Strain

5.17 Displaying the Setup Menu over the Entire Screen (Full Screen Setup)

Chapter 6 Triggering

6.1 Setting the Trigger Mode

6.3 Setting Trigger Hysteresis for Channels 1 to 16