YOKOGAWA DL7440, DL7400, DL7480 Operation Manual

Download

Page 1

DL7440/DL7480

Digital Oscilloscope

IM 701450-02E

2nd Edition

Page 2

Foreword

Thank you for purchasing the DL7400 (DL7440/DL7480) Digital Oscilloscope. This operation guide is designed to bring first-time users quickly up to speed with the basic operations of the DL7400. There are two other manuals for the DL7400 in addition to this operation guide: the DL7400 User’s Manual (IM701450-01E) that explains all of the functions of the instrument, and the Communications Interface User’s Manual (IM701450-17E) that provides a more in-depth description of the instrument’s communications functions. Please refer to all of these manuals when operating the instrument.

Note

• 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 the 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 as listed on the back cover of this manual.

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

•A warranty card is included in the package. Please read it carefully, and do not lose it as a new one cannot be issued.

• The TCP/IP software or TCP/IP related documentation used for this software was developed or created using BSD Networking Software, Release 1 licensed from the Regents of the University of California at Berkeley.

Trademarks

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

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

• The company and product names used in this manual are not accompanied by the trademark or registered trademark symbols (TM and ®).

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

Revisions

1st Edition: June 2003 2nd Edition: April 2005

IM 701450-02E

Page 3

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

Flow of Operation...................................................................... 3

Names and Functions of Front Panel Controls ......................... 4

Parts of the Screen ................................................................... 7

Basic Key and Jog Shuttle Operation ..................................... 10

Introduction to Main Functions ................................................ 12

Working with the DL7400 ........................................................ 17

•Preparing for an Observation .................................................... 17

•Displaying a Waveform on the Screen...................................... 19

•Changing Waveform Display Conditions................................... 20

•Changing Trigger Settings ........................................................ 23

•Measuring a Waveform ............................................................. 25

• Zooming a Waveform along the Time Axis................................ 26

•Printing and Saving a Waveform............................................... 27

IM 701450-02E

Page 4

Flow of Operation

Preparing for Measurement

Displaying Waveforms on the Screen

Waveform Display Conditions

Calculating, Analyzing, and Searching Waveform

Printing and Saving Waveforms

Flow of Operation

The chart below is provided to give first-time users an easy-to-understand glimpse of the overall flow of the DL7400’s operation. It is not intended to describe the flow of operations exactly as they are presented in this manual. For details about specific items introduced in the pages within, refer to the corresponding chapter or section in the user’s manual as indicated by the arrows (

Preparing for Measurement

Installing the Instrument

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

Connecting the Probe

Displaying Waveforms on the Screen

Initializing the Settings

Performing Auto Setup

Waveform Display Conditions

• Vertical Axis

• Horizontal (Time) Axis

• Triggers

• Waveform Acquisition

• Waveform Display and Information Display

Section 3.2

Section 3.3

Sections 3.4, 3.5

Section 4.4

Section 4.5

Sections 5.1 to 5.10 Sections 5.11, 5.12 Chapter 6 Chapter 7 Chapter 8

Calculating, Analyzing, and Searching Waveform

• Waveform Computation

• Analyzing and Searching Waveforms

• Searching Waveforms

• GO/NO-GO Determination

Printing and Saving Waveforms

• Printing Screen Images

• Saving Data

IM 701450-02E

Chapter 9 Sections 10.5 to 10.8, 10.11 Sections 10.2 to 10.4, 10.11 Sections 10.9, 10.10

Chapter 11 Chapter 12

Page 5

Names and Functions of Front Panel Controls

Names and Functions of Front Panel Contr ols

This section introduces the names of the various keys and knobs that appear on the front panel, and provides a brief explanation of what functions they control. For details about specific items introduced in the pages within, refer to the corresponding chapter or section in the user's manual as indicated by the arrows (

Vertical Axis

PRESET key Section 5.7

Displays a menu for automatically setting the probe attenuation/current-to-voltage conversion ratio, V/div, offset voltage, trigger level and other items to CMOS or ECL signal values (or other desired values). Presets can also be assigned to all channels at once.

V/DIV knob Section 5.2

Sets the vertical axis sensitivity*. Before turning the knob, you can press a CH1 to CH8(4) key to select the channel and display its menu. If you change the vertical axis sensitivity setting while waveform acquisition is stopped, the new setting takes effect when you start waveform acquisition again.

* In the probe attenuation ratio/current-to-voltage

conversion ratio settings, the voltage axis sensitivity is set when setting the probe attenuation ratio, and the current axis sensitivity is set when setting the currentto-voltage conversion ratio.

CH1 to CH8(4)* keys Sections 5.1 to 5.10

Tu r ns the corresponding channel ON/OFF, and displays a setting menu for the channel’s vertical position, coupling, probe attenuation/current-voltage conversion ratio, offset voltage, bandwidth limit, vertical axis zoom, linear scaling, and waveform labels. Pressing a channel key displays the channel’s menu. If you then turn the V/DIV knob, the V/DIV setting will apply to that channel. The indicator to the left of each channel key illuminates when the channel’s display is ON.

* The DL7440 has four channel keys, and the DL7480

has eight. Hereafter, the expression CH1 to CH8(4) will be used to mean channels 1 through 8 on the DL7480, or channels 1 through 4 on the DL7440.

VERTICAL

PRESET

2 3

V/DIV

4 5 6 7 8

LOGIC

Horizontal Axis

(SHIFT +) ZOOM key Sections 8.4, 10.4, and 10.11

Displays a menu for waveform zoom settings. Pressing the ZOOM key after the SHIFT key displays a setting menu for waveform searching (the Search and Zoom function) and SPI signal analysis/search.

TRIG’D indicator

Illuminates when a trigger has been activated.

HORIZONTAL

ZOOM

TIME/DIV

Triggers

TRIGGER

TRIG D

ACTION

MODE

LOGIC key Section 5.10

Displays a menu for optional logic input settings such as display ON/OFF, display format, threshold level, and waveform level.

TIME/DIV knob Section 5.12

Sets the horizontal axis (time axis) scale. If you change the setting while the waveform acquisition is stopped, the new setting takes effect when you start waveform acquisition again.

(SHIFT +) MODE key Sections 6.1, 6.16, and 7.6

Displays a setting menu for trigger modes and sequential store. If you press the MODE key after the SHIFT key, a setting menu is displayed for the action trigger.

SIMPLE key Sections 6.5 to 6.7

Displays a menu for setting a simple trigger, which is usually the edge trigger. The indicator on the upper left of the SIMPLE key illuminates when the simple trigger is active.

SIMPLE

ENHANCED

DELAY

POSITION

ENHANCED key Sections 6.8 to 6.15

Displays a setting menu for enhanced triggers such as the pattern trigger or other complex triggers. The indicator on the upper right of the ENHANCED key illuminates when the enhanced trigger is active.

(SHIFT +) POSITION key Sections 6.2, 6.3

Displays a setting menu for the trigger position. If you press the POSITION key after the SHIFT key, a setting menu is displayed for the trigger delay.

IM 701450-02E

Page 6

Names and Functions of Front Panel Controls

Common Operations and Acquisition, Display, Computation, Analysis, and Searching

GO/NO-GO key Sections 10.9, 10.10

Displays a setting menu for GO/NO-GO determination.

(SHIFT +) DISPLAY key

Sections 8.1 to 8.3, 8.5, and 8.7 to 8.10

Displays a setting menu for display of waveforms and their information. If you press the DISPLAY key after the SHIFT key, a setting menu appears for X-Y display.

SETUP key Sections 4.4, 4.5, and 12.1

Displays an auto setup menu for automatically assigning values from the input signal to settings, the Initialize menu for restoring factory default settings, and the Store/Recall settings menu.

ESC key

ESC

SETUP FILE

Use this key to close soft key menus and dialog boxes.

MEASURE

X-Y

DISPLAY

CURSOR

(SHIFT +) MATH key Sections 9.1 to 9.9

Displays a setting menu for waveform computations. If you press the MATH key after the SHIFT key, a setting menu is displayed for the phase shift.

SHIFT key

Pressing the SHIFT key causes the SHIFT lamp above the key to illuminate, indicating that the instrument has entered SHIFT mode. When in SHIFT mode, the setting menus labeled in purple above various keys become available.

RESET key

Restores a value changed using the jog shuttle to its original setting.

MISC

RESET

SELECT

SELECT key

Enters a value set using the jog shuttle.

PHASE

MATH

GO/NO GO

MEASURE key

MENU MENU

IMAGE SAVE

Sections 10.6 to 6.8

Displays a menu for automatic

ACQ

measurement of waveform parameters

HISTORY

START/STOP

and statistical processing.

CURSOR key Section 10.5

Displays a setting menu for cursor measurement.

HISTORY key Sections 10.1 to 10.3

Displays a setting menu for displaying and searching waveforms using the History memory function. The key is also used to display and search sequentially stored waveforms.

ACQ k ey Sections 5.11, 7.2 to 7.5

Displays a setting menu for the record length, acquisition mode, interleave mode, sampling rate, and time base during waveform acquisition.

Printing Screen Images and Saving/Loading Data

FILE key Sections 12.2, 12.3, 12.6 to 12.11, 12.13 to 12.16

Displays a menu used when saving data to or loading data from a storage medium (internal storage media, external SCSI devices, or network drives). You can also use this key to display thumbnails of saved screen images.

SETUP FILE

DISPLAY

CURSOR

MEASURE

MENU MENU

(SHIFT +) PRINT key Chapter 11

Used to print screen images on the built-in printer, an external USB printer, or a network printer. If you press the PRINT key after the SHIFT key, a setting menu appears for printing screen images.

IMAGE SAVE

SHIFT

Used in many operations to select setting values and move cursors. The angle through which the shuttle ring is rotated determines the rate at which the setting values increment or decrement.

Arrow keys (< >)

Changes the currently selected digit when entering values with the jog shuttle. Used to change setting values and move cursors.

START/STOP key Section 7.1

Starts/stops waveform acquisition according to the trigger mode. The indicator above the START/STOP key illuminates when waveforms are being acquired.

Jog shuttle

X-Y

GO/NO-GO

MISC

PHASE

MATH

(SHIFT +) IMAGE SAVE key

Sections 12.12, 12.13

SHIFT

Used to save screen images to storage media. If you press the IMAGE SAVE key after the SHIFT key, a setting menu appears for saving screen images to storage media. You can also use this key to display thumbnails of saved screen images.

IM 701450-02E

Page 7

Names and Functions of Front Panel Controls

Calibration, Ethernet Communications, and Other Operations

MISC key Sections 3.7, 4.6, 6.17, 12.4, 16.3, 16.4, and chapters 13 and 15 of the Communications User’s Manual

Displays a menu for settings related to the date/time, calibration, trigger gate, SCSI ID number, Ethernet communications, message language, click sound ON/OFF, USB keyboard language, use of offset voltage measurement/computation results, screen colors/brightness, backlight, self test, and remote control. It can also be used to display settings and the system status (options installed on the unit, firmware version etc.).

X-Y

SETUP FILE

DISPLAY

CURSOR

MEASURE

MENU MENU

IMAGE SAVE

CLEAR TRACE key Section 8.6

Clears snap shot waveforms and accumulated waveforms.

GO/NO-GO

MISC

PHASE

MATH

SHIFT

SNAP SHOT key Section 8.6

Displays a non-updating copy of the currently displayed waveform on the screen in white (default setting).

HELP key Section 4.7

CLEAR TRACESNAPSHOT

Tu r ns the help window, which provides explanations of

HELP

operations, ON and OFF.

IM 701450-02E

Page 8

Parts of the Screen

This section introduces the menus and symbols appearing on the DL7400 screen. For details about specific items introduced in the pages within, refer to the corresponding chapter or section in the user’s manual as indicated by the arrows (

or ).

Common Parts of the Screen

Record length/display position

The green frame shows the length of the displayed waveform relative to the specified record length.

Display during internal processing

The asterisk’s colors indicate the process currently being executed. Green Computing (power spectrum)/accumulating

history waveforms

Ye llow Automatically measuring parameters/

searching

Red Sending mail/executing FTP

commands/executing HTTP commands

Waveform acquisition status

Stopped: Stopped Running: Acquiring waveforms Running Pre: Acquiring pre data Running Post: Acquiring post data Running Waiting for Trigger

Specified record length

Display position

Date/time

Section 3.7

Green frame

Specified record length

Section 7.2

Displayed record length Appendix 1

Trigger position mark Section 6.2

Zoom position Z1

50 k

Normal waveform display position

Sample rate Appendix 1

Acquisition mode Section 7.5

Normal: Normal mode Env: Envelope mode Avg.: Averaging mode BoxAvg: Box averaging mode If you change the horizontal axis scale while waveform acquisition is stopped, instead of the acquisition mode, the new horizontal axis scale and sampling rate is displayed in reverse.

Horizontal axis scale (time axis T/div) Section 5.12

Zoom position Z2

Green frame

50 k

Label of the displayed waveform

Section 8.9

Scale value

Section 8.8

Vertical position mark

Section 5.3

Ground level mark

Section 2.2

Trigger level mark

Section 2.3

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

Displayed waveform channel

Vertical axis sensitivity

Section 5.2

Input coupling Section 5.4

Bandwidth limit Section 5.8

If you change the vertical axis sensitivity while waveform acquisition is stopped, instead of the input coupling and bandwidth limit, the new vertical axis sensitivity is displayed in reverse.

Square frame

Appears when setting the V/div.

Waveform acquisition count

Setup menu

Trigger slope Section 3.2, chapter 6

Trigger source Section 3.2, chapter 6

Trigger level Section 2.3, chapter 6

Trigger mode Section 6.1

Trigger type Section 2.3, chapter 6

Comment

The comment specified when printing or saving the screen image is displayed.

Probe attenuation ratio/current-voltage conversion ratio Section 5.5

IM 701450-02E

Page 9

Parts of the Screen

Main waveform display area

Zoom waveform display area

Screen When Displaying Zoomed Waveforms

User’s manual section 8.4, “Zooming the Waveform”

The zoom position of zoomed waveform Z1 within the specified or displayed record length

The zoom position of zoomed waveform Z2 within the specified or displayed record length

Zoom box Z1 showing the Z1 zoom area

Zoom box Z2 showing the Z2 zoom area

T/div for the main waveform

-> Section 5.12

Record length for the main (normal) waveform display

Record length for the Z1 display

Record length for the Z2 display

T/div for Z2

T/div for Z1

Z1 display frame Z2 display frame

Screen When Displaying Logic Waveforms

User’s manual section 5.10, “Turning ON/OFF the Logic Input and Setting the Threshold Level”

Main (normal) waveform display area

Logic waveform display frame of Pod A

Logic Waveform display frame of Pod B

Logic waveform display frame

As in this example, you can display normal waveforms and logic waveforms simultaneously, or one or the other on the entire screen.

Labels of Pod A bits 0 to 7

Labels of Pod B bits 0 to 7

User’s manual section 8.1, “Setting the Display Format”

IM 701450-02E

Page 10

Main (normal) waveform display area

X-Y waveform display frame

Screen When Displaying X-Y Waveforms

User’s manual section 8.5, “Displaying X-Y Waveform”

Waveform assigned to Yaxis

Waveform assigned to X-axis

X axis scale

Y axis scale

Parts of the Screen

IM 701450-02E

Page 11

Basic Key and Jog Shuttle Operation

This section explains the basics of using the keys and jog shuttle for entering settings on the DL7400.

Basic Key Operation

Working with the Setup Menu

ACQ menu (the menu displayed by pressing the ACQ key)

Setup menu

Selecting Items by using the jog shuttle (in menus with the , and icons)

Press the soft key to enable the jog shuttle ( :enabled, :disabled). Turn the jog shuttle to change the setting.

Selecting Items by displaying a selection menu

Press a soft key to display the corresponding selection menu. Press the soft key corresponding to the desired selection.

Entering values by using the jog shuttle (in menus with the , and icons) Press the soft key to enable the jog shuttle ( :enabled, :disabled). Turn the jog shuttle to select a value. Use the arrow key to change the selected digit.

Selecting an item among displayed selections

Each time you press the soft key, the selection item changes. The selected item is highlighted.

Note

Soft keys

Working with Dialog Boxes

The delay setting dialog box

(Appears when pressing the MEASURE key, then turning the mode ON and pressing the Delay Setup soft key in the setup menu that is displayed.)

Setting dialog box

How to display the setup menu for the functions labeled in purple

Characters Press the SHIFT key (causing the SHIFT indicator above the key to illuminate), then press a key labeled with purple characters to display the corresponding menu.

Use the jog shuttle to select the desired setting.

Press the SELECT key to display the selection menu. Turn the jog shuttle to move the cursor to the desired setting. Press the SELECT key to enter the desired setting.

Each time you press the SELECT key, the selection item changes.

Press the SELECT key to display the numerical value input box. Turn the jog shuttle to select a value. Use the arrow key to change the selected digit.

When mode is selected

When edge count is selected

Selection menu

Numerical value input box

Note

To close a setup menu or dialog box from the screen, press the ESC key.

IM 701450-02E

Page 12

Basic Key and Jog Shuttle Operation

Using a USB Mouse

Introduction to main functions User’s manual section 4.3, “Operating the DL7400

Using a USB Keyboard or USB Mouse.”

If you connect a USB mouse to the USB PERIPHERAL connector on the rear panel of the instrument, you can use the mouse to perform the same operations available with the front panel keys.

Tips

Basic Jog Shuttle Operation

Selecting an Item Entering Numerical Values

Restores the setting to its initial value.

RESET

SELECT

Jog shuttle

Move to the next item up.

Move to the next item down.

RESET

SELECT

Jog shuttle

Decreases (or slows down) the setting value.

Increases (or speeds up) the setting value.

Arrow keys

Moves the digit selection cursor to the left or right.

Shuttle ring

The angle of rotation of the ring determines the rate of change.

USB PERIPHERAL connector (rear panel)

USB mouse (with wheel)

Top menu

Right click in the display (waveform display frame) to display the

If you move the mouse pointer to this position, the pointer changes from a to a . In this mode, if your mouse has a wheel you can use it to change the V/div setting.

top menu containing all the names of the front panel keys.

Sub menus

A sub menu is displayed when clicking on a top menu item accompanied by an arrow (>).

DL7400

If you move the mouse pointer to this position, the pointer changes from a to a . In this mode, if your mouse has a wheel you can use it to change the T/div setting.

Pointer

Move the pointer to the desired item, click it, and the corresponding setup menu appears.

IM 701450-02E

Page 13

Introduction to Main Functions

Trigger

User’s manual chapter 6, “Triggers”

There are two main categories of triggers: simple triggers and enhanced triggers.

Simple triggers

Edge trigger

If the signal input to the measurement input terminal passes through the specified trigger level (on the rising or falling edge, or both edges), the trigger activates.

Enhanced triggers

A->B(N) trigger

A trigger activates the Nth time condition B becomes true after condition A becomes true.

External trigger

If the signal input to the EXT TRIG IN terminal passes through the specified trigger level (on the rising or falling edge, or both edges), the trigger activates.

A Delay B trigger

After condition A becomes true, a trigger activates once condition B becomes true after a specified time has elapsed.

Commercial power trigger

A trigger activates on the rising or falling of the waveform from the commercial power being supplied to the DL7400.

Pattern trigger

A trigger activates when all of the trigger conditions from several trigger sources* are met/not met.

Width trigger

A trigger activates depending on whether the conditions became true or not for a shorter or longer duration than a specified reference time.

TV trigger

A trigger activates on the video signal being input to CH1.

* A trigger source is a signal to which trigger activation conditions are applied.

OR trigger

A trigger activates when at least one of the trigger conditions from several trigger sources is met.

Logic trigger

A trigger activates on a logic signal.

Window trigger

A trigger activates when a trigger source enters or exits a “window” specified by two voltage levels.

History Memory

User’s manual section 10.1, “Displaying History Waveforms”

When measuring waveforms, numerical data is being loaded into the acquisition memory, and that data can be viewed on the DL7400 screen as a waveform. When taking continuous measurements, even if you stop measurement when you see an abnormal waveform, the waveform usually scrolls off the screen by the time measurement stops, preventing you from viewing it carefully. But with the history memory function, you can display past waveform data that has been loaded into the acquisition memory while measurement is stopped. You can displayed a specific waveform from among a maximum of 4096 “history waveforms.” Also, you can search for history waveforms that pass (or do not pass) through a specified search zone. For details on this function, see section 10.2, “Searching the History Waveforms Using Zones (History Search)” in the user’s manual.

History waveform

Specified search zone

Searches for waveforms that pass through the

Selected Record No. 0

Selected Record No. –25

specified search zone.

IM 701450-02E

Page 14

Introduction to Main Functions

Zooming a Waveform along the Horizontal (Time) Axis

User’s manual section 8.4, ”Zooming the Waveform”

You can expand (zoom) a displayed waveform along the time axis. Two areas of a waveform can be zoomed at the same time. This function is useful when you want to observe one part of a waveform in detail that was acquired over a long period of time. You can specify the area to be zoomed or the zoom position (position of the zoom box).

Main (normal) waveform display area

Zoom box Z1

Zoomed waveform

display for Z1

Zoomed waveform

display for Z2

Zoom box Z2

You can display two zoomed waveforms, Z1 and Z2.

X-Y Waveform Display

User’s manual section 8.5, “Displaying X-Y Waveforms”

This function takes the signal level of the specified waveform assigned to the X-axis (horizontal axis), and the signal level of another waveform assigned to the Y-axis (waveform for which display is ON), and displays the relationship between the two. You can observe an X-Y waveform and the normal T-Y waveform (waveform based on the time axis and signal level) simultaneously. Up to two X-Y waveforms can be displayed on the screen.

Waveform Computation

User’s manual chapter 9, “Waveform Computation”

The following operations are available: arithmetic (+, -, x), binarization, inversion, differentiation/integration, phase shift, power spectrum computation (FFT). Instruments equipped with the user-defined math option (/G2) can also perform a second computation chosen from a wide selection of functions including trigonometric, differential, integral, square root, digital filtering, six types of FFT functions.

Math definition dialog box

Enter the desired equation using the keyboard displayed in the dialog box. Up to 55 characters can be used in the equation.

Shows the entered equation.

Shows the current Math1 and Math2 equations.

IM 701450-02E

Page 15

Introduction to Main Functions

Search and Zoom

User’s manual section 10.4, “Searching Waveforms Using the Search and Zoom Function”

You can search saved waveforms and zoom-display those that match the search criteria. The following five search methods are available.

Edge

Performs a search based on the number of times that a waveform falls below or above (rising/falling) a specified level.

Serial pattern

Performs a search based on whether the serial status pattern of the waveform (the status pattern of the waveform that changes over time) is High(H)/Low(L)/Don’t care(X) and whether it is the same as a specified pattern.

Parallel pattern

Performs a search based on whether the parallel status pattern of the waveform (the status pattern of the waveforms at the same point in time) is High(H)/Low(L)/Don’t care(X) and whether it is the same as a specified pattern. You can also search by each bit of a logic signal.

Pulse width

Searches for waveform pulses lying above or below a specified level whose widths are of shorter or longer duration than a specified time.

Auto scroll

The zoom position automatically moves in the specified direction. You can watch the zoomed waveform as it scrolls, then stop it at any desired position.

Analyzing or Searching SPI Signals

User’s manual section 10.11, “Analyzing and Searching SPI Signals”

SPI (serial peripheral interface) is an interface developed by Motorola. In this system, data is transferred using three signal wires: clock signal, output data, and input data. By adding a chip select signal (CS), a master device can control output data from a slave device. Data is synchronized to the clock signal and transmitted in units of bytes (8bits). The DL7400 analyzes and searches these SPI signals in single-byte units.

SCK

I/O1

I/O2 SCK SDO

SDI

Master Slave 2

* Input/output from the viewpoint of the master.

CS1 CS2

Clock

Output data*

Input data*

Slave 1

SCK

Cursor Measurements

User’s manual section 10.5, “Making Cursor Measurements”

You can place cursors on a waveform to display the measured values at the points where the cursor intersects with the waveform. There are four types of cursor available: horizontal, vertical, marker, and angle cursor.

Vertical cursor

Cursor1

Measured values at the cursor Measured values at the cursor

Cursor2

Marker cursor

Marker 2Marker 1

Marker 4

Marker 3

IM 701450-02E

Page 16

Introduction to Main Functions

Automatic Measurement of Waveform Parameters

User’s manual section 10.6, “Automatic Measurement of Waveform Parameters”

This function automatically measures certain properties of a waveform such as the maximum level and frequency. There are 27 parameters that can be measured (including between-waveform delay). Up to 12 of those parameters can be displayed on the screen. From all waveforms, up to 24000 data items total can be saved to a storage medium.

Measured items related to the vertical axis: 10

Measured items related to the time axis: 12

Measured items related to the area: 4

Delay between waveforms

Measured items having to do with the time difference between the rising and falling of the target waveform relative to a reference waveform or trigger point.

Statistical Processing

User’s manual section 10.7, “Performing Statistical Processing of the Measured Values of Waveform Parameters”

The following five results of statistical processing are performed on the same two measured items from automatic measurement of waveform parameters.

Max Min Avg Sdv Cnt (count, or the number of (maximum value) (minimum value) (average) (standard deviation) measured values on which

statistics are taken)

Measurement

range

The following three types of statistical processing are available.

Normal measurement/statistical processing

During measurement, all waveform data acquired up to the current time are measured for the selected measurement item and statistics are calculated.

Measurem

Waveforms are delimited every cycle from the left side of the screen to the right (oldest to youngest), then each cycle is measured for the selected measurement item and statistics are calculated.

Measurem

History waveforms are measured for the selected measurement item, and statistics are calculated. Measurement and statistics are taken starting with the oldest waveforms.

ent

per cycle/statistical processing w

ent and

statistical processing of history waveforms

Statistical items and values

Results of statistical processing

ithin the

measurement range

IM 701450-02E

Page 17

Introduction to Main Functions

GO/NO-GO Determination

User’s manual section 10.9, “Performing GO/NO-GO Determination Using Zones”

User’s manual section 10.10, “Performing GO/NO-GO Determination Using

Measured Waveform Parameters”

This function determines whether a waveform enters or does not enter a specified range, and then performs (GO) or does not perform (NO-GO) a certain action. Determinations are made by specifying a zone on the on-screen waveform, or specifying a waveform parameter range. The GO/NO-GO actions include sounding a buzzer, saving data, printing a screen image, and sending an e-mail message (with the /C10 option installed).

Abnormal waveform

Specified zone

Zone determination start point

Zone determination stop point

Snapshot

User’s manual section 8.6, “Taking Snapshots and Clearing Traces”

When not in Single or Single(N) mode, the displayed waveform is periodically updated or displayed in roll mode. Using the Snapshot function, you can temporarily freeze a waveform on the screen that would ordinarily be lost when the screen is updated. Snapshot waveforms are displayed in white, allowing you to easily compare them with the updated waveforms. Furthermore, you can save snapshot waveforms to a memory medium, or print them out as screen images.

Snapshot waveform

Displayed in white.

Updated waveform

Ethernet Communications

User’s manual chapter 13, “Ethernet Communications (Optional)”

You can transmit data or control the DL7400 using the Ethernet (available with the /C10 option).

Saving and loading data to and from a netw

You can save or load data and screen images to and from an FTP server* on a network in the same way that you can do so using the internal storage medium, external SCSI device, or USB storage device.

ork drive

* A PC or workstation running the FTP server function

Printing to a network printer

Screen images can be printed to a network printer in the same manner as they are printed to the built-in printer (optional) or USB printer.

Sending m

You can have the DL7400 send a mail at regular intervals containing its current settings and measured values. You can also have mail sent based on a GO/NO-GO determination or upon activation of an acquisition trigger that contains the trigger time and other information.

Accessing the DL7400

You can access the DL7400 from any FTP client* on the network, and obtain files from the DL7400 internal storage medium, external SCSI device, or USB storage device.

Web server

You can set up the DL7400 as a Web server. From the DL7400 Web page, you can transmit files, monitor the displayed waveform, perform basic setting operations on the DL7400, and obtain waveform data.

ail

from a PC or workstation

* A PC or workstation running the FTP client function

IM 701450-02E

Page 18

Working with the DL7400

Before connecting the power supply, you must read the warnings in the user’s manual listed in section 3.3, “Connecting the Power Supply and Turning ON/OFF the Power Switch.”

Working with the DL7400

This section provides an example of how you can observe a probe compensation signal being output from the DL7400.

Preparing for an Observation

Connecting the Power Supply

User’s manual section 3.3, “Connecting the Power Supply and Turning ON/OFF the Power Switch”

Power connector

3-prong outlet

Rear panel

Power cord (accessory)

Rated supply voltage: 100 to 120 VAC/200 to 240 VAC Permitted supply voltage range: 90 to 132 VAC/180 to 264 VAC Rated power supply frequency: 50/60 Hz Permitted power supply frequency range: 48 to 63Hz

Turning the Power Switch ON and OFF

User’s manual section 3.3, “Connecting the Power Supply and Turning ON/OFF the Power Switch”

Front panel

OFF ON

Power switch

IM 701450-02E

Page 19

Before connecting the probe, you must read the warnings in the user’s manual listed in section 3.5, “Compensating the Probe (Phase Correction).”

Working with the DL7400

Connecting the Probe

User’s manual section 3.4, “Connecting the Probe”

User’s manual section 3.5, “Compensating the Probe (Phase Correction)”

Probe compensation signal output terminal

Probe

Functional ground terminal

Phase adjustment hole

Note

• For instructions on how to connect a logic probe, see section 3.6.

• When actually making waveform observations using the probe, you must follow the procedures in the user’s manual for probe phase correction (section 3.5), and calibration (section 4.6). Failure to use the probe correctly will result in incorrect waveforms.

IM 701450-02E

Page 20

Working with the DL7400

Displaying a Waveform on the Screen

This section explains how to perform convenient, basic setting initialization and autosetup when you want to display common repeating waveforms such as sine waves and square waves.

Initializing Settings

User’s manual section 4.4, “Initializing Settings”

The procedure below restores the settings that are controlled using the front panel keys to their factory default values. If this is your first time to use the instrument the procedure is not necessary, but performing the procedure now will help you remember it for future reference. This initialization procedure is also useful when reentering settings to match the input signal.

SETUP

Press the SETUP key.

The initialization executes.

To restore the settings prior to initialization, press this button.

Note

• After initialization, display for all channels is turned ON, and the instrument enters START status.

• Items that are not subject to initialization using the soft key procedure are the following.

The date/time setting, communication settings, stored settings, the language setting, and the SCSI ID setting.

To initialize all settings but the date/time setting, perform the procedure below. Note that settings cannot be restored after this procedure. Tu rn the power switch to the DL7400 ON while pressing the RESET key.

Auto Setup

User’s manual section 4.5, “Auto Setup”

You can automatically enter vertical axis, horizontal axis, and trigger settings according to the input signal. This function is useful when you just want to quickly display the signal in order to determine what kind of signal it is and what sort of settings might be required to measure it.

SETUP

Press the SETUP key.

Input signal on CH1

Auto setup executes.

To restore the settings prior to auto setup, press this soft key.

Note

• When you execute auto setup, only the display of the channel on which the signal is being input is ON.

• The waveforms on which auto setup can be performed must have the following properties: Frequency: approximately 50 Hz or higher Absolute value of input voltage: max. value of 20 mV (1:1) or more Ty pe: repeating wave (non-complex)

IM 701450-02E

Page 21

Working with the DL7400

Changing Waveform Display Conditions

This section explains how to split the screen, and how to change settings such as the voltage or vertical axis sensitivity and vertical position, or the time or horizontal axis.

Setting the Screen Divisions to Single

User’s manual section 8.1, “Setting the Display Format”

The default number of screen divisions is four (Quad). In this case we only want to observe channel 1 so we change the setting to Single (1 screen).

DISPLAY

Press the Display key.

Open the selection menu, then choose Single.

Changing the Voltage Axis Sensitivity Setting from 0.5 V/div to 0.2 V/div

User’s manual section 5.2, “Setting V/div”

V/DIV

Turn the T/div knob clockwise to set the voltage axis sensitivity to 0.2 V/div.

One part of the waveform goes out of view due to the rise in the voltage axis sensitivity.

The voltage axis sensitivity setting for CH1

IM 701450-02E

Page 22

Working with the DL7400

Bringing the Waveform’s Entire Amplitude into View by Lowering the Vertical Position

User’s manual section 5.3, “Setting the Vertical Position of the Waveform”

Press the CH1 key.

Turn the jog shuttle counterclockwise to

set Position to –2.50 div.

Lowering the vertical position allows the entire amplitude of the waveform to be displayed.

The ground level mark is also moved.

Changing the Time Axis Setting from 200 µs/div to 100 ms/div

User’s manual section 5.12, “Setting T/div”

The time axis setting is the setting for the amount of time per grid division. If you slow (increase the value of) the time axis setting, the display is updated according to triggers, so the instrument changes from update mode to roll mode in which the waveform scrolls from the right to left side of the screen. Roll mode is useful when you want to observe signals with long periods or signals that change slowly.

TIME/DIV

Turn the TIME/DIV knob counterclockwise to set the time axis setting to 100 ms/div.

Time axis setting on CH1

IM 701450-02E

Roll mode display

Page 23

Working with the DL7400

Changing the Time Axis Setting from 100 ms/div to 500 µs/div

User’s manual section 5.12, “Setting T/div”

The display reverts from roll mode back to update mode, and five periods worth of the waveform is displayed.

TIME/DIV

1Tu rn the TIME/DIV knob clockwise to set the time axis setting to 500 µs/div.

Time axis setting on CH1

Update mode display

IM 701450-02E

Page 24

Working with the DL7400

Changing Trigger Settings

Trigger settings determine which waveforms of the loaded measurement signals to display, and at which times. The following are the most commonly used trigger settings.

Trigger Types

The two main types of triggers are simple triggers and enhanced triggers. For details, see page 12 of this guide.

Trigger Source

A trigger source is a signal to which trigger activation conditions are applied.

Trigger Slope

The slope of a signal is its movement from a low level to a high level (rising), or from a high level to a low level (falling). When specifying the slope as one of the trigger conditions, it is called the trigger slope. The point at which the slope of the trigger source passes through the trigger level is called the edge.

Trigger Level

This is the level through which the trigger source must pass to activate the trigger. With a simple trigger such as an edge trigger (see page 12 of this guide), the trigger activates if the level of the trigger source passes through a trigger level specified in advance.

Trigger Mode

The trigger mode determines the conditions (such as timing and the number of times) at which the waveform display is updated. If you execute auto setup, the trigger mode is set to auto mode. Five trigger modes are available. For details, see section 6.1 of the user’s manual, “Selecting the Trigger Mode.”

Trigger Position

When waveform acquisition is started, triggers are activated according to the trigger conditions, and the waveforms loaded into acquisition memory are displayed. By moving the trigger position on the screen, you can change the ratio of data that is displayed before (pre data) and after (post data) the trigger was activated. The initial setting is 50.0% (center screen).

If you initialize the settings or execute auto setup, the trigger type is set to simple (trigger source: CH1, edge trigger). Edge triggers activate based on the rising, falling, or both, of one input signal. In the procedure below, the trigger type is left as-is (edge trigger), and the method for changing the trigger slope, trigger mode, and trigger position settings is explained.

Changing the Trigger Slope from Rising to Falling

User’s manual section 6.5, “Setting the Edge Trigger (SIMPLE)”

SIMPLE

Press the SIMPLE key.

Trigger point

Press the soft key to select (Falling).

IM 701450-02E

The trigger activates on the falling edge.

Trigger level mark

Page 25

Working with the DL7400

Shifting the Trigger Position to the Left by Two Divisions

User’s manual section 6.2, “Setting the Trigger Position”

By shifting the waveform to the left by just 2 div, the part of the waveform after the trigger (post trigger) becomes much easier to see.

POSITION

Press the POSITION key.

Trigger point

Pre-trigger

portion

Post-trigger portion

Trigger position mark

Turn the jog shuttle counterclockwise to set

Position to 30.0%. The waveform shifts 2 div to the left.

To enter a setting of 10%, 50%, or 90%, press the corresponding soft key.

Changing the Trigger Mode from Auto to Single

User’s manual section 6.1, “Selecting the Trigger Mode”

When a trigger activates in Single mode, the waveform display update stops once, and waveform acquisition stops. Single mode is useful for observing single-shot waveforms.

MODE

Press the MODE key.

When waveform acquisition stops, the status changes from “Running” to “Stopped.”

Select Single.

IM 701450-02E

Page 26

Working with the DL7400

Measuring a Waveform

This section explains how to use the vertical cursors to measure the voltage and period of the displayed waveform. In addition to cursor measurement, the DL7400 also has functions such as automatic measurement of waveform parameters and computation functions that are useful for taking pulse waveform and other types of measurements.

Measuring Voltage with Vertical Cursors

User’s manual section 10.5, “Making Cursor Measurements”

The voltage (Y-axis) and time (X-axis) at the position of the cursor is displayed in the lower part of the waveform display frame.

CURSOR

Press the Cursor key.

Cursor1

X1: X-axis value of Cursor1 X2: X-axis value of Cursor2 ∆X: difference in X-axis values of Cursor1 and Cursor2 1/∆X: reciprocal of the difference in the X-axis values of Cursor1 and Cursor2 Y1: Y-axis value where Cursor1 intercepts the waveform Y2: Y-axis value where Cursor2 intercepts the waveform ∆Y: difference in Y-axis values of Cursor1 and Cursor2

Cursor2

Open the selection menu, then choose

Vertical.

Activate the jog shuttle on Cursor1.

Turn the jog shuttle to move Cursor1.

Move Cursor2 in the same manner.

If you activate the jog shuttle on both Cursor1 and Cursor2, you can move both cursors at the same time.

IM 701450-02E

Note

Cursor Types

When not displaying X-Y waveforms

Horizontal cursor Measures the Y-axis value at the cursor position. Ver tical cursor Measures the X and Y-axis values at the cursor position. Marker cursor Measures the X and Y-axis values of the waveform. The marker cursor moves along the waveform.

M1 to M4 (markers 1 through 4) can be set on separate waveforms.

Angle cursor Measurements can be made by converting the time axis values into angles. The zero point (position of

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

When displaying X-Y waveforms

Horizontal cursor Measures the Y-axis value at the cursor position. Ver tical cursor Measures the X-axis value at the cursor position. Marker cursor Measures the X and Y-axis values of the waveform. The marker cursor moves along the waveform.

Page 27

Working with the DL7400

Zooming a Waveform along the Time Axis

This section describes how to zoom a portion of the displayed waveform along the time axis.

Setting the Zoom Factor

User’s manual section 8.4, “Zooming the Waveform”

You can display two zoomed waveform portions of the original (normal) waveform. The portion of the original waveform that is zoomed is shown by the “zoom box.”

ZOOM

Display frame for zoomed waveform Z1

1 Press the ZOOM key.

Main (normal) waveform display area

Display frame for zoomed waveform Z2

Zoom box Z2

Zoom box Z1

Changing the Zoom Position

2 Select Main&Z1&Z2.

3 Activate the jog shuttle on Z1 Mag. 4 Turn the jog shuttle to select the zoom

factor for Z1.

5 Set Z2 Mag in the same manner.

If you activate the jog shuttle on both Z1 Mag and Z2 Mag, you can set both zoom factors at the same time.

User’s manual section 8.4, “Zooming the Waveform”

You can move the zoom position while watching the zoom box.

ZOOM

1 Press the ZOOM key.

Zoom box Z1

Zoom box Z2

2 Select Main&Z1&Z2.

3 Activate the jog shuttle on Z1 Position. 4 Turn the jog shuttle to move zoom box Z1. 5 Set Z2 Position in the same manner.

If you activate the jog shuttle on both Z1 Position and Z2 Position, you can set both zoom box positions at the same time.

IM 701450-02E

Page 28

Working with the DL7400

Printing and Saving a Waveform

This section describes how to print out the displayed waveform on the built-in printer (when the /B5 option is installed) or save it to a storage medium. You can also print waveforms to a USB or network printer (with the /C10 option installed). Or, if you specified other storage media (floppy disk or Zip disk at the time of purchase, or PC card), you can also save to the installed medium. You can also save to an external SCSI device, network drive (with the /C10 option installed), or USB storage.

Printing Screen Images on the Built-In Printer

User’s manual section 11.2, “Printing Using the Built-In Printer”

You can print the waveform exactly as it appears on screen. Before printing, follow the procedure in section 11.1 of the user’s manual to load roll paper into the built-in printer.

Example of a Printout

1Press the PRINT key. Printing starts.

Note

If you press the PRINT key after the SHIFT key, the PRINT menu appears. Settings using this menu are not required by this operation guide, but it may be useful to know that you can specify the print destination (built-in printer, USB printer, or network printer), the printing format, or comments (printed at the bottom of the screen image).

Saving Screen Image Data to a Storage Medium

User’s manual section 12.12, “Saving Screen Image Data”

You can save the waveform displayed on screen to a storage medium as image data.

Press the SHIFT key. The SHIFT indicator illuminates.

IMAGE SAVE

After pressing the SHIFT key,

press the IMAGE SAVE key.

SHIFT

IMAGE SAVE

Press IMAGE SAVE again.

The image is saved.

PRINT menu

IM 701450-02E

[FD] [ZIP] [PC_Card] [SCSI5] [SCSI5-1]

[NetWork] [USB]

Drive name of the storage medium

: Floppy disk : Zip disk : PC card : SCSI device with the ID number set to 5 : Partition 1 of a SCSI device whose ID

number is 5 : Network drive : USB storage

Open the selection menu, then select a

data format.

Select Color mode.

(if something other than PostScript was selected in step 2)

Display the File List.

Turn the jog shuttle to select a save

medium.

Press the SELECT key to enter the desired

setting.

Page 29

Working with the DL7400

Displaying thumbnails of the screen image data

User’s manual section 12.13, “Displaying Thumbnails of Saved Screen Image Data”

You can display thumbnail (miniature) images of the saved screen image data. Thumbnails make it easy to get a visual overview of what data has been saved.

From the FILE or IMAGE menu, select File List > File, then press the SELECT key.

Thumbnail

Thumbnail list display

From the IMAGE menu, press the Thumbnail soft key.

Tips

Saving Waveform Data to a Storage Medium

User’s manual section 12.8, “Saving/Loading the Waveform Image Data”

You can save the waveform data displayed on screen to a storage medium. When the waveform is saved, its vertical axis, horizontal axis, and trigger settings are also saved.

FILE

1 Press the FILE key.

2 Choose Waveform

(waveform data).

3 Display the Save menu.

Save menu

4 Display the File List.

These settings not required by this operation guide, but you can enter them as needed.

5 Turn the jog shuttle to select a save

medium.

6 Press the SELECT key to enter the

desired setting.

Drive name of the storage medium

See previous page.

7 Execute the save.

IM 701450-02E

YOKOGAWA DL7440, DL7400, DL7480 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Contents

Flow of Operation

Names and Functions of Front Panel Controls

Parts of the Screen

Basic Key and Jog Shuttle Operation

Introduction to Main Functions

Working with the DL7400