YOKOGAWA ScopeCorder DL750P User manual

ScopeCorder
IM 701210-07E
3rd Edition

IM 701210-07E
1
3rd Edition : December 2005 (YK)
All Rights Reserved, Copyright © 2005 Yokogawa Electric Corporation
Foreword
Thank you for purchasing the DL750/DL750P ScopeCorder.
The purpose of this operation guide is to familiarize the first-time user with the basic operations of the DL750/
DL750P. The guide primarily focuses on the basic operations of the DL750.
There are additional user’s manuals for the DL750. The DL750/DL750P User’s Manual Part 1 (IM701210-
05E) and DL750/DL750P User’s Manual Part 2 (IM701210-06E) explain all the functions of the ScopeCorder.
The DL750/DL750P Communication Interface User’s Manual (IM701210-18E on CD-ROM) details the
communication functions. Read these manuals along with this operation guide.
Notes
• The contents of this manual are subject to change without prior notice as a result of continuing
improvements to the instrument’s performance and functions. The figures given in this manual may differ
from those that appear in the actual screen.
•Every effort has been made in the preparation of this manual to ensure the accuracy of its contents.
However, should you have any questions or find any errors, please contact your nearest YOKOGAWA
dealer.
•Copying or reproducing all or any part of the contents of this manual without the permission of Yokogawa
Electric Corporation is strictly prohibited.
•The TCP/IP software of this product and the document concerning the TCP/IP software have been
developed/created by YOKOGAWA based on the BSD Networking Software, Release 1 that has been
licensed from the University of California.
Trademarks
•Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated.
•Zip is either a registered trademark or trademark of Iomega Corporation in the United States and/or other
countries.
•For purposes of this manual, the TM and  symbols do not accompany their respective trademark names or
registered trademark names.
• Other company and product names are trademarks or registered trademarks of their respective companies.
Revisions
1st Edition February 2005
2nd Edition May 2005
3rd Edition December 2005

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Contents
Foreword .......................................................................................... 1
Flow of DL750/DL750P Operation ................................................. 3
Front Panel Controls ....................................................................... 4
Parts of the Screen ......................................................................... 6
Basic Key & Jog Shuttle Operations ............................................. 8
Main Functions of the DL750/DL750P ......................................... 10
Operating the DL750/DL750P....................................................... 16
Making Preparations before Observing Waveforms ..................................... 16
Displaying Waveforms on the Screen .......................................................... 18
Changing the Waveform Display Conditions ................................................ 19
Changing the Trigger Setting........................................................................ 22
Measuring Waveforms ................................................................................. 24
Zooming the Waveform along the Time Axis ................................................ 25
Printing/Saving Waveforms .......................................................................... 26
Setup Menu Items ......................................................................... 28
SETUP (CAL) ............................................................................................... 28
CH1 to CH16 (LOGIC, EVENT, DSP) .......................................................... 29
ACQ.............................................................................................................. 36
ALL CH ......................................................................................................... 36
SIMPLE/ENHANCED ................................................................................... 37
MODE (ACTION).......................................................................................... 38
POSITION (DELAY) ..................................................................................... 40
DUAL CAPTURE .......................................................................................... 41
DISPLAY (X-Y) ............................................................................................. 42
MEASURE (GO/NO-GO) ............................................................................. 44
CURSOR ...................................................................................................... 47
HISTORY ..................................................................................................... 48
MATH ........................................................................................................... 49
ZOOM (SEARCH) ........................................................................................ 50
VOICE MEMO .............................................................................................. 53
PRINT........................................................................................................... 54
IMAGE SAVE ............................................................................................... 55
FILE .............................................................................................................. 55
RECORDER (Only DL750P) ........................................................................ 56
MISC ............................................................................................................ 58

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The figure below is provided to familiarize the first-time user with the general flow of the DL750/DL750P operation as given in the
user’s manual (not the flow of operations given in this guide). For details on each item, see the respective chapter or section in the user’s
manual indicated by the mark.
Making Preparations for Measurements
Displaying Waveforms on the Screen
Changing Waveform Display Conditions
Module Installation
Power Supply Connection and ON/OFF
Probe Connection and Phase Correction
Initialization
Auto Setup
• Horizontal Axis (Time Axis)
• Vertical Axis
• Trigger
• Waveform Acquisition
Computing, Analyzing, and Searching Waveforms
• Computation
• Cursor Measurement
• Automated Measurement of Waveform
Parameters
• GO/NO-GO Determination
Printing and Saving Waveforms
• Printing Screen Image Data
• Save Various Types of Data
Section 3.3
Section 3.4
Sections 3.6, 3.7, and 3.11
Section 4.4
Section 4.5
Sections 5.2 and 5.14
Sections 5.1, 5.3 to 5.12, 5.15 to 5.19
Chapter 6 and section 7.5
Section 7.1
Chapter 10
Section 11.5
Section 11.6
Sections 11.8 to 11.10
Chapter 12
Chapter 13
Displaying Waveforms and Information
Chapter 8
* DL750P only Chapter 9
Recording in Recorder Mode*
Flow of DL750
Flow of DL750
/DL750P
DL750P
Operation
Operation
Flow of DL750/DL750P Operation
Flow of DL750/DL750P Operation

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Front Panel Controls
ACQ key Sections 5.14, 7.2 to 7.4, and 7.6
Displays a menu used to set the w aveform acquisition
mode.
HISTORY key Sections 11.1 and 11.2
Displays a menu used to display past data using
the history memory function.
(SHIFT+) DISPLAY key
Sections 8.1 to 8.13
Displays a menu related to the screen display.
Pressing the SHIFT key followed by the DISPLAY
key displays a menu related to X-Y display.
SELECT key
Confirms the menu item that you selected using
the jog shuttle.
Jog shuttle
Used to change settings and move the cursor.
Turn the shuttle ring to change the amount of
change according to its angle.
(SHIFT+) MEASURE key Sections 11.6 and 11.7
Displays a menu used when performing automated measurement of waveform parameters or cycle
statistical processing. Pressing the SHIFT key followed by the MEASURE key displays a menu
related to GO/NO-GO determination.
CURSOR key Section 11.5
Displays a menu used when performing cursor measurements.
Arrow keys
Moves the cursor left or right.
ALL CH key Section 5.13
Displays a pop-up window containing a list of settings similar to those
displayed on the menu when one of the keys from CH1 to CH16 and
DSP1 to DSP6 (/G3 option) keys is pressed.
START/STOP key Section 7.1
Starts/Stops waveform acquisition according to the trigger mode.
Waveform acquisition is in progress when the indicator above the key is illuminated.
RESET key
Resets the value entry to the initial value (default).
(SHIFT+) SETUP key
Sections 4.4 to 4.6
Displays a menu related to initialization and auto
setup. Pressing the SHIFT key followed by the
SETUP key displays a menu related to calibration.
ESC key Section 8.13
Used to clear the menu. When a menu
is cleared using the ESC key, the
channel information appears. If you
press the ESC key again, the channel
information is cleared, and the
waveform display area is expanded
horizontally.
(SHIFT+) ZOOM key
Sections 8.5 and 11.4
Displays a menu related to the zoom display of
waveforms. Pressing the SHIFT key followed by
the ZOOM key displays a menu related to data
search (search & zoom function). DL750: DUAL CAPTURE key Section 7.6
Displays a menu related to the dual capture function.
DL750P: RECORDER key Chapter 9
Displays a menu related to the recorder mode.
Pressing the SHIFT key followed by the RECORDER key
displays a menu related to the dual capture function.
MATH key Chapter 10
Displays a menu related to the waveform computation.
RECORDER
DUAL
CAPTURE
On the DL750P
VERTICAL
HORIZONTAL
V/DIV knob Section 5.3
You can set the voltage sensitivity using this knob. Before turning it press a key from CH1
to CH16 to select the target channel. If you change the setting while waveform
acquisition is stopped, the settin
g
takes effect when
y
ou restart the waveform acquisition.
CH1 to CH16 keys Chapter 5
Displays a menu used to turn ON/OFF the display
of each channel and set the vertical position,
coupling, probe type, offset voltage, bandwidth
limit, expansion or reduction of the vertical axis,
linear scaling, and waveform labels. The indicator
above each CH key illuminates when the
corresponding channel is ON. In addition,
pressing the SHIFT key followed by a CH key
displays a menu corresponding to the purple
characters indicated to the right of each key.
Pressing the NUM KEY followed by a CH key
causes the gray value marked below and to the left
of each key to be entered.
TIME/DIV knob Section 5.2
This knob is used to set the time axis scale. If you
change the setting while the waveform acquisition
is stopped, the setting takes effect when you restart
the waveform acquisition.
Front Panel Controls
Front Panel Controls
Front Panel Controls

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For details on each control, see the chapter or section in the user’s manual indicated by the mark.
TRIGGER
PROTECT key Section 17.6
Pressing this key causes the LED above the key to illuminate,
and the keys to be disabled. Pressing the key again clears the
condition.
DL750: VOICE MEMO key Section 7.9
Displays a menu related to the voice memo function.
DL750P: FEED key Section 9.1
Executes paper feeding on the DL750P
built-in printer.
Pressing the SHIFT key followed by
the FEED key displays a menu related
to the voice memo function.
SIMPLE/ENHANCED key Sections 6.4 to 6.17
Displays a trigger setup menu. If the indicator below and to the left of the
key is illuminated, simple trigger is enabled; if the indicator below and to
the right of the key is illuminated, enhanced trigger is enabled.
(SHIFT+) MODE key Sections 6.1 and 6.18
Displays a menu used to select the trigger mode.
Pressing the SHIFT key followed by the MODE key displays
a menu related to action-on-trigger or action-on-stop.
(SHIFT+) POSITION key Sections 6.2 and 6.3
Sets the trigger position. Pressing the SHIFT key followed by the POSITION
key allows you to set the trigger delay.
MANUAL TRIG key Section 6.19
Press the key to forcibly activate a trigger.
(SHIFT+) PRINT key Sections 12.2 to 12.4, and 16.4
Executes the printing of the screen image data.
Pressing the SHIFT key followed by the PRINT key displays
a menu used when printing thescreen image to the internal
printer, USB printer,or network printer.
(SHIFT+) IMAGE SAVE key
Sections 13.11, 13.12, and 16.3
Stores the screen image data to the storage medium.
Pressing the SHIFT key followed by the IMAGE SAVE key
displays a menu related to the saving of the screen image data.
SNAPSHOT key Section 8.7
Leaves the currently-displayed waveform on the screen
in black and white.
CLEAR TRACE key Section 8.7
Clears the waveform acquired using the snapshot function and
accumulated waveforms.
NUM KEY key Section 4.2
Press this key to use the CH1 to CH16 keys as number input keys.
MISC key Sections 3.5, 13.6, 16.2 to 16.10, 17.1, to 17.5, and 18.4
Displays menus for setting the communications interface, setting the environment,
checking the system status, setting the SCSI ID number, accessing the self-diagnostic
function, turning ON/OFF the LCD backlight, etc.
HELP key Section 4.7
Turns ON/OFF the help window that provides descriptions about procedures.
SHIFT key
Pressing the key once causes the indicator above the key to illuminate and enables the setup
menu marked below the key in purple to be displayed. Pressing the key again clears the condition.
FILE key Sections 13.5, 13.7 to 13.12, 13.14, to 13.17 and 16.3
Displays a menu used to save or recall data from various storage media or execute file operations.
TRIGGER
VERTICAL
HORIZONTAL
LCD ESC key
For a description, see the previous page.
Soft keys
Used to select items on
the soft key menu that
appears when setting up
the DL750/DL750P.
Setup and execution keys/knob
For a description, see the previous page.
Setup and execution keys
For a description, see the figure below.
Jog shuttle
For a description, see the previous page.
Setup and execution keys
For a description, see the figure below.
On the DL750P
FEED
VOICE MEMO

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Parts of the Screen
Parts of the Screen
Parts of the Screen
This section describes the menus and symbols that appear on the DL750/DL750P screen. For details on each item, see the chapter or
section in the user’s manual indicated by the or mark.
Normal Display Screen
Waveform acquisition condition
Number of waveform acquisitions
Section 7.3
Comment
Sections 12.2 to 12.4 and 13.11
Trigger mode
Section 6.1
Channel and its V/div
Section 5.3
Stopped Pre...: Acquiring pre data
Running Post...: Acquiring post data
Waiting for trigger
HD out: Continuous writing to hard disk
Specified record length
Section 7.2
Acquisition mode
Section 7.3
Sample rate
Section 5.2
T/div
Section 5.2
Trigger position
Section 6.2
Display record length
Appendix 1
Trigger level
Chapter 6
Ground level
Chapter 6
Channel number of the display range
Section 8.9
Scale value of the voltage axis
Section 8.9
Vertical position
Section 5.4
Time from the trigger position
Section 6.2
Trigger type
Chapter 6
Soft key menu
Level indicator
Section 8.12
Channel number of the
displayed waveform
Record length/Display position
(See the explanation below.)
Displaying the Record Length and Display Position
Green frame
Specified record length
Display record length Display record length
Z1
Z2
Z2 zoom position
<When displaying zoom waveforms>
<When displaying normal waveforms>
2.5M
Green frame
2.5M
Z1 zoom position
Parts of the Screen

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Screen When Displaying Zoom Waveforms
Section 8.5, “Zooming the Waveform” in the User’s Manual Part 1
T/div of the normal
waveform display
Section 5.2
Display position of the Z2 zoom waveform on the record length
Z1 zoom range
Display position of the Z1 zoom waveform on the record length
T/div of the Z2 zoom
waveform display
Normal waveform
display area
Zoom waveform
display area
T/div of the Z1 zoom waveform display
Z1 zoom waveform display area Z2 zoom waveform display area
Record length of the Z1
zoom waveform display
Record length of the Z2
zoom waveform display
Record length of the
normal waveform
Z2 zoom range
Screen When Using the Dual Capture Function
Section 7.6, “Using the Dual Capture Function” in the User’s mManual Part 1
T/div of the normal
waveform display
Section 5.2
T/div of the sub waveform
display
Trigger position of the
sub waveform
Normal waveform
display area
Time from the reference
point
Zoom waveform display
area
Sub waveform display area
Date/Time when the main
waveform was stopped
Number of acquisitions of
the sub waveform
Scale value of the time axis of the sub
waveform
Date/Time of the trigger
point of the sub waveform
Position of the sub waveform specified by
Capture Num with respect to the main waveform
Time reference mark

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Basic Key & Jog Shuttle Operations
Basic Key & Jog Shuttle Operations
Basic Key & Jog Shuttle Operations
This section describes basic key and jog shuttle operations used to enter settings on the DL750/DL750P.
Basic Key Operations
Operations When a Setup Menu Is Displayed
In the case of the ACQ menu (Setup menu displayed when the ACQ key is pressed)
Menu type on which the jog shuttle is used to set the value (menu with a or icon)
Press a soft key to set a menu under jog shuttle control ( : selected, : not selected).
Turn the jog shuttle to set the value. Press the arrow keys to change the selected digit.
The NUM KEY key (see page 5) can also be used to enter the value directly.
Menu type on which the jog shuttle is used to select items (menu with a or icon)
Press a soft key to set a menu under jog shuttle control ( : selected, : not selected).
Turn the jog shuttle to change the setting.
Displaying Setup Menus Indicated by Purple Characters on the Front Panel
Press the SHIFT key to illuminate the indicator above the SHIFT key, and then press the key
corresponding to a setup menu marked in purple.
Note
Menu type on which the item is selected from the displayed selections
The selected item switches each time the soft key is pressed. The selected item is
displayed highlighted.
Menu type on which a selection menu is displayed for selecting items
Press a soft key to display a selection menu, then press the soft key corresponding to the
desired menu item.
Setup menu
Soft keys
Operations When a Setup Dialog Box Is Displayed
In the case of the delay setup dialog box
(When MODE is set to ON and the Delay Setup soft key is pressed on the setup menu that appears when the MEASURE key is pressed)
Select the item you wish to set using the jog shuttle.
Press the SELECT key to display the selection menu. Turn the jog shuttle to move the
cursor to the item you wish to set. Press the SELECT key to confirm the selection.
The selection item switches each time the SELECT key is pressed.
Press the SELECT key to display the value entry box. Turn the jog shuttle to set the
value. Press the arrow keys to change the selected digit. The NUM KEY key can also
be used to enter the value directly.
When Mode is selected When Edge Count is selected
Value entry box
Selection menu
Setup dialog box
To clear a setup menu or a setup dialog box from the screen, press the ESC key.
Note
Basic Key & Jog Shuttle Operations

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Operations Using a USB Mouse
Section 4.2, “Entering Values and Strings” in the User’s Manual Part 1
By connecting a USB mouse to the USB PERIPHERAL connector on the side panel, you can use the mouse to perform the same
operations as you would using the front panel keys of the DL750/DL750P.
USB mouse (with a wheel)
DL750/
DL750P
TRIGGER
VERTICAL
HORIZONTAL
USB PERIPHERAL connector
Top menu
Right-click on the screen (waveform display area) to display the names
of the front panel keys as a top menu.
Pointer
Move the pointer to the item you wish to
select and left-click. The setup menu
corresponding to the selected item appears.
Sub menu
For items lower in the hierarchy than the top menu, a sub menu is displayed.
Moving the pointer to this position
causes the pointer’s appearance to
change from to . In this
condition, turn the wheel to change
the T/div setting.
Moving the pointer to this position
causes the pointer’s appearance to change
from to . In this condition, turn the
wheel to change the V/div setting.
Basic Jog Shuttle Operation
Selecting Items Setting Values
Jog shuttle
Select items below the currently-
selected item.
Selects items above the currently-
selected item.
Resets the value to the initial value.
Arrow keys
Move the cursor left or right.
Jog shuttle
Shuttle ring
Varies the amount of change depending on the rotation angle.
Increases (speeds up) the value.
Decreases (slows down) the
value.
Tip

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Main Functions of the DL750/DL750P
Main Functions of the DL750/DL750P
Main Functions of the DL750/DL750P
Trigger
Chapter 6, “Triggering” in the User’s Manual Part 1
There are two main types of triggers: simple triggers and enhanced triggers.
Input signal trigger
A trigger is activated when
the trigger source passes
through a specified trigger
level (rising edge, falling
edge, or both).
External trigger
A trigger is activated when
the signal applied to the EXT
TRIG terminal passes through
a specified trigger level
(rising edge or falling edge).
Line trigger
A trigger is activated on the
rising edge of the power
supply signal.
Timer trigger
A trigger is activated at a
specified time or at specified
time intervals.
A →B(N) trigger
A trigger is activated on the nth time
condition B becomes true after condition
A becomes true.
A Delay B trigger
A trigger is activated on the first time
condition B becomes true the specified
time after condition A becomes true.
Edge On A trigger
A trigger is activated on the OR condition
of the edges while trigger condition A is
true.
OR trigger
A trigger is activated when any one of the
trigger conditions of multiple trigger
sources becomes true.
B > Time trigger
A trigger is activated when the pulse
width is greater than the specified time.
B < Time trigger
A trigger is activated when the pulse
width is smaller than the specified time.
B TimeOut trigger
A trigger is activated when the specified
timeout time is reached.
Period trigger
A trigger is activated when the period of
the signal matches the specified
condition.
Window trigger
A trigger is activated when the trigger
source enters or leaves the range
specified by two signal levels.
Wave window trigger
This trigger is used to monitor the po wer supply waveform. It detects abnormalities in
the po wer supply (disruption, sag, ser ge, frequenc y fluctuation, v oltage drop, etc.).
Applicable waveforms are AC waveforms whose frequenc y is between 40 to 1000 Hz.
A trigger is activated when the waveform deviates from the reference waveform*.
Simple triggers
Enhanced triggers
Waveform created by setting a tolerance to
1 c ycle of the w aveform obtained by
averaging 1 to 4 previous cycles of 1 cycle
of the w aveform set to be the reference
(realtime template).
*
Linear Scaling
Section 5.11, “Using the Linear Scaling Function (AX+B, P1-P2)” in the User’s Manual Part 1
Linear scaling is a function used to convert measured values (mainly voltage) to physical values. The following two methods are
available.
AX + B
Computation is performed using scaling coefficient A and offset B according to the following equation.
Y = AX + B (X: measured value, Y: physical value)
P1-P2
Specifying the physical values after the conversion that correspond to
the measured values of two arbitrary points (P1:X, P2:X) determines
the scale conversion equation (y = ax + b). Computation is performed
using this conversion equation.
Main Functions of the DL750/DL750P
Measurement range
P1
P2
P1:X P2:X
P1:Y
P2:Y
y = ax+b
Measured value
Physical value

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History Memory
Section 11.1, “Displaying History Waveforms” in the User’s Manual Part 2
When waveforms are being measured, the waveform data stored in the acquisition memory is displayed as waveforms on the DL750/
DL750P screen. When waveforms are continuously measured, it is impossible to stop the measurement in time when an abnormal
waveform appears (newer waveforms appear on the screen). Normally, past abnormal waveforms cannot be displayed. However, past
waveform data stored in the acquisition memory can be displayed using the history memory function while measurement is stopped. Yo u
can display a specified past waveform data from the data (up to 2000 screens worth) stored in the acquisition memory. In addition, you
can search for waveforms that passed (or did not pass) a specified zone from waveforms stored in the acquisition memory. For details,
see sections 11.2 and 11.3 in the user’s manual.
Waveforms stored in the acquisition
memory(Up to 2000 screens)
Selected Record No. 0 Selected Record No. –25
Specified zone
Detects the waveform
that passed through the
specified zone.
Selected Record No. -28
Selected Record No. 0
P-P
Detects a waveform
whose P-P exceeds
a specified range
Item Setup : P-P
Condition : OUT
Waveforms stored in the acquisition
memory(Up to 2000 screens)
Zone Paramerter
Dual Capture
Section 7.6, “Using the Dual Capture Function” in the User’s Manual Part 1
This function enables trend recording in low-speed roll mode1 while acquiring data at high speeds. The function is useful when capturing
at high speeds abnormal phenomena that occur suddenly during long-term observations, such as in an endurance test.
You can detect the occurrence of burst waveforms. However, since the time resolution of the measured
data is not high enough, you are unable to determine how many burst waveforms occurred. (T/div: 100 µs/div)
Zoom waveform (zooming the time axis)
Sub waveform (dual capture)
Since data can be acquired at high sample
rates (up to 10 MS/s), you can observe 5
incidents of burst waveforms.
(T/div: 100 µs/div)
Up to 100 MW*
100 screens maximum
(standard model)
250 screens maximum
(/M1 model)
500 screens maximum
(/M2 and /M3 models)
High speed (sub waveform)
Update mode display (trigger recording)
Low speed (main waveform)
Roll mode display (trend recording)
Up to 10 kW
Enables data acquisition at two
different sample rates on a single unit.
TRIGGER
VERTICAL
HORIZONTAL
Sample rate: 100 kS/s or less Sample rate: 10 MS/s or less
Main waveform
* Up to 100 MW when the /M3 option is installed. Up to 5 MW on the standard model.
1. If the trigger mode is set to Auto, Auto Level, Single, or Log and the time axis is set between 100 ms/div and 3 day/div, the waveform is
displayed in roll mode. In roll mode, the displayed waveform is not updated on the occurrence of triggers (update mode). Rather, the oldest
data is deleted as new data is acquired, and the waveform is shifted from right to left on the screen.

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X-Y Waveform Display
Section 8.6, “Displaying X-Y Waveforms” in the User’s Manual Part 1
The voltage relationship between signals can be observed by assigning the voltage of the input signal of the specified channel on the
horizontal axis (X-axis) and the voltage of another input signal (signal that has the display turned ON) on the vertical axis (Y-axis).
Simultaneous observation of an X-Y waveform and a normal T-Y waveform (waveform display using time axis and voltage axis) is also
possible.
Up to 16 X-Y waveforms can be displayed overlapped. The display of multiple X-Y waveforms facilitates the comparison of the relative
phase. This function can be used to evaluate DC motors using lissajous waveforms.
Zooming along the Time Axis (GIGAZoom)
Section 8.5, “Zooming the Waveform” in the User’s Manual Part 1
The displayed waveform can be expanded (zoomed) along the time axis. Two locations can be zoomed at once. This function is useful
during long waveform acquisitions where you wish to observe a particular section of the waveform closely.
In addition, high-speed data processing enables instantaneous display of the entire 1 GW (1 CH) of data (/M3 option).
Realtime display of the entire 1 GW
of data through high-speed
data processing 1 GW
Displays zoom waveforms
(Z1 and Z2) of two arbitrary
locations.
Z1 zoom box Z2 zoom box
Normal waveform window
Zoom waveform window (Z1) Zoom waveform window (Z2)
Automated Measurement of Waveform Parameters
Section 11.6, “Automated Measurement of Waveform Parameters” in the User’s Manual Part 2
This function automatically measures parameters such as the waveform frequency and rise time. There are 29 waveform parameters. Up to
24000 data points for all waveforms can be saved. Of those, up to 24 arbitrary parameters can be displayed on the screen.
Delay parameter (1)
Time difference from the reference waveform or trigger
point to the rising or falling edge of the target waveform.
Parameters related to (delay between channels)
Time-axis parameters (12)
Vertical-axis parameters (12) Other parameters (4)
Cycle Statistical Processing
Section 11.7, “Performing Statistical Processing” in the User’s Manual Part 2
Automatically divides a periodic waveform stored to the acquisition memory into cycles, and measures the waveform parameters. Then,
statistical processing is performed on the automated measurement values. The DL750/DL750P screen displays 5 statistical processing
parameters (maximum (Max), minimum (Min), average (Avg), standard deviation (sdv), and the number of measured values used in the
statistical processing (Cnt)) on the automated measurement parameters of the waveform. A list of all measured values can also be displayed.
Statistical processing can be performed on up to 48000 automated measurement values of a single waveform parameter. If statistical
processing is performed on 1 automated measurement parameter, statistical processing of up to 48000 cycles is possible. In addition to the
cycle statistical processing, the DL750/DL750P has “normal statistical processing” and “statistical processing of the history memory.”
Automated measurement parameters are measured in each range,
a, b, and c, and statistical processing is performed on the
automated measurement parameters in the order a, b, and c. The
automated measurement parameters of other channels are also
measured using ranges a, b, and c. Automated measurement can
also be made using the cycle of each waveform as the range.
CH2
CH1
abc
Example in which CH1 is selected as the waveform used to determine the cycle
Main Functions of the DL750/DL750P

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Computation (Standard) & User-Defined Computation (/G2 Option)
Section 10.5, “User-Defined Computation (Optional)” in the User’s Manual Part 2
The following types of computation are possible: +, –, ×, /, FFT (power spectrum), and phase shift computation (computation with the
phase between channels shifted). On models with the user-defined computation function (/G2 option), up to 8 equations can be defined
using abundant functions (such as trigonometric functions, differentiation, integration, square root, digital filter, and 7 types of FFT
functions).
Equation setup menu
Using the software keyboard
on the screen, enter the desired
equation using up to 55
characters.
The entered equation
is displayed.
GO/NO-GO Determination
Section 11.8, “GO/NO-GO Determination Using Measured Waveform Parameters” to 11.10, “Using the GO/NO-GO Determination I/O
Function” in the User’s Manual Part 2
The GO/NO-GO function is useful when you want to inspect signals or track down abnormal symptoms on a production line.
The function determines whether the waveform is within the preset range and performs a predetermined action when the decision is GO
(or NO-GO). There are two methods in making the determination: a method in which a waveform zone is set on the screen and a method
in which a waveform parameter range is specified. The possible actions taken when a specific determination is made include printing/
saving of the screen image data, saving of the waveform data, sounding of a beep, and sending of an e-mail message (with the /C10
option).
Zone determination start point
Abnormal waveform
Specified zone
Zone determination end point
Snapshot
Section 8.7, “Taking Snapshots and Clearing Traces” in the User’s Manual Part 1
When the trigger mode is set to a mode other than Single, the screen display is either in update mode, in which the display is updated
periodically, or roll mode (see “Dual Capture” on page 11). By using the snapshot function, you can temporarily hold the waveform that
would be cleared when the screen is updated as a snapshot waveform on the screen. The snapshot waveform is displayed in white,
allowing for easy comparison against the updated waveform. In addition, the snapshot waveform can be saved to a storage medium or
the screen image data can be printed.
Snapshot waveforms
Displayed in white.
Updated waveform
Acquisition Memory Backup
Section 7.10, “Using the Acquisition Memory Backup Function” in the User’s Manual Part 1
This function protects the data in the acquisition memory from sudden power failures. Turn ON the ACQ MEMORY BACKUP switch
on the right side panel to protect the data in the acquisition memory even when the power supply is cut off. The data held in the
acquisition memory immediately before the power is turned OFF is backed up.
Alkaline dry cells or nickel hydride rechargeable batteries (four AAA batteries) are required for the backup.

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Main Functions of the DL750/DL750P
Realtime Recording to the Internal Hard Disk (/C8 Option)
Section 7.7, “Realtime Recording to the Internal Hard Disk (Optional)” in the User’s Manual Part 1
Measured data can be saved in realtime over long periods to the internal hard disk (requires the /C8 option). On the internal hard disk,
half the total size of the disk is allocated beforehand to be used as area for realtime recording. You can set the size of the realtime
recording area in the range of 30% to 70% of the entire capacity of the internal hard disk. The saved data can be loaded, and the
measured data can be managed and analyzed on a PC.
Input signal
Copy
Acquisition
memory
Measurements other
than realtime recording
(normal measurement)
Realtime recording
Load waveform data
Save and Load setup data
PC
Realtime
recording area
(30% to 70% of the
entire capacity)
Data
storage area
Copy
SCSI
GP-IB interface
Ethernet interface
USB interface
Internal hard disk
Recording in Recorder Mode (Realtime Recording) (DL750P Only)
Chapter 9, “Recording in Recorder Mode (Realtime Recording)” in the User’s Manual Part 1
The DL750P is equipped with a recorder mode in which waveforms and numeric values can be recorded on a built-in A4-size printer. The
recorder mode is set using the RECORDER key on the DL750P front panel. There are two recorder modes.
Chart Recorder Mode
When waveform acquisition is started, waveforms and numeric values can be recorded in realtime on the built-in printer. Because the
data is saved to the internal memory at the same time, the required sections can be redisplayed such as by using the search & zoom
function after the recording is completed. The stored data can be handled in the same fashion as normal data such as saving the data to a
file, performing cursor measurements, automated measurement of waveform parameters, normal statistical processing, and search & zoom.
•T-Y Waveform Recording
T-Y waveforms are recorded at a specified chart speed. If shot recording is specified, the recording stops automatically when the specified
length of data is recorded. The data can be reprinted by changing the print conditions, and a PDF file of the reprinted image can be created.
•Numeric Value Recording
The numeric values are recorded at specified time intervals. Up to 16 channels can be recorded at once.
X-Y Recorder Mode (X-Y Waveform Recording)
When waveform acquisition is started and stopped, the X-Y waveforms during the waveform acquisition period can be recorded. If auto
print is specified, the recording of the X-Y waveforms starts when waveform acquisition is stopped. A PDF file of the reprinted image
can be created.
Chart speed or
recording interval
Recording graticule
Acquisition mode
Trigger mode
Number of data points that can
be saved to the internal memory
Functions that cannot
be used simultaneously
Chart Recorder Mode
T-Y waveform recording
Chart speed:
10 mm/h to 20 mm/s
Horizontal axis (time axis): 10 mm/div
Vertical axis: 10 mm/div or [1 division of
the 10 equally divided recording area]/div
Envelope (the mode cannot be changed with the ACQ key,
envelope and normal can be changed with the MISC key)
Auto, Log, Single
1
, Repeat
1
(1: Only during T-Y waveform recording)
Up to 1000 div (varies depending on the chart speed)
History memory, GO/NO-GO determination, dual capture, waveform computation,
and search & zoom (only during X-Y Recorder mode)
Numeric value recording
Recording interval:
1 s to 60 min
—
X-Y Recorder mode
(X-Y waveform recording)
—
X-axis/Y-axis: 10 mm/div or
[1 division of the 10 equally
divided recording area]/div
Normal (the mode cannot be
changed with the ACQ key)
—
Fixed to 1 MW
Chart Recorder mode and X-Y Recorder mode

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DSP Channel (/G3 Option)
Chapter 15, “Using the DSP Channel (Optional)” in the User’s Manual Part 2
When the /G3 option is installed, 6 dedicated computation channels (DSP1 to DSP6) are added in addition to the standard analog input
channels (CH1 to CH6). The following computations can be performed in realtime using the output data of the input module as a source
on the DSP (Digital Signal Processor) channels.
• Addition, subtraction, multiplication, and division (+, –, ×, and ÷) between channels
•Digital filter (sharp, Gauss, IIR (Butterworth), and moving average)
• Differentiation and integration
•Addition, subtraction, multiplication, and division (+, –, ×, and ÷) with coefficients between channels
•Knocking filter
Below are the characteristics of the computation using DSP channels as compared with normal computation.
Acquisition
memory
DSP 6 channels
(DSP1 to DSP6) Trigger
GIGAZoom engine
Analog input
16 channels
(CH1 to CH16) Trigger
system
Record length limitation
Maximum sample rate
Trigger source target
Computation during
roll mode display
Applicable modules
Executable computations
Normal Computation (Math1 to Math8)
Exist (Up to 800 kW (when displaying 1 channel))
Maximum sample rate of each module
None
None (computes after waveform acquisition stops)
All modules
Complicated computations and various equations
(Addition, subtraction, multiplication, division,
binary computation, power spectrum, and
user-defined computation (/G2 option)
Computation on DSP Channels (DSP1 to DSP6)
None (same as analog input channels)
100 kS/s
Yes (Only simple trigger and OR trigger/window
trigger of enhanced triggers)
Yes (computed in realtime)
All modules
Comparatively simple computation
(Addition, subtraction, multiplication, division,
digital filter, differentiation, and integration
Comparison of Normal Computation (Math1 to Math8) and Computation on DSP Channels (DSP1 to DSP6)
Analog input
16 channels
(CH1 to CH16)
Main CPU
GIGAZoom engine
Computed
result
• Normal Computation (Math1 to Math8) • Computation on DSP Channels (DSP1 to DSP6)
* A/D : A/D converter
** FF : Flip-flop circuit * A/D : A/D converter
** FF : Flip-flop circuit
DSP1
FF**
FF**
CH1
A/D*
FF**
CH1
A/D*
Acquisition
memory
Voice Memo & Voice Comment
Section 7.9, “Using the Voice Memo Function” to 13.19, “Using the Voice Comment Function” in the User’s Manual
Voice Memo
By connecting a earphone microphone with a PUSH switch to the
DL750/DL750P, you can record your voice as a memo while
waveforms are being acquired (when in roll mode display). The
recorded voice can be played when the corresponding waveform is
being displayed. The recorded voice memo can be saved along
with the waveform data and can be played from the Voice Memo
menu.
Target waveform
(When in roll
mode display)
Event waveform
Voice memo Voice memo is also
saved as waveform
data when the
waveform data is saved.
Voice Comment
By connecting a earphone microphone with a PUSH switch to the
DL750/DL750P, you can record a comment on the displayed
waveform using your voice. When saving the screen image data,
the voice comment can also be saved. The maximum length of
voice comment that can be attached to a single screen image data
is 10 s. The saved voice comment can be played from the File
List window of the IMAGE and FILE menus.
• Screen image data • Voice comment data
Record time: 10 s
Data whose
extension is
.PNG, .JPG,
.BMP, or .PS
Data whose
extension is
.NCM, .JCM,
.BCM, or .PCM
Can be saved simultaneously. (Screen image data and voice
comment data are saved as separate files.)

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Operating the DL750
Operating the DL750
/DL750P
/DL750P
Operating the DL750/DL750P
The operation explained in this section is used to observe a signal (probe compensation signal) that is generated by the DL750/DL750P.
Therefore, there is no need to prepare a separate signal generator. Additionally, this operation guide describes an example in which
waveforms are observed using the High-Speed 10 MS/s, 12-Bit Isolation Module (model: 701250, abbreviated name: HS10M12). For
operation using other input modules, see the user’s manual.
Making Preparations before Observing Waveforms
Install the Module
Section 3.3, “Installing Input Modules” in the User’s Manual Part 1
To use the DL750/DL750P in a safe manner, read the warnings given in section 3.3, “Installing
Input Modules” in the user’s manual before installing the module.
Install the module in the input module installation slot on the right side panel.
Module
Right side panel
Attach a cover plate in slots in which
no modules are installed.
Connect the Power Supply
Section 3.4, “Connecting the Power Supply” in the User’s Manual Part 1
To use the DL750/DL750P in a safe manner, read the warnings given in section 3.4,
“Connecting the Power Supply” in the user’s manual before connecting the power supply.
3-pin outlet
Power cord
Power connector
Left side panel
Rated supply voltage: 100 to 120 VAC/200 to 240 VAC
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
Operating the DL750/DL750P

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Turn ON the Power Switch
Section 3.4, “Connecting the Power Supply” in the User’s Manual Part 1
Power switch
Connect the Probe
Section 3.6, “Connecting Probes” and 3.7, “Compensating the Probe (Phase Correction)” in the User’s Manual Part 1
To use the DL750/DL750P in a safe manner, read the warnings given in section 3.6,
“Connecting Probes” and the cautions given in section 3.7, “Compensating the Probe (Phase
Correction)” in the user’s manual before connecting the probe.
Probe compensation
output terminal
Functional ground terminal
Signal input terminal
When actually observing waveforms, make sure to perform phase correction (section 3.7) and calibration (section 4.6) of the probe according
to the instructions in the user’s manual. Otherwise, waveforms cannot be observed correctly.
Note

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Displaying Waveforms on the Screen
This section explains the operations of setup initialization and auto setup that are useful when displaying typical repetitive waveforms
such as sine and rectangular waves.
Initialize Settings
Section 4.4, “Initializing Settings” in the User’s Manual Part 1
The settings made using the front panel keys are reset to factory default. This operation is not necessary if you are using the DL750/
DL750P for the first time after purchase. However, we recommend that you try the operation for future reference. This initialization
operation is useful when you wish to redo the settings from scratch according to the input signal.
2 Press Initialize.
1 Press the SETUP key.
To set the DL750/DL750P back to the condition that
existed immediately before the initialization, press here.
• When initialization is executed, all the channels with
modules installed are displayed, and the
DL750/DL750P enters the START condition.
• The items that cannot be initialized using the Initialize
soft key are as follows:
Date/time settings, language settings, communication
settings, and SCSI ID setting
To initialize all settings except the date/time, carry out
the following procedure.
[Turn ON the power switch while holding down the
RESET key]
Note
Perform Auto Setup
Section 4.5, “Performing Auto Setup” in the User’s Manual Part 1
Voltage axis, time axis, trigger, and other settings are automatically configured according to the input signal. This is useful when you
wish to quickly display the waveform or when you do not know the setup conditions because the characteristics of the input signal are
unknown.
1 Press the SETUP key.
To return the DL750/DL750P back to the condition
that existed immediately before auto setup, press here.
2Press Auto Setup.
CH1 input signal
• When auto setup is executed, only the waveforms of the
channels in which signals are being applied are displayed.
• Modules that can be automatically setup
701250 (HS10M12), 701251 (HS1M16), 701255
(NONISO_10M12), 701260 (HV (with RMS)), 701261
(UNIVERSAL), 701262 (UNIVERSAL (AAF)), and
701275 (ACCL/VOLT)
• Applicable waveforms for auto setup
Frequency: Approx. 50 Hz to 1 MHz
Type: Uncomplicated repetitive waveforms
Note
Operating the DL750/DL750P

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Changing the Waveform Display Conditions
This section explains the operations used to divide the screen into windows and change settings such as the voltage sensitivity and
vertical position (vertical axis) and the time axis (horizontal axis).
Set the Number of Windows to Single
Section 8.1, “Changing the Display Format” in the User’s Manual Part 1
By default, the screen is divided into 4 windows (Quad). Since only CH1 is observed in this case, the display format is set to Single.
2 Display the selection menu and select Single.
1 Press the DISPLAY key.
Change the Voltage Sensitivity from 0.5 V/div to 0.2 V/div
Section 5.3, “Setting V/div” in the User’s Manual Part 1
1Turn the V/DIV knob clockwise and set the voltage sensitivity to 0.2 V/div.
Since the voltage sensitivity is increased, a section of the waveform goes off the display.
Set the voltage sensitivity of CH1