YOKOGAWA DLM2000 Series User manual

IM 710105-01E
4th Edition
Mixed Signal Oscilloscope
Features Guide
DLM2000 Series

i
IM 710105-01E
Thank you for purchasing the DLM2000 Series Mixed Signal Oscilloscope. This manual contains
useful information about the features of the DLM2000. To ensure correct use, please read this
manual thoroughly before beginning operation. After reading the manual, keep it in a convenient
location for quick reference whenever a question arises during operation.
List of Manuals
The following four manuals, including this one, are provided as manuals for the DLM2000. Read
them along with this manual.
Manual Title Manual No. Description
DLM2000 Series
Mixed Signal Oscilloscope
Features Guide
IM 710105-01E This manual. The supplied CD contains the PDF file of
this manual. It explains the DLM2000 features.
DLM2000 Series
Mixed Signal Oscilloscope
User's Manual
IM 710105-02E The supplied CD contains the PDF file of this manual.
The manual explains how to operate the DLM2000.
DLM2000 Series
Mixed Signal Oscilloscope
Operation Guide
IM 710105-03E The manual explains the handling precautions and basic
operations of the DLM2000.
DLM2000 Series
Mixed Signal Oscilloscope
Communication Interface
User’s Manual
IM 710105-17E The supplied CD contains the PDF file of this
manual. The manual explains the DLM2000 series
communication interface features and instructions on
how to use them.
• 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 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.
Trademarks
• DLM is pending trademark of Yokogawa Electric Corporation.
• Microsoft, Internet Explorer, MS-DOS, Windows are either registered trademarks or trademarks
of Microsoft Corporation in the United States and/or other countries.
• Adobe, Acrobat, and PostScript are trademarks of Adobe Systems Incorporated.
• For purposes of this manual, the ® and TM symbols do not accompany their respective
registered trademark names or trademark names.
• Other company and product names are registered trademarks or trademarks of their respective
companies.
Revisions
• 1st Edition: November 2008
• 2nd Edition: March 2009
• 3rd Edition: February 2010
• 4th Edition: April 2011
4th Edition : April 2011(YMI)
All Rights Reserved, Copyright © 2008 Yokogawa Electric Corporation
All Rights Reserved, Copyright © 2011 Yokogawa Meters & Instruments Corporation

ii IM 710105-01E
Features and Firmware Versions Covered by This Manual
This manual covers firmware versions 1.80 or later of the DLM2000 series.
The relationship between firmware version and new features is given in the table below.
You can check the firmware version of the DLM2000 in the overview screen. For instructions on
how to display the overview screen, see section 21.4 in the user’s manual, IM710105-02E.
For information on the latest firmware version and to learn how to update your DLM2000, go to the
following Web page, and then browse to the download page.
http://tmi.yokogawa.com/service-support/downloads/
Version Suffix Code New Features
1.20 or later Normal Web server
Network drive
USB storage of PC data
/G2 User-defined computation
/G4 Power supply analysis
1.60 or later /F5 or /F6 FlexRay trigger & analysis
1.80 or later Saving of the serial bus analysis results for all history waveforms
Screen capture data and waveform data can be printed and saved to multiple
output destinations at the same time (Multi)
Saving of waveform data with time information
Saving of frequency information with FFT results
Removing of the auto naming feature's character limit; addition of a feature
for using the date and time when the file was saved as the file name
Saving of the list of timestamps to a file in CSV format
Overwriting of files when the auto naming feature is off
Name and unit assignments for each definition when configuring settings for
computations that use automatically measured values
Additions to the XY waveform cursor measurement items (ΔX and ΔY)
A feature for displaying the waveform that corresponds to the selected
measured value on the list display for statistical processing of history data
and cyclic statistical processing
A feature for selecting whether to restart statistical processing when the
trigger level is changed during normal statistical processing
Assignment of user-defined units to FFTs
A feature for initializing settings to the default values of legacy models (DL1600
series and DL1700 series)
POP3 user authentication for email transmission
A feature for turning the FTP/Web server feature and the VXI11 server
feature on and off
Windows 7 compatible USB storage device feature (read-only)

iii
IM 710105-01E
Contents
1 Vertical Axis (Analog Signal)
Turning the Display On and Off (Display) ..................................................................................... 1-1
Vertical Scale (SCALE) ................................................................................................................. 1-1
Waveform Vertical Position (POSITION) ...................................................................................... 1-2
Input Coupling (Coupling) ............................................................................................................. 1-3
Probe Attenuation (Probe) ............................................................................................................ 1-3
Inverted Waveform Display (Invert) .............................................................................................. 1-4
Linear Scaling (Linear Scale)........................................................................................................ 1-4
Label Display (Label) .................................................................................................................... 1-5
Bandwidth (Bandwidth) ................................................................................................................. 1-5
Offset (Offset) ............................................................................................................................... 1-5
2 Vertical Axis (Logic Signal)
Turning the Display On and Off (Display) ..................................................................................... 2-1
Vertical Display Range (SCALE)................................................................................................... 2-1
Vertical Position (POSITION)........................................................................................................ 2-1
Setting the Bits (Bit Setup)............................................................................................................ 2-1
Conguring the Display (Display Setup) ....................................................................................... 2-1
Noise Rejection (Noise Rejection) ................................................................................................ 2-2
Setting the Threshold Level for Each Bit (Threshold Type) .......................................................... 2-3
Threshold Level (Threshold)......................................................................................................... 2-3
Deskew (Deskew) ......................................................................................................................... 2-3
3 Horizontal Axis (Time Axis)
Time Axis Setting (TIME/DIV) ....................................................................................................... 3-1
4 Triggering
Trigger Mode (Trigger Mode)........................................................................................................ 4-1
Trigger Type (Type)....................................................................................................................... 4-2
Signal Type and Trigger Type Combinations ................................................................................ 4-2
Basic Trigger Settings................................................................................................................... 4-3
Trigger EDGE [EDGE] .................................................................................................................. 4-3
Edge OR Trigger [ENHANCED].................................................................................................... 4-8
Edge Qualied Trigger [ENHANCED]........................................................................................... 4-9
State Trigger [ENHANCED] ........................................................................................................ 4-10
Pulse Width Trigger [ENHANCED] ............................................................................................. 4-12
State Width Trigger [ENHANCED] .............................................................................................. 4-14
Serial Bus Trigger [ENHANCED] ................................................................................................ 4-17
CAN Bus Trigger [ENHANCED, option] ...................................................................................... 4-18
LIN Bus Trigger [ENHANCED, option] ........................................................................................ 4-25
UART Trigger [ENHANCED, option] ........................................................................................... 4-29
I2C Bus Trigger [ENHANCED, option]......................................................................................... 4-31
SPI Bus Trigger [ENHANCED, option]........................................................................................ 4-36
FlexRay Bus Trigger [ENHANCED, option] ................................................................................ 4-38
User-Dened Serial Bus Trigger [User Dene, ENHANCED]..................................................... 4-44
TV Trigger [ENHANCED]............................................................................................................ 4-46
Trigger B [B TRIG] ...................................................................................................................... 4-49

iv IM 710105-01E
Contents
5 Executing Actions
Action Mode (Mode)...................................................................................................................... 5-1
Action to Execute When Conditions Are Met (Action)................................................................... 5-1
Number of Actions (Action Count/Nogo Count) ............................................................................ 5-2
Executing Action-on-Trigger or GO/NO-GO determination (Exec) ............................................... 5-2
GO/NO-GO Determination (Go/Nogo AND, Go/Nogo OR)........................................................... 5-2
6 Waveform Acquisition
Record Length (Record Length) ................................................................................................... 6-1
Acquisition Mode (Mode) .............................................................................................................. 6-2
High Resolution Mode (Hi Resolution).......................................................................................... 6-3
Interleave Mode (Interleave)......................................................................................................... 6-3
Sampling Mode (Sampling Mode)................................................................................................. 6-4
Waveform Acquisition (RUN and STOP)....................................................................................... 6-5
Waveform Acquisition (SINGLE)................................................................................................... 6-5
7 Display
Types of Windows......................................................................................................................... 7-1
Display Format (Format)............................................................................................................... 7-1
Display Interpolation (Dot Connect).............................................................................................. 7-2
Graticule (Graticule)...................................................................................................................... 7-3
Scale Value Display (Scale Value)................................................................................................ 7-3
Accumulate (Accumulate) ............................................................................................................. 7-4
8 Displaying XY Waveforms
Turning the XY Waveform Display On and Off (Display) .............................................................. 8-1
X-Axis and Y-Axis Source Waveforms (X Trace/Y Trace)............................................................. 8-1
Conguring the Display (Display Setup) ....................................................................................... 8-1
Display Area (T Range1/T Range2).............................................................................................. 8-2
Measurement (Measure Setup) .................................................................................................... 8-2
9 Computed and Reference Waveforms
Computation Mode (Mode) ........................................................................................................... 9-1
Computation Source Waveforms (Source1/Source2)................................................................... 9-1
Reference Waveforms .................................................................................................................. 9-1
Operators (Operation)................................................................................................................... 9-2
Initial Point (Initial Point) ............................................................................................................... 9-5
Setting Labels and Units (Label/Unit) ........................................................................................... 9-5
Scaling (Ranging) ......................................................................................................................... 9-5
User-Dened Computation (User Dene, Option) ........................................................................ 9-6
10 FFT
Turning the FFT On or Off (Display) ........................................................................................... 10-1
Analysis Source Waveform (Trace) ............................................................................................ 10-1
FFT Conditions (FFT Setup) ....................................................................................................... 10-2
Number of FFT Points (FFT Point) ............................................................................................. 10-3
Analysis Range (Time Range) .................................................................................................... 10-3
Scale Value (Display Setup) ....................................................................................................... 10-4
Cursor Measurement (Measure Setup) ...................................................................................... 10-4

v
IM 710105-01E
11 Cursor Measurement
Turning Cursor Measurement On and Off (Display) ....................................................................11-1
Cursor Mode (Type) .....................................................................................................................11-1
Measurement Source Waveform (Trace).....................................................................................11-1
ΔT Cursors (ΔT)...........................................................................................................................11-2
ΔV Cursors (ΔV) ..........................................................................................................................11-2
ΔT&ΔV Cursors (ΔT&ΔV) ............................................................................................................11-3
Marker Cursors (Marker)..............................................................................................................11-3
Angle Cursors (Degree)...............................................................................................................11-4
Moving the Cursors (Cursor/Marker) ...........................................................................................11-4
Cursor Jumping (Cursor Jump)....................................................................................................11-5
12 Automated Measurement of Waveform Parameters
Turning Automated Measurement On or Off (Display)................................................................ 12-1
Source Window (Time Range).................................................................................................... 12-1
Measurement Time Period (T Range1/T Range2)...................................................................... 12-1
Automated Measurement of Waveform Parameters................................................................... 12-2
Statistics (Statistics).................................................................................................................... 12-7
Enhanced Parameter Measurement (Enhanced) ..................................................................... 12-12
Notes about Automated Measurement of Waveform Parameters ............................................ 12-14
13 Zooming in on Waveforms
Turning the Zoom Windows On or Off (Display) ......................................................................... 13-1
Display Format (Format)............................................................................................................. 13-1
Displaying the Main Window (Main)............................................................................................ 13-2
Auto Scroll (Auto Scroll).............................................................................................................. 13-2
Zoom Source Waveforms (Trace)............................................................................................... 13-2
Zoom Factor (ZOOM knob)......................................................................................................... 13-2
Zoom Position (Z1 Position/Z2 Position)..................................................................................... 13-3
Vertical Zoom (Vertical Zoom)..................................................................................................... 13-3
14 Searching Waveforms
Search Source Waveform........................................................................................................... 14-1
Search Type (Type)..................................................................................................................... 14-1
Search Conditions (Condition Setup).......................................................................................... 14-3
Displaying Detected Waveforms (Display Setup) ....................................................................... 14-6
Search Range (Start/End Point) ................................................................................................. 14-6
Detected Point Number (Pattern No).......................................................................................... 14-6
Zoom Position (Z1 Position/Z2 Position)..................................................................................... 14-7
Executing a Search (Search)...................................................................................................... 14-7
15 Analyzing and Searching Serial Bus Signals
Turning the Analysis and Search Feature On or Off (Display).................................................... 15-1
Serial Bus Signal Type (Type)..................................................................................................... 15-2
Bus Setup (Setup)....................................................................................................................... 15-2
Search Setup (Search) ............................................................................................................... 15-2
Decoded Display (Decode)......................................................................................................... 15-3
Zoom Position (Z1 Position/Z2 Position)..................................................................................... 15-3
List Display (List)......................................................................................................................... 15-4
Saving the Analysis Results........................................................................................................ 15-4
Analyzing and Searching CAN Bus Signals................................................................................ 15-5
Analyzing and Searching LIN Bus Signals.................................................................................. 15-7
Contents

vi IM 710105-01E
Analyzing and Searching UART Signals................................................................................... 15-10
Analyzing and Searching I2C Bus Signals ................................................................................ 15-13
Analyzing and Searching SPI Bus Signals ............................................................................... 15-15
Analyzing and Searching FlexRay Bus Signals........................................................................ 15-17
Analyzing User-Dened Serial Bus Signals (User Dene)........................................................ 15-19
16 Displaying the Frequency Distribution of a Waveform
Turning the Histograms On or Off (Display)................................................................................ 16-1
Source Waveform (Trace)........................................................................................................... 16-1
Source Axis (Type)...................................................................................................................... 16-1
Range Setup (Range Setup)....................................................................................................... 16-1
Measurement (Measure Setup) .................................................................................................. 16-2
17 Power Supply Analysis Feature (Power Analysis Option)
Overview of the Power Supply Analysis Feature ........................................................................ 17-1
Switching Loss Analysis (SW Loss) ............................................................................................ 17-2
Safe Operating Area Analysis (SOA) .......................................................................................... 17-7
Harmonic Analysis (Harmonics).................................................................................................. 17-8
Measuring Inrush Current by Computing the Joule Integral (I2t)............................................... 17-12
18 Displaying and Searching History Waveforms
Display Mode (Mode).................................................................................................................. 18-2
Average (Average)...................................................................................................................... 18-2
Highlighting (Select No.) ............................................................................................................. 18-2
Display Range (Start/End No.).................................................................................................... 18-2
List of Timestamps (List) ............................................................................................................. 18-3
Searching History Waveforms (Search)...................................................................................... 18-3
Replay (Replay) .......................................................................................................................... 18-4
Notes about Using the History Feature....................................................................................... 18-4
19 Printing and Saving Screen Captures
Destination Type (Print To).......................................................................................................... 19-1
Printing on the Built-in Printer (BuiltIn)........................................................................................ 19-2
Printing on a USB Printer (USB)................................................................................................. 19-3
Printing on a Network Printer (Network) ..................................................................................... 19-4
Saving Screen Captures to Files (File) ....................................................................................... 19-5
Printing and Saving Screen Captures to Multiple Destinations (Multi)........................................ 19-6
20 Saving and Loading Data
Storage Media You Can Save and Load From ........................................................................... 20-1
Saving Data (Save)..................................................................................................................... 20-2
Loading Data (Load) ................................................................................................................. 20-13
File Operations (Utility) ............................................................................................................. 20-15
21 Ethernet Communication (Network Optional)
TCP/IP (TCP/IP) ......................................................................................................................... 21-2
FTP Server (FTP/Web Server) ................................................................................................... 21-3
Web Server (FTP/Web Server)................................................................................................... 21-4
Mail (Mail) ................................................................................................................................... 21-6
Network Drive (Net Drive)........................................................................................................... 21-7
Network Printer (Net Print).......................................................................................................... 21-8
SNTP (SNTP) ............................................................................................................................. 21-9
Contents

vii
IM 710105-01E
22 Other Features
Auto Setup (Auto Setup)............................................................................................................. 22-1
Returning to the Default Settings (DEFAULT SETUP)................................................................ 22-2
Snapshot (SNAP SHOT)............................................................................................................. 22-3
Clear Trace (CLEAR TRACE)..................................................................................................... 22-3
Calibration (Calibration) .............................................................................................................. 22-3
Remote Control (Remote Control) .............................................................................................. 22-4
System Conguration (System Conguration)............................................................................ 22-6
Overview (Overview)................................................................................................................... 22-9
Trigger Output (Trigger Out) ....................................................................................................... 22-9
Self-Test (Selftest)....................................................................................................................... 22-9
Index
Contents

1-1
IM 710105-01E
1 Vertical Axis (Analog Signal)
You can configure the vertical scale, vertical position, input coupling, probe attenuation, linear scaling, and
bandwidth limit settings of the CH1 through CH4 input signals.
If you are using a probe that is compatible with the DLM2000 probe interface, the DLM2000 automatically
configures the input impedance (50 Ω or 1 MΩ) and the probe attenuation.
Turning the Display On and Off (Display)
Select whether or not to display each channel’s input signal waveform.
• ON: Displays the waveform
• OFF: Does not display the waveform
Vertical Scale (SCALE)
The vertical scale is used to adjust the displayed waveform amplitude so that you can easily view signals. Set
the vertical scale by voltage per grid square (V/div) or current per grid square (A/div) on the screen.
Use the SCALE knob to set the vertical scale for each channel.
The same SCALE knob is used to adjust the scale of each channel. Press one of the CH1 to CH4 keys to select
the channel that you want to set the vertical scale for. The LED between the SCALE and POSITION knobs
illuminates in the color assigned to the selected channel (yellow, green, magenta, or cyan).
Example
1 division = 1.00 V
1 division = 0.500 V
If 1.00 V/division is changed
to 0.500 V/division
Vertical position
mark
Ground level
mark

1-2 IM 710105-01E
• If you push the SCALE knob, the FINE indicator illuminates, and you can set the vertical scale with higher
resolution.
Measurement Resolution and Effective Data Range
The DLM2000 samples input signals using an 8-bit A/D converter. The DLM2000’s effective data range is 250
levels (LSB). The DLM2000 displays waveforms using 25 levels per division on the screen. The effective data
range is ±5 divisions from the center of the screen, but only ±4 divisions can be displayed. If you move the
vertical scale position after stopping waveform acquisition, you can change the display range of the effective
data.
Vertical Scale Setting
To measure the voltage or current with high accuracy, set the vertical scale so that the input signal is
measured with the largest possible amplitude.
If you display multiple waveforms without dividing the screen so that the waveforms do not overlap (by setting
the vertical scale to a low value), then you cannot take advantage of the A/D converter’s resolution. To make
accurate measurements, divide the screen and set the waveforms’ vertical scales to a high value.
Waveform Vertical Position (POSITION)
You can move each waveform’s vertical display position within ±4 divisions.
If you change the vertical scale, the location of the vertical position mark does not change.
Use the POSITION knob to set the vertical position for each channel.
The POSITION knob is used to adjust the position of each channel. Press one of the CH1 to CH4 keys to select
the channel that you want to set the vertical position for. The LED between the SCALE and POSITION knobs
illuminates in the color assigned to the selected channel (yellow, green, magenta, or cyan).
Position 2.00 div
Position –3.00 div
Position 0.00 div
Vertical position
mark
If you change the vertical position after stopping signal acquisition, the data that exceeds the measurement
range is handled as overflow data.
1 Vertical Axis (Analog Signal)

1-3
IM 710105-01E
Input Coupling (Coupling)
You can choose how the vertical control circuit (voltage axis) is coupled to the analog signal.
You can set the input coupling to one of the available settings below.
AC
Displays only the AC component of the input signal. The input impedance is 1 MΩ.
DC
Displays both the AC and DC components of the input signal. The input impedance is 1 MΩ.
DC50
Displays both the AC and DC components of the input signal. The input impedance is 50 Ω. Be careful because
the maximum input voltage (current) is reduced.
GND
Displays the ground level, not the input signal.
1 MΩ
DC
50 Ω
DC50Ω
1 MΩ
AC
GND
Vertical control
circuit
Vertical control
circuit
Vertical control
circuit
Vertical control
circuit
Input
terminal
Input
terminal Input
terminal
Input
terminal
Probe Attenuation (Probe)
To use a probe, you must align the DLM2000’s attenuation setting with the probe attenuation so that voltage or
current values and scale values are displayed correctly. Set an appropriate attenuation for the probe.
Probe Type (Type)
Select the type of probe that you want to set the attenuation of from one of the settings below.
• Voltage: Voltage probe
• Current: Current probe
Attenuation (Attenuation)
Set the attenuation to one of the settings below.
For voltage probes
0.001:1, 0.002:1, 0.005:1, 0.01:1, 0.02:1, 0.05:1, 0.1:1, 0.2:1, 0.5:1, 1:1, 2:1, 5:1, 10:1, 20:1, 50:1, 100:1, 200:1,
500:1, 1000:1, or 2000:1
For current probes
0.001A:1V, 0.002A:1V, 0.005A:1V, 0.01A:1V, 0.02A:1V, 0.05A:1V, 0.1A:1V, 0.2A:1V,
0.5A:1V, 1A:1V, 2A:1V, 5A:1V, 10A:1V, 20A:1V, 50A:1V, 100A:1V, 200A:1V, 500A:1V, 1000A:1V, or 2000A:1V
• Using a probe has the following advantages.
Prevents disturbing the voltage and current of the circuit being measured.
Allows signals to be applied with no distortion.
Expands the voltage range that the DLM2000 can measure.
1 Vertical Axis (Analog Signal)

1-4 IM 710105-01E
Automatic Zero Adjustment of Current Probes (Probe Zero Cal)
You can perform automatic zero adjustment on a current probe when all of the following conditions are met.
• A current probe that is compatible with the DLM2000 probe interface is connected to the input terminal.
• The input coupling is set to DC.
An error may occur when automatic zero adjustment is executed if the current probe’s residual offset is large.
If this happens, adjust the current probe’s residual offset to zero.
Demagnetization and Automatic Zero Adjustment of Current Probes
(DEMAG and Zero Cal)
You can demagnetize and perform automatic zero adjustment on a current probe when all of the following
conditions are met.
• A current probe with a YOKOGAWA probe interface (PBC100 or PBC050) is connected to the input terminal.
• The input coupling is set to DC.
When you demagnetize and perform automatic zero adjustment on a current probe, do not clamp the
conductor. If you demagnetize a current probe while the conductor is clamped, the current that flows through
the conductor as a result of demagnetization may damage components of the DUT circuitry.
Deskew (Deskew)
The deskew feature allows you to view signals by correcting the time offsets (skew) between the CH1 to CH4
signals, which is caused by the use of different types of probes. You can deskew each channel separately.
Selectable range: −100.0 ns to 100.0 ns in 0.01-ns steps
Inverted Waveform Display (Invert)
This feature inverts the waveform display around the vertical position. Only the display is inverted. Cursor
measurements, automated measurement of waveform parameters, and computation are performed on the
original waveform. Triggers also operate based on the original waveform.
Linear Scaling (Linear Scale)
Using specified scaling coefficient A and offset B, the DLM2000 performs the following computation to scale
cursor measurement values and automated measurement values of waveform parameters. You can assign units
to the scaled values.
This feature can be used to multiply the measured value by an external voltage divider’s voltage-divider ratio or
to convert measured voltage into current values.
Y (unit) = AX + B
X: Value before scaling
Y: Value after scaling
Turning Linear Scaling On and Off (Mode)
Sets whether or not to use linear scaling.
• ON: Uses linear scaling
• OFF: Does not use linear scaling
1 Vertical Axis (Analog Signal)

1-5
IM 710105-01E
Unit (Unit)
You can set the unit using up to four alphanumeric characters.
Scaling Coefficient A and Offset B
The selectable ranges for scaling coefficient A and offset B are as follows:
Selectable Range of A and B −9.9999E+30 to +9.9999E+30
Default Setting A 1.0000E+00
B 0.0000E+00
Label Display (Label)
You can assign labels to channels using up to eight characters.
Turning Labels On and Off (Display)
• ON: Displays labels
• OFF: Does not display labels
Label (Name)
You can set the label when the label display is turned on.
Bandwidth (Bandwidth)
You can set bandwidth limitations on the analog signals by specifying a cutoff frequency.
You can view signals with frequency components above the specified frequency removed.
Set the cutoff frequency to one of the settings below.
FULL (no bandwidth limit), 200 MHz, 100 MHz, 20 MHz, 10 MHz, 5 MHz, 2 MHz, 1 MHz, 500 kHz, 250 kHz, 125
kHz, 62.5 kHz, 32 kHz, 16 kHz, or 8 kHz
When high-resolution mode is ON, the bandwidth limit is set to 200 MHz even if you set the bandwidth limit to
FULL.
Offset (Offset)
If you set an offset when measuring an analog signal that is riding on top of a given voltage (or current), the
given voltage (or current) is subtracted from the input signal. This allows you to only view the changes in the
signal at a higher vertical scale setting.
You can set the offset for each channel.
Selectable Range for Voltage
Voltage Scale (With probe = 1:1) Selectable Offset Voltage Range
2 mV/division to 50 mV/division −1.0 V to 1.0 V
0.1 V/division to 0.5 V/division −10.0 V to 10.0 V
(–5.0 V to 5.0 V when the input coupling is
set to DC50)
1 V/division to 10 V/division −100.0 V to 100.0 V
You can set the offset in 0.01-division steps. For 2 mV/division, you can set the offset in 0.02-mV steps.
Resetting the Offset
Press the RESET key to set the offset value to 0 V.
1 Vertical Axis (Analog Signal)

1-6 IM 710105-01E
Offset Cancel (Offset Cancel)
You can set whether or not to apply the specified offset to various measured values.
The offset-cancel feature ON/OFF setting applies to all channels. The default setting is off.
• ON
Applies the specified offset to the result of cursor measurements, computations, and automated measurement
of waveform parameters. The offset is subtracted from the input signal, and various measurements are
performed. The vertical position is set to zero.
•OFF
Does not apply the specified offset to the result of cursor measurements, computations, and automated
measurement of waveform parameters. The offset is not subtracted from the input signal, and various
measurements are performed. The vertical position on the screen corresponds to the offset.
Vertical position mark
Ground level mark
When Offset Cancel is set OFF
When Offset Cancel is set ON
1.00 V/division
Offset 0.00 V
Position 0.00 divisions
1.00 V/division
Offset –2.00 V
Position 0.00 divisions
0.500 V/division
Offset –2.00 V
Position 0.00 divisions
• The offset setting applies to all input coupling settings (AC, DC, DC50, and GND).
• If you change the probe attenuation, the vertical scale settings change the values that have been scaled
with the new attenuation ratio.
• The offset value does not change even if you change the voltage scale. However, if the offset value goes
outside the selectable range, the offset is set to the maximum or minimum value in the vertical scale range.
If you do not change the offset and set the vertical scale back to its original value, the offset returns to its
original value.
1 Vertical Axis (Analog Signal)

2-1
IM 710105-01E
2 Vertical Axis (Logic Signal)
You can turn the bus display on and off and how to set the vertical display range, threshold, and other settings of
a logic input signal (LOGIC).
You can apply logic signals to the front-panel 8-bit logic signal input port.
Turning the Display On and Off (Display)
Set whether or not to display the logic signal waveform. When you turn the display on, the DLM2000 displays the
logic signal waveform in the CH4 waveform display area.
• ON: Displays the waveform
• OFF: Does not display the waveform
Vertical Display Range (SCALE)
You can set the logic signal’s vertical display range to one of three levels.
Press LOGIC so that the key illuminates, and then use the SCALE knob to set the vertical display range.
Vertical Position (POSITION)
You can move the logic signal’s vertical display position within ±4 divisions.
Press LOGIC so that the key illuminates, and then use the POSITION knob to set the vertical display position.
Setting the Bits (Bit Setup)
For each bit from Bit0 to Bit7, turn the display on or off (Display), and set the label (Bit Name) and threshold level
(Level).
Configuring the Display (Display Setup)
Bus Display (Bundle)
Bus display can be used to show Bit0 through Bit7. When turned on, the bus display shows the logic signal
according to the specified format (Format) and bit order (Bit Order).
• ON: Turns the bus display on
• OFF: Turns the bus display off
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
2E 2F Bus display (Hex)
Format (Format)
Selects the format for showing the bus display.
• Bin: Displays the bus display in binary notation
• Hex: Displays the bus display in hexadecimal notation
Bit Order (Bit Order)
Selects the bit order for showing the bus display. This setting also applies to the bit order for cursor
measurement.
• Bit7...Bit0: Bit7 is the MSB, and Bit0 is the LSB.
• Bit0...Bit7: Bit0 is the MSB, and Bit7 is the LSB.

2-2 IM 710105-01E
State Display (State)
Displays logic signal data sampled at the specified clock source edge. Even if the logic signal changes, the state
is held until the clock source edge changes.
You can turn the state display on and off. If you turn the state display on, set the clock source and the polarity.
Clock Source (Clock)
You can select from one of the settings below.
•CH1 to CH3
• LOGIC (Bit0 to Bit7)
Detection Level (Threshold)
Set the level used to detect edges. You can set the detection level when the clock source is a channel from CH1
to CH3.
Selectable range: ±5 divisions
Hysteresis (Hysteresis)
Set a width to the detection level so that the DLM2000 does not detect edges on small fluctuations in the signal.
You can set the detection level when the clock source is a channel from CH1 to CH3.
Selectable range: 0.0 to 4.0 divisions
Resolution: 0.1 divisions
Clock Source Polarity (Polarity)
Select the clock source polarity.
When the level changes from low to high.
When the level changes from high to low.
When the level changes from low to high or from high to low.
State Display Example
Clock source
(Polarity: )
State display
Input signal
Repetitive high-frequency pulse
Unknown area
• You cannot use MATH2/REF2 when the state display is on.
• When the clock source is set to LOGIC, the waveform of the state display is the same as that of the source
bit waveform.
Noise Rejection (Noise Rejection)
The DLM2000 sets a width (hysteresis) on the threshold level so that high and low states do not change if the
level only changes within this range.
If you are using Model 701989, set the hysteresis to one of the settings below.
Approx. 100 mV*of hysteresis around the threshold level
Approx. 250 mV*of hysteresis around the threshold level
* The above values are approximate values. They are not strictly warranted.
The hysteresis is fixed on the following logic probes.
• Model 701890: Approx. 80 mV
•Model 701981: Approx. 50 mV
• Model 701988: Approx. 80 mV
2 Vertical Axis (Logic Signal)

2-3
IM 710105-01E
Setting the Threshold Level for Each Bit (Threshold Type)
Selects whether or not to set the threshold level separately for each bit.
• All: For setting a common threshold level for all bits.
• Each: For setting the threshold level separately for each bit
When you connect one of the following logic probes to the DLM2000, the threshold type is automatically set.
• Model 701980, 701981, or 701988: All (fixed)
• Model 701989: Each (you can select All or Each)
Threshold Level (Threshold)
Set the threshold level used to detect whether the logic signal is high or low. Selecting one of the following
presets automatically sets the threshold level.
CMOS(5V) 2.5 V
CMOS(3.3V) 1.6 V
CMOS(2.5V) 1.2 V
CMOS(1.8V) 0.9 V
ECL −1.3 V
The selectable range varies depending on the logic probe that you use.
• Model 701980: ±40 V (0.1-V resolution)
• Model 701981: ±10 V (0.1-V resolution)
• Model 701988: ±40 V (0.05-V resolution)
• Model 701989: ±6 V (0.05-V resolution)
Deskew (Deskew)
The deskew feature allows you to view signals by correcting the time offsets (skew) between the logic signal and
other signals, which are caused by the use of different types of probes. Logic signal deskewing is performed on
all eight bits collectively.
Selectable range: −100.0 ns to 100.0 ns in 0.01-ns steps
2 Vertical Axis (Logic Signal)

3-1
IM 710105-01E
3 Horizontal Axis (Time Axis)
Time Axis Setting (TIME/DIV)
The time axis scale is set as a length of time per grid division. You can adjust the amount of time that you want to
display waveforms for by setting the time axis. Because the horizontal display range is 10 divisions, the amount
of time displayed is equal to the TIME/DIV setting × 10. The selectable range is 1 ns/division to 500 s/division.
1 division = 500 µs
10 divisions = 5 ms 10 divisions = 10 ms
1 division = 1 ms
Relationship between the Time Axis Setting, Record Length, and Sample Rate
The relationship between the time axis setting, record length, and sample rate is as follows:
When the record length and the time axis are set so that the sample rate is at the maximum rate, if you decrease
the time axis setting, the record length is reduced.
Sample rate = Record length/(time axis setting [s/division] × 10 [divisions])
Time Axis Setting and Roll Mode Display
When the following conditions are true, if you set the time axis to one of the settings in the following table, the
DLM2000 display switches to roll mode.
•The acquisition mode is not set to Average.
• The trigger mode is Auto, Auto Level, or Single.
Record Length Time Axis Setting
1.25 Mpoints or less 100 ms/division to 500 s/division
6.25 Mpoints 500 ms/division to 500 s/division
12.5 Mpoints 500 ms/division to 500 s/division
25 Mpoints 1 s/division to 500 s/division
62.5 Mpoints 5 s/division to 500 s/division
125 Mpoints 5 s/division to 500 s/division

3-2 IM 710105-01E
Roll Mode Display
In roll mode, the displayed waveform is not updated using triggers. Rather, the oldest data is deleted as new
data is acquired, and the waveform flows from the right to the left of the screen. This mode is useful for observing
low-frequency signals or signals that change slowly.
About the roll-mode display
• The display is set to roll mode when the trigger mode is set to Single, but the roll mode display stops when
the DLM2000 triggers.
• If the record length is 1.25 Mpoints or longer, measured time values appear after you stop waveform
acquisition using the RUN/STOP key.
• If the record length is set such that waveform acquisition operates in Single mode (6.25 Mpoints or longer
for models without a memory option), automatically measured values of waveform parameters appear
when the roll mode display stops.
• When the trigger mode is set to Single, the DLM2000 will not display computed waveforms (MATH
waveforms) while it is acquiring waveforms. The DLM2000 will display computed waveforms after it triggers
and the roll mode display stops.
• The DLM2000 will not display computed waveforms (MATH waveforms) that have been generated through
user-defined computation while it is acquiring waveforms. The DLM2000 will display the computed
waveforms after it stops acquiring waveforms.
3 Horizontal Axis (Time Axis)

4-1
IM 710105-01E
4 Triggering
A trigger is a cue used to display the waveform on the screen. A trigger occurs when the specified trigger
condition is met, and a waveform is displayed on the screen.
Trigger Mode (Trigger Mode)
The trigger mode determines the conditions for updating the displayed waveforms. There are four trigger modes.
Auto Mode (Auto)
If the trigger conditions are met before a 100-ms timeout, the DLM2000 updates the displayed waveforms on
each trigger occurrence. If not, the DLM2000 automatically updates the displayed waveforms. If the time axis is
set to a value that would cause the display to switch to roll mode, roll mode display will be enabled.
Auto Level Mode (Auto Level)
If a trigger occurs before a timeout, the DLM2000 updates the waveform in the same way as Auto mode.
If a trigger does not occur, the DLM2000 detects the center value of the trigger source amplitude, automatically
changes the trigger level to the center value, triggers on that value, and updates the displayed waveform. Auto
Level mode is valid when the trigger source is set to a channel from CH1 to CH4. For all other cases, Auto Level
mode operates in the same way as Auto mode.
If the time axis is set to a value that would cause the display to switch to roll mode, roll mode display will be
enabled.
Normal Mode (Normal)
The DLM2000 only updates the waveform display when the trigger conditions are met. If no triggers occur, the
display is not updated. If you want to view waveforms that the DLM2000 cannot trigger on, or if you want to
check the ground level, use Auto mode.
N Single Mode (N Single)
The DLM2000 acquires waveforms each time the trigger conditions are met until a specified number of
waveforms have been acquired, and then displays all of the acquired waveforms. If no triggers occur, the display
is not updated.
Single Mode
When the trigger conditions are met, the DLM2000 updates the displayed waveform once and stops waveform
acquisition. When you press SINGLE on the front panel, the DLM2000 acquires waveforms in Single mode.
• The trigger mode setting applies to all trigger types.
• The trigger conditions that were used to acquire the displayed waveform appear at the upper right of the
screen.
• If you set the trigger mode to Auto when using a trigger combination, the timeout only applies to the trigger
A trigger conditions.