VOLTCRAFT PLUS DSO 4022 User manual

TABLE OF CONTENTS
2
Table of Contents
SAFETY INSTRUCTION ...................................6
Safety Symbols.......................................................................6
Safety Guidelines ...................................................................7
Power cord for the United Kingdom......................................9
GETTING STARTED .......................................10
Main Features....................................................................10
Panel Overview..................................................................11
Front Panel...........................................................................11
Rear Panel ............................................................................14
Display..................................................................................15
Setting up the Oscilloscope...............................................16
QUICK REFERENCE.......................................18
Menu Tree and Shortcuts...................................................18
Acquire key...........................................................................18
Autoset key...........................................................................19
CH1/2 key.............................................................................19
Cursor key 1/2......................................................................19
Cursor key 2/2......................................................................20
Display key ...........................................................................20
Hardcopy key........................................................................21
Help key................................................................................21
Horizontal menu key............................................................21
Math key 1/2........................................................................22
Math key 2/2........................................................................22
Measure key.........................................................................23
Run/Stop key........................................................................23
Save/Recall key 1/9..............................................................24
Save/Recall key 2/9..............................................................24
Save/Recall key 3/9..............................................................25
Save/Recall key 4/9..............................................................25
Save/Recall key 5/9..............................................................26
Save/Recall key 6/9..............................................................26
Save/Recall key 7/9..............................................................27
Save/Recall key 8/9..............................................................27
Save/Recall key 9/9..............................................................28
Trigger key 1/4 .....................................................................28

TABLE OF CONTENTS
3
Trigger key 2/4......................................................................29
Trigger key 3/4......................................................................29
Trigger key 4/4......................................................................30
Utility key 1/4........................................................................30
Utility key 2/4........................................................................31
Utility key 3/4........................................................................31
Utility key 4/4........................................................................31
Default Settings.................................................................32
Built-in Help......................................................................33
MEASUREMENT............................................34
Basic Measurements .........................................................34
Activating a channel.............................................................34
Using the Autoset.................................................................35
Running and stopping the trigger........................................36
Changing the horizontal position and scale........................37
Changing the vertical position and scale.............................38
Using the probe compensation signal.................................39
Automatic Measurements..................................................41
Measurement items.............................................................41
Automatically measuring the input signals.........................43
Cursor Measurements.......................................................44
Using the horizontal cursors ...............................................44
Using the vertical cursors....................................................45
Math Operations...............................................................46
Overview...............................................................................46
Adding or subtracting signals..............................................47
Using the FFT function........................................................48
CONFIGURATION .........................................49
Acquisition........................................................................49
Selecting the acquisition mode............................................49
Real time vs Equivalent time sampling mode.....................51
Display..............................................................................52
Selecting the vector or dot drawing.....................................52
Accumulating the waveform................................................52
Adjusting the display contrast.............................................53
Selecting the display grid.....................................................53
Horizontal View.................................................................54
Moving the waveform position horizontally........................54
Selecting the horizontal scale..............................................54
Selecting the waveform update mode.................................55
DSO-4000 User Manual
4
Zooming the waveform horizontally ...................................56
Viewing waveforms in the X-Y mode...................................57
Vertical View (Channel) .....................................................58
Moving the waveform position vertically ............................58
Selecting the vertical scale...................................................58
Selecting the coupling mode...............................................58
Inverting the waveform vertically.........................................59
Limiting the waveform bandwidth.......................................59
Selecting the probe attenuation level..................................60
Trigger...............................................................................61
Trigger type ..........................................................................61
Trigger parameter ................................................................61
Configuring the edge trigger................................................63
Configuring the video trigger...............................................65
Configuring the pulse width trigger.....................................66
Manually triggering the signal.............................................68
Remote Control Interface...................................................69
System Settings.................................................................70
Viewing the system information..........................................70
Selecting the language.........................................................70
SAVE/RECALL................................................71
File Structures...................................................................71
Display image file format.....................................................71
Waveform file format...........................................................71
Setup file format ..................................................................73
Using the SD card file utilities.............................................74
Quick Save (HardCopy).....................................................76
Save...................................................................................78
File type/source/destination................................................78
Saving the panel settings.....................................................79
Saving the waveform............................................................80
Saving the display image.....................................................81
Saving all (panel settings, display image, waveform).........82
Recall ................................................................................84
File type/source/destination................................................84
Recalling the default panel settings.....................................84
Recalling a reference waveform to the display....................86
Recalling panel settings.......................................................87
Recalling a waveform...........................................................88

TABLE OF CONTENTS
5
MAINTENANCE.............................................90
Vertical Resolution Calibration ..........................................90
Probe Compensation.........................................................91
FAQ...............................................................93
The input signal does not appear in the display. ................93
I want to remove some contents from the display..............93
The waveform does not update (frozen).............................93
The probe waveform is distorted.........................................94
Autoset does not catch the signal well................................94
I want to clean up the cluttered panel settings. ..................94
The saved display image is too dark on the background....94
The accuracy does not match the specifications.................94
The SD card slot does not accept my card..........................94
APPENDIX.....................................................95
Fuse Replacement .............................................................95
DSO-4000 Series Specifications.........................................96
Model-specific specifications...............................................96
Common specifications.......................................................97
Probe Specifications..........................................................99
DSO-4022/4042 Probe.........................................................99
DSO-4062/4102 Probe.........................................................99
Declaration of Conformity ...............................................100
INDEX .........................................................101
DSO-4000 User Manual
6
SAFETY INSTRUCTION
This chapter contains important safety instructions
that should be followed when operating and
storing the oscilloscope. Read the following before
any operation to ensure your safety and to keep
best condition for the oscilloscope.
Safety Symbols
These safety symbols may appear in this manual or on the
oscilloscope.
WARNING Warning: Identifies conditions or practices that
could result in injury or loss of life.
CAUTION Caution: Identifies conditions or practices that
could result in damage to the oscilloscope or to
other objects or property.
DANGER High Voltage
Attention: Refer to the Manual
Protective Conductor Terminal
Earth (Ground) Terminal

7
Safety Guidelines
General
Guideline
CAUTION
•Make sure the BNC input voltage does not
exceed 300V peak.
•Never connect a hazardous live voltage to the
ground side of the BNC connectors. It might
lead to fire and electric shock.
•Do not place heavy objects on the oscilloscope.
•Avoid severe impacts or rough handling that
may damage the oscilloscope.
•Avoid discharges of static electricity on or near
the oscilloscope.
•Use only mating connectors, not bare wires, for
the terminals.
•Do not block the cooling fan opening.
•Do not perform measurement at power source
and building installation site (Note below).
•The oscilloscope should only be disassembled
by a qualified technician.
(Measurement categories) EN 61010-1:2001 specifies the
measurement categories and their requirements as follows. The
DSO-4000 falls under category II.
•Measurement category IV is for measurement performed at the
source of low-voltage installation.
•Measurement category III is for measurement performed in the
building installation.
•Measurement category II is for measurement performed on the
circuits directly connected to the low voltage installation.
•Measurement category I is for measurements performed on
circuits not directly connected to Mains.
Power Supply
WARNING
•AC Input voltage: 100 ~ 240V AC, 47 ~ 63Hz
•The power supply voltage should not fluctuate
more than 10%.
•Connect the protective grounding conductor of
the AC power cord to an earth ground.
DSO-4000 User Manual
8
Fuse
WARNING
•Fuse type: T1A/250V
•To ensure fire protection, replace the fuse only
with the specified type and rating.
•Disconnect the power cord before replacing the
fuse.
•Make sure the cause of fuse blowout is fixed
before replacing the fuse.
Cleaning the
oscilloscope •Disconnect the power cord before cleaning the
oscilloscope.
•Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid
into the oscilloscope.
•Do not use chemical containing harsh products
such as benzene, toluene, xylene, and acetone.
Operation
Environment •Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
•Relative Humidity: < 80%
•Altitude: < 2000m
•Temperature: 0°C to 50°C
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. the oscilloscope falls under
degree 2.
Pollution refers to “addition of foreign matter, solid, liquid, or
gaseous (ionized gases), that may produce a reduction of dielectric
strength or surface resistivity”.
•Pollution degree 1: No pollution or only dry, non-conductive
pollution occurs. The pollution has no influence.
•Pollution degree 2: Normally only non-conductive pollution
occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
•Pollution degree3: Conductive pollution occurs, or dry, non-
conductive pollution occurs which becomes conductive due to
condensation which is expected. In such conditions, equipment
is normally protected against exposure to direct sunlight,
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.

9
Storage
environment •Location: Indoor
•Relative Humidity: < 85%
•Temperature: 0°C to 50°C
Power cord for the United Kingdom
When using the oscilloscope in the United Kingdom, make sure the
power cord meets the following safety instructions.
NOTE: This lead/appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the
following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in main leads may not correspond with the
colours marking identified in your plug/appliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the Earth
terminal marked with the letter E or by the earth symbol or coloured Green
or Green & Yellow.
The wire which is coloured Blue must be connected to the terminal which is
marked with the letter N or coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal marked
with the letter L or P or coloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or contact
the supplier.
This cable/appliance should be protected by a suitably rated and approved
HBC mains fuse: refer to the rating information on the equipment and/or
user instructions for details. As a guide, cable of 0.75mm2 should be
protected by a 3A or 5A fuse. Larger conductors would normally require 13A
types, depending on the connection method used.
Any moulded mains connector that requires removal /replacement must be
destroyed by removal of any fuse & fuse carrier and disposed of immediately,
as a plug with bared wires is hazardous if a engaged in live socket. Any re-
wiring must be carried out in accordance with the information detailed on
this label.
DSO-4000 User Manual
10
GETTING STARTED
The Getting started chapter introduces the
oscilloscope’s main features, appearance, and set
up procedure.
Main Features
Model name Frequency bandwidth Input channels
DSO-4022 DC – 25MHz (–3dB) 2
DSO-4042 DC – 40MHz (–3dB) 2
DSO-4062 DC – 60MHz (–3dB) 2
DSO-4102 DC – 100MHz (–3dB) 2
Performance •250MSa/S real-time sampling rate
•25GS/s equivalent-time sampling rate
•Up to 10ns peak detection
Feature •5.6 inch color TFT display
•Saving and recalling setups and waveforms
•19 automatic measurements
•Multi-language menu
•Math operation: Add, Subtract, FFT
•Edge, video, pulse width trigger
•Compact size: (W) 310 x (D) 140 x (H) 142 mm
Interface •SD card connector for saving and recalling data
•Calibration output
•External trigger input

11
Panel Overview
Front Panel
LCD display TFT color, 320 x 234 resolution, wide angle view
LCD display.
Function keys:
F1 (top) to
F5 (bottom) Activates the functions which
appear in the left side of the LCD
display.
Variable knob
V
A
RIABL
E
Increases or decreases value and
moves to the next or previous
parameter.
Acquire key
A
cquire
Configures the acquisition mode
(page49).
Display key
Display
Configures the display settings
(page52).
Cursor key
Cursor
Runs cursor measurements
(page44).
(Continued on next page)
DSO-4000 User Manual
12
Utility key
Utility
Configures the Hardcopy function
(page76), shows the system status
(page68), selects the menu
language (page70), runs the self
calibration (page90), and configures
the probe compensation
signal(page91).
Help key
Help
Shows the Help contents on the
display (page33).
Autoset key
A
utoset
Automatically configures the
horizontal, vertical, and trigger
settings according to the input
signal (page35).
Measure key
Measure
Configures and runs automatic
measurements (page41).
Save/Recall key
Save/Recal
l
Saves and recalls image, waveform,
or panel settings (page71).
Hardcopy key
Hardcop
y
Copies image, waveform, or panel
settings to an SD card (page76).
Run/Stop key
Run/Stop
Runs or stops triggering (page36).
Trigger level knob
LEV E L
TRIGGE
R
Sets the trigger level (page61).
Trigger menu key
MENU
Configures the trigger settings
(page61).
Single trigger key
SINGLE
Selects the single trigger mode
(page68).
Trigger force key
FORCE
Acquires the input signal once
regardless of the trigger condition
at the time (page68).
Horizontal menu
key
MENU
Configures the horizontal view
(page54).

13
Horizontal
position knob Moves the waveform horizontally
(page54).
TIME/DIV knob
TIME/DIV
Selects the horizontal scale
(page54).
Vertical position
knob Moves the waveform vertically
(page58).
CH1/CH2 key
CH 1
Configures the vertical scale and
coupling mode for each channel
(page58).
VOLTS/DIV knob
VOLTS/DI
V
Selects the vertical scale (page58).
Input terminal
CH1
Accepts input signals: 1MΩ±2%
input impedance, BNC terminal.
Ground terminal
Accepts the DUT ground lead to
achieve a common ground.
MATH key
M
A
T
H
Performs math operations (page46).
SD card
connector
Facilitates transferring waveform
data, display image, and panel
settings (page71).
Probe
compensation
output
Outputs a 2Vp-p, square signal for
compensating the probe (page91)
or demonstration.
External trigger
input
EXT TRI
G
Accepts an external trigger signal
(page61).
Power switch
Powers the oscilloscope on or off.
DSO-4000 User Manual
14
Rear Panel
LI NE VOLTAGE
AC 100 240V
FUSE RATING
RANGE
T1A 2 50V
FREQUENCY 50 60Hz
POWER MAX. 18W 40VA
Power cord
socket
Fuse socket
Power cord socket accepts the AC
mains, 100 ~ 240V, 50/60Hz.
Fuse socket holds the AC main
fuse, T1A/250V.
For fuse replacement procedure,
see page95.
USB slave port
Accepts a type B (slave) male USB
connector for remote controlling
the oscilloscope (page69).
Calibration
output
Outputs the calibration signal used
in vertical scale accuracy calibration
(page90).

15
Display
Waveform marker
Vertical status Horizontal status Frequency Trigger condition
Waveform position Trigger status Acquisition
Menu
Waveforms Channel 1: Yellow Channel 2: Blue
Trigger status Trig’d A signal is being triggered
Trig?
Waiting for a trigger condition
Auto
Updating the input signal
regardless of trigger conditions
STOP
Triggering is stopped
For trigger setting details, see page61.
Updates the input signal frequency (the trigger
source signal) in real-time.
Input signal
frequency
“< 20Hz” Indicates that the signal frequency is less
than the lower frequency limit (20Hz) and thus not
accurate.
Trigger
configuration Shows the trigger source, type, and slope. In case
of the Video trigger, shows the trigger source and
polarity.
Horizontal status
Vertical status
Shows the channel configurations: coupling mode,
vertical scale, and horizontal scale.
DSO-4000 User Manual
16
Setting up the Oscilloscope
Background This section describes how to set up the
oscilloscope properly including connecting a
signal, adjusting the scale, and compensating the
probe. Before operating the oscilloscope in a new
environment, run these steps to make sure the
oscilloscope is functionally stable.
Procedure 1. Connect the power cord.
2. Press the power switch. The
display will become active
in approximately 10
seconds.
3. Reset the system by recalling
the factory settings. Press
the Save/Recall key, then
Default Setup. For details of
factory settings, see page32.
4. Connect the probe between the Channel1 input
terminal and probe compensation signal output
(2Vp-p, 1kHz square wave).
5. Set the probe attenuation to x10.
CH1
x
1
x
10

17
6. Press the Autoset key. A
square waveform will
appear in the center of the
display. For details of the
Autoset, see page35.
7. Press the Display key, then
Type and select the vector
waveform.
8. Turn the adjustment point on the probe to
flatten the square waveform edge.
Over
Compensation Normal Under Compensation
9. Setting up the oscilloscope is completed. You
may continue with the other operations.
Measurements: page34 Configurations: page49
DSO-4000 User Manual
18
QUICK REFERENCE
This chapter lists the oscilloscope menu tree,
operation shortcuts, built-in help coverage, and
default factory settings. Use this chapter as a
handy reference to access the oscilloscope
functionalities.
Menu Tree and Shortcuts
Normal = Press the functional key for “Normal”
Average = Repeatedly press the functional key for
“Average”
Normal ~ Average = Select a menu from “Normal” to “Average” and
press its functionality key
Normal→VAR = Press the functionality key for “Normal”, and
then use the Variable knob
Acquire key
Select acquisition mode
Normal ~ Peak-Detect
Select average number
Average
Normal
Peak
Detect
2/ 4/ 8/ 16/ 32/
64/ 128/ 256
Average
Sample Rate
Acquire

19
Autoset key
Automatically find signal
and set scale
Autoset
CH1/2 key
Turn channel on/off
CH 1/2
Select coupling mode
Coupling
Invert waveform
Invert
Turn bandwidth limit on/off
BW Limit
Select probe attenuation factor
On/ Off
/ /
On/ Off
(GDS-1102/1062)
x1/ x10/ x100
Coupling
Invert
Off
BW Limit
Off
Probe
x1
CH 1
Probe
Cursor key 1/2
Turn cursor on/off
Cursor
Move X1 cursor
X1→VAR
Move X2 cursor
X2→VAR
Move both X1 and X2 cursor
X1X2→VAR
Switch to Y cursor
X↔Y
DSO-4000 User Manual
20
Cursor key 2/2
Turn cursor on/off
Cursor
Move Y1 cursor
Y1→VAR
Move Y2 cursor
Y2→VAR
Move both Y1 and Y2 cursor
Y1Y2→VAR
Switch to X cursor
X↔Y
Display key
Select waveform type
Type
Waveform accumulate On/Off
Accumulate
Refresh accumulation
Refresh
Set display contrast
Contrast→VAR
Select display grid

21
Hardcopy key
→See Utility key (page30)
Help key
Turn help mode on/off
Help
Horizontal menu key
Select main (default) display
Main
Select window mode
Window→TIME/DIV
Zoom in window mode
Window Zoom
Select window roll mode
Roll
Select XY mode
XY
DSO-4000 User Manual
22
Math key 1/2
Math on/off
Math
Select math operation type (+/–)
Operation
Select addition/subtraction
CH1+/-CH2
Set result position
Position→VAR
Math result Volt/Div
Unit/Div→VAR
Math key 2/2
Math on/off
Math
Select math operation type (FFT)
Operation
Select FFT source channel
Source
Select FFT window
Window
Select FFT result position
Position→VAR
Select vertical scale
Unit/Div

23
Measure key
Turn on/off measurement Measure
Select measurement type Voltage/Time
Select measurement item VAR or Icon
Go back to previous menu Previous Menu
Run/Stop key
Freeze/unfreeze waveform or trigger
Run/Stop
DSO-4000 User Manual
24
Save/Recall key 1/9
Switch to Save or Recall menu Save/Recall
Recall default setup Default Setup
Save/Recall key 2/9
Select other menu
Recall Setup
Select setup source
Source →VAR
Recall setup
Recall
Go to SD card file utilities
Recall
Setup
Recall
File
Utilities
(SD Card only)
To File Utilities
Recall Setup
Source
Memory Memory/SD Card
File Utilities

25
Save/Recall key 3/9
Select other menu
Recall Waveform
Select waveform source
Source →VAR
Select waveform destination
Destination→VAR
Recall waveform
Recall
Go to SD card file utilities
File Utilities
Save/Recall key 4/9
Select other menu
Display Refs.
Turn ref. waveform A on/off
Ref.A
Turn ref. waveform B on/off
Ref.B
DSO-4000 User Manual
26
Save/Recall key 5/9
Select other menu
Save Setup
Select destination
Destination →VAR
Save setup
Save
Go to SD card file utilities
File Utilities
Save/Recall key 6/9
Select other menu
Save Waveform
Select source
Source →VAR
Select destination
Destination →VAR
Save waveform
Save
Go to SD card file utilities
Save
Waveform
Source
Save
File
Utilities
Save Waveform
Destination
Memory Memory/SD Card/
Refs.
(SD Card only)
To File Utilities
CH1/2/Math
Ref A/B
File Utilities

27
Save/Recall key 7/9
Select other menu
Save Image
Turn on/off ink saver
Ink Saver
Save image
Save
Go to SD card file utilities
File Utilities
Save/Recall key 8/9
Select other menu
Save All
Turn on/off ink saver
Ink Saver
Save all
Save
Go to SD card file utilities
File Utilities
DSO-4000 User Manual
28
Save/Recall key 9/9
Select file/folder
VAR →Select
Create or rename folder/file
New Folder/Rename
VAR →Enter character /
Backspace / Save / Previous menu
Delete folder/file
Delete
Go to previous menu
Previous menu
Trigger key 1/4
Select video trigger type
Type
Select trigger source
Source
Select video standard
Standard
Select video polarity
Polarity
Select video field/line
Line →VAR

29
Trigger key 2/4
Select edge trigger type
Edge
Select trigger source
Source
Go to slope/coupling menu
(page30)
Slope/Coupling
Select trigger mode
Mode
Trigger key 3/4
Select pulse trigger type
Type
Select trigger source
Source
Select pulse tri
gg
er condition and
pulse width
When →VAR
Go to slope/coupling menu
(page30)
Slope/Coupling
Select trigger mode
Mode
DSO-4000 User Manual
30
Trigger key 4/4
Select trigger slope type
Slope
Select trigger coupling mode
Coupling
Select frequency rejection
Rejection
Turn noise rejection on/off
Noise Rej
Go back to previous menu
Previous Menu
Utility key 1/4
Go to hardcopy menu
Hardcopy
Go to probe compensation menu
ProbeComp
Select language
Language
Show system information
System Info.
Go to self calibration menu
More

31
Utility key 2/4
Enter self calibration
Self CAL
Go to previous menu
Previous Menu
Utility key 3/4
Select Hardcopy function
Function
Turn on/off inksaver
Ink Saver
Go to previous menu
Function
Save All
SaveImage/
SaveAll
Previous
Menu
On/ Off
Ink Saver
Off
Hardcopy
Previous Menu
Utility key 4/4
Select probe compensation signal
Wave Type
Set frequency for square wave
Frequency→VAR
Set duty cycle for square wave
Duty Cycle→VAR
Go to previous menu
Previous Menu
DSO-4000 User Manual
32
Default Settings
Here are the factory installed panel settings which
appear when pressing the Save/Recall key→
Default Setup.
Acquisition Mode: Normal
Channel Scale: 2V/Div Invert: Off
Coupling: DC Probe attenuation: x1
BW limit: Off
(DSO-4102, DSO-4062)
Channel 1 & 2: On
Cursor Source: CH1 Cursor: Off
Display Type: Vectors Accumulate: Off
Grid:
Horizontal Scale: 2.5us/Div Mode: Main Timebase
Math Type: + (Add) Position: 0.00 Div
Measure Item: Vpp, Vavg, Frequency, Duty Cycle, Rise
Time
Trigger Type: Edge Source: Channel1
Mode: Auto Slope:
Coupling: DC Rejection: Off
Noise Rejection: Off
Utility Hardcopy: SaveImage,
InkSaver Off
ProbeComp: Square
wave, 1k, 50% duty cycle

33
Built-in Help
The Help key shows the contents of the built-in
help support. When you press a function key, its
descriptions appear in the display.
Help
Applicable keys
A
cquire Display Utility Help
Run/Stop
A
utoset
Cursor HardcopyMeasure Save/Recall
(Vertical)
CH 1
M
A
T
H
CH 2
(Horizontal)
MENU
(Trigger)
MENU
FORCE
SINGLE
Procedure 1. Press the Help key. The
display changes to the Help
mode.
Help
2. Press a functional key to
access its help contents.
(example: Acquire key)
A
cquire
3. Use the Variable knob to
scroll the Help contents up
and down.
V
A
RIABL
E
4. Press the Help key again to
exit the Help mode.
Help
DSO-4000 User Manual
34
MEASUREMENT
The Measurement chapter describes how to
properly observe a signal using the oscilloscope’s
basic functionalities, and how to observe a signal
in detailed manners using one of the advanced
functionalities: automatic measurements, cursor
measurements, and math opetaions.
Basic Measurements
This section describes the basic operations required in capturing and
viewing an input signal. For more detailed operations, see the
following chapters.
•Measurements →from page34
•Configurations →from page49
Activating a channel
Activating a
channel To activate an input channel,
press the Channel key, CH1 or
CH2. The channel indicator
appears at the left side of the
display and the channel icon
changes accordingly.
CH 1
or
CH 2
(Continued on next page)

35
Channel icon
Channel
indicator
Channel 1 off Channel 1 on
De-activating a
channel To de-activate the channel, press the Channel key
twice (once if the channel menu is already
selected).
Using the Autoset
Background Autoset function automatically configures the
panel settings to the best viewing conditions, in the
following way.
•Selecting the horizontal scale
•Positioning the waveform horizontally
•Selecting the vertical scale
•Positioning the waveform vertically
•Selecting the trigger source channel
•Activating the channels
Procedure 1. Connect the input signal to
the oscilloscope and press
the Autoset key.
A
utoset
2. The waveform appears in the center of the
display.
DSO-4000 User Manual
36
Undoing the
Autoset To undo the Autoset, press
Undo (available for 5 seconds). Undo
Adjusting the
trigger level If the waveform is still
unstable, try adjusting the
trigger level up or down by
using the Trigger Level knob.
LEVE L
Limitation Autoset does not work in the following situation.
•Input signal frequency less than 20Hz
•Input signal amplitude less than 30mV
Running and stopping the trigger
Background In the trigger Run mode, the oscilloscope
constantly searches for a trigger condition and
updates the signal into the display when the
condition is met.
In the trigger Stop mode, the oscilloscope stops
triggering and thus the last acquired waveforms
stay in the display. The trigger icon at the top of
the display changes into Stop mode.
Pressing the Trigger Run/Stop key
switches between the Run and Stop
mode.
Run/Stop
(Continued on next page)

37
Waveform
operation Waveforms can be moved or scaled in both the
Run and Stop mode. For details, see page54
(Horizontal position/scale) and page58 (Vertical
position/scale).
Changing the horizontal position and scale
For more detailed configurations, see page54.
The horizontal position knob
moves the waveform left or right.
Setting the
horizontal
position The position indicator moves along with the
waveform and the distance from the center point is
displayed as the offset in the upper side of the
display.
DSO-4000 User Manual
38
To select the timebase (scale), turn
the TIME/DIV knob; left (slow) or
right (fast).
TIME/DIV
Selecting the
horizontal scale
Range 1ns/Div ~ 10s/Div, 1-2-5 increment
Changing the vertical position and scale
For more detailed configuration, see page58.
To move the waveform up or
down, turn the vertical position
knob for each channel.
Set vertical
position
As the waveform moves, the vertical position of
the cursor appears at the bottom left corner of the
display.
Run/Stop mode
The waveform can be moved
vertically in both Run and Stop
mode.
To change the vertical scale,
turn the VOLTS/DIV knob; left
(down) or right (up).
V
O
LTS/ DI
V
Range 2mV/Div ~ 5V/Div, 1-2-5 increments
Select vertical
scale
The vertical scale indicator for each channel on the
bottom left of the display changes accordingly.
Stop mode
In Stop mode, the vertical scale
setting can be changed but the
waveform shape stays the same.