VOLTCRAFT DSO-2020 USB User guide
USER’S MANUAL
DIGITAL OSCILLOSCOPE
DSO-2020 USB
Content
General Safety Summary .............................................................................. 1
Chapter 1 Getting Start .................................................................................. 2
1.1 System Requirement ........................................................................................................... 3
1.2 Install Software ................................................................................................................... 4
1.3 Install Driver ....................................................................................................................... 7
1.4 General Features ............................................................................................................... 11
1.5 General Check ................................................................................................................... 12
1.6 Probe Compensation ......................................................................................................... 12
1.7 Function Check ................................................................................................................. 13
1.8 Self Calibration ................................................................................................................. 15
1.9 Accessories ........................................................................................................................ 16
Chapter 2 Operating Basics ........................................................................ 17
2.1 The User’s Interface .......................................................................................................... 18
2.2 The Menu System ............................................................................................................. 20
2.3 The Vertical System .......................................................................................................... 22
2.4 The Horizontal System ...................................................................................................... 22
2.5 The Trigger System ........................................................................................................... 23
2.6 Input Connectors ............................................................................................................... 24
Chapter 3 Understanding Function ............................................................ 25
3.1 Set Oscilloscope ................................................................................................................ 26
3.2 Set Vertical Systems .......................................................................................................... 26
3.3 Set Horizontal System ....................................................................................................... 33
3.4 Set Trigger System ............................................................................................................ 33
3.5 Measure Signal .................................................................................................................. 35
3.6 The Utility Function .......................................................................................................... 40
3.7 The Display System .......................................................................................................... 43
3.8 Save/Load Menu ............................................................................................................... 47
3.9 Print ................................................................................................................................... 48
Chapter 4 Application Example .................................................................. 49
4.1 Sample Measurement ........................................................................................................ 50
4.2 Capturing a Single-Shot Signal ......................................................................................... 51
4.3 The Application of the X-Y ............................................................................................... 52
4.4 T a king Cursor Measurements ............................................................................................ 54
Appendix ...................................................................................................... 56
Appendix A: Specification ...................................................................................................... 57
Appendix B: General Maintenance ......................................................................................... 59
DSO-2020 USB
General Safety Summary
Review the following safety precautions carefully before operate the device to avoid
any personal injuries or damages to the device and any products connected to it. To avoid
potential hazards use the device as specified by this user’s guide only.
To Avoid Fire or Personal Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Connect and Disconnect Properly. Connect the probe output to the measurement
device before connecting the probe to the circuit under test. Disconnect the probe
input and the probe reference lead from the circuit under test before disconnecting
the probe from the measurement device.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings
and markings on the product. Consult the product manual for further ratings
information before making connections to the product.
Use Proper Probe. To avoid shock hazard, use a properly rated probe for your
measurement.
Avoid Circuit or Wire Exposure. Do not touch exposed connections and
components when power is on.
Do Not Operate With Suspected Failures. If suspected damage occurs with the
device, have it inspected by qualified service personnel before further operations.
Provide Proper Ventilation. Refer to the installation instructions for proper
ventilation of the device.
Do not operate in Wet/Damp Conditions.
Do not operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
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DSO-2020 USB
Chapter 1 Getting Start
The oscilloscope is small, lightweight, no external power required, portable oscilloscopes!
The oscilloscopes is ideal for production test, research and design and all of the
applications involving analog circuits test and troubleshooting, as well as education and
training.
In addition to the list of general features on the next page, this chapter describes how to
do the following tasks:
System Requirements
Install software
Install driver
General Features
General Check
Probe compensation
Functional Check
self calibration
Accessories
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1.1 System Requirement
To run the oscilloscope software, the needs of computer configuration are as follows:
Minimum System Requirements
Operating System
Window XP/VISTA/7
Processor
Upwards of 1.00G processor
Memory
128M byte
Disk Space
500M disk free space
Screen resolution
800 x 600
Recommended Configuration
Windows XP SP2 System
2.4G Processor
512M Byte Memory
80G Disk Space
1024 x 768 or 1280 x 1024 resolution
DPI Setting: Normal Size (96DPI)
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1.2 Install Software
Caution: You must install the software before using the oscilloscope.
1. While in Windows, insert the installation CD into the CD-ROM drive.
2. The installation should start up automatically. Otherwise in Windows Explorer, switch
to the CD-ROM drive and run Setup.exe.
3. The software Installation is started. Click 'Next' to continue.
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4. Choose a destination directory. Click 'Next' to continue.
5. Check the setup information. Click Next to start copying of files.
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6. This Status dialog is displayed during copying of files.
7. Updating Your System Configuration.
8. The installation is complete.
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1.3 Install Driver
1. Connect the A-Type Plug of USB cable to your PC’S USB port.
2. Connect the B-Type Plug of USB cable to USB port.
3. New hardware is found.
4. New hardware search wizard starts.
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5. New hardware search wizard starts to search the driver.
6. New hardware wizard installs “DRIVER”.
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7. The wizard has finished installing for “DRIVER”.
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8. New hardware is found.
9. New hardware wizard installs software and finish new hardware search wizard.
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10. The wizard has finished installing for “USB DRIVER”.
1.4 General Features
Maximum real-time sample rate: 48MSa/s
Memory depth: 1Mbytle/channel
Built-in Fast Fourier Transform function(FFT);
20 Automatic measurements;
Automatic cursor tracking measurements;
waveform storage;
User selectable fast offset calibration;
Add, Subtract , Multiply and Division Mathematic Functions;
Adjustable waveform intensity, more effective waveform view;
User interface in several user-selectable languages;
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1.5 General Check
Please check the instrument as following steps after receiving an oscilloscope:
Check the shipping container for damage:
Keep the damaged shipping container or cushioning material until the contents of the
shipment have been checked for completeness and the instrument has been checked
mechanically and electrically.
Check the accessories:
Accessories supplied with the instrument are listed in "Accessories" in this guide. If
the contents are incomplete or damaged，please notify the franchiser.
Check the instrument:
In case there is any mechanical damage or defect, or the instrument does not operate
properly or fails performance tests, please notify the franchiser.
1.6 Probe Compensation
Perform this function to match the characteristics of the probe and the channel input.
This should be performed whenever attaching a probe to any input channel at the first
time.
From the “Probe” menu, select attenuation to 1:10. Set the switch to “X10” on the
probe and connect it to CH1 of the oscilloscope. When using the probe hook-tip,
insert the tip onto the probe firmly to ensure a proper connection.
Attach the probe tip to the Probe Compensator and the reference lead to the
ground connector, select CH1, and then press the “AUTOSET“ button into the
menu or the toolbar.
Check the shape of the displayed waveform.
Correctly Compensated
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Over compensated
Under Compensated
■ If necessary, use a non-metallic tool to adjust the trimmer capacitor of the probe for
the fattest square wave being displayed on the oscilloscope.
■ Repeat if necessary.
WARNNING: To avoid electric shock while using the probe, be sure the perfection of the
insulated cable, and do not touch the metallic portions of the probe head while it is
connected with a voltage source.
1.7 Function Check
Perform this functional check to verify that your oscilloscope is operating correctly.
Connect the oscilloscope
You should connect the A-Type Plug of USB cable to your PC USB port and connect
the B-Type Plug of USB cable to oscilloscope USB port.
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Input a signal to a channel of the oscilloscope
The oscilloscope is equipped with dual channels plus external trigger.
Please input signal in the following steps:
Set the attenuation switch on the probe as 10X and connect the probe on the oscilloscope
with CH1. Aim the slot in the probe connector at the faucet on BNC of CH1 and insert,
then, turn right to lock the probe. Finally, attach the tip of probe and ground nip to the
Connector of Probe compensator.
1. Set the CH1 probe attenuation of the oscilloscope to X10. (The default is X1).
2. Attach the tip of probe and ground nip to the Connector of Probe compensator. A
square wave will be displayed within a several seconds. (Approximately 1 kHz,
2V, peak- to- peak).
3. Inspect CH2 with the same method. Repeat steps 2 and 3.
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1.8 Self Calibration
The self calibration routine lets you optimize the oscilloscope signal channel for maximum
measurement accuracy.
You can run the routine at any time but you should always run the routine if the ambient
temperature changes by 5℃ or more. For accurate calibration, power on the oscilloscope
and wait ten minutes to ensure it is warmed up.
During the calibration, there should be no signals input into CH1/CH2.To compensate the
signal channel, disconnect any probes or cables from the input connectors. To do this and
to avoid external interference, user should short-connect CH1/CH2 terminal to the ground
(any GND terminal) during the calibration process.
Then, access the “Menu -> Utility -> Calibration” option and the following dialog will
appear on the screen, follow the instructions and click “OK”.
The calibration is done.
Note: The calibration runs very fast that you might not notice it.
If the benmark lines are deviated or the oscilloscope needs to be calibrated, after you
run this self-calibration, you will find the software runs very fast in less than 1 second while
you will find the positions of the benchmark lines changed after the calibration.
If this oscilloscope has been calibrated before or the benchmark does not need to be
adjusted, you can not see anything happen, but actually it has been finished.
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1.9 Accessories
All the accessories listed below are standard accessories for the oscilloscope:
Probe × 2 (1.5m), 1:1, (10:1) Passive Probes
A User ’s Guide
An USB Cable
A PC software of the oscilloscope
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Chapter 2 Operating Basics
The User’s Interface
The Menu System
The Vertical System
The Horizontal System
The Trigger System
Input Connector
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