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 .
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.
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.
DSO-2020 USB 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.
DSO-2020 USB 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.
DSO-2020 USB 4. Choose a destination directory. Click 'Next' to continue. 5. Check the setup information. Click Next to start copying of files.
DSO-2020 USB 6. This Status dialog is displayed during copying of files. 7. Updating Your System Configuration. 8. The installation is complete.
DSO-2020 USB 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.
DSO-2020 USB 5. New hardware search wizard starts to search the driver. 6. New hardware wizard installs “DRIVER”.
DSO-2020 USB 7. The wizard has finished installing for “DRIVER”.
DSO-2020 USB 8. New hardware is found. 9. New hardware wizard installs software and finish new hardware search wizard.
DSO-2020 USB 10. The wizard has finished installing for “USB DRIVER”. 1.
DSO-2020 USB 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.
DSO-2020 USB 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.
DSO-2020 USB 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.
DSO-2020 USB 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.
DSO-2020 USB 1.9 Accessories All the accessories listed below are standard accessories for the oscilloscope: Probe × 2 (1.
DSO-2020 USB Chapter 2 Operating Basics The User’s Interface The Menu System The Vertical System The Horizontal System The Trigger System Input Connector User’s Manual 17
DSO-2020 USB 2.1 The User’s Interface Click the software icon on the desk after you finished the software setting and equipment connecting. Then a user interface will be showed as follows: In addition to displaying waveforms, the display area is filled with many details about the waveform and the oscilloscope control settings. 1. The Main Menu All settings can be found in the main menu. 2. The Toolbar 3. Control Panel 4. The Horizontal Panel The user can change Time/Div, format in the panel. 5.
DSO-2020 USB 10. Displays the CH2 information Readouts show the coupling of the channels. Readouts show the vertical scale factors of the channels. A “B” icon indicates that the channel is bandwidth limited. 11. Displays the CH1 information Readouts show the coupling of the channels. Readouts show the vertical scale factors of the channels. 12. Displays Output Window 13. The markers show the reference points of the displayed waveforms. If there is no marker, the channel is not displayed. 14.
DSO-2020 USB 2.2 The Menu System The Main Menu 1. File: Load or Save data, setup 2. View: Change the user interface 3. Horizontal: Set the horizontal system 4. Vertical: Set the vertical system 5.
DSO-2020 USB 6. Display: The waveform display setup 7. Cursor: Cursor measure setup 8. Utility: Utility setting 9.
DSO-2020 USB 2.3 The Vertical System Click “Vertical” in main menu The following figure shows the vertical system menu. It shows the vertical parameters setting. 1. CH1: Leads to the setting of the CH1 parameters 2. CH2: Leads to the setting of the CH2 parameters Use the left mouse button to dragging the channel icon to set the vertical position offset precisely. 2.4 The Horizontal System Click “Horizontal” in main menu The following figure shows the Horizontal System window.
DSO-2020 USB 2.5 The Trigger System Click “Trigger” in main menu. Mode: Sets the trigger mode to Edge trigger Sweep: Selects the trigger sweep mode to AUTO, NORMAL or SINGLE Source: Selects the trigger source to CH1, CH2. Slope: Selects the edge trigger slope to Positive or Negative slope The user can drag the trigger icon to adjust the trigger level and the trigger level will be displayed on the top right corner.
DSO-2020 USB 2.6 Input Connectors Input Connectors: CH 1/CH 2: Input connectors for waveform display. GND.: a ground terminal USB PORT: Connect the B-Type Plug of USB cable to this port. CAL.: Probe compensation output.
DSO-2020 USB Chapter 3 Understanding Function Set Oscilloscope Set Vertical System Set Horizontal System Set Trigger System Measure Signal Utility Function The Display System Save/Load Print User’s Manual 25
DSO-2020 USB 3.1 Set Oscilloscope Save Setup The oscilloscope software saves the current setup before you close the oscilloscope software. The oscilloscope recalls this setup the next time you run the software. You can use the “Save Setup” menu to permanently save up to several different setups. Load Setup The oscilloscope can recall the last setup before the oscilloscope software was running, any saved setups, or the factory setup. You can use the “Load Setup” menu to permanently recall a setup.
DSO-2020 USB You can left click and drag the mouse on the green knob or the yellow knob to change the voltage. ¾ Probe Attenuation Setting Select the attenuation factor for the probe. To check the probe attenuation setting, toggle the probe menu to match the attenuation factor of the probe. This setting remains in effect before you changed again.
DSO-2020 USB Turn off invert Turn on invert The following picture shows the waveform before inversion: User’s Manual 28
DSO-2020 USB The following picture shows the waveform of inversion: 3.2.
DSO-2020 USB Turn On/Off: Turn On/Off the MATH Channel. Source A/B: Set the sources of the math channel. Operate: Set operates type of the math channel. The mathematic functions include addition, subtract, multiply and division for CH1 and CH2.
DSO-2020 USB Fast Fourier Transform Function To use the FFT mode, you need to click in Toolbar to open the FFT setup window. The FFT setup window: You can select the Source channel, Window algorithm, FFT number, and FFT Zoom factor. It displays only one FFT spectrum at a time.
DSO-2020 USB 3.2.2 Set Reference Click “ ” in Toolbar to set REF. The Reference Channel Function: Turn On/Off: Turn on/off the reference channel. Volt/DIV: Channel the resolution of the reference channel. Time/DIV: leading the setting of the time base parameters. You can change the vertical scale of a waveform. The waveform display will contract or expand relative to the reference level.
DSO-2020 USB 3.3 Set Horizontal System The following figure shows the Horizontal System window. It shows the horizontal parameters settings. 1. Time/DIV: leads the setting of the time base parameters 2. Format: leads the setting of the horizontal format parameters The time base ranges of the oscilloscope is listed as follows. The horizontal scan speed is from 4ns/div to 1hour/div. In the “Format” menu of the “Horizontal” menu, select the display mode to Y-T, X-Y. 3.
DSO-2020 USB the waveform to the left of the trigger point. The oscilloscope continues to acquire data while waiting for the trigger condition to occur. The oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point after it detects a trigger. The Edge trigger determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal. Select Edge trigger mode to trigger on Rising edge or Falling edge.
DSO-2020 USB 3.5 Measure Signal 3.5.1 Cursor Click “Cursor” in main menu This method allows you to take measurements by moving the cursors 1. Source The user can set the source to CH1, CH2. 2. Type There are four types of cursors: Cross, Vertical and Horizontal 1) Cross The Cross cursors appear as cross lines on the display and measure the vertical and horizontal parameters.
DSO-2020 USB The Cross cursor display window: 2) Vertical The Vertical cursors appear as vertical lines on the display and measure the vertical parameters.
DSO-2020 USB 3) Horizontal The Horizontal cursors appear as horizontal lines on the display and measure the horizontal parameters. The Horizontal cursor display window: 3.5.2 Measure Click “Measure” in main menu. The oscilloscope provides 20 parametric auto measurements (12 voltage and 8 time measurements).
DSO-2020 USB 1.
DSO-2020 USB the first cycle in waveform -Duty Cycle: Negative Duty Cycle = (Negative Pulse Width)/Period x 100%, Measured of the first cycle in waveform +Pulse Width: Measured of the first positive pulse in the waveform. The time between the 50% amplitude points -Pulse Width: Measured of the first negative pulse in the waveform. The time between the 50% amplitude points 3. Clear Measure Clear all measure items on display screen.
DSO-2020 USB 3.6 The Utility Function Click the “Menu -> Utility” to get into the “Utility” menu. The “Utility” Functions: Calibrate Factory Setup Interpolation Language 3.6.1 Factory Setup Click “Factory Setup” in “Utility” menu to load default setups When you click the Factory Setup in Utility menu, the oscilloscope displays the CH1 and CH2 waveforms and removes all other waveforms.
DSO-2020 USB 3.6.2 Language Click “Language” in “Utility” menu There are four languages in “Language” menu. The default language is English. At the time base 40ns/div or faster, user can use the 3 different interpolation mode to get waveforms of different smoothness. 3.6.
DSO-2020 USB The Linear Interpolation: The Sin(x)/x Interpolation: Note: The default interpolation mode is Sin(x)/x.
DSO-2020 USB 3.7 The Display System Click “Display” in main menu The following figure shows the display system menu. Displays parameters setting. Type Grid Intensity 3.7.1 Type Click “Type” in “Display” menu. If the Vectors type mode is selected, the waveform will be displayed as following figure.
DSO-2020 USB If the Dots type mode is selected, the waveform will be displayed as following figure. 3.7.
DSO-2020 USB The grid shows: Without the grid shows: User’s Manual 45
DSO-2020 USB 3.7.3 Intensity Click “Display->Intensity” in main menu The following figure shows the intensity dialog. It shows the display parameters setting. You can change the grid and waveform color intensity in this dialog.
DSO-2020 USB 3.8 Save/Load Menu Click “File” in main menu to save waveform, setups and screen 1. Save Data Save waveform data 2. Save Setups Save the current oscilloscope setups to file Load Menu Click “File” in main menu to recall saved waveform. 1. Load Data Load the waveform 2.
DSO-2020 USB 3.9 Print 1. 2. Click “Print” in “File” menu to set the printer to print the current waveform. Click the “PrintPreview” in “File” menu to get into the Preview window. In “PrintPreview” window, use the button to change the size of the waveform graph. Click the “Close” button to turn this window off and click the “Print” button to print the report.
DSO-2020 USB Chapter 4 Application Example Sample Measurement Capturing a Single-Shot Signal The Application of the X-Y Taking Cursor Measurement User’s Manual 49
DSO-2020 USB 4.1 Sample Measurement To acquire and display a signal, please do the steps as follows: Connect signal to CH1 by using probe The oscilloscope set the vertical, horizontal, and triggers controls at the best status automatically. Also, you can adjust the controls to meet your measurement to optimize the waveform display. 1. To measure the frequency and “Vpp”, you can do these steps as follows: 2. Click the button, the frequency of the signal display on the bottom of the waveform interface.
DSO-2020 USB The results of measure display in Information output. 4.2 Capturing a Single-Shot Signal To capture a single event, it needs to gather some pre-test knowledge of the signal in order to set up the trigger level and slope correctly. For example, if the event is derived from 3.3V COMS logic, a trigger level of 1.2 or higher Volts should work on a rising edge. Do these steps as follows: 1. Set the probe and the channel attenuations to X 10. 2.
DSO-2020 USB 6) Drag the trigger level sign on the waveform display screen to proper position. It’s usually higher a little above the normal level. 7) When the trigger conditions are met, data appears on the display representing the data points that the oscilloscope obtained with one acquisition. 4.3 The Application of the X-Y X-Y Plot acts to analyze correlation of data of two channels.
DSO-2020 USB Signal in X-Y Format: Instruction of the Ellipse Method Sinθ = A/B or C/D, where θ = phase shift (in degrees) between the two signals.
DSO-2020 USB and III quadrant, . If the main axis is at II and IV quadrant, θ must be in the range of (π/2~π) or (π~3π/2). 4.4 Taking Cursor Measurements Use cursors to make time and amplitude measurements on a waveform quickly. Measure the Peak Frequency or Time of the First Sine Waveform Do these steps: 1. Click “Cursor->Source”, select CH1 (select CH2 if you want measure CH2). 2. Click “Cursor->Type”, select Vertical. 3. Push left mouse button, and the vertical lines appear. 4.
DSO-2020 USB Measure the Amplitude of the First Waveform Peak of the Waveform Do these steps: 1. 2. 3. 4. 5. Click “Cursor->Source”, select CH1 (select CH2 if you want measure CH2). Click “Cursor->Type”, select Horizontal. Push left mouse button, and the Horizontal lines appear. Drag the mouse button to the point you want to measure. Release the left mouse button, the voltage difference will be shown at the status bar.
DSO-2020 USB Appendix Appendix A: Specifications Appendix B: General Maintenance User’s Manual 56
DSO-2020 USB Appendix A: Specification Specifications Table: Input Max. sample rate Real-time sampling:48MS/s Channels Bandwidth 2 Channels 20MHz (-3dB) Vertical resolution 8 bits/channel Gain range 20mV～5V/div@x1 probe(20mV,50mV,100mV,200mV, 500mV,1V,2V,5V/div 1,2,5 sequence) 200mV～50V/div@x10 probe 2V～500V/div@x100 probe 20V～5KV/div@x1000 probe Range 8 divisions Offset level +/-4 divisions Coupling DC Offset increments 0.02 div Impedance 1M ohm DC accuracy +/-3% Max.
DSO-2020 USB Type Square Volt DC 3.3V(±10mV) Frequency 100Hz～50KHz(±2%) Physical Interface Universal Serial Bus(USB 2.0) Power No external power source required.
DSO-2020 USB Appendix B: General Maintenance General Care Do not store or leave the oscilloscope where the device will be exposed to direct sunlight for long periods of time. Caution To avoid damages to the device or probes, do not expose them to sprays, liquids or solvents. Cleaning Inspect the device and probes as often as operating conditions require. Make sure the device disconnect form all power sources. To clean the exterior surface, perform the following steps: 1.
