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softDSP SDS 200A User Manual

Pc based digital oscilloscope
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User's Guide
- SDS 200A -
- SoftScope-
PC Based Digital Oscilloscope

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Summary of Contents for softDSP SDS 200A

  • Page 1 User’s Guide - SDS 200A - - SoftScope- PC Based Digital Oscilloscope...
  • Page 2 Copyright softDSP CO., LTD.. All rights reserved. This document is being furnished by softDSP CO., LTD.. for information purposes only to licensed users of the SDS 200A and is furnished on as “AS IS” basis, that is, without any warranties, whatsoever, expressed or implied.
  • Page 3 FCC NOTICE THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITION: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
  • Page 4 Jungil Bldg 203, 552-1 Sungnae-dong, Kangdong-ku, Seoul, Korea Declares that the following product PC Based Digital Oscilloscope Model No. : SDS 200A Conforms to the technical regulations applicable to the product within the scope of the EMC Directive 89/336/EEC : EMCD...
  • Page 5 It is the user's responsibility to ensure that the product is suitable for the user's application.
  • Page 6 Product Warranty Guide Please read through the “Precautions for Safety” carefully to obtain a long and safe use of this product. This product has been processed through careful quality control and testing procedures. Any malfunctions occurring during normal use are covered under the guidelines of the “Certificate of Product Warranty”, which is included in this Manual.
  • Page 7 Power Source The USB terminal and SDS 200A are connected via a USB cable for DC +5V power from the PC. The product does not require an outside power source. Warning: Be careful not to input excessive power voltage The product’s input power capacity is fixed as shown below to prevent electric shock and/or fire.
  • Page 8 Please eliminate all unused probes or tester leads so that they do not come in contact with surrounding high voltage parts. Make sure that the PC’s power source is grounded. Handling Precautions The probe ground lead is at ground potential. Do not connect the ground lead to an elevated voltage.
  • Page 9 Do not attempt to open the case or repair yourself. It can cause an electric shock or other safety accidents. Once you open the case, you cannot have the privilege of an after-sales service. Call the After-service department at our headquarter through 82-2-470-0491 for repair. (info@softdsp.com)
  • Page 10 Minimum System Requirements To install and run SoftScope, you should have the following; Operating System Windows 98/ME/2000/XP CPU/Mainboard Pentium 200MHz , USB equipped mainboard Memory 32MByte 20MByte Graphic Card Microsoft DirectX supported Screen resolution: 800x600 Color depth: 16bit...

  • Page 11: Table Of Contents

    3. SoftScope Installation................5 4. SDS 200A Setup..................10 5. Setup SDS200A.inf under windows 2000 ..........13 6. Probe Calibration..................15 Ch 2. How to use SDS 200A/SoftScope ............16 1. Simple Measurement................16 2. Basic Operations ..................18 3. Print/Save Waveform................28 Ch 3.

  • Page 12: Ch 1. Introduction

    SDS 200A has advanced trigger circuitry so that it can detect many complex signals. Best performance for your dollar SDS 200A has many features that is comparable to the high speed stand-alone DSOs. But it costs a fraction of the price.
  • Page 13 Chapter 1. Introduction 2. SoftScope SoftScope is a Windows software that controls SDS 200A. Easy to use SoftScope is easy to use. It is intuitive and easy to understand. Big screen SoftScope uses 500 x 400 screen size. Various data format processing SoftScope can save waveform in the following formats: text file, jpg/bmp graphic file, MS excel/word file.

  • Page 14: Hardware Specification

    Chapter 1. Introduction 2. Hardware Specification Input Max. sample rate Realtime sampling: 100MS/s using one channel, 50MS/s using two channels Equivalent sampling: 5GS/s Channels Bandwidth 200 MHz (-3dB) Single shot bandwidth: 50MHz 20MHz bandwidth limiting function is available Vertical resolution 9 bits/channel Gain range 10mV ~ 10V/div @ x1 probe...
  • Page 15 Chapter 1. Introduction Pre/Post trigger 0% ~ 1000% Time resolution 200ps Buffer size 10K ~ 512K samples Trigger Type Edge trigger: Rising edge, falling edge Pulse trigger: Less than width, more than width (10ns ~ 167ms) Delay trigger: By event (1~16,777,215), by time (1us ~ 167ms) Mode Auto, Normal and Single HF Rejection...

  • Page 16: Softscope Installation

    Chapter 1. Introduction 3. SoftScope Installation Caution!) You must install ‘SoftScope’ before using SDS 200A. 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.
  • Page 17 Chapter 1. Introduction 5. Choose a destination directory. Click ‘Next’ to continue. 6. Select Language you use. Click ‘Next’ to continue. 7. Select Graph mode. Click ‘Next’ to continue.
  • Page 18 Chapter 1. Introduction 8. Check the setup information. Click ‘Next’ to start copying of files. 9. This Status dialog is displayed during copying of files. 10. After Installing SoftScope, the installation program will check the DirectX version of your computer. If it is later than 6.0, the installation program will skip the DirectX Setup.
  • Page 19 10.2 Follow the directions of the DirectX Setup.( In case of installing the files downloaded from internet, you must download and install DirectX!) 11. Select if you reboot or not, you must reboot to use SDS 200A. 12. When computer restarts, new hardware is found.
  • Page 20 Chapter 1. Introduction 14. New hardware search wizard starts to search. 15. New hardware wizard installs software. 16. Finish new hardware search wizard.

  • Page 21: Sds 200A Setup

    Chapter 1. Introduction 4. SDS 200A Setup Caution!) SoftScope must be installed before using SDS 200A. This setup process is done once, at the first time of connection. 1. Connect the A-Type Plug of USB cable to your PC’s USB port.
  • Page 22 Chapter 1. Introduction 3. When computer restarts, new hardware is found. 4. New hardware search wizard starts. Select ‘Install the software automatically’ and then ‘Next’. 5. Set the driver search location to CD-Rom and then ‘Next’.
  • Page 23 Chapter 1. Introduction 6. New hardware search wizard starts to search. 7. New hardware wizard installs software. 8. Finish new hardware search wizard.

  • Page 24: Setup Sds200A.inf Under Windows 2000

    Chapter 1. Introduction 5. Setup SDS200A.inf under windows 2000 When SDS200A.inf file is not be detected automatically, you see the following dialog box. In this case you must install SDS200A.inf file manually. 1. Choose ‘Search for a suitable driver for my device’ button. Click ‘Next’ to continue.
  • Page 25 Chapter 1. Introduction 2. Specify a location. Click ‘Next’ to continue. The SDS200A.inf file is located in SoftScope CD-ROM root directory. Specify the location by either entering or browsing. 3. SDS200A.inf file is detected automatically. Click ‘Next’ to continue. 4. Click ‘Next’...

  • Page 26: Probe Calibration

    Chapter 1. Introduction 6. Probe Calibration SDS 200A calibration 1. When manufactured, SDS 200A is calibrated manually to obtain maximum performance. 2. You may calibrate SDS 200A 5 or 6 months after purchase. Probe Compensation 1. You must use a probe with more than 200MHz bandwidth to get undistorted signal.

  • Page 27: Ch 2. How To Use Sds 200A/Softscope

    Ch 2. How to use SDS 200A/SoftScope 1. Simple Measurement 1. Start SoftScope. 2. SoftScope checks the internal state of SDS 200A, USB communication status and then read initialization data. 3. Connect channel 1 probe to the calibration terminal. Push the autoset button.
  • Page 28 Chapter 2. How to use SDS 200A/SoftScope 7. Add persistence effect. A. Persistence effect is analog-scope like effect that remembers the history of displayed waveforms. With persistence effect, you can see the more frequent line clearer. B. Change the persistence effect coefficient.

  • Page 29: Basic Operations

    Chapter 2. How to use SDS 200A/SoftScope 2. Basic Operations Change Vertical Scale(Volt/Div) 1. Press the voltage change panel in the screen. (Same method to Channel 2, Math, Reference) - Select Volt/Div to change. - Voltage per scale is changed.
  • Page 30 Chapter 2. How to use SDS 200A/SoftScope 2. Change horizontal scale(time/div) with mouse button. Push time scale change icon. B. Cursor is changed to “T”. C. Push the left/right mouse button to change volt/div. D. With mouse that supports scroll button, change the trigger point.
  • Page 31 Chapter 2. How to use SDS 200A/SoftScope C. Drag the mouse button to the point you want to measure. D. Release the left mouse button, the voltage difference and time difference will be shown at the status bar. E. Push right mouse button, and the cross lines disappear.
  • Page 32 Chapter 2. How to use SDS 200A/SoftScope Measurement by Icon SDS 200A has many measurement functions. -Peak-to-peak = Max – Min Pk-Pk -Measured over the entire waveform -Voltage of the absolute maximum level -Measured over the entire waveform -Voltage of the absolute minimum level -Measured over the entire waveform -Amp = Base –...
  • Page 33 Chapter 2. How to use SDS 200A/SoftScope - The Root Mean Square voltage over the first cycle in the waveform Cycle RMS - Positive Overshoot = (Max - Top)/Amp x 100 % Positive Overshoot - Measured over the entire waveform...
  • Page 34 Chapter 2. How to use SDS 200A/SoftScope Upper/Lower Level Setting Set Upper/Lower Ratio Upper/Lower standard value should be given to obtain Rising Time and Falling Time. Upper/lower ratio for overall waveform(%) is set using this function and this value is used to calculate Rising/Falling Time Measurement.
  • Page 35 1 waveform after the trigger condition you set. B. Single-shot is available only in Real Time mode. C. Push the single-shot button again to pause, SDS 200A waits for the trigger signal again. Put Label on The Screen 1.
  • Page 36 Chapter 2. How to use SDS 200A/SoftScope E. Change the text/back color. F. Push the confirm button to finish. G. Change the label by clicking the label again. XY Plot XY Plot acts to analyze correlation of data of two channels. Lissajous diagram is displayed in the screen when you use XY Plot, which enables to compare frequencies, amplitudes and phases of counterpart waveform against the reference waveform.
  • Page 37 Chapter 2. How to use SDS 200A/SoftScope Average Add acquired waveform as many as the number of average, calculate and display the average. Perform Moving Average for 2 waves to 256 waves and display it in the screen. Average function is applied to real time Mode and ETS Mode, and this function can not be used when role Mode and ETS Mode are turned off.
  • Page 38 Chapter 2. How to use SDS 200A/SoftScope Can work in ‘File’ of menu. Load Reference( ) : load Reference waveform saved in the form of file. Save Channel1 As Reference( ) : Save the current channel 1 as Reference waveform and load it as Reference waveform.

  • Page 39: Print/Save Waveform

    Chapter 2. How to use SDS 200A/SoftScope 3. Print/Save Waveform 1. Save acquired waveform in the following formats. A. Text File B. JPG/BMP File C. Excel File D. Word File 2. Save as text format. A. In Menu-> File-> ‘Save As DAT’ / Toolbar’, select ‘Save As DAT’ icon( B.
  • Page 40 Chapter 2. How to use SDS 200A/SoftScope Example) Saved BMP File 4. Copy the image into clipboard. A. Select Copy from the File menu. B. Waveform is copied into clipboard. C. Paste the image into any program that supports clipboard paste.
  • Page 41 Chapter 2. How to use SDS 200A/SoftScope 5. Transfer the data to MS Excel using ActiveX automation. A. Select Copy at the File menu. B. MS Excel is activated and then data is transferred by using ActiveX. 6. You can save the data to MS Word using ActiveX automation.
  • Page 42 Chapter 2. How to use SDS 200A/SoftScope 7. Print the waveform. A. Display the waveform, by selecting ‘Print’ / Toolbar printer icon( ) in ‘Menu’-> ‘File’. B. Display the screen to print by selecting Preview’ / Toolbar preview icon ( ) in ‘Menu’->...

  • Page 43: Ch 3. Advanced Technique

    Chapter 3. Advanced Technique Ch 3. Advanced Technique 1. Advanced Trigger You can return to normal trigger mode by uncheck Logic, Pulse, Delay check box in the advanced trigger dialog box. (Normal trigger mode) (Advanced trigger mode) Edge Trigger The Edge Trigger generates a trigger when the source signal passes through a specified level in either positive or negative direction, set by the user.
  • Page 44 Chapter 3. Advanced Technique -Selects the level of the input signal where the Edge Trigger is generated. The level is selected by trigger level pointer at the right-hand side of the display screen and the source is selected from the tool bar radio button.

  • Page 45: Fft Function

    Chapter 3. Advanced Technique 2. FFT function FFT(Fast Fourier Transform) This function analyze the frequency component of current waveform. Pushing the FFT icon, the FFT dialog box appears. < The voltage component analyzed using FFT is displayed as Volt unit, and the value transformed as log scale or by other computation is displayed as rms(root mean square) value.>...
  • Page 46 Chapter 3. Advanced Technique If the information is more than the quantity displayed to the display window, more information is displayed by using scroll bar. 3. The above menu bar of the FFT dialog box :Save the FFT information as various data type Save As Text : This Button saves the FFT information as text formation.
  • Page 47 Chapter 3. Advanced Technique : Sum of Noise (excluding fundamental frequency, Harmonics, DC and Nyquist bins) : Total Number of bins : Total Number of bins of Harmonic : Total Number of bins of Noise. SNR(Signal to Noise Ratio) : The ratio of the amplitude of the fundamental frequency to the Noise.
  • Page 48 Chapter 3. Advanced Technique 5. The FFT display window :Each green cross points to the Harmonics and red cross points to the cursor. A coordinate axis of X displays the frequency and a coordinate axis of Y displays the amplitude of the frequency.

  • Page 49: Math

    Chapter 3. Advanced Technique 3. Math Add/Subtract/Multiply/Divide the two waveforms. Push the Math icon. Src1/Src2 Sets input source. Operator Sets operation method 2. Select source 1, source 2 and operator from the dialog box. Example) Input1 waveform + Input2 waveform...

  • Page 50: Ch 4. Toolbars, Menus, Dialog Boxes & Screen Information

    Ch 4. Toolbars, Menus, Dialog boxes & Screen Information Ch 4. Toolbars, Menus, Dialog boxes & Screen Information 1. Toolbar 1. Save As Dat -Save as “.dat” file 2. Preview -Previews current waveform 3. Print -Prints current waveform 4. Option -Shows option dialog box 5.
  • Page 51 Ch 4. Toolbars, Menus, Dialog boxes & Screen Information 26. Reference Voltage Scale -Adjust Reference Volt/Div 27. Time/Div -Adjust Time/Div 28.Delay On/Off -Sets trigger delay on -Sets trigger delay off 29. Trigger Source -Sets trigger source to a specific channel 30.

  • Page 52: Screen Information

    When SDS 200A is in a delay-on state it shows the current trigger point using time dimension. When SDS 200A is in a delay-off state it shows the current trigger point using % scale. : Trigger point display window The trigger point shows the trigger position in the acquired waveform.
  • Page 53 Display trigger source, trigger mode, trigger type, trigger slop and trigger level. : Trigger state of current acquired waveform A. Auto - Trigger signal is automatically generated because of no valid triggered signal. B. Trig? – SDS 200A is waiting for the incoming trigger. C. Trig'd – Acquired waveform is triggered.

  • Page 54: Option Dialog Box

    Ch 4. Toolbars, Menus, Dialog boxes & Screen Information 3. Option Dialog Box Title Check to include title on file/print output, use to set the title on file/print output Format Sets color or Black/white type Include : Check to include information on file/print output Include Date Include Date on file/print output Include Setup Information...

  • Page 55: Menu

    Ch 4. Toolbars, Menus, Dialog boxes & Screen Information 4. Menu File Hot-key Name Sub Menu Operation Load State Load saved state of SoftScope Save State Save state of SoftScope Save As DAT Save as DAT File format Ctrl +S Save As JPG Save as JPG File format Save As BMP...
  • Page 56 Ch 4. Toolbars, Menus, Dialog boxes & Screen Information Display Hot-key Name Sub Menu Operation Line Join On/Off Joins the waveform with line Ctrl + J Persistence Changes the persistence effect Ctrl + E Intensity Increases intensity of waveform Ctrl + Inc Decreases intensity of waveform Ctrl + Del Label Edit On/Off...
  • Page 57 Ch 4. Toolbars, Menus, Dialog boxes & Screen Information Horizontal Name Sub Menu Operation Hot-key Change Time/Div setting Ctrl + T Time/Div Delay On/Off On/Off Delay Ctrl + D Trigger Sub Menu Name Operation Hot-key Trigger Source CH1 Selects CH1 from trigger source Shift+Ctrl+F1 Trigger Source CH2 Selects CH2 from trigger source...
  • Page 58 Ch 4. Toolbars, Menus, Dialog boxes & Screen Information ETS Calibration Processes ETS calibration Measure Name Sub Menu Operation Hot-key Voltage Peak to Peak Measurement of Peak to Peak Voltage Ctrl+Alt + P Maximum Measurement of Maximum Voltage Ctrl+Alt + X Minimum Measurement of Minimum Voltage Ctrl+Alt + N...

  • Page 59: Appendix

    Appendix Appendix Software Calibration It is necessary for you to calibrate regularly to make the measurements as accurate as possible 1. Short input signal as shown below. 2. Zero calibration dialog box appears.

  • Page 60: Ets Calibration

    Appendix ETS Calibration In ETS mode, waveform distortion may arise from the environmental changes. In this case, you can use ‘ETS calibration function’. 1. Connect channel 1 probe to the calibration terminal. 2. Set probe attenuation factor to 1:1. 3 . In ‘Util’ menu, select ‘ETS Calibration’. 4.

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