OWON User manual for PDS series User Manual Portable LCD Digital Storage Oscilloscope PDS5022S, PDS6042S, PDS6062S, PDS6062T, PDS7062T, PDS7102T ~ 1 ~
OWON User manual for PDS series Information contained in this document is subject to change without notice. 2011 OWON Technology Ltd. All rights reserved. Reproduction in any manner is prohibited without the written permission of OWON Technology Ltd. The Lilliput s products are under the protection of the patent rights in the U.S.A and other countries, including those which are applying for. OWON is the registered trademark of Fujian Lilliput. Fujian Lilliput Optoelectronics Technology Co. Ltd OWON Technology Ltd is a company of Lilliput Group. September 2011 Ver.5.0.2 Document reference: OWON/UK/DOC1/V-01012011 ~ 2 ~
User s Manual: OWON Portable Digital Storage Oscilloscope 1 Warranty Lilliput warrants this instrument to be free of defects in parts and workmanship for 3 years from date of shipment (a 12 month limited warranty applies to Probes, rechargeable battery, USB cable and other accessories). The warranty only applies to the original purchaser and is not transferable to any other third party. If it should become necessary to return the instrument for service during or beyond the warranty period, Please contact the UK Customer Service Department at +44 8450 508168 or email to: support@owon.co.uk with your copy of purchase proof. A Return Material Authorization (RMA) must be issued prior to the return of any product, and RMA number should be visible on the package of the return and should be quoted all time for any related enquiries. It s the sender s responsibility for Shipping costs, freight, insurance and proper packaging should be used to prevent damage in transit. No components of our products are user-serviceable. DO NOT open or remove covers. Repairs and service may only carry out by our Service Centre or authorized service engineer. Failure to do so shall void any warranty, stated or implied. This warranty does not apply to defects resulting from action of the user such as misuse, improper wiring, any operations outside of its specification, improper maintenance or repair, or unauthorized modification. We specifically disclaim any implied warranties for a specific purpose and will not be liable for any direct, indirect, incidental or consequential damages. Our total liability is limited to repair or replacement of the product. Product specifications are subject to change without prior notice. Calibration and Repair Service OWON Tec offers repair and calibration services for products we supply. A UKAS certification is also available through our authorized service provider at additional cost should you require. Please contact Customer Support & Service Department for further information, OWON recommends that all Instruments should be calibrated annually to maintain its performance and accuracy. Customer Support & Service OWON Technology Ltd Tel: +44 8450 508168 Email: support@owon.co.uk For latest version of this User s Manual, Software updates, and other information please visit our website at: www.owon.co.uk
Table of Contents User s Manual: OWON Portable Digital Storage Oscilloscope 2 1. Safety Information 1.1 Safety Terms and Symbols 4 1.2 Safety information 5 2. Your PDS Oscilloscope 2.1 Overview 7 3. Use Your Digital Oscilloscope.7 3.1 What are in the standard package?...8 3.2 Front panel and User interface...9 3.3 Check Your Oscilloscope before first use 12 3.4 Adjust Your Probe...13 3.4 Set your Probe Attenuation Coefficient..14 3.5 Use Your Probe Safely 15 3.6 Do Self-calibration..15 3.7 The Vertical controls..16 3.8 The Horizontal controls...17 3.9 The Trigger controls..18 4.Use more of Your Digital Oscilloscope.19 4.1 Use Vertical controls..20 4.1.1 CH1/CH2 MENU...20 4.1.2 Set Coupling for selected Channel...21 4.1.3 Use Inverted Function...22 4.1.4 Use Math Functions.. 23 4.1.5 Use FFT..25 4.1.6 Use VERTICAL POSITION and VOLTS/DIV Knobs.28 4.2 Use Horizontal controls.....28 4.2.1 Main Time Base.....28 4.2.2 Set up Window...29 4.2.3 ZOOM IN..29 4.3 Use Trigger Controls 30 4.3.1 Trigger Menu for PDS5022S PDS6042S PDS6062S PDS6062T 30 4.3.2 Trigger Menu for PDS7062T PDS7102T 35
User s Manual: OWON Portable Digital Storage Oscilloscope 3 4.3.3 Set up a Video Trigger under Single Trigger Mode 38 4.3.4 Alternate trigger...39 4.4 Use MENUS 41 4.4.1 Use ACQUIRE.41 4.4.2 Use DISPLAY...42 4.4.3 Display Format.44 4.4.4 Use SAVE/RCL 45 4.4.5 Use UNTILITY 46 4.4.6 Carry out a Self-Calibration 47 4.4.7 Use Automatic Measurement 47 4.4.8 Use CURSOR 50 4.4.9 Use Autoscale 52 4.5 Use Executive Controls.53 4.5.1 AUTOSET 4.5.2 STOP/RUN 5. Quick Start... 55 5.1 Example 1: Measurin a Simple Signal... 56 5.2 Example 2: Working out the Gain of the Amplifier in the Metering Circuit...57 5.3 Example 3: Capturing the Single Pulse... 58 5.4 Example 4: Noise analysis and reduction... 60 5.5 Example 5: Examine the Phase shift between two related signals... 61 5.6 Example 6: Triggering Video Signal outputted from a TV set... 62 6. Troubleshooting... 63 7. Appendix A:Specifications... 64 8.Appendix B: Accessories... 67 9.Appendix C: Maintenance and Service... 69 10.Appendix D: Using Rechargeable Battery... 70
User s Manual: OWON Portable Digital Storage Oscilloscope 4 1. Safety Information Use the following safety guidelines to help ensure your own safety and to help protect your Digital Oscilloscope and working environment from potential damage. 1.1 Safety Terms and Symbols Safety Symbols The following symbol may appear on the products: Hazardous Refer to Manual Protective Grounding Terminal Measurement Voltage Earth Terminal of Chassis Ground Terminal Safety Terms The following symbols and terms may appear on the products and this manual: --------------------------------------------------------------------------------------------------------------------------- Warning: warning indicates a potential for personal injury, or death. --------------------------------------------------------------------------------------------------------------------------- Caution: Caution indicates a potential for product damage or other property damage. --------------------------------------------------------------------------------------------------------------------------- DANGER indicates an injury hazard may be immediately accessible. WARNING indicates an injury hazard may be not immediately accessible. CAUTION indicates a hazard to this instrument or other property. 1.2 Safety Information NO PARTS OF THIS INSTRUMENT ARE USER SERVICEABLE. PLEASE USE ONLY OWON AUTHORIZED SERVICE CENTRE AND QUAILFIED SERVICE ENGINEER TO CARRY OUT ANY SERVICE FOR YOUR PRODUCT. PLEASE FOLLOW THE GUIDELINES AND TAKE SAFETY PRECAUTIONS BEFORE STARTING TO USE THIS INSTRUMENT AND MAKE SURE YOUR USE OF THIS INSTRUMENT MUST BE WITHIN THE RANGE OF ITS SPECIFICATION.
User s Manual: OWON Portable Digital Storage Oscilloscope 5 Warning: To avoid fire or electrical shock, when using battery charge as power supply, and input signal connected is more than 42V peak (30Vrms) or on circuits more than 4800VA, you should Only use insulated Probes and test lead. Check the Probes before use and replace it if there are any damages. Remove Probes, test leads immediately after use. Disconnect USB/RS232 cable. Do NOT connect to computer when the instrument is in use. Not apply high voltage than its rating, use with caution when setting x1 on the Probe. NOT use exposed metal BNC or banana plug connectors NOT insert metal objects into connectors. To avoid Fire or Personal Injury Use the proper power cord. Use only the power cord supplied with the product and certified to use in your country. Connect or Disconnect Correctly. Please do not connect or disconnect a test lead/probe when they are connected to a voltage source. Ground This product is grounded through the power cord grounding conductor. To avoid electric shock, it must be grounded properly before making any connection with input or output terminal of this instrument. Connect the Probe properly. The voltage level of the Probe ground is at the same level with this instrument ground. Do not connect the instrument ground to a high voltage. Check All Terminals ratings. To avoid fire or shock hazard, check all ratings and marking on the product you intend to use with this instrument. Refer to the product manual for further information of their ratings before connecting to the instrument. Do NOT use without cover or panel. Do not operate the instrument without cover or panel. Use the proper fuse. Use only the specified type and rating fuse for this instrument. Avoid exposed circuitry. Do not contact any components or parts when the instrument is powered on.
User s Manual: OWON Portable Digital Storage Oscilloscope 6 Do NOT operate if in any doubt. If you suspect any damages to this instrument stop operating immediately and contact qualified service engineer to arrange an inspection. Use your Oscilloscope in a well-ventilated area. Make sure the instrument installed with proper ventilation, refer to the user manual for more details. Do NOT use Oscilloscope in any wet/damp condition or when you are wet. Do NOT use Oscilloscope in an explosive atmosphere. Keep Oscilloscope surface clean and dry.
User s Manual: OWON Portable Digital Storage Oscilloscope 7 2. Your PDS Oscilloscope 2.1 Overview Models are covered by this manual: Bandwidth Sample Rate PDS5022S 25MHz 100MS/s PDS6042S 40MHz 250MS/s PDS6062S 60MHz 250MS/s PDS6062T 60MHz 250MS/s PDS7062T 60MHz 500MS/s PDS7102T 100MHz 500MS/s Record length of 6K points per channel (2.5M points per channel for PDS8202T) Support cursor readings 20 automatic measurements Auto scale Color LCD Display with high resolution and adjustable contrast (PDS5022s,PDS6042s) Store up to 4 waveforms; Auto-settings for a quick and easy measurement Waveform Math Built-in FFT Support both average and peak values of the waveform; Real-time Digital Oscilloscope Multiple triggering, including Edge, video and Alternating triggering USB interface for PC communications Support USB direct output (PDS8202T only) Multiple language support (English, Simplified Chinese. French, Russian and Spanish are optional )
User s Manual: OWON Portable Digital Storage Oscilloscope 8 3. Use Your Digital Oscilloscope 3.1 What are in the standard package? Please check the package after receiving your order. Report any damage up on arrival. Please contact our reseller if you find any damage of package and instrument on receiving your order and report it to reseller as soon as possible for a replacement or refund. Check standard Accessories. A full list of accessories can be found in Appendix B. Report to reseller immediately if any of them are missing. 3.2 Front Panel and user interface Our PDS series scope has a very sample Front Panel and user interface to operate. See picture below for an overview. It consists of LCD display, Menus, Knobs, Push buttons, inputs and an output of internal standard test signal (1 KHz, 5V). FRONT PANEL Main Menu controls: Fig.1 Front Panel SAVE/RCL: save or recall waveform. ACQUIRE: set up acquisition mode. CURSOR: measure CURSOR. MEASURE: set up and take measurements UTILITY: SYS status and Reset, etc. DISPLAY: set up display type, etc.
User s Manual: OWON Portable Digital Storage Oscilloscope 9 Math Menu: choose MATH for waveform calculations. Sub-Menu Keys: F1 to F5 for selecting options when Main Menu is chosen. Channels controls: Select and set up Channels including its Vertical range. Inputs: Channel inputs, including CH1, CH2 and External Position Controls: POSITION: set up and change horizontally windows or time base cursor position. HORIZONTAL Menu: set up time base window and display. Trigger Controls: Set up trigger levels, source, type etc. Test signal output: Standard 1 Khz, 5V square wave for adjusting PROBE or input testing. Fig.2 Menu controls, Knobs and Inputs on Front panel
User s Manual: OWON Portable Digital Storage Oscilloscope 10 USER INTERFACE Fig.3 User interface 1. The state of trigger, including: Auto: Automatic mode and acquire waveform without triggering. Trig'd: Trigger detected and acquire waveform. Ready: Pre-triggered data captured and ready for a trigger. Scan: capture and display the waveform continuous mode. Stop: data acquisition stopped. 2. Waveform Display area. 3. The purple T cursor indicates the horizontal position for the trigger. 4. Readings for time deviation between the horizontal trigger point and the centre of LCD screen. It s 0 when point is in the centre. 5. Readings for the time deviation between the horizontal trigger point and the centre of selected window. It s 0 when in the center of selected Window. 6. The current Main Menu selected.
User s Manual: OWON Portable Digital Storage Oscilloscope 11 7. Options for sub-menu under selected Main Menu. 8. The purple cursor V: current trigger level if it has been set up. 9. Readings for current trigger level. 10. Current Trigger Source. 11. Current trigger type: Rising edge triggering Falling edge triggering Video line synchronous triggering Video field synchronous triggering 12. Readings for time base value of current WINDOW. 13. Readings for selected main time based value. 14. Size of selected WINDOW. 15. Coupling mode for CH2. direct current coupling ~ AC coupling indicates GND coupling. 16. Readings for current selected vertical scale (V/D) for CH2. 17. Coupling mode for CH1 : " " direct current coupling "~" indicates the AC coupling " indicates GND coupling. 18. Readings for current selected vertical scale for CH1. 19. Readings for current base point positions for CH1 or CH2. 20. The yellow cursor for the grounding zero for CH2, No cursor when CH2 is off. 21. The red cursor for grounding zero for CH1, No cursor when CH1 is OFF. 22. Purple dot lines for cursor measurements when VOLTAGE type is selected.
User s Manual: OWON Portable Digital Storage Oscilloscope 12 3.3 Check your Oscilloscope before first use A quick start up check is required before using the instrument to make sure the instrument functions normal according to its specification. Power on the instrument and Press any key to enter operating mode when prompt Press any key entering system. Select Menu UTILITY and then F2 for Recall Factory settings. The default value for attenuation coefficient of Probe is x10. Fig.4 Start-up check Choose a Probe supplied and set it Probe switch to x10, connect it to CH1 input. Connect Probe tip to 1 Khz 5V test signal output and ground clamp shown as follows: Fig.5 Test Signal to Probe for CH1 Press AUTO SET on top of Front panel near Main Menus. The 1 KHz and 5V signal will be displayed on the screen after few seconds, shown as Fig.6 Fig.6 Screen shot after performing AUTO SET
User s Manual: OWON Portable Digital Storage Oscilloscope 13 Repeat above steps for CH2 to make sure both channels are functional. 3.4 Adjust your Probes The Probe supplied is a pair of Passive Probe with x1 and x10 attenuation and it is adjustable. It s important to adjust the compensation whenever you use x10 for testing and reduce the chance to have a wrong measurement. Here are the procedures to you should follow for the adjustment of compensation. Set the attenuation coefficient of your Probe to x10, Switch on your instrument and go to CH1 MENU, than F3 to change the Probe to 10X. Connect your Probe properly to built-in 1kz 5V test signal output marked with PROBE COMP, Press AUTOSET to continue. Compare the waveform displayed on your with these reference and make sure your waveform is not overcompensated or under compensated. Fig.7 Reference Waveforms Repeat this if needed. Adjust the Probe using supplied screw until you get a square wave looked like reference waveform 2. Fig.8 Adjust to compensate the Probe.
User s Manual: OWON Portable Digital Storage Oscilloscope 14 3.5 Set correct Attenuation Coefficient for Probes CAUSTION: The default factory attenuation coefficient set on the instrument for both Channel 1 and Channel 2 are 10X. The standard Probes supplied support 1X and 10X. Probes support 100X or 1000x are available to purchase for an extra cost. Choosing different attenuation coefficients changes the vertical scale factor of the display. It s always important to make sure attenuation coefficient on both the Channel of the scope and the Probe connected to that channel are matched with the same settings. Switch on your Scope and Select the CH1 MENU OR CH2 MENU, under Probe section, Press F3 to choose Attenuation Coefficient you want to use. Once it is done, the scope would remember the setting until it is changed. Check your Probe before connecting to Input Channel and make sure it is set to the same setting of that Channel on the Oscilloscope. Fig 9 shows you where to change the settings on your Probe. Fig.9 Attenuation Switch CAUSTION: The Probe is limited to work with up to 5mhz signal when using x1, to use the full bandwidth of the scope, You should always set to use x10.
User s Manual: OWON Portable Digital Storage Oscilloscope 15 3.6 Use Probe safely There is a safety ring on the Probe to protect you getting any electric shock, as it is shown on Fig.10. Please take caution use the Probe. Fig.10 Finger Guard Warning: Always keep your finger behind the safety ring while any tests are in operation to avoid electric shock. Do NOT touch any metal Part of the Probe including the tip during any operations or when it is connected to any power source. Always connect the Ground terminal of the Probe to the earth before taking any measurements. 3.7 Do Self-calibration All our Oscilloscopes have a built-in function called Do Self Calibration. This is to set the Oscilloscope to its best possible condition to help users for a quick and accurate measurement. You can do this at any time if you wish to, please make sure to run this function whenever the change of ambient temperature is 5 or over, this is to ensure you always get the best possible measurements from your instrument. Before carrying out a self calibration, please disconnect all Probes or inputs from the Oscilloscope. Press UTILITY then button F3 which is next to Do Self Cal. You will see a Pop-up yellow box to reminder you to remove any Probes and other attachments to the inputs of Oscilloscope, once they are all done, Press F3 again. The Oscilloscope would start its self-calibration route and the yellow box remains to show you the progress till the process is done. Warning: DO NOT TOUCH OR CONNECT ANYTHING TO THE INPUTS WHEN IT IS DOING SELF-CALIBRATION. IT COULD CAUSE POTENTIAL DAMAGE TO THE INSTRUMENT AS WELL AS THE OPERATOR.
User s Manual: OWON Portable Digital Storage Oscilloscope 16 3.8 The Vertical Controls As it is shown in Fig.11, there are a few knobs above/under CH1/CH2 Menu for changing the vertical level of the signal, we call them VERTICAL CONTROLS. Fig.11 Vertical Controls Area 1. By rotating the Position controls on the top. It moves the CH1 or CH2 trace up and down on the display, which means the baseline of that channel is changing. If Coupling in DC mode, you can quickly to measure the DC component of the signal between trace and the ground signal. Under the AC mode, the DC component would be filtered out to show a higher sensitivity signal of AC component. 2. By rotating the knob VOLTS/DIV, the vertical scale Factor for corresponding channel would change between 5mv to 5v(or 50mv to 50v when using x10 etc). 3. Value displayed on the bottom of the screen for each channel changes respectively when using the Vertical control.
User s Manual: OWON Portable Digital Storage Oscilloscope 17 3.9 The Horizontal controls As it is shown in Fig.12, there are few button and knobs on the right side of the front panel. We call them the HORIZONTAL CONTROLS. This is where you can change the horizontal position of your signal and the time base settings for the channel. Fig.12 Horizontal Control Area 1. By rotating the Knob SEC/DIV, it changes the time base settings from 5ns to 5s.For PDS5022s, it steps 1-2.5-5, for other PDS models it steps 1-2-5 accordingly. 2. By rotating the Knob HORIZONTAL POSITION, it changes the horizontal position of the signal as well as the displacement of triggering signal if trigger has been set. 3. By pushing down the button HORIZONTAL MENU, you enter in WINDOW settings, this allows user to set up a window to include the signal which they are interested in and zoom it in to look more details. 4. Again use Knob HORIZONTAL POSITION to move the position and Knob SEC/DIV for the size of WIDNOW, Press F3 next to Zone Window to expend the window on the screen. 5. There are areas on the top and bottom of the screen where values are displayed. Values representing horizontal position, main time base and the width of the window would change when Horizontal controls change.
User s Manual: OWON Portable Digital Storage Oscilloscope 18 3.10 The Triggering Controls As it is shown in Fig.13, there are four buttons and one knob make up TRIGGERING CONTROLS. 1. TRIG MENU Fig.13 Trigger Control Area Press this button to bring up TRIG MODE. This is where you can change trigger Type, selecting channel, Slope, Coupling and Sensitivity. 2. LEVEL This knob is to change the trigger level vertically. By rotating the knob, the level of the trigger cursor V for selected channel would move up and down. Trigger level displayed on the bottom changes accordingly. 3 SET TO 50% It s a shortcut to set the trigger level half way 50% of its signal. 3. FORCE TRIG Press this button to force a trigger signal, which is mainly applied to the Normal" and "Single trigger mode. 4. SET TO ZERO Press this to reset the horizontal position of the trigger back to the middle line of the display.
User s Manual: OWON Portable Digital Storage Oscilloscope 19 4. Use more of your Oscilloscope After finishing Chapter 3, you now have the basic knowledge of your oscilloscope and accessories. If you have not read Chapter 3 and don t have experience about our oscilloscope, we recommend you to go back and spend few minutes for a start. In this chapter we more focus on using and setting up your scope ready for a test. Here is the list of topics we are going to cover in the next 30-40 minutes. Use Vertical controls Use Horizontal controls Use Trigger controls Use MENUS Use Executive Controls
User s Manual: OWON Portable Digital Storage Oscilloscope 20 4.1 Use Vertical Controls As you know from last chapter, The VERTICAL CONTROLS includes CH1 MENU, CH2 MENU, MATH MENU, VERTICA POSITION, VOLTS/DIV for each channel. Now let s get into the details of how to use those controls. 4.1.1 CH1/CH2 MENU CH1 and CH2 are independent in terms of menus and controls, but offer same settings and functions you can choose. We use CH1 as an example. Press CH1 NENU, you have a drop down submenu displayed on the right of your screen next to Function keys. By pressing F1, F2,F3,F4,F5 etc, you can change and select the settings as you can see below: Fig.14 Channel Setting Menu Table 4-1 explains more details of these functions and settings. Function Menu Setting Description Coupling AC DC Ground Block the DC component from input signal. Pass both AC and DC components from input signal Disconnect input signal. Channel OFF Hide and turn off the channel. ON Display and turn on the channel. Probe Inverted 1X 10X 100X 1000X OFF ON Match this to Probe attenuation factor and have a accurate reading of vertical scale. Displayed original waveform. Display inverted waveform. Table 4-1. Functions for Channel settings
User s Manual: OWON Portable Digital Storage Oscilloscope 21 4.1.2 Set Coupling for selected Channel A square waveform is used as an input in this example. Press CH1 MENU button to show submenu CH1 SETUP. Press F1 next to Coupling and select AC, now DC component is blocked from input signal. See Fig. 15 Coupling AC Press F1 again to set DC mode, both AC and DC components get passed. Fig.15 AC Coupling Fig.16 DC Coupling Turn Channel ON/OFF Press CH1 MENU button to show submenu CH1 SETUP. Press F2 next to Channel, choose OFF, now Channel 1 input is disconnected, you see Channel 1 waveform disappears from the screen. Press F2 again for ON, the input comes in and Channel waveform comes back on the screen. Adjust Probe Attenuation settings on Oscilloscope Probe Attenuation settings on your scope should always match what is on the Probe. Refer to Table 4-2 for corresponding settings. For example if the attenuation coefficient on the Probe is 1:1, the setting on your Oscilloscope should be set to 1X. Attenuation Coefficient of the Probe Corresponding Menu Setting 1:1 1X 10:1 10X 100:1 100X 1000:1 1000X Table 4-2 Probe attenuation coefficient Vs Oscilloscope Probe settings To make a change on your oscilloscope, Press CH1 MENU button to show submenu CH1 SETUP. Press F3 next to Probe to change value, set as 1x as it is shown in Fig.17
User s Manual: OWON Portable Digital Storage Oscilloscope 22 Fig.17 Attenuation coefficient of the Probe 4.1.3 Use Inverted Function By using this function you mirror the waveform against its base level. You get an upside down waveform displayed below its base level. Here is how to use the function. Press CH1 MENU to show Submenu CH1 SETUP. Press F4 next to Inverted to turn the function ON. You now have an inverted waveform as it is shown in Fig.19. Press F4 again to change to OFF. You now have the waveform back to its original one as it is shown in Fig. 18. Fig.18 Original Wave Form Fig.19 Inverted Wave Form
User s Manual: OWON Portable Digital Storage Oscilloscope 23 4.1.4 Use Math Functions There are few Math Functions available in our oscilloscope, to help users calculating the input signals from CH1 and CH2. Here is the list of Math Functions supported by our Oscilloscope. See Table 4-3. Setting CH1-CH2 CH2-CH1 CH1+CH2 FFT Description CH1 subtract Channel 2, Green waveform is the result. CH2 subtract Channel 1, Green waveform is the result. Add Channel 2 to Channel, Green waveform is the result. Fast Fourier transform on selected channel Table 4-3 To use Math function, first you have to turn on both Channel 1 and Channel 2 and have input signals coming in from both channels. Oscilloscope would remind you if any of the channels is turned off, just go back to Channel settings and turn it on before next. Press MATH MENU to bring up submenu-wave MATH as shown in Fig 20. Press F1 once, it highlights the CH1-CH2 and a green waveform is displayed on the screen as a result of this. Press F1 again to cancel the Math, green waveform disappears. Again, F2 is for CH2-CH1, F3 is for CH1+CH2 etc. Fig.20 Example of Math CH1+CH2
User s Manual: OWON Portable Digital Storage Oscilloscope 24 4.1.5 Use FFT Users find FFT (fast Fourier transform) is very useful function for analyzing the input signal on Oscilloscope. This section here is to take you into details of how to use it. FFT function in this instrument transforms 2048 data points of the time-domain signal into frequency components mathematically which is made of 1024 points ranging from 0Hz to Nyquist frequency. Press MATH MENU to bring up submenu WAVE MENU. Press F4 next to FFT to take you into FFT menu. Table 4-4 gives you the details of FFT Menu. Function Menu Options Description FFT Source Window Format ON OFF CH1 CH2 Rectangle Blackman Hanning Hamming db V rms Turn on Turn off Do FFT on Channel 1 Do FFT on Channel 2 Type of window for FFT. Display in db Display in Vrms Zoom *1 *2 *5 multiple *1 multiple *2 multiple *5 *10 multiple *10 Table 4-4 FFT submenu Press F1 once to turn on FFT, Press again to turn it off. Be aware that only to use FFT when Horizontal Menu is set for main Timebase NOT on Window setting mode. Again, the green waveform is displayed as a result of FFT. Press F2 to switch the FFT between CH1 and CH2. Press F3 to choose WINDOW for FFT, there are four options here, including Rectangle Hamming Hanning and Blackman. We will give details of these options later. Press F4 to switch between db and Vrms.
User s Manual: OWON Portable Digital Storage Oscilloscope 25 Press F5 to zoom in/out, options including multiplied by *1, *2, *5, *10. Adjust the Horizontal knob in horizontal control zone to move the waveform and the shown frequency of M Pos is the exact frequency of the cursor point in the middle of spectrum. Press F1 to turn off FFT, Press MATH MENU to go back to WAVE MATH menu. Window options in FFT There are four options for selecting FFT Window. It is about resolution of frequency and accuracy of magnitude. Depending on the measurements you are looking for and the characteristic of your source signal, you can choose different options. Table 4-5 gives you some basic knowledge on which option you want to choose. Type Characteristics and use Window Type Rectangle Hamming Hanning Blackman Have best resolution for frequencies measurement, but worst for magnitude. Recommend to use for: Measure transients or bursts where the signal levels before and after the event are nearly equal. Equal-amplitude sine waves with frequencies that are very close Random noise within a broadband with a relatively slow varying spectrum. Better for frequency measurement than Hanning, and good for magnitude as well. Recommend to use: Measure sine, periodic and narrow banded random noise. Work well on transients or bursts where the signal levels before and after the event are significantly different. Better resolution for measuring magnitude, but OK frequency measurement. Recommend to use for: Measure sine, periodic and narrow banded random noise. Work on transients or bursts where the signal levels before and after the event are significantly different. Best for measuring magnitude, but worst for frequency. Recommend to use for: Measure predominantly single frequency waveforms and look for higher order harmonics. Here are examples for measuring sine wave with a frequency of 1Khz under the selection of
User s Manual: OWON Portable Digital Storage Oscilloscope 26 four different window for FFT. Fig.21 Rectangle window Fig.22 Hamming window Fig.23 Hanning window Fig.24 Blackman window Notes for using FFT: Use Zoom function for FFT waveform if it is necessary. Use dbvrms for details of multiple frequencies measurement Use Linear rms to compare frequencies. DC or offset affect magnitude of waveform, Use AC mode on source signal instead of DC. Set acquisition mode to AVERAGE to reduce effect of random noise What is Nyquist frequency? The Nyquist frequency is half the sampling frequency of Digital Oscilloscope. It is sometimes known as the folding frequency of a sampling of DSO. The aliasing can be avoided if the Nyquist frequency is greater than the maximum frequency of the signal being sampled.
User s Manual: OWON Portable Digital Storage Oscilloscope 27 CAUSION: While FFT mode is turned on, DO NOT USE THESE SETTINGS: Horizontal Window setting. Change source channel in CH1/CH2 Setup menu. Turn on XY Format. Trigger control SET 50% Auto-scale function. 4.1.6 Use VERTICAL POSITION and VOLTS/DIV Knobs The VERTICAL POSITION controls are used to adjust the vertical level of waveforms, including the captured waveforms and calculated waveforms. The VOLTS/DIV controls are for changing the resolution of vertical scale, the sensitivity of the vertical division steps as 1-2-5. Turning Clockwise to increase vertical sensitivity and anti-clockwise to decrease. When using these controls, the changed value and selected channel are displayed on the bottom left corner of the screen in yellow. Information disappears few seconds after user releases the control. Fig.25 Information displayed for Vertical Position
User s Manual: OWON Portable Digital Storage Oscilloscope 28 4.2 Use Horizontal Controls As you ve known from the last Chapter, HORIZONTAL CONTROLS includes the HORIZONTAL MENU, HORIZONTAL POSITION and SEC/DIV. Now our focus is on details of these controls. Press HORIZONTAL MENU to active TIME MODE shown as below with description of each function: Function Menu Main Time Base Set Window Zone Window Setting Description Captured waveform horizontal display is based on time. To define a window of your interests for Zoom out, between two vertical lines. Set full screen view for selected window. Fig.26 Time Mode 4.2.1 Main Time Base Press the F1 next to Main TimeBase to active, Main Time Base. To set up the main window, you can use HORIZONTAL POSITION for position and SEC/DIV the time, available from 5ns to 5s as shown in Fig. 27 Fig.27 Main Time Base
User s Manual: OWON Portable Digital Storage Oscilloscope 29 4.2.2 Set up Window Press F2 next to Set Window to active the function. You will see two yellow vertical lines appear on the center of your screen (you may see one line if they overlap to each other). Use HORIZONTAL POSITION to move the lines left and right.turn SEC/DIV anti-clockwise to increase the distance between two lines while clockwise to decrease.. 4.2.3 Zoom in (Zone Window) Fig.28 Set Window Once the area is selected by using Set Window, Press F3 next to Zone Window, this zooms in to show the selected area in full screen for you to look into more details of your wave form. Fig. 29 shows the result of selected area as you ve see on Fig. 28. Fig.29 Zone Window
User s Manual: OWON Portable Digital Storage Oscilloscope 30 4.3 Use Trigger Controls You are already familiar with trigger controls after reading Chapter 3. These are TRIG LEVEL, SET TO 50%, FORCE TRIG, SET TO ZERO and TRIG MENU. We now are going through each of these controls in details and use them for test. Your oscilloscope can collect data and plot waveform simultaneously. The waveform would not be stable and meaningful unless a proper trigger is set up. Very often in the tests, users are interested in events/data after incoming signal has been triggered. Once your Oscilloscope detects a trigger, it starts to acquire data and plot waveform from this particular point, it is what we call- trigger point. 4.3.1 Trigger Menu for PDS5022S PDS6042S PDS6062S PDS6062T There are two types of trigger for models mentioned above-edge Trigger and Video Trigger. Each type has its function menu for users to set them up. Press Trigger Menu to active your trigger settings. Press F1 next to the display to switch trigger from one type to another. Use Edge Trigger Edge trigger is one of the common triggers you would find on Oscilloscope. The Trigger happens when the input signal going over a threshold of Voltage on the set direction. You can choose Rising edge or Falling edge for how you want the trigger to start. Here is the Edge Trigger Menu shown as Fig. 30. Fig.30 Edge Trigger Menu
User s Manual: OWON Portable Digital Storage Oscilloscope 31 Function Menu Source Slope Mode Coupling Setting CH1 CH2 EXT EXT/5 Rising Falling Auto Normal Single AC DC HF Rjc LF Rjc Description Channel 1 as the trigger source. Channel 2 as the trigger source. Use external trigger source. 1/5 of the External Trigger Source for increasing range of level. Trigger on the rising edge. Trigger on the falling edge. Acquire data and display waveform with or without a trigger. Acquire data and display waveform when triggering. Acquire date and display waveform when detecting a trigger and stop sampling. Block the direct current component. Unblock all components. Block the high-frequency signal and pass through the low-frequency component. Block the low-frequency signal pass through the high -frequency component. Press to go Down Press to go Back HoldOff 100ns~10s Set interval by using TRIG LEVEL control, value range from 100ns to 10s Holdoff Reset Reset Holdoff time to default value (100ns). Table 4-1 Details of Edge trigger Use Holdoff function A time interval before it responses to next trigger, after system triggered the sytem would ignore the further triggers until the time passes. It provides a chance for user to check the signal in a short period and helps to check some complex signals, such as AM waveform etc. Press Function next to Holdoff to activate and use TRIG LEVEL knob to set time for Holdoff.
User s Manual: OWON Portable Digital Storage Oscilloscope 32 Set up a Rising/Falling for edge trigger Applying Sine Waveform to Ch1 Press TRIG MENU to activate your trigger menu. Press F1 next to Type and select Edge. Press F2 next to Channel and choose CH1 for source. Press F3 next to Slope to choose Rising. Press F4 next to Mode to choose Auto. Press F5 to go down next. Press F2 next to Coupling and choose DC. You now have waveform displayed as Fig. 31. Press F3 next to Holdoff and use Trig Level to set time. Fig.31 Waveform when Triggered on Rising Edge Press F1 next to Arrow sign to return to previous menu. Press F3 next to Slope to choose Falling option. Fig.32 Wave Form when Triggered on Falling Edge
User s Manual: OWON Portable Digital Storage Oscilloscope 33 Use Video Trigger Video Trigger is to use with Video format signal (PAL,NTSC and SECAM). It triggers the time base on every single line, specified line or field of input Video signal. In the Trigger mode, Press Function key next to Type to select Video to set up Video Trigger for input video signal. Fig. 33 shows the set-up menu for Video Trigger. Fig.33 Video Trigger Sub-menu Function Menu Setting Description CH1 CH1 as the trigger source Source CH2 CH2 as the trigger source EXT External channel as the trigger source. EXT/5 1/5 of the External Trigger Source for increasing range of level. Sync Line Field Odd field Even field Line NUM Trigger the time base on the line of input video signal. Trigger the time base on the field of input video signal. Trigger the odd fields of input video signal. Trigger the even fields of input video signal. Trigger the time base on chosen line of input video signal. Modulation NTSC/PAL/SECAM Format of video signal. Move to next submenu Back to previous menu. HoldOff 100ns~10s Set interval by using TRIG LEVEL control, value range from 100ns to 10s HoldOff Reset Reset hold time to default value (100ns). Table 4-2 Details of Video Trigger Menu
User s Manual: OWON Portable Digital Storage Oscilloscope 34 Set up a Video Trigger We now take you through an example to set up a video trigger for triggering the field. Apply NTSC video to Channel 1. Press the TRIG MENU to activate TRIG MODE. Press F1 next to Type to select Video for the trigger type. Press F2 next to CH SEL and select CH1 for trigger source. Press F3 next to Sync and select Field. Now you have the result shown as Fig. 34. Fig.34 Example of Video Trigger (Sync mode:field)
User s Manual: OWON Portable Digital Storage Oscilloscope 35 4.3.2 Trigger Menu for PDS7062T PDS7102T Triggers and their submenus for these models are different with others. There are two trigger modes Alternating and Single. Each mode has Edge and Video trigger respectively. Single Trigger This is used to capture steady waveforms in two channels simultaneously. You can use either Edge Trigger or Video trigger depending on your application. Edge Trigger Here is the Edge Trigger Menu in PDS7062T and PDS7102T. Fig.35 Edge Trigger Menu Function Menu Setting Description CH1 CH1 as the trigger source Source CH2 CH2 as the trigger source EXT External channel as the trigger source. EXT/5 1/5 of the External Trigger Source for increasing range of level. Type Edge Set vertical channel trigger type as Edge trigger. Slope Rising Trigger on the rising edge. Falling Trigger on the falling edge. Auto Acquire data and display waveform with or without a trigger. Trig mode Normal Acquire data and display waveform when triggering. Single Acquire date and display waveform when detecting a trigger and stop sampling. Coupling AC DC HF Rjc LF Rjc Block the direct current component. Unblock all components. Block the high-frequency signal and pass through the low-frequency component. Block the low-frequency signal pass through the high -frequency component. Sensitivity 0.2div~1.0div Set sensitivity for trigger Holdoff 100ns~10s Set interval by using TRIG LEVEL control, value range from 100ns to 10s Holdoff Reset Reset holdoff time to default value (100ns) Table 4-3 Details for Edge Trigger menu in Single mode
User s Manual: OWON Portable Digital Storage Oscilloscope 36 Set up an Edge Trigger under Single Trigger mode Now we take you through to set up a Single Trigger for Channel 1. The source signal is square waveform on Channel, Type-Edge, Slope-Falling, Mode-Auto and DC for Coupling. 1. Press TRIG MENU to activate Trigger menu. 2. Press F1 next to Type to choose Single. 3. Press F2 next to Source to choose CH1. 4. Press F3 next to Type to choose Edge 5. Press F4 next to Slope to Falling. 6. Press F5 for next submenu and F2 next to Trig mode for AUTO. 7. Press F3 next to Coupling to choose DC. Here is the result shown below as Fig.36. Fig.36 Wave Form captured on Falling Edge under Single mode
User s Manual: OWON Portable Digital Storage Oscilloscope 37 Video Trigger Here is the Video Trigger menu under Single Trigger mode. Fig.37 Video Trigger Menu Function Menu Setting Description CH1 CH1 as the trigger source Source CH2 CH2 as the trigger source EXT External channel as the trigger source. EXT/5 1/5 of the External Trigger Source for increasing range of level. Type Video Set vertical channel trigger type as video trigger. Line Trigger the time base on the line of input video signal. Field Trigger the time base on the field of input video signal. Video Type Odd field Trigger the odd fields of input video signal. Sync Even field Trigger the even fields of input video signal. Designed Line Trigger the time base on chosen line of input video signal. Modulation NTSC/PAL/SECAM Format of video signal. Holdoff 100ns~10s Set interval by using TRIG LEVEL control, value range from 100ns to 10s HoldOff Reset Reset holdoff time to default (100ns). Table 4-4 Details for Video Trigger settings under Single Trigger mode
User s Manual: OWON Portable Digital Storage Oscilloscope 38 4.3.3 Set up a Video Trigger under Single Trigger Mode Now we take your through to set up a Video Trigger in Single Trigger mode. The input Video signals are NTSC format both Channel 1 and Channel 2. 1. Press TRIG MENU to activate the Trigger menu. 2. Press F1 next to Type for Single. 3. Press F2 next to Source for CH2. 4. Press F3 next to Type for Video. 5. Press F4 next to Sync and select Field. See Fig.38 for result. Fig.38 Video Triggered waveform (Sync:Field) 6. Press the F2 next to source and change to CH1. 7. Press the F4 next to Sync and change to Line. see Fig. 39 for result Fig.39 Wave Form Triggered in the Video Line
User s Manual: OWON Portable Digital Storage Oscilloscope 39 4.3.4 Alternate trigger Trigger on none-synchronous signals. One of the common uses of this is to capture two waveforms with different frequency from Channel 1 and Channel 2. It provides opportunity for user to look at the different signals to help users on their research and development. Again Edge trigger and Video trigger are available under this mode. When turning on Alternating Trigger mode, two V arrows appears on the screen, one is in red (CH1) and the other is in Yellow (CH2).Here are its submenus and settings. Fig40.Edge trigger options Fig41. Video Trigger options Set up Alternate Trigger Now we take this chance to use this trigger for Channel 1 and Channel 2. We apply 10Khz sine wave to Channel and for CH2 we input a NTSC video signal. Here is how we set them up: 1. Press TRIG MENU to activate TRIG MODE menu. 2. Press F1 next to Type for Alternating trigger. 3. Press F2 next to CH SEL and choose CH1. 4. Press F3 next to Type and set to Edge. 5. Press F4 next to Slope and set to Rising. 6. Press F5 next to go down sign and into submenu. 7. Press F2 next to Coupling and set it to DC.
User s Manual: OWON Portable Digital Storage Oscilloscope 40 8. Press F3 next to Sensitivity and set to 0.5div. 9. Press F4 next to Holdoff and adjust interval by using Trig level Know. Now you ve done all Edge trigger settings for Channel 1, we then move on to Channel 2. 10. Press F1 next to go up back to top level. 11. Press F2 next to CH SEL and select CH2. 12. Press F3 next to Type and set to Video. 13. Press F4 next to Sync and set to Line. 14. Press F5 and go to submenu. 15. Press F2 next to Modulation and set it to NTSC. Now look at your display, two different waveforms are shown as Fig. 42. Fig.42 Edge trigger on CH1 and Video trigger on CH2
User s Manual: OWON Portable Digital Storage Oscilloscope 41 4.4 Use MENUS On the top of control panel, there are few very important controls used for setting up tests, storing data, performing measurement etc, including ACQUIRE, DISPLAY,SAVE/RCL, UTILITY,MEASURE, CURSOR, AUTOSCALE, AUTOSET and RUN/STOP. 4.4.1 Use ACQUIRE Pressing ACQUIRE to activate ACQU MODE shown as Fig.43. The description of the Menu is shown as follows: Function Menu Setting Description Sample Normal sampling mode Peak Detect Use to capture maximal and minimal samples. Finding highest and lowest points over adjacent intervals. Average Use to reduce random noises, four options are available as followed. Averages 4, 16, 64, 128 Four options, indicating the number of averages. Fig. 43 Table 4-5 ACQU MODE Here is an example for using Peak Detect function, the input is a standard test square waveform. You can see the burrs on the falling edge of signal is detected with noise when it is turned on. Fig.44 Peak Detect mode.
User s Manual: OWON Portable Digital Storage Oscilloscope 42 Fig.45 Normal ACQU Mode Fig.46 Average on with reduced noise on waveform 4.4.2 Use DISPLAY Press DISPLAY once to activate DISP SETUP menu as shown on Fig. 47 Function Menu Setting Description Type Vectors The adjacent sampling points are joined by vector form. Dots Only displaying sampling points captured. OFF Persist 1sec Options for setting the persistence time for each 2sec sampling point. 5sec Infinite Format YT Show waveform as Voltage against time. XY Show waveform as CH1(X) against CH2(Y) Carry Bitmap Transmit data in Bitmap. Vectors Transmit data in Vector. Fig.47 Battery ON OFF Show Battery level Turn off Battery level Display Menu Table 4-6. Details of Display Menu
User s Manual: OWON Portable Digital Storage Oscilloscope 43 Display Type Press F1 next to Type to change from Vectors to Dots. Fig.48 and Fig.49 show waveform in different type. Fig.48 Waveform Displayed in the Vector Fig.49 Waveform Displayed in Dots Display Persist When Persist is turned on, the captured sample points remain on the screen till it is turned off or time off. There are four options for persistence time. When Infinite is chosen, the sample points stay till it s off. Fig.50 Example of Persist is on and set as Infinite
User s Manual: OWON Portable Digital Storage Oscilloscope 44 4.4.3 Display Format YT is the common format to display data as Voltage against Time on the screen. It applies to both Channel 1 and Channel 2. When setting to XY format, CH2 (Y) against CH1(X). and be ware that certain settings would be changed, for example, the oscilloscope is turned to sample mode with no trigger applied, the data are displayed as bright dots and the by default the sampling rate is 1MS/s and remain unchanged till user changes the format back to YT. Notes: The following functions would be disabled when XY Format is set. Reference or Any calculated wave forms. Cursor Function All Time base controls All Trigger controls Use XY Format Apply input signals to both CH1 and CH2 Press DISPLAY to activate DISP SET menu. Press F1 to set Vectors as Type, F2 to set Infinite for Persist and F3 to set XY as Format as shown in Fig. 51. Fig.51 Display in XY Format
User s Manual: OWON Portable Digital Storage Oscilloscope 45 4.4.4 Use SAVE/RCL Our PDS series Digital Oscilloscope is capable to save up to four wave forms. Stored waveforms can be recalled for review later. To active this function, Press the SAVE/RCL to bring up WAVE SAVE menu. Details of settings and functions are shown as in Fig.52 and Table 4-7. Function Menu Setting Description Source CH1 CH2 MATH Source of wave form to be saved. Available sources: CH1, CH2, MATH WAVE A, B C, D Location where selected waveform to be saved or recalled. Save Action to save selected waveform to selected location. Fig. 52 CH(X) X=A,B,C,D OFF ON Turn Display on/off for selected and stored waveform. Save a waveform Table 4-7 SAVE/RCL A sine wave form inputs to CH1. Follow these steps to save waveform from CH1. Under WAVE SAVE menu, Press F1 next to Source to select CH1. Press F2 next to WAVE to assign Location A for this waveform. Press F3 next to Save to store the waveform captured from CH1. Recall a stored waveform Once the waveform is stored you can recall and display it on the screen. The waveform would remain there until the next one is stored at the same location, hence, the previous stored waveform would be overwritten by the new one. To recall a stored waveform, activate WAVE SAVE menu Press F2 next to WAVE to select from one of four locations, the CH(X) would show the location you ve chosen. Press F4 next to CH(X) to change to ON. Now you will see a stored waveform displayed on the screen with whatever waveforms are already on there.
User s Manual: OWON Portable Digital Storage Oscilloscope 46 Example to save/recall a waveform from location A. Fig. 52 Fig.53 WAVE SAVE/RCL 4.4.5 Use UNTILITY The function provides user an overview of all current system settings. To activate the function, Press UNTILITY to bring up FUNCTION menu as shown in Table 4-8. Function Menu Setting Description Horizontal Display all current Horizontal system settings including Time base, scale and trigger etc. Vertical Current settings for Vertical scale, Coupling, Probe System Status and Math etc Trigger Current Trigger settings, type, source and mode etc. Misc Serial No, firmware version. Recall Factory Reset system settings to factory default. Do Self Cal Carry out internal Calibration according to pre-set procedures. England Fig. 54 Language French German Chinese Support multi-languages, choose you preferred system language. Table 4-8. UTILITY menu and settings
User s Manual: OWON Portable Digital Storage Oscilloscope 47 4.4.6 Carry out a Self-Calibration We have a built-in Self-Calibration procedure, by performing a Self-Calibration would help to maintain the accuracy of your oscilloscope under ambient temperature. It is recommended to carry a self-calibration if the change of the ambient temperature is up to or exceeds 5 C. Notes: DISCONNECT ALL INPUTS BEFORE CARRYING OUT A SELF-CALIBRATION. FAIL TO DO SO MAY CAUSE DAMAGE TO YOUR OSICLLOSCOPE. Here are the procedures for carrying a self-calibration. Disconnect all inputs, including Probes and wires etc. Press UTILITY to activate Function menu. Press F3 next to Do Self-Cal. Now there is a yellow window popping up to ask you for a confirmation. Press F3 again, the Oscilloscope starts the self-calibration and yellow window remains till the calibration is done. PLEASE BE WARE THAT NO CONTACTS TO ANY INPUTS CHANNELS TILL THE CALIBRATION IS DONE. 4.4.7 Use Automatic Measurement This is where users would come across every time they use our scopes. It is to take the measurements by using Oscilloscope. Our oscilloscope does this automatic every time user press MEASURE button. It is capable to work out 20 different types of measurements, and there are 4 measurements can be displayed on the screen at one time. The 20 different types of measurements including: Frequency, Cycle, Mean, Peak-to-Peak value, Root Mean Square, Vmax,Vmin Vmin,Vtop top, Vbase, Vamp, Overshoot, Preshoot, RiseTime, Fall Time, +Width, -Width Width, +Duty, -Duty Duty, DelayA B and DelayA B. To use MEASURE, simply Press MEASURE button would activate MEASURE menu. Press F1 next to Source/Type to allow you to switch between Source and Type. Source is the signal from the channel which user wants to carry out a measurement, and Type is one of the 20 measurements user wants Oscilloscope to work out. Under the Type as you can see in Fig. 57 is what the actual measurement reading is. The reading would show sign of? if there isn t a measurement can be worked out from the source signal. As in Fig. 57, both Channel1 and Channel2 are chosen as source, measurements are taken for Frequency, Pk-Pk value, Mean and RMS.
User s Manual: OWON Portable Digital Storage Oscilloscope 48 Fig.57 Measure Menu Abbreviation Vpp Vmax Vmin Descriptions Peak-to-Peak Voltage Value. The maximum value of amplitude, which is the highest positive peak value of the chosen source The minimum value of amplitude, which is the lowest negative peak value of the chosen source. Vtop Voltage value for the flat top of the chosen waveform, for measuring square/pulse waveform. Vbase Voltage value for the flat base of the chosen waveform, for measuring square/pulse waveforms. Vamp Voltage value between Vtop and Vbase. Overshoot The value of (Vmax-Vtop)/Vamp, for measuring square/pulse waveforms. Preshoot The value of (Vmin-Vbase)/Vamp, for measuring square/pulse waveforms. Average The arithmetic mean value of the chosen source. Vrms The True Root Mean Square voltage value for the chosen source. Rise Time Time that the leading edge of the first pulse takes to rise from 10% to 90% of its amplitude. Fall Time Time that the falling edge of the first pulse takes to fall from 90% to 10% of its amplitude. +Width The width of the first positive pulse at the point of 50% of its amplitude. -Width The width of the first negative pulse at the point of 50% of its amplitude. Delay 1 2 The delay between the two channels at the rising edge. Delay 1 2 The delay between the two channels at the falling edge. +Duty +Duty Cycle, it s (+Width/Period). -Duty: -Duty Cycle, it s (-Width/Period). Freq Period The number of occurrences of a repeating event per unit time The duration of one cycle. Table 4-9 Automatic measurements
User s Manual: OWON Portable Digital Storage Oscilloscope 49 We now take you through an example to use Automatic measurement. Before using them, all sources of channels have to be switched on. These can be done through CH menu as mentioned before. Please be ware that this function only applies to waveform captured from input channels at YT format. It would not work on saved waveforms, calculated waveforms and waveform in XY or SCAN format. In this example, we apply square wave to Channel 1 and sine wave to Channel2, and we want to measure the frequency, Peak-to Peak value of Channel 1, and mean value and RMS value for Channel2. Here is how we set them up: Press MEASURE to activate MEASURE MENU. Press F1 next to Source/Type to highlight Source. Press F2 to choose first source as CH1. Press F3 to choose second source again as CH1. Press F4 to choose third source as CH2. Press F5 to choose fourth source as CH2. Press F1 again to highlight Type. Press F2 to select Freq. A reading of 1.182Khz appears automatically. Press F3 to select Pk-Pk, reading appears immediately under highlighted type. Press F4 to select Mean for CH2, reading appears immediately. Press F5 to select Cyc RMS, reading appears immediately. Fig.58 Automatic Measurement
User s Manual: OWON Portable Digital Storage Oscilloscope 50 4.4.8 Use CURSOR Press CURSOR button on the front panel to activate cursor function menu-curs MEAS on the screen, there are two types of cursors: Voltage and Time. Fig.59 CURS MEAS Menu Functions Setting OFF Type Voltage Time CH1/ Source CH2 Delta Cursor 1 Cursor 2 Description The cursor is off, no measurement taking. Turn on horizontal cursors and display their voltage value. Turn on Vertical cursors and display their time value. Source signal for cursor measurement. Absolute value of the difference between two cursors. Reading of Cursor 1. Time: read time from start position-the horizontal trigger point (0s). Voltage: read voltage from ground level(0 v) Read the position of Cursor 1 (the Time is read with reference to the horizontal trigger position and the Voltage is to the ground point). Table 4-10. Description of Cursor functions
User s Manual: OWON Portable Digital Storage Oscilloscope 51 You can adjust the positions of Cursors by using POSITION controls, marked with CURSOR1 and CURSOR2. Now we take you through two examples to set up and use cursors for Voltage and Time measurements respectively. An input signal of sine waveform is used throughout this example. Voltage Cursor measurement Press CURSOR to activate CURS MEAS menu. Press F1 to select Voltage as Type, there are two purple horizontal lines appeared on the screen, representing CURSOR 1 (on the top) and CURSOR 2(on the bottom) Press F2 to select CH1 as the source. The results are Delta:46.00v, Cursor1:22.40v, Cursor 2: -23.60v. (See Fig. 60) Fig.60 Voltage Cursor Measurements Time Cursor Measurements Press CURSOR to activate CURS MEAS menu. Press F1 to select Time as Type, there are two purple Vertical lines appeared on the screen, representing CURSOR 1 (on the left) and CURSOR 2(on the right) (Fig. 61) Press F2 to select CH1 as the source. Move CURSOR1 and CURSOR2 and The results change accordingly as in Fig. (Delta: Freq: 1.163Khz, 0.86ns. Cursor1 0.000ns, Cursor2 0.860ns) Fig.61 Time Cursor Measurements
User s Manual: OWON Portable Digital Storage Oscilloscope 52 4.4.9 Use Autoscale This is a very useful function for first time users to carry out a simple and quick test on the input signal. It tracks the incoming signal and set up all settings to measure the signal automatically. The settings include Trigger mode, Division for Voltage and Time scale based on the Type of the signal, the Amplitude of the signal and Frequency of the signal. Function Menu Setting Instruction Autoscale Mode OFF ON Vertical Horizontal HORI VERT Turn off Autoscale Turn on Autoscale Only adjust Vertical scale according to input signal. Only adjust horizontal scale according to input signal. Adjust both vertical and horizontal scales according to input signal. Display Only one or two cycles in waveform. Wave Display Multi cycles in waveform Table 4-11 Details of Autoscale settings The functions can work on both Channel 1 and Channel 2 simultaneously. Here is an example for how to use the function: Press Autoscale to activate its menu. Press F1 next to Autoscale to select ON. Press F2 next to mode to select Horizontal- Vertical for Mode item. Press F3 to choose and Press F3 to change to. See Fig. 62/63 for details Fig.62 Multi cycles mode Fig.63 single cycle mode Examples of Autoscale
User s Manual: OWON Portable Digital Storage Oscilloscope 53 Notes: Things you should be ware when turning on Autoscale. The symbol is flickering on the top left corner of screen every half second. The Oscilloscope is setting Triggers automatically for the incoming signal based on its best approach. Access from front panel to trigger controls is disabled. A warning message will be displayed on the bottom left corner of the screen when trying to change submenus of Trigger controls. If the display mode is in XY and STOP is turned on, pressing AUTO SET to enter into Autoscale. The Oscilloscope will be set to YT mode and AUTO triggering. Oscilloscope is set as DC coupling with AUTO Triggering. A warning message is displayed when trying to change these settings. The oscilloscope will turn off Autoscale if user is trying to adjust vertical position, voltage division, trigger level or time scale for CH1 or CH2. To back to Autoscale, Press AUTOSET. The Oscilloscope is always on main time base. The Oscilloscope is turned into Peak Detection mode if it is in Average mode.
User s Manual: OWON Portable Digital Storage Oscilloscope 54 4.5 Use Executive controls These controls include AUTOSET, RUN/STOP. 4.5.1 AUTOSET It s a very useful and quick way to apply a set of pre-set functions to the incoming signal, and display the best possible viewing waveform of the signal and also works out some measurements for user as well. Table 4-12 gives the details of functions applied to the signal when using AUTOSET. Function Items Acquisition Mode Vertical Coupling Vertical Scale Bandwidth Horizontal Level Horizontal Sale Trigger Type Trigger Source Trigger Coupling Trigger Slope Trigger Level Trigger Mode Display Format Setting Current DC Adjust to the proper division. Full Middle Adjust to the proper division Current Show the minimum number of channels. Current Current Mid-point Setting Auto YT Table 4-12. Functions of AUTOSET 4.5. 2 RUN/STOP: Enable or disable sampling on input signals. Notes: When there is no sampling at STOP state, user is still able to change vertical division or time base for waveform within a certain range. If the time base is =<50ms, the time base can be adjusted 4 divisions downwards.
User s Manual: OWON Portable Digital Storage Oscilloscope 55 5. Quick Start 5.1 Example: Measuring a Simple Signal The purpose of this example is to measure the frequency and Peak-to-Peak value of a given signal. Step 1 Go to CH1 MENU and Probe menu to set attenuation coefficient as 10X, turn the switch on the Probe to 10X as well. Step 2 Connect the Probe through Channel 1 to the signal source. Step 3 Press AUTOSET button to let Oscilloscope run through a pre-set functions and apply them to incoming signal. Step 4 Take the measurements by going through these settings. Press MEASURE to activate measurement function menu. Press F1 next to Source to highlight Source. Press F2, F3, F4 and F5 one by one to set them to CH1. Press F1 again and highlight Type. Press F2 and set to Freq. Press F3 and set to Period. Press F4 and set to Mean. Press F5 and set to Pk-Pk. Now you have your measurement results displayed in Fig.64 Fig.64 Measure Frequency and PK-PK value for a given signal.
User s Manual: OWON Portable Digital Storage Oscilloscope 56 5.2 Example: Working out the Gain of a Amplifier in a Metering Circuit The purpose of this example is to work out the Gain of an Amplifier in a Metering Circuit. First we use Oscilloscope to measure the amplitude of input signal and output signal from the circuit, then to work out the Gain by using given formulas. Step 1 Go to Both CH1 MENU and CH2 MENU and then their Probe menu to set attenuation coefficient as 10X, turn the switch on the Probes to 10X as well. Step 2 Connect the Probe1 through Channel 1 to its signal source-the input signal in the circuit. And Probe 2 through Channel 2 to its signal source-the output signal in the circuit. Step 3 Press AUTOSET button to let Oscilloscope run through a pre-set functions and apply them to both signals coming into Channel 1 and Channel 2. Step 4 Press MEASURE to activate measurement function menu. Press F1 next to Source to highlight Source. Press F2 to set Source as CH1. Press F3 to set Source as CH2. Press F1 to highlight Type. Press F2 to set Pk-Pk. Press F3 to set Pk-Pk. Get Pk-Pk readings of Channel 1 and Channel 2. (see Fig.57). Fig. 57 Measuring input and output signal in a metering circut Step 5 Calculate the gain for amplifier using this formula. Gain = Output Signal / Input signal (52.00v/5.200v)=10 Gain (db) = 20 log (gain) =20xlog(10)=20 (db)
User s Manual: OWON Portable Digital Storage Oscilloscope 57 5.3 Example: Capturing a Single pulse It s quite easy to use Digital Oscilloscope to capture non-periodic signal, such as a pulse and burr etc. But the common problem is how to set up a trigger if you have no knowledge of the signal? With various functions supported by our Oscilloscope, user can solve this problem by taking an easy approach. First to run your test using auto trigger to find out the closest trigger level and trigger type, this helps user to make few small adjustments to achieve a proper trigger level and mode. Here is how we achieve this. Step 1 Go to Both CH1 MENU and CH2 MENU and then their Probe menu to set attenuation coefficient as 10X, turn the switch on the Probes to 10X as well. Step 2 Connect the Probe1 through Channel 1 to its signal source and adjust VOLTS/DIV and SEC/DIV controls to set up a proper range of Voltage and time base for the signal. Step 3 Press ACQUIRE to use ACQUIRE MODE, then F2 to select Peak Detect. Step 4 Press TRIG MENU to activate Trigger MODE, F1 to select Single, F2 to choose CH1 as a source, F3 to select Edge for the type, F4 to set Rising for the slope and finally adjust the trigger level to the roughly 50% of the incoming signal. Step 5 Check the Trigger State Indicator on the top of the screen, if it is not Ready, push down RUN/STOP and start Acquire, wait for trigger to happen, if not adjust the level repeat Step 5 again until a sampled signal captured and display on the screen. By using this approach, a random pulse can be easily captured. For instance, if we want to find a burst burr of high amplitude, set the trigger level to a slightly higher value of the average signal level, Press RUN/STOP and wait a trigger, once it happens, a triggered waveform would be captured. User also can change the Horizontal triggering position to have more details of how and when the burr happens. (Fig.66 gives you more details). Fig.66 Capturing a Single pulse
User s Manual: OWON Portable Digital Storage Oscilloscope 58 5.4 Example: Noise analysis and reduction Noise is very common inside most of the electronic signal. To find out what s inside the noise and reduce the level of noise is very important function our oscilloscope is capable to offer. Noise Analysis The level of noise sometime indicates a failure of electronic circuit. The Peak Detect functions acts an important role to help you to find out the details of these noise. Here is how we do it: Step 1 Apply Square waveform to CH1 as source signal, Press ACQUIRE button to activate ACQU MODE menu. Step 2 Press F2 to select Peak Detect function. The signal displayed on the screen containing some noise, by turning on Peak Detect function and changing time base to slow down the incoming signal, any peaks or burr would be detected by the function. (See Fig.67). Fig.67 Signal with Noises
User s Manual: OWON Portable Digital Storage Oscilloscope 59 Reduce the effect of noise from your signal When focusing on signal itself, the important thing is to reduce the noise level as lower as possible, this would enable user to have more details about the signal. The Average function offered by our Oscilloscope can help you to achieve this. Here are the steps for how to enable Average function. Step 1 Apply square waveform to CH1 as a source signal. Press ACQUIRE button to bring up ACQU MODE menu. Step 2 Press F3 select Average, Press F4 to select number of data points for average. Available choices of number are 16, 32, 64 and 128. The higher the number, the better result user will get. User would see a much reduced random noise level and make it easy to see more details of the signal itself. As it is in Fig. 68, after applying Average, user can easily indentify the burrs on the rising and falling edges of some part of the signal (see Fig.68). Fig.68 Reduce Noise level by using Average function. ]
User s Manual: OWON Portable Digital Storage Oscilloscope 60 5.5 Example: Examine the Phase shift between two related signals X-Y mode is a very useful when examining the Phase shift of two related signals. This example takes you step by step to check out the phase change of the signal after it passes a specified circuit. Input signal to the circuit and output signal from circuit are used as source signals. Step 1 Set up attenuation coefficient to 10X through Probe menu for both CH1 and CH2. Switch Probes to 10X. For source signals, CH1 takes in input signal to the circuit and CH2 takes in output signal from circuit. Step 2 Press AUTOSET, Adjust the VOLTS/DIV for both CH1 and CH2 to the same amplitude level to get an ellipse. Step 2 Press DISPLAY to activate DISP SET menu, then F3 to select XY mode. Now the waveform is displayed as Lissajou s curve, adjust VOLTS/DIV and VERTICAL POSITION to get the best possible display, work out the phase shift as in Fig. 69 The signal must be centered and are kept in the horizontal direction. Fig.69 Lissajous Graph Sine (q) =A/B or C/D Where q is the angle of phase shift, A, B, C, and D as them in Fig.69. The angle of phase shift q =± arcsine (A/B) or ± arcsine (C/D).
User s Manual: OWON Portable Digital Storage Oscilloscope 61 5.6 Example: Triggering Video Signal outputted from a TV set The Oscilloscope supports both Video Field trigger and Video Line trigger. Video signal from TV is used as a source signal. The function triggers the input video signal to get a proper signal displayed for further analysis. Use Video Field Trigger Here are how to set up this trigger: Press TRIG MENU to bring up the TRIG MODE. Press F1 to select Single for type. Press F2 to select CH1 as a Source. Press F3 to select Video for Type. Press F4 to select Field for Sync. Adjust VOLTS/DIV, VERTICAL POSITION and SEC/DIV to get the waveform displayed properly (see Fig.70). Fig.70 Waveform captured by using Video Field Trigger
User s Manual: OWON Portable Digital Storage Oscilloscope 62 Use Video Line Trigger Here are how to set up this trigger: Press TRIG MENU activate TRIG MODE menu. Press F1 to select Single for type. Press F2 to select CH1 as Source. Press F3 to select Video as type. Press F4 to select Line for Sync. Adjust controls VOLTS/DIV and VERTICAL POSITION and SEC/DIV to get the waveform displayed properly. Fig.71 Waveform captured by using Video Line Trigger
User s Manual: OWON Portable Digital Storage Oscilloscope 63 6. Troubleshooting Oscilloscope is powered on but no Display. Check power socket/power are connected and make sure all switches are on. If the problem persists, please contact our Customer Support & Service Team. Oscilloscope is powered on, the backlight is on, but can t see anything as screen is too bright or dark. (Model PDS5022s, PDS6042s and PDS6062s) Brightness level of display is wrong. Please adjust the brightness control under the display to the right level. Oscilloscope is powered on and application is running, only two flat lines, but no waveform displayed. First to check Probes contact to make sure the connections are OK and the signals are coming through BNC connector. Second to check the source signal is connected properly to Probes. The Voltage reading is 10 times or 1/10 of the actual value. Look at the attenuation coefficient for the input channel and the attenuation ration of the probe, to make sure they are match. There is a wave form displayed on the screen, but jumping up and down. Check your trigger settings to make sure you are using the right source and right choice of settings. Waveform stops and no change whatsoever when pressing RUN/STOP. Check the Polarity settings in TRIG MODE menu and make sure the trigger level is within the range of your input signal. Or Press AUTOSET for a quick check. The displaying of waveform seems getting slow after increasing AVERAGE value in ACQU MODE or a longer time is set in the DISP MODE. It s normal as the Oscilloscope is working hard on many more data points you ve included.
User s Manual: OWON Portable Digital Storage Oscilloscope 64 7. Appendix A: Specifications Unless otherwise specified, the specifications applied are for PDS series only, and Probes attenuation set as 10X. It is recommend to leave the Oscilloscope running at least 30minutes before carrying out your measurements. Do a Self-calibration if change of ambient temperature exceeds 5. Characteristic Bandwidth 25MHz --PDS5022S 40MHz --PDS6042S Instruction 60MHz --PDS6062S, PDS6062T, PDS7062T 100MHz --PDS7102T Channel 2 + 1 (External) Acquisition: Mode Sample rate (real time) 100MS/s -- PDS5022S Normal, Peak detect, Averaging 250MS/s-PDS6042S, PDS6062S, PDS6062T 500MS/s -- PDS7062T, PDS7102T Input coupling DC, AC, Ground Input: Horizontal System: Vertical system: Input impedance Probe attenuation factor Max. input voltage Sampling rate Interpolation Record length Scanning speed(s/div) Sampling rate / relay time accuracy Interval( T)accuracy (DC~100MHz) A/D converter Sensitivity 1MΩ±2%,in parallel with20pf±5pf (PDS5022S, PDS6042S,PDS6062S,PDS6062T) 1MΩ±2%,in parallel with 15pF±3pF(PDS7062T,PDS7102T) 1X,10X,100X,1000X 300V (PK-PK) (DC + AC PK-PK) 1S/s~500MS/s (sin x)/x 6K points per channel. 5ns/div~100s/div, step by 1~2.5~5( PDS5022S) 5ns/div~100s/div, step by 1~2~5 (PDS6042S, PDS6062S, PDS6062T, PDS7062T, PDS7102T) ±100ppm Single:±(1 interval time+100ppm reading+0.6ns) Average>16:±(1 interval time +100ppm reading+0.4ns) 8 bits resolution (2 Channels simultaneously) 5mV/div~5V/div(at input)
User s Manual: OWON Portable Digital Storage Oscilloscope 65 ±10div(5mV/div~5V/div) (PDS5022S) Displacement ±50V(500mV~5V),±2V(5mV~200mV) (PDS6042S, PDS6062S, PDS6062T, PDS7062T, PDS7102T) Single bandwidth Low Frequency Full bandwidth 5Hz (at input, AC coupling, -3dB) 14ns----PDS5022S Rise time (at input, Typical) 8.75ns---- PDS60462S 5.8ns---- PDS6062S, PDS6062T, PDS7062T 3.5 ns----pds7102t DC accuracy ±5%(PDS5022S, PDS6042S, PDS6062S, PDS6062T) ±3%(PDS7062T, PDS7102T) The voltage difference ( V) between any two points on the wave DC accuracy (average) form after averaging the captured wave forms of more than 16: ± (5% Reading + 0.05 divisions) (PDS5022S, PDS6042S, PDS6062S,PDS6062T ±(3% Reading + 0.05 divisions) (PDS7062T, PDS7102T) Type Edge Video Rising Falling Line synchronization, Field synchronization, Odd field, Even field, Any line Edge trigger Sensitivity Adjustable:0.2div~1.0div Trigger Coupling Trigger level range DC, AC, LF Rjc, HF Rjc Internal ±6div from the center of screen EXT ±600mV EXT/5 ±3V Trigger level Accuracy (typical) : Internal EXT EXT/5 ±0.3div ±(40mV + 6% of Set Value) ±(200mV +6% of Set Value) Horizontal Trigger displacement Trigger Holdoff range Pre-trigger : 655 div Post-trigger : 4 div 100ns~10s
User s Manual: OWON Portable Digital Storage Oscilloscope 66 50% level setting (typical) Input signal frequency 50Hz Trigger sensitivity (Video trigger, typical) Signal system Internal EXT EXT/5 Peak-peak value of 2div 400mV 2V NTSC, PAL, SECAM (any frequency) Measurement Alternate trigger Cursor Automatic Waveform Math Waveform storage Lissajou s figure CH1 trigger CH2 trigger Bandwidth Phase difference Edge, Video Edge, Video V and T between cursors Peak-to-peak value, average value, root mean square value, frequency, period,vmax, Vmin, Vtop, Vbase, Vamp, Overshoot, Preshoot, RiseTime, Fall Time, +Width, -Width, +Duty, -Duty, DelayA B and DelayA B +, -, Invert,FFT 4 waveforms Full bandwidth ±3 degrees Probe compensation PC interface Output voltage (typical) Frequency ( typical) USB1.1 5V, with the Peak-to-peak value 1MΩ 1KHz square wave General Specifications Display Model PDS5022S, PDS6042S, PDS6062S PDS6062T,PDS7062T, PDS7102T Display Type 7.8 color liquid crystal display 8 color liquid crystal display Display Resolution 640 (horizontal) 480 (vertical) pixels Display Color 256 colors 65536 colors, TFT screen Display Language English, Simplified Chinese
User s Manual: OWON Portable Digital Storage Oscilloscope 67 Probe compensation Output voltage (typical) Frequency ( typical) 5V, with the Peak-to-peak value 1MΩ 1KHz square wave Power Supply Consumption Fuse Battery 100-240 VACRMS,50Hz,CAT II <15W 1A,T class,250v Optional Environment Temperature Relative Humidity 90% Height Cooling Method Mechanical Specifications Working temperature: 0 ~ 40 Storage temperature: -20 ~ +60 Operating: 3,000 m Non-operating: 15,000 m Normal Air cooling Model PDS5022S PDS6042S PDS6062S PDS6062T PDS7062T PDS7102T Weight 1.6kg 1.7kg 1.8kg 1.7kg Dimension 350mm 157mm 103mm *Manufacturer reserves the right to change the specification at anytime without prior notice.
User s Manual: OWON Portable Digital Storage Oscilloscope 68 8. Appendix B: Accessories Our Oscilloscope comes with a list of accessories which includes: A pair of Passive Probes 1xPC suite Software CD (Windows OS only). 1xUSB cable 1x Power Lead (UK or EU) 1xUser's Manual *Rechargeable battery is optional, NOT included in the standard package, can be purchased separately.
User s Manual: OWON Portable Digital Storage Oscilloscope 69 9. Appendix C: Maintenance and Service Keep Oscilloscope and accessories away from dust, liquid and any dump to avoid damage. Avoid exposing LCD screen under the direct sunlight and heat. Disconnect power before cleaning your Oscilloscope. Use soft wipes to clean any dust from LCD screen, pay extra attention to transparent screen protector. Only use soft wipes to clean the surface of Oscilloscope, No any surface cleaners should be used. Warning: MAKE SURE YOUR OSCILLOSCOPE IS KEPT IN DRY CONDITION AT ALL THE TIME, FREE FROM WET/DAMP. ALWAYS CHECK ITS CONDITION BEFORE POWERING IT ON. CALIBRATIONS It s recommended to calibrate the Oscilloscope every 12 months to maintain its high performance. The built-in Self-Calibration can be carried out at anytime if it becomes necessary, to help your oscilloscope maintain its best possible performance. You can do so if: Every 12 months or every 2000 hours whichever comes first. The change of ambient temperature exceeds 5 C. After service or repairing. Any others if it becomes necessary.
User s Manual: OWON Portable Digital Storage Oscilloscope 70 10. Appendix D: Use Rechargeable Battery All our PDS series Oscilloscope can work on battery, the battery is NOT included in the standard package. User can turn on the battery indicator if there is a rechargeable battery is installed. The indicator therefore gives the level of your rechargeable. Fig 72 Battery level indicator About Your battery The lithium battery may not be fully charged when you receive it. Please always make sure to charge your battery for 12 hours before the first use. (It s recommended to turn on Oscilloscope while charging the battery). You battery can last 4-6 hours depending on your usage after fully charged.,, and indicates the level of your battery. Your battery can still operate up to 5 minutes when is on. Note: When charging battery, please make sure the ambient temperature is within Oscilloscope s working range to avoid overheat. Replace and dispose the rechargeable Battery The Battery is NOT serviceable. Only qualified service engineer can install and replace the battery if it is necessary to do so. In case you have to dispose the battery, please follow instruction to protect the environment.