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Manual for 200MHz 4-Channel Digital Storage

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1. 92 Illustration 1 Measuring simple signals 92 Illustration 2 Observing the delay caused by a sine wave signal passes through the circuit 93 Illustration 3 Acquiring single signals 95 Illustration 4 Reducing random noise of signals 96 Illustration 5 Using the cursors for measurement 98 Illustration 6 Using the X Y function 102 Illustration 7 Vedio signal triggering 104 lllustration8 Using the dual time base function 106 TENMA Tenma DSO Four channel User Manual Item Page Chapter 4 System Prompts and Trouble shooting 108 Definitions of System Prompts 108 Troubleshooting 108 Chapter 5 Upgrading System Software on USB 110 Chapter 6 Technical Indicators 118 AppendixA Technical indicators
2. 118 Appendix B Accessories for Tenma DSO Four channel Digital Storage Oscilloscope 127 Appendix C Maintenance and Cleaning 128 Appendix D Factory Setups 129 Tenma DSO Four channel User Manual Chapter 1 UserGuide Your Tenma DSO Four channel digital storage oscilloscope is a small and compact benchtop device The user friendly front panel enables easy operation This chapter will guide you through basic testing steps This chapter provides notes on the following General inspection e Functional check Probe compensation Automatic setups for waveform display Getting to know the vertical system 0 Getting to know the horizontal system 0 Getting to know the trigger system When beginning to use your Tenma DSO Four channel oscilloscope first familiarize yourself with the operation front panel This chapter briefly describes the operation and functions of the front panel so you TENMA can get started with your Tenma DSO four channel digital storage oscilloscope as quickly as possible Your Tenma DSO Four channel oscilloscope comes with a front panel with at a glance functions for easy operation There are knobs and function keys on the front panel The functions of knobs are similar to other oscilloscopes On
3. Y Offset Usethe MULTIPURPOSE control knob to move the waveform vertically Y level Usethe MULTIPURPOSE control knob to adjust the vertical gratitude factor e Close the reference waveform m Enter the USB menu see Table 2 7 recall the reference waveform stored on the USB device Pre 1 2 Returnto previous page 45 TENMA Table 2 7 Explanatory notes for the USB menu Tenma DSO Four channel User Manual Function Menu Setup Explanatory Note key to set File name Usethe MULTIPURPOSE control knob and F1 the document name to be imported from the USB device P B Qn operation instruction see note 2 z go back tothe REF menu If thereis such a document on the USB device it will be imported Otherwise a I O failure message will appear Note 1 To select an internal storage position choose between 1 and 10 In the case of external storage device plug in the USB device A message saying USB installation complete appears Press F4 on the next page for the import menu and then enter the USB menu Note 2 In the USB menu use the F1 key and MULTIPURPOSE control knob to set the document name Press F1 to select the character positions that need to be changed Use the 46 MULTIPURPOSE control knob to change the selected characters or numerals Note 3 Y Offset Y level OFF REF are operative only after
4. Figure 5 9 Cancel upgrade 3 Figure 5 10 USB device is removed before update 115 TENMA 116 Incorrect update document If the version of the update document on the USB device is incorrect update will fail upon selecting the upgrade document by pressing F5 Figure 3 18 You will see the prompt Incorrect upgrade document Save a correct document on the USB device and repeat the previous steps for upgrade Propram Update System nn RROnnnnn Figure 5 11 Incorrect update document version Failure in reading update document After selecting the update document press F5 to read Tenma DSO Four channel User Manual If the document cannot be read you will see the prompt Sorry upgrade has failed Please contact our after sales service department It may be that our osciloscope does not support your USB device or document reading is unsuccessful due to other reasons You can retry and see if the problem can be solved or use a USB device we recommend If the problem persists contact our after sales service department To resume normal operation power off youroscilloscope and then reboot Program Update System HL JU Figure 5 12 Reading failure 6 Tenma DSO Four channel User Manual Low software version If the version of USB document is lower than that of the oscilloscope update will fail You will be prompted that Software version too low Please read the user manual fo
5. TENMA Operating Math Functions Math functions are displays of x and FFT mathematical results of waveform channels CH1 CH2 CH3 and CH4 and the digitally filtered waveform The menu is as follows TRIG ED F 1 00 Math channel range M munus 0 000 us CHi lt O D mVv Figure 2 10 Math functions 35 TENMA Table 2 2a Explanatory notes for the Math menu 1 Function Menu Setup Explanatory Note To carry out x functions Source 1 Set Source 1 as CH1 waveform Set Source 1 as CH2 waveform Set Source 1 as CH3 waveform Set Source 1 as CH4 waveform Tenma DSO Four channel User Manual Operator Source 1 Source 2 Source 1 Source 2 Source 1 x Source 2 Source 1 Source 2 Source 2 Set Source 2 as CH1 waveform Set Source 2 as CH2 waveform Set Source 2 as CH3 waveform Set Source 2 as CH4 waveform Next page 2 2 ss Go to next page 36 TENMA Tenma DSO Four channel User Manual Table 2 2b Explanatory notes for the Math menu 2 Function Menu Setup Explanatory Note Compress 1 1 Scale the waveform by ratio There arefourratios to choose 1 10 from 1 1 1 10 1 100 1 1000 1 100 1 1000 Y Offset Usethe MULTIPURPOSE control knob to move the waveform vertically Y Level Usethe MULTIPURPOSE control knob to adjust the vertical scale factor Pre 1 2 Returnto previous page 37 TENMA FFT spectrum analysis By using the FFT
6. Table 2 28 Waveform record menu mro m TENMA Explanatory Note Stop recording Playback button 1 When you press this button the system plays back and displays the number of screens to be played back By turning the MULTIPURPOSE control knob you can suspend playback Turn the knob to select display of waveforms in random screen numbering 2 f you wish to continue full playback press F1 to stop and then press F2 Record button Pressthis button then the MENU ON OFF key to record The number of screens recorded is displayed You can record up to 100 screens of data Recorded data will be lost when the oscilloscope is powered off This function is disabled in dual time base roll average and envelop EUM modes 719 TENMA Tenma DSO Four channel User Manual Table 2 29 RTC setup Real Time Clock Function Menu Setup Explanatory Note Display On Off Turn on the time display Time display is disabled when the frequency counter is in use Min amp Hour Press F2 to select minute or hour then adjust with the MULTIPURPOSE control knob Day amp Mon Press F3 to select date or month then adjust with the MULTIPURPOSE control knob Year Press F4 to select and adjust with the MULTIPURPOSE control knob OK Confirm your setting and return to the Utility menu Table 2 30 Auto setup menu Function Menu Setup Explanatory Note Channel Locked Unlock In the unlock mode default status i
7. To observe and measure an unknown signal and to quickly display and measure the signal s frequency and peak to peak value Le To quickly display this signal follow the steps below D o e 92 In the probe menu set the attenuation factor to 10X and setthe switch on the probe to 10X Connect the CH3 probe to the circuitry point to be measured Press AUTO The oscilloscope will carry out auto setup to optimise waveform display In this status you can further adjust the vertical and horizontal range until you get the desired waveform display Tenma DSO Four channel User Manual Voltage and time parameters for automatic measurement Your oscilloscope can automatically measure most display signals To measure signal frequency and peak to peak value follow the steps below Press MEASURE to display the automatic measurement menu Press F2 to enter the measurement type selection menu Use the MULTIPURPOSE control knob to select peak to peak value then press it down to confirm Next use the MULTIPURPOSE control knob to select frequency then press it down to confirm Press MENU ON OFF to exit the selection menu Tenma DSO Four channel User Manual Peak to peak and frequency measurements will now appear at the bottom of the screen as shown in Figure 3 1 IRBED 00v _ MEASURE O 000 pas CH3 4 UUmW M S00 He Figure 3 1 Automatic measurement TENMA Illustration 2 Observing
8. This process can be run selectively when necessary To make calibration more accurate power on your oscilloscope and allow 20 minutes to warm up Then press the UTILIITY button help function and follow on screen instructions 81 TENMA Automatic Measurement Tenma DSO Four channel User Manual As shown below the MEASURE key is the function as a key for auto measurement Read the following crose ACQUIRE enar d instructions to familiarize with all the powerful automatic measurement functions of your Tenma DSO SS man m Four channel digital storage oscilloscope Measurement menu l l l l Figure 2 26 Function key for the sampling Operation Press MEASURE to display 4 function system auto measurement options as shown in Table 2 31 Table 2 31 Measurement menu 1 Function Menu Setup Explanatory Note Display all parameters To quit all parameters press any key or knob Press F2 then use the MULTIPURPOSE control knob to select the desired parameter Press the MULTIPURPOSE control knob to confirm Up to 4 parameters can be displayed on screen simultaneously i e parameter 1 to parameter 4 from left to right Indicators Visual indication of the measurement value s physical properties by lines _ Turron the indicator and select between parameters fandd T Clear Clearalcustomizedparameters Next 272 a 3 82 TENMA Tenma DSO Four channel User M
9. ee Source CH1 CH2 CH3 CH4 Set CH1 CH2 CH3 or CH4 as the signal source trigger signal EXT EXT 5 LINE CH1 amp CH2 CH1 amp CH3 CH1 amp CH4 CH2 amp CH3 CH2 amp CH4 CH3 amp CH4 CH3 and CH4 trigger their respective signals alternately Coupling DC AC L F Reject H F Reject Normal Single Slope Setup See Table 2 16 Enter slope setup Allow AC and DC quantities of the inputsignalto pass Intercept DC quantities of the input signal Reject low frequency quantities below 80kHz of the signal Reject high frequency quantities above 80kHz of the signal Thesystem automatically acquires waveform data when thereis no trigger signal The scan baseline is shown on the display When the trigger signal is generated it automatically turns to trigger scan Thesystem stops acquiring data when there is no trigger signal When the trigger signal is generated trigger scan occurs One trigger will occur when there is an input trigger signal Then trigger will stop TENMA Table 2 16 Slewrate setup Function Menu Setup Explanatory Note SSCS Polarity Rise Select the rising edge within the threshold for trigger Selectthe falling edge within the threshold for trigger Trigger occurs when the signal slew rate within the threshold is greater than the set slew rate Trigger occurs when the signal slew rate within the threshold is smaller than the set slew rate Trigger occurs when the signal slew rate within the threshold e
10. ground level In the case of AC coupling the DC component of the signal will be blocked With this coupling mode you can display the AC component of the signal with higher sensitivity 2 Changethe vertical setup and observe changes of status information You can identify changes of any vertical range by reading the status display column atthe lower corner of the waveform window Turn the vertical VOLTS DIV knob to change the vertical VOLT DIV range You will find that the range in the current status column has changed accordingly Press CH1 CH2 CH3 CH4 REF or MATH and the screen will show the corresponding operation menu sign waveform and range status information Tenma DSO Four channel User Manual Getting to Know the Horizontal System As shown in the figure below there are one button and two knobs in the horizontal control zone The following steps will get you familiar with horizontal time base setup HORIZONTAL LEE EM Figure 1 12 Horizontal control zone on the front panel TENMA The POSITION knob can move all channels MATH waveforms and REF waveforms horizontally Press this knob to quickly return to the centre point MENU horizontal menu to display Window Dual Xbase Holdoff Use the SEC DIV knob to set the SEC DIV gratitude factor for horizontal scan If the window is expanded you can adjust gratitude of the window there 1 Use the horizontal SEC DIV knob to change the ho
11. Press F1 to switch betweenthe mainscreen and expanded window Dual Xbase aa t a Enter the dual time base menu See Table 2 9 BENNETT Hol doff 96 0000ns 1 50000s Usethe MULTIPURPOSE control knob to adjust holdoff time Horizontal parameter interface definitions D Q o Represents the signal frequency currently selected as trigger source Represents the triggering point position of the current waveform Represents the trigger level of the current waveform Distance between the triggering position and the horizontal centre point The time base value of main time base M1 i e SEC DIV TRIG ED l F 1 00054MHz M 200ns 0 000ps WCH lt 000m 4 3 Figure 2 13 Horizontal parameter interface Tenma DSO Four channel User Manual Window Expansion Window expansion can be used to zoom in a band of waveform to check image details Please refer to Figure 2 14 Horizontally expanded section DENEN TRIG ED F 1 00 z 0k Main window Window Extended waveform Expanded window waveform z 200ns 0 000ps CH 26 0000p Figure 2 14 Expanded screen display TENMA The window expansion setting cannot be slower than the main time base setting Maximum magnification multiple is 100x In the window extension mode the display is divided into two zones as shown above The upper part displays the original waveform You can move this zone left and right by
12. TENMA Tenma DSO Four channel User Manual 3 Select bitmap to enter the bitmap export menu see Table 2 24 Note A bitmap can only be exported to a USB device Table 2 24 Bitmap export menu Function Menu Setup Explanatory Note Bitmap Exportthe display waveform to the USB device in bmp format C GNE ae eee EEUU See Table 2 25 Enter the USB menu a NEDMEEMMEEEEMNMKF Table 2 25 USB menu Function Menu Setup Explanatory Note Filename Enter the document name to be imported from the USB device with the MULTIPURPOSE control knob and F1 key For steps see note 2 pecie steps see noie TD Derant s TETUER omp Default is TENMA0000 bmp OK After confirming go back to the save setup menu If there is a USB drive it will be exported to the USB otherwise the prompt I O operation failed will appear 15 TENMA Utility Function Setup As shown below the UTILITY key in the control zone is the function key for utility functions ctos E sirens fins uer LUE A Lake AS OUIRE Jerome DMM E en TT da Figure 2 25 Function key for the sampling system function Press the UTILITY key to pop out the setup menu for utility functions 76 Tenma DSO Four channel User Manual Tenma DSO Four channel User Manual Table 2 26 Utility menu 1 Configure Self Cal Version Erase RTC Setup Next 2 2 Default Set Pre1 2 Back Preference Language okin Menu Display Br
13. The system will move straightto the next step When F5 is pressed as shown in Figure 5 2 the prompt on the right will appear Are you sure you wish to update If yes press F5 otherwise press F1 to cancel upgrade 111 TENMA Tenma DSO Four channel User Manual Program Update System Propram Update System ML gt oe JDL Figure 5 3 Confirming the USB update Figure 5 4 USB upgrade in progress document 6 When update is complete a successful update prompt will appear Upgrade is successfully complete Please 5 When the USB document is confirmed the following remove USB device then power off your oscilloscope and prompt will appear System upgrade is in progress power it back on again to complete the process The Please wait This process may take 3 to 5 oscilloscope program is now updated and system minutes upgrade is complete In the event of update failure follow the steps below 112 TENMA Below are some common causes for update failure 1 No update document Tenma DSO Four channel User Manual If there is no document with the suffix uts the following message will appear when F5 is pressed after powering on Can tfind the valid update file Please ensure there is update file on the USB device then restart the operation Program Update System LEHRER ET Program Update System Figure 5 5 Successful USB update JUL z xo SUL Caution If upgrade fails due t
14. by increasing the horizontal time base 2 If the display type is vector the connection between sampling dots may cause a trapezoidal waveform Set the display type to dot to solve this problem Tenma DSO Four channel User Manual Chapter 5 Using the USB update program The USB upgrade program makes upgrade easier and more flexible To use this function follow the steps below 1 Check the model name software and hardware versions of your oscilloscope in Table 2 26 Download the highest version of the update program document that matches your model software and hardware versions online and store it on the USB device preferably a USB device recommended by us Power off the oscilloscope then insert the USB device Then power on the oscilloscope again The prompt Please press F5 to continue or F1 to cancel appears on the screen as shown in the figure on the right TENMA Tenma DSO Four channel User Manual Program Update System shaluialals a ETET IT EN D l L J LT i LI L u L LJ Figure 5 1 USB update confirmation Figure 5 2 Selection ofthe USB upgrade document After pressing F5 the screen will prompt you to select the update program as shown in the following figure You can now select the required update program with the 4 multifunction control knob then press F5 to move to the next step If there is only one program on the USB device the following screen will not appear
15. cause 5 Restart the acquisition process The measurement voltage amplitude value is 10 times larger or smaller than the actual value Check if the channel attenuation factor corresponds with the probe attenuation you have chosen There is waveform display but it is not stable TENMA Check the trigger source setup in the trigger menu See whether it is the same as the actual signal input channel 2 Check the trigger type Use edge trigger for Ordinary signals Stable waveform display is achieved only when the correct trigger mode is selected 3 Try changing the coupling display to high frequency suppression or low frequency suppression to filter any high or low frequency noise that is interfering with triggering No display after pressing RUN STOP D Check if the trigger mode is set to normal or single in the menu and whether the level exceeds the waveform range If so move the level to the centre or set trigger mode to AUTO 2 Press AUTO to complete the setup 109 TENMA 6 Display speed is slow after average sampling time is enabled 110 DIf average sampling is carried out for more than 32 times the display speed will drop This is normal 2 You can reduce the intervals of average sampling Trapezoidal waveform display This is normal The reason is possibly horizontal time base range is too low You can improve horizontal resolution and enhance the display quality
16. digital filtering menu 1 Function Menu Setup Explanatory Note Set CH1 as filter target Source Set CH2 as filter target Set CH3 as filter target Set CH4 as filter target Filter Type Low pass Set the filter to low pass filtering High pass Set the filter to high pass filtering Band pass Set the filter to band pass filtering Next 2 2 Gotonext page TENMA Tenma DSO Four channel User Manual Table 2 5b Explanatory notes for the digital filtering menu 2 Explanatory Note E Effective only during low pass filtering or band pass filtering Upper Limit Use the MULTIPURPOSE control knob to set the maximum frequency Lower Limit Effective only during high pass filtering or band pass filtering Usethe MULTIPURPOSE control knob to set the minimum frequency Usethe MULTIPURPOSE control knob to move the waveform vertically Usethe MULTIPURPOSE control knob to adjust the vertical gratitude factor Pre 1 2 Returnto previous page 43 TENMA Reference Waveform Display of the saved reference waveforms can be set on or off in the REF menu The waveforms are saved in the non volatile memory of the oscilloscope or an external USB device and are identified with the following names RefA RefB To display Load or hide off the reference waveforms take the following steps 1 Pressthe REF key 2 Press F2 for Load and select the signal source by turning the MULTI
17. information on the operation of the Tenma DSO four channel digital storage oscilloscope Guidance is given in several chapters as follows Chapter 1 User Guide Simple guide to oscilloscope functions and installation Chapter 2 Instrument Setups Guide to operation of the Tenma DSO four channel digital storage oscilloscope Chapter 3 Practical Illustrations Example illustrations are provided to solve various testing problems Chapter 4 System Prompts and Trouble shooting Chapter 5 Servicing and Support Chapter 6 Appendixes Appendix A Technical Indicators Appendix B Accessories for Tenma DSO Four channel Digital Storage Oscilloscope Tenma DSO Four channel User Manual Appendix C Maintenance and Cleaning Appendix D Factory Setup TENMA Tenma DSO Four channel User Manual TheTenma DSO Four channel Digital Storage Oscilloscope Tenma DSOfour channel digital storage oscilloscope offer user friendliness outstanding technical indicators and a host of advanced features They are your perfect tools to complete testing tasks swiftly and efficiently This manual is a user guide for the Tenma DSO digital storage oscilloscope Bandwidth Single channel Sampling Dual channel Sampling Equivalent Sampling Rate Rate Rate 12 8725 100MHz 2GS s 1GS s 25GS s 12 8727 200MHz 2GS s 1GS s S0GS s TENMA Tenma DSO four channel digital storage oscilloscope offer a user friendly front panel with clear indications to a
18. open Tenma DSO Four channel User Manual Use suitable fuses Only use specified fuse types and rated specifications Avoid exposing circuitry When power is on never make contact with exposed adaptor or components When fault is suspected stop operation If you suspecta fault ask a qualified maintenance professional to carry out inspection Maintain good ventilation Do notoperate in humid condition Do not operate in combustible and explosive conditions Keep the product surface clean and dry Safety Messages and Symbols oafety terminology used in this manual The following messages may appear in this manual TENMA appear on the product Tenma DSO Four channel User Manual N Warning Warning statements identify conditions or practices that could result ininjury or loss of life Caution Caution statements identify conditions A N or practices that could result in damage to this unit High voltage Caution Refer to manual dy L Messages on the product The following messages 2 may appear on the product Protective Groundterminal Ground terminal ground terminal for chassis for testing or other properties Danger means potential damage that is immediate Warning means potential damage that is not immediate Caution means possible damage to this product or other properties Icons on the product The following icons may TENMA Preface This manual provides
19. select CH1 for SIGNAL Notes SOURCE Turn the MULTIPURPOSE control knob to select and then press that key to confirm Press F3 then F1 Set DC for COUPLING Press F4 then F1 Set AUTO for MODE Press F5 then F2 Set RISE for SLOPE Tenma DSO Four channel User Manual Icon utility function of the POSITION knob Press this key to quickly return to the centre point Icon utility function of the trigger LEVEL knob Press this key to quickly return to horizontal ground level i e trigger zero level Icon utility function of the MULTIPURPOSE knob Press this key to confirm selection Tenma DSO Four channel User Manual Chapter 2 Instrument Setups You should be familiar with basic operation of the vertical controls horizontal controls and trigger system menu of your Tenma DSO Four channel oscilloscope by now After reading the last chapter you should be able to use the menus to set up your digital storage oscilloscope If you are still unfamiliar with these basic operation steps and methods please read Chapter 1 This chapter will guide you through the following Setting up the vertical system CH1 CH2 CH3 CH4 MATH REF POSITION VOLTS DIV Q Setting up the horizontal system MENU POSITION SEC DIV Q Setting up the Trigger system TRIGGER MENU LEVEL Q Setting up the sampling method ACQUIRE TENMA Setting up the display mode DISPLAY Storage and recal
20. several waveforms and take the average value to display the final waveform You can use this mode to reduce random noise Envelop Mode The oscilloscope acquires multi amplitude waveforms and calculate all sampling points that synchronize with the triggering point The maximum and minimum values are then displayed 67 FENMA Setting the Display System Press the DISPLAY button to pop out the setup menu shown below You can use this menu to adjust As shown below the DISPLAY key in the control the display mode zone is the function key forthe display system Tenma DSO Four channel User Manual vas uiae crose e LE ATURE ums ML IA d DMM _ Laon mm UTL Figure 2 22 Function key for the sampling Table 2 19 Display menu Function Menu Setup Explanatory Note Format YT Voltage relative to time horizontal gratitude is displayed XY There are two groups in X Y display mode The first groupis CH1 for X input and CH2 for Y input The second group is CH3 for X input and CH4 for Y input Type Vectors Sampling points are linked for display Points Sampling points are directly displayed 68 Tenma DSO Four channel User Manual Table 2 19 Display menu gratitude Full Grid Cross Hair Frame Persist 1s 2S 5s Infinite Intensity 1 32 TENMA Explanatory Note Setthe grid display mode of the waveform zone to full grid Cross Hair or frame Waveform onthe screen is refreshed at
21. switch between the Main and Extended Dual Xbase D Enter the dual time base menu See Table 2 9 Eug Holdoff 96 0000ns 1 50000s Use the MULTIPURPOSE control knob to adjust holdoff time 61 TENMA Operation 1 Followthe normal signal synchronization procedure and select the edge and trigger source in trigger MENU Adjust the trigger level to make the waveform display as stable as possible 2 Press the horizontal MENU key to display the horizontal menu 3 Adjust the MULTIPURPOSE control knob in the upper front panel The holdoff time will change accordingly until the waveform display is stable Operation tip Holdoff time is usually slightly shorter than the Large cycle When observing a RS 232 communication signal waveform it is easier to observe if holdoff time is slightly longer than the starting edge time of every data frame 62 Tenma DSO Four channel User Manual Definitions 1 Trigger source The signal used for trigger The signal for trigger can be obtained from various sources input channel CH1 CH2 CH3 CH4 external trigger EXT EXT 5 and LINE etc B input Channel The most common trigger source is to select one of the four input channels The channel selected as trigger source can operate normally whether the input waveform is displayed or not B External Trigger This trigger signal can be input directly through the external trigger input terminal For example y
22. than greater than or equalling to positive pulse Smaller than greater than or equal to negative pulse Pulse width 20ns 10s 122 Tenma DSO Four channel User Manual TENMA Tenma DSO Four channel User Manual Slew Rate Trigger Slewrate condition lt Smaller than gt greater than equalling to Slew rate range 40pV s 1 6kV s Video Trigger Trigger sensitivity video trigger Typical 2 div EXT 400mV EXT 5 2V ON O Video format Supporting standard NTSC and PAL Line ranges are 1 525 NTSC and 1 625 PAL Trigger frequency counter Precision Frequency range Trigger type 123 TENMA Tenma DSO Four channel User Manual Measurement Cursor Manual mode Voltage difference AV between cursors time difference AT between cursors time difference AT countdown Hz 1 AT Automatic mode Cursor display is enabled during automatic measurement Automatic measurement Amplitude maximum minimum top bottom mean peak to peak amplitude average root mean square cycle root mean square area cycle area frequency cycle rising edge falling edge positive pulse negative pulse burst pulse overshoot preshoot duty ratio negative duty ratio positive duty ratio advance measurement phase advance measurement 10 groups of waveforms and 10 setups FFT C a ee 124 Tenma DSO Four channel User Manual Digital Multimeter TENMA DC voltage Range 400mV 4V 40V 400V Precis
23. the trigger level to just higher than the normal signal level Press RUN STOP and begin waiting When a glitch occurs the machine will automatically trigger and record the waveform immediately before and after triggering By turning the horizontal POSITION knob in the horizontal control zone on the front panel you can change the trigger position horizontally to achieve negative delay trigger of various lengths for easy observation of waveform occurring before the glitch 95 TENMA Tenma DSO Four channel User Manual Illustration 4 Reducing random noise of signals If the signal being measured is stacked with random noise you can adjust the setups of your oscilloscope ETD to filter or reduce the noise so it will not cause PaE interference to the signal during measurement Waveform is shown below 0z ri 2 fa ote Dc Coupling Jr TRIGED reco ST ionuRE Made Acquisitian Single Equivalent M 20 0 5 goo ME CHI 49600m li E THE EHE HE HE EHE AF DEI HA DEI 4 ee er F D EI HII HR RE IE EE E EI E 1E E 1 Fe BR I e 14 Figure 3 3 Single signal M 200s O 000 us CHI 10000mv Figure 3 4 Reducing random noise of signals 96 Tenma DSO Four channel User Manual Steps 1 ES As in the previous illustration set the attenuation factor of the probe and Ch1 Connect the signal to ensure stable display of waveform See the previous illustration for operation instruction See the previous
24. the delay caused by a sine wave signal passes through the circuit As in the previous scenario set the probe attenuation factor of the probe and oscilloscope channel to 10X Connect the CH1 to the circuit signal input terminal Connect CH2 to the output terminal Steps 1 To display CH1 and CH2 signals D Press AUTO 2 Continue to adjust the horizontal and vertical range until you getthe desired waveform display 3 Press CH1 to select CH1 Adjust vertical position of the CH1 waveform by turning the vertical position control knob 4 Press CH2 to select CH2 In the same way described above adjust vertical position of the CH2 waveform so that the waveforms of CH1 and CH2 do not overlap This will make observation easier 93 TENMA 2 Observing the delay caused by a sine wave signal passes through the circuit and observing waveform changes D 94 When measuring channel delay automatically Press MEASURE to display the automatic measurement menu Press F5 to enter next measurement menu Press F1 for advance measurement then F1 for delayed measurement In the delayed measurement menu set measurement from CH1 i e from waveform edge rising to Ch2 i e to waveform edge rising Press OK to confirm Delay appears on the screen Tenma DSO Four channel User Manual TRIG ED M unns O 000j 5 CHI ee 4000m Figure 3 2 Waveform delay Tenma DSO Four channel User Manu
25. the function key for the sampling system ICLOSE a MEASURE m STORAGE UTILITY Figure 2 19 Function key for the sampling Press the ACQUIRE key to pop out the sampling setup menu You can use this menu to adjust the sampling mode TENMA Tenma DSO Four channel User Manual Table 2 18 Sampling menu Setup Explanatory Note Acquisition Normal Ordinary sampling mode Peak Peak detect mode Average Setto average sampling with display of the average number of times Envelop Envelop sampling Average number of Setthe average number of times in multiples of 2 i e 2 4 8 16 times In the 32 64 128 256 To change the average number of times use Average mode the MULTIPURPOSE control knob shown on the left in Figure 2 19 Equivalent ON OFF Turn the equivalent sampling mode on or off In this mode selecting alternate trigger e g CH1 and CH2 as the trigger source is disallowed a p By changing the acquisition setup you can observe the consequent changes in waveform display If the signal contains considerable noise you will see the following displays when average sampling is not selected and when 32 time average sampling is selected For sampling waveform display please see Figure 2 20 and Figure 2 21 65 TENMA TRIG ED F 1 001 ET Hormal Equivalent oft H 20 ns 0 000 us CHI 200 00 Figure 2 20 Waveform without average TRIG ED F 1 001 ACQUIRE Acquisitian Ave
26. the right you will find 5 menu operation keys designated as F1 to F5 from top down With these keys you can set up different options of the current menu The other keys are function keys You can use them to enter different function menus or access particular functions directly 13 FENMA Tenma DSO Four channel User Manual Scene amp Figure 1 1 Tenma DSO Four cha Digital Storage Oscilloscope TENMA Tenma DSO Four channel User Manual WARNING HAZARDOUS VOLTAGE INSIDE DO NOT REMCVE VER UNLESS BY SPECIFIED PERGONNEL TO AVOID ELECTRIC SHOCK PROUUT NAME DIGITALE OMA CHO LOBO LINE 4 amp 440Hz AC 100 240V BOVA MAX External trigger USB device communication channel interface Figure 1 2 Back cover of Tenma DSO four channel digital storage oscilloscope 15 TENMA Tenma DSO Four channel User Manual Multifunction Frequently knob Used Menus TENMA 72 8727 200M Hz 2GS s OGITAL STORAGE OSGLLOSCOPE Trigger controls A 4 A wPOSITION POSITION POSITION Horizontal controls O Vertical controls SCALE 4VOLTS DIV gt 4 VOLTS DIV 4 VOLTS DIV lt VOLTS DIV gt 4SEC DIV m ar Hm E ab a Probe compensation Power switch signal output USB Host interface Analog signal input Multim eter input Figure 1 3 Tenma DSO Four cha Digital Storage Oscilloscope Front Panel 16 Tenma DSO Four channel User Manual Displaying the horizontal trigger position Trigge
27. turning the horizontal POSITION knob or increase and decrease the selected zone in size by turning the horizontal SEC DIV knob The lower part is the horizontally expanded waveform Please note that the recognition rate of expanded time base relative to the main time base is now higher as shown in the above figure Since the waveform shown in the entire lower part corresponds to the selected zone in the upper part you can increase the extended time base by turning the horizontal SEC DIV knob to decrease the size of the selected zone In other words you can increase the multiple of waveform expansion 49 TENMA Dual Time Base Function The dual time base function is similar to window extension but there is a fundamental difference In the window extension mode you can magnify the waveform 100 times whereas in the dual time base mode you can magnify details of the waveform being observed by thousands of times In effect the main time base storage depth is increased by thousands of times The dual time base menu and its operation are as follows 50 Tenma DSO Four channel User Manual Talea o eee ENSE Delayed time p CHA d base M2 Main time base M1 l Me Shift Coarse CHI ALL LINE Figure 2 15 Dualtime base Note The Math function is disabled in the dual time base mode TENMA Tenma DSO Four channel User Manual Table 2 9 Explanatory notes for the dual time base menu Function Menu Setu
28. 3 8kg NENNEN With packaging 6 5kg IP Protection IP2X Adjustment Calibration every 1 year is interval recommended Appendix B TENMA Accessories for Tenma DSO Four channel Digital Storage Oscilloscope Standard Accessories Four 1 2m 1 1 10 1 passive voltage probes For details please read the probe manual EN61010 031 2008 standard Rating is 150V CAT Il when the switch is in the 1X position Rating is 300V CAT II when the switch is in the 10X position One international standard power cord One User Manual Tenma DSO Four channel Digital Storage Oscilloscope communication amp control software USB device USB connection cable Two multimeter test lead and current voltage converter module Optional Accessory LAN amp GPIB module 127 TENMA Appendix C Maintenance and Cleaning General Care Do not store or leave the oscilloscope where the LCD display will be exposed to direct sunlight for long periods of time Caution To avoid damage to the oscilloscope or probes do not expose them to sprays liquids or solvents Cleaning Inspect the oscilloscope and probes as often as operating conditions require To clean the exterior surface follow these steps 1 Remove dust on the outside of the oscilloscope and probes with a soft cloth When cleaning the LCD use care to avoid scratching the clear protection film of the LCD 2 Use a dampened but not dripping soft cloth to clean
29. Fast Fourier Transform algorithm you can convert time domain signals YT into frequency domain signals With FFT you can conveniently observe the following types of Signals Measure the harmonic wave composition and distortion of the system Demonstrate the noise characteristics of the DC power Analyse oscillation 38 Tenma DSO Four channel User Manual TRIG ED F 71 001 Fundamental frequency component 1 MHz Third harmonic frequency component 3MHz FFT vertical gratitude unit mV horizontal gratitude unit Hz div Figure 2 11 FFT Frequency MH B fns 0 000 jas CHI 80 0 004w Hamming Linear Ahs Nexto 2 TENMA Tenma DSO Four channel User Manual Table 2 3a Explanatory notes for the FFT menu 1 Function Menu Setup Explanatory Note To carry out FFT algorithm functions Source CH1 Set CH1 as math waveform CH2 Set CH2 as math waveform CH3 Set CH3 as math waveform CH4 Set CHA as math waveform Window Hamming Set Hamming window function Blackman Set Blackman window function Rectangle Set Rectangle window function Hanning oet Hanning window function Vertical coordinate Setthe vertical coordinate unit to linear or V dB V dB Next 2 2 Gotonextpage Table 2 3b Explanatory notes for the FFT menu 2 Function Menu Explanatory Note Y Offset Usethe MULTIPURPOSE control knob to move the waveform vertically rrr Pre 1 2 Be Return to previous page
30. PURPOSE control knob You can choose from 1 to 10 After selecting a numeral for saved waveform e g 1 press the MULTIPURPOSE control knob to confirm and the waveform originally stored in that position can be recalled For instructions on storing or recalling reference waveforms on the USB device read Storage and Recall 3 Press F1 for RefB to select the second signal source for the math function by repeating 44 Tenma DSO Four channel User Manual step 2 To close the reference waveform press OFF In actual application when using your Tenma DSO Four channel to measure and observe such waveforms you can compare the current waveform with the reference waveform for analysis Press REF to display the reference waveform menu For setup please refer to Table 2 6 Note When AUTO is pressed after a waveform is recalled or imported that waveform will remain TENMA Tenma DSO Four channel User Manual Table 2 6a m notes for the REF menu 1 Setup Explanatory Note M LS Wave REFA Select REFA as the reference waveform REF B Select REF B as the reference waveform Load Recall waveforms stored in 10 positions then select one with the MULTIPURPOSE control knob Press the control knob to confirm To display the amplitude and time base contents of the current waveform Next 2 2 Go to next page Table 2 6b Explanatory notes for the REF menu 2 Function Menu Setup Explanatory Note
31. Probe attenuation factor O 000 us CHI 000m H 200 Hz Vertical range movement Figure 2 6 Setting the probe attenuation factor in the channel menu 33 TENMA 4 Vertical VOLTS DIV adjustment setup You can adjust the VOLTS DIV range of the vertical deflection factor either in the coarse tune mode or fine tune mode In coarse tune mode the VOLTS DIV range is 2mV div 5V div Tuning is in steps of 1 2 5 In fine tune mode you can change the deflection factor in even smaller steps within the current vertical range so as to continuously adjust the vertical deflection factor within the range of 2mV div 5V div without interruption TRIG ED F 1 001 Finetune setup do T0005 CHI 4 O D0mv Vertical gratitude factor VOLTS DIV movement Figure 2 7 Coarse tuning and fine tuning the vertical gratitude factor 34 Tenma DSO Four channel User Manual 5 Waveform inversion setup Waveform inversion The displayed signal is inverted 180 degrees Figure 2 8 shows the non inverted waveform Figure 2 9 shows the inverted waveform TRIG ED F 1 007 AD he FULL Coarse 1X OFF Non inverted M POO js D000ps RE CHI A o 00m Figure 2 8 Inversion setup for vertical channel non inverted gratitude factor Tenma DSO Four channel User Manual TRIG ED F 1 00 Inverted H BOO x 0000s WECH v 00m waveform Waveform inversion icon Figure 2 9 Inversion setup for vertical channel inverted
32. TENMA TENMA DSO Four channel OPERATING MANUAL Digital Storage f eii e e el Introduction Dear valued customer Thank you for purchasing a Tenma instrument To use your new product correctly make sure you read this User Manual carefully and completely before operation and pay particular attention to the Safety Instructions section Please keep this User Manual in a safe place after reading it carefully For easy reference during future operation we recommend putting it alongside your Tenma productor in an easily accessible place TENMA Tenma DSO Four channel User Manual Copyright Information e TEMMA enma Allrights reserved e TEMMA products are protected by patents granted and pending in the People s Republic of China and other countries The Company reserves the right to change product specifications and prices TEMMA all rights reserved All licensed software products are properties of Tenma its subsidiaries or supplier They are protected by the national copyright law and international conventions Information contained in this manual supercedes all information in previously published versions TEMMA is the registered trademark of Premier Farnell plc and its subsidiaries TENMA If this product is sold or assigned by the original purchaser to a third party within three years of purchase the new owner should note that warranty is available for a period of three years from the day the origi
33. Y Level Usethe MULTIPURPOSE control knob to adjustthe vertical gratitude factor eee 39 TENMA How to use FFT functions Signals with DC quantities or DC offset will cause error or offset of FFT waveform quantities To reduce DC quantities select AC coupling To reduce random noise and frequency aliasing resulted by repeated or single pulse event set the acquiring mode of your oscilloscope to average acquisition Select the FFT Window Assuming the YT waveform is constantly repeating itself the oscilloscope will carry out FFT conversion of time record of a limited length When this cycleisa whole number the YT waveform will have the same amplitude at the start and finish There is no waveform interruption However if the YT waveform cycle is not a whole number there will be different amplitudes at the start and finish resulting in transient interruption of high frequency at the connection point In frequency domain this is Known as leakage To avoid leakage multiply the original 40 Tenma DSO Four channel User Manual waveform by one window function to set the value to 0 for start and finish compulsively For application of the window function please see the table below Tenma DSO Four channel User Manual Table 2 4 FFT Window Feature Rectangle The best frequency recognition rate the worst amplitude recognition rate Basically similar to a status without adding window Fre
34. al Illustration 3 Acquiring single signals The advantages and special features of your digital storage oscilloscope lie in its ability to acquire non cyclical signals like pulse and glitch To acquire a single signal you must have prior knowledge of that signal to set the trigger level and trigger edge For example if the pulse is a logical signal of TTL level the trigger level should be set at about 2V and the trigger edge should be set to rising edge trigger If you are not certain about the signal you can observe it by automatic or normal trigger to determine the trigger level and trigger edge Steps 1 Asin the previous illustration set the attenuation factor of the probe and CH1 2 Carry outtrigger setup Press MENU in the trigger control zone to display the trigger setup menu 2 In this menu use F1 F5 menus to set the trigger type to edge set trigger source to Ch1 set trigger coupling to DC set trigger mode to TENMA single and set slewrate type to rising Adjust horizontal time base and vertical range to an appropriate range Turn the LEVEL knob to get the desired level Press RUN STOP and wait for a signal that meets the trigger condition If any signal reaches the set trigger level the system will sample once and display it on the screen By using this function you can easily acquire any occasional event For example when a sudden glitch of relatively big amplitude is acquired set
35. al wear and tear of mechanical parts any form of application other than the stated ones improper use improper maintenance or poor maintenance Under the warranty terms and conditions TENMAhas no obligation to provide the following services a Repairing any damage arising from installation repair or maintenance carried out by a non TENMA service representative b Repairing any damage arising from improper use or connection to incompatible equipment Tenma DSO Four channel User Manual c Repairing any damage or malfunction arising from using a power source not provided by TENMA d Servicing a product that has been modified or integrated with other products such modification or integration makes repair more time consuming and difficult This warranty is made available to this product specifically and supercedes all other previous warranties whether express or implied TENMA and its dealers will not make any implied guarantee on the salability or suitability of this product for any specific purpose In the event of breach of warranty terms and conditions repair or replacement of defective product shall be the only and all remedial measure offered by TENMA Notwithstanding any prior notification of potential damage that is indirect special consequential or inevitable TENMA andits dealers shall bear no liability for any such damage TENMA Safety Instructions This unit is designed and manufactured strictly in acc
36. anual Table 2 32 Measurement menu 2 Function Menu Setup Explanatory Note ADV Delay The rising edge or falling edge time interval of a random channel Phase waveform See Table 2 33 Pre 2 2 Confirm your setting and return to the Utility menu Table2 33 Delay menu Setup Explanatory Note From CH1 CH2 Selectone channel waveform as the delayed reference waveform CH3 CH4 Rise fall Take the centre point of 10 90 of the waveform rising or falling edge 5 CH1 CH2 Select one channel waveform as the delayed measurement waveform CH3 CH4 Rise falle Take the centre point of 10 90 of the waveform rising or falling edge Selection of the measurement point of delayed measurement waveform is complete Return to the measurement menu 83 TENMA Note Customised parameters are for quick parameter measurement The measurement menu of your oscilloscope is capable of measuring 26 waveform parameters Two of them delay and phase for advance measurement are generally used when you do not require to measure all parameters but only a few You can set these as customized parameters Customized parameters are displayed on the screen TRIG ED F 1 00 i WE ASURE l 2 00m HW 200s 0 000 us CH lt Figure 2 27 Measurement parameters 84 Tenma DSO Four channel User Manual Automatic measurement of voltage parameters Your Tenma DSO Four channel Oscilloscope can automatically measure the followin
37. ation is impossible with ordinary oscilloscopes 1 To access video signal in CH1 follow the Video line trigger instructions in Illustration 7 Video signal triggering Press MENU in the horizontal control zone to display the time base setup menu Press F3 to enter dual time base setup Press F1 to select dual time base then press F2 to select CH1 Press F3 to set time base gratitude to M1 Adjust the M1 time base range with the SEC DIV knob as shown in Figure 3 13 Then press F3 to select M2 and adjust the M2 time base range with the SEC DIV knob as shown in Figure 3 13 106 9 Tenma DSO Four channel User Manual Shift the M2 time base with the MULTIPURPOSE control knob to show the parts you require to observe in detail When shifting M2 press F5 to choose coarse or fine tune to shift in greater or smaller steps opere RITE SEY Qua XBASE dA ee QE UNES Dual B CETS CHI X Adjust h ie shirt Fine Back E CHI ALL LINE Figure 3 13 Dual time base function Tenma DSO Four channel User Manual Illustration 9 Using the multimeter The multimeter of this digital storage oscilloscope can measure 5 parameters voltage resistance on off diode and DC current The following example shows the steps for DC current measurement 1 Assuming the size of the current to be measured is unknown a current voltage converter module of 4A range should be used Connect
38. chapter for guidance on adjusting the horizontal time base and vertical range Improving trigger by setting trigger coupling Press MENU in the trigger zone to display the trigger setup menu Set trigger coupling to low frequency suppression or high frequency suppression By selecting low frequency suppression a high pass filter is set up t filters low frequency signal quantities under 80kHz and allows high frequency signal quantities to pass through If you select high frequency suppression a low pass filter is set up It filters high frequency signal quantities higher than 80kHz and allows low frequency signal quantities TENMA to pass through By setting low frequency Suppression or high frequency suppression you can suppress low frequency or high frequency noise respectively and achieve a stable trigger Reducing display noise by setting the sampling mode If the signal being measured is stacked with random noise and the waveform is too coarse as a result you can use the average sampling mode to eliminate random noise display and reduce the size of waveform for easy observation and measurement After getting the mean random noise is reduced and details of the signal are clearer Follow the steps below Press ACQUIRE in the menu zone of the front panel to display the sampling setup menu Press menu operation key F1 then F3 to set sampling mode to AVERAGE then press the MULTIPURPOSE control knob to adjust the avera
39. d coupling Tenma DSO Four channel User Manual 2 Setting the channel bandwidth limit Take applying a signal to Ch1 as an example the signal to be tested contains high frequency quantities Press CH1 to turn CH1 on then press F2 and F1 Bandwidth is now set to full bandwidth The signal being measured can pass through even if it contains high frequency quantities The waveform display is as follows E e FOR GND T Full led bandwidth Off H OD 0 000 jas CHi 24 0mV Figure 2 4 Waveform display at full bandwidthdisplayed Tenma DSO Four channel User Manual Press F2 then F3 The noise and high frequency quantities over 20MHz of the signal being tested are now restricted Waveform display is as follows TRIG ED F 1 001 C1 Wee Bandwidth limit 2OMHz 20H Coarse 1X OFF h 00 x 0 0005 CHI lt 000m The BW bandwidth limit icon Figure 2 5 Waveform display when bandwidth limitis on TENMA 3 Setting up the probe rate To match the probe attenuation factor setup it is necessary to set up the probe attenuation factor in the channel operation menu accordingly For example when the probe attenuation factor is 10 1 set the probe attenuation factor at 10X in the channel menu Apply this principle to other values to ensure the voltage reading is correct The figure below shows the setup and vertical range display when the probe is set at 10 1 TRIG ED F 1 001
40. d from the oscilloscope appears Saving When the oscilloscope is saving a waveform this prompt is shown on the screen A progress bar After a USB key is this prompt 108 Tenma DSO Four channel User Manual appears atthe bottom Waiting This prompt appears on the screen during auto calibration A progress bar appears at the bottom I O Failure When USB communication fails or no document meeting specific requirements is found on the USB device this prompt appears Function Disabled When MATH key is pressed in the dual time base mode this prompt appears Troubleshooting 1 If the screen of your oscilloscope remains black without any display after powering on follow the steps below to find the cause Check the power cable connection and check if there is normal power supply 2 Check if the power switch is properly pressed 3 Restart the unit after performing the above checks 2 3 4 Tenma DSO Four channel User Manual If no waveform is displayed after you have acquired a signal follow the steps below to find the cause Check whether the probe is properly connected to the signal lead 2 Check whether the signal lead is properly connected to the BNC channel adaptor 3 Check whether the probe is connected properly to the objectto be measured 4 Check whether the object for measurement is generating signals connect the channel with signals to the questionable channel to find the
41. de you only have to press the RUN button once and the oscilloscope will wait for trigger One sampling will occur and the acquired waveform will be displayed when the digital storage oscilloscope detects a trigger Then trigger will stop Trigger coupling Trigger coupling determines which quantities of the signal are transmitted to the trigger circuit Coupling modes are DC AC low frequency suppression and high frequency suppression DC Allowing all quantities to pass AC Intercepting DC quantities and attenuating signals under 10Hz LF Reject iIntercepting DC quantities and attenuating low frequency quantities under 80kHz HF Reject Attenuating high quantities over 80kHz frequency 63 m TENMA 4 Pretrigger Delayed Trigger Data sampled before after triggering The trigger position is typically set at the horizontal center of the screen In this case you are able to view 6 divisions of pretrigger and delay information Adjusting the horizontal displacement of the waveform with the POSITION knob allows you to see more pretrigger information By observing pretrigger data you can see the waveform before trigger occurs For example you can detect the glitch that occurs when the circuitry starts Observation and analysis of trigger data can help you identify the cause of glitch 64 Tenma DSO Four channel User Manual Setting the Sampling System As shown below ACQUIRE button in the control zone is
42. ect odd field or even field synchronization Turn the SEC DIV knob in the horizontal control zone to adjust horizontal time base for a clear waveform display Tenma DSO Four channel User Manual VIDEO SETUP Standard __RIGED CC 250 PAL 5 Y nec Odd Field LM ERR 0 000 yas CHI OOO FIELD Figure 3 11 Video field triggering TENMA Tenma DSO Four channel User Manual Video line triggering To trigger on the video field follow the steps below 1 Press MENU button in the trigger control zone to ie ae ponga fM display the trigger menu ZEE MEE 2 Press F2 then F3 to set the type to video GE b E 3 Press F2 then turn the MULTIPURPOSE control E din Tm M knob to set trigger source to CH1 Next press the MULTIPURPOSE control knob to confirm 4 Press F5 to enter the video setup screen then press F1 to select PAL as video format 5 Press F2 then F4 to select line synchronization Figure 3 11 Video line triggering 6 Usethe MULTIPURPOSE control knob to select any line 7 Turn the horizontal SEC DIV knob in the horizontal control zone to adjust horizontal time base for a clear waveform display Line Mum h OS O 000 jas CHI LINE 27 105 TENMA Illustration 8 Using the dual time base function In the dual time base mode you can enjoy unrivaled detailed observation of a waveform For example you can observe the colour Burst signal of the video signal clear observ
43. elect voltage as the measurement parameter Percent Select percent as the measurement parameter 87 TENMA Using the Run Button There is a button on the top right corner on the front panel RUN STOP When this button is pressed and a green indicator lights up your oscilloscope is in a running status If a red light comes on after pressing this key it indicates the unit has stopped operation 88 CLOSE DAMM P MULTIPURPOSE naming AGUIRE DIBPLA Figure 2 28 RUN STOP key BTORAOE UTILITY Tenma DSO Four channel User Manual RUN STOP Acquire waveform continuously or stop acquisition If you want the oscilloscope to acquire waveform continuously press RUN STOP once Press the button again to stop acquisition You can use this button to switch between acquiring and stop acquiring waveform In the Run mode a green light comes on and AUTO appears on the screen In the STOP mode a red light comes on and STOP appears on the screen TENMA Tenma DSO Four channel User Manual Auto Setup As shown above Auto Setup can simplify operation base range according to the amplitude and frequency Press AUTO and the oscilloscope can automatically Of the waveform and ensure stable display of the adjust the vertical gratitude factor and horizontal time waveform When the oscilloscope is in auto setup mode the system setup is as follows Table 2 36 Auto setup Acquire Normal Display f
44. erature changes by more than 5 C you must perform the Self Cal operation accessible through the system functions menu All specifications are guaranteed unless noted Typical 118 Tenma DSO Four channel User Manual TENMA Tenma DSO Four channel User Manual Technical Indicators Real time Equivalent CH3 CH4 single channel 2GS s two channels 1GS s When all channels have made N acquisitions simultaneously N is selectable from 2 4 8 16 32 64 128 to 256 Input coupling DC AC GND Input impedance Probe attenuation Maximum input voltage 119 TENMA Waveform interpolation sin x x Recording length 1024k otorage depth 24k Max Equivalent storage depth dual time base Tenma DSO Four channel User Manual ons div 50s div 100MHz At 1 2 5 increment ocanning range s div god of sampling rate and delay t50ppm any time interval gt 1ms ime Time interval AT Single 1 sampling time interval 50ppm x reading 0 6ns Measurement accuracy full bandwidth gt 16 average values 1 sampling time interval 50ppm x reading 0 4ns 120 TENMA A D converter 8 bit resolution Deflection gratitude factor V div Range 2mV div 5V div at input BNC Displacement range 5 div Analog bandwidth 200MHz 100MHz MENS Single bandwidth 100MHz 100MHz NENNEN Selectable analog bandwidth limit Typical 20MHz Low frequency response AC coupling 3dB lt 10Hz at BNC Rise ti
45. field to synchronized trigger All lines Set the line signal to synchronize with trigger Line Num Set synchronized triggeron the specified line and adjust by turning the MULTIPURPOSE control knob 625 lines for PAL 025 lines for NTSC Back Return to video trigger menu Se ISE TUO she VIDEO SETUP When PAL is selected for video and synchronization mode is line you will see a screen display as shown in Figure 2 16 When synchronization mode is field you will see a screen display as shown in Figure 2 17 h ps O 000u RE CH ALL LINE Figure 2 16 Video trigger Line synchronization 57 TENMA TRIG ED F 25 01 Standard PAL Sync dd Field h OS O 000 ps GHi ODO FIELD Figure 2 17 Video trigger Field synchronization 58 Tenma DSO Four channel User Manual Slope trigger If slope trigger is selected trigger occurs when the signal s rising or falling rate meets the set condition For the trigger menu see Table 2 15 below Table 2 15 Slope trigger Tenma DSO Four channel User Manual TENMA Explanatory Note Setto external trigger or divide the external trigger source by 5 Setto AC power trigger CH1 and CH2 trigger their respective signals alternately CH1 and CH3 trigger their respective signals alternately CH1 and CH4 trigger their respective signals alternately CH2 and CH3 trigger their respective signals alternately CH2 and CH4 trigger their respective signals alternately
46. g voltage parameters Peak to peak value Vpp The voltage value from the highest pointto lowest point of the waveform Maximum value Vmax The voltage value from the highest point to ground GND of the waveform Minimum value Vmin The voltage value from the lowest point to ground GND of the waveform Amplitude value Vamp The voltage value from top to base of the waveform Mean Vmid Half ofthe amplitude value Top value Vtop The voltage value from the level top to ground GND of the waveform Base value Vbase The voltage value from the level base to ground GND of the waveform Overshoot The ratio value of the difference between maximum value and top value to the amplitude value Tenma DSO Four channel User Manual Preshoot The ratio value of the difference between minimum value and base value to the amplitude value Average Average amplitude of signals within 1 cycle Root mean square value Vrms The effective value Energy generated by AC signal conversion during 1 cycle with respect to the DC voltage that produces equivalent energy i e root mean square value Automatic measurement of time parameters Your Tenma DSO Four channelOscilloscope can automatically measure the frequency cycle rising time falling time positive pulse width negative pulse width delay positive duty ratio negative duty ratio and 9 time parameters Definitions of these parameters are as follows RiseTime T
47. ge number of times in multiples of 2 97 TENMA i e 2 to 256 until you get the desired waveform display that meets observation and measurement requirements See the figure below TRIGED i ACRUIRE Acquisition Average Averages LES T EE T EE be p Equivalent h Onus O 000 as CHi 100 00mV Figure 3 5 Signal noise suppressed Caution Inthe average sampling mode the waveform display will update at a slower rate This is normal 98 Tenma DSO Four channel User Manual Illustration 5 Using the cursors for measurement Your oscilloscope can measure 28 waveform parameters automatically All auto parameters can be measured with the cursors By using the cursors you can quickly measure the time and voltage of a waveform l Measuring the frequency of a Sinc peak To measure the peak frequency of a Sinc signal follow the steps below 1 Press CURSOR to display the cursor measurement menu 2 Press F1 to activate the cursor measurement function 3 Press F1 again to set cursor type to time 4 Press F3 to set the vertical cursor unit to Hz 5 Turn the MULTIPURPOSE control knob to set cursor 1 at the Sinc first peak Tenma DSO Four channel User Manual 6 Press the MULTIPURPOSE control knob to select cursor 2 then turn the MULTIPURPOSE control knob again to set cursor 2 at the Sinc second peak See the figure below garga ote L s CURSOR Type TRIG ED Ti
48. gle of disparity between the channels For definitions of A B C D see the above figure Calculating with this formula the angle of disparity is 0 t arcsin A or 6 arcsin If the elliptic main axis is within quadrants and III the angle of disparity should be within quadrants and IV i e inside 07 or 3 2m If the main axis is within quadrants Il and IV the angle of disparity should be within quadrants II and Ill i e inside 29m or ne gt lr a amr e Ti 0 180 70 760 i D 60 a OF V v QW VV 0 22 30 ip TENMA X Y Phase difference table p L P K y FU dim F L I re f 4 f i FT i i i wr Uu Wu oO tk ku Ss na Lu NJ D 22 H LEJ Eai 145 r ff NIA f P 1 l Mu U 9 XJ j v LA 15 30 ue I ta 67 30 103 TENMA Illustration 7 Video signal triggering To o trigg outp bserve an individual video circuit use the video er function to obtain a stable display of video ut signal Video field triggering To tr 1 104 igger in the video field follow the steps below Press MENU in the trigger control zone to display the trigger menu Press F2 then F3 to set the type to video Press F2 then turn the MULTIPURPOSE control knob to set trigger source to CH1 Next press the MULTIPURPOSE control knob to confirm Press F5 to enter the video setup screen then press F1 to select PAL as video format Press F2 to sel
49. he circuit Connect CH1 to the input signal of the circuit and connect CH2 to the output signal of the circuit To make testing easier CH1 and CH2 displacements are set in the centre point as shown in Figure 3 8 Follow the steps below 1 Press CURSOR to display the cursor measurement menu 2 Press F1 to activate the cursor measurement function 3 Press F1 again to set cursor type to time Press F3 to set the vertical cursor unit to Degree 5 Turn the MULTIPURPOSE control knob to set cursor 1 at the center point of the first sine rising edge where is crosses with channel ground line a Tenma DSO Four channel User Manual 6 Press the MULTIPURPOSE control knob to select cursor 2 then turn the MULTIPURPOSE control knob again to set cursor 2 at the center point of the second rising edge 7 Press F4 Current position is 100 Set the current Avalue between cursor 1 and cursor 2 to 10095 8 Press CH2 then CURSOR to set the cursor at the CH2 signal being tested Keep cursor 1 stationary and move cursor 2 9 Use the MULTIPURPOSE control knob to set cursor 2 at the center point of the first rising edge of the CH2 signal This A value is the phase difference between the two signals See the figure below TENMA TRIG ED 39 9 CURSOR Type Time am Independent Y Units Degree Current Position 3607 m D I Ww Position 360 M 200m 0 000 ps CHi lt 1 32w Figure 3 8 Usi
50. he probe compensator s signal connector and the ground clamp to the ground cable connector of the probe compensator Activate CH1 then press AUTO 22 Tenma DSO Four channel User Manual 2 Observe the displayed waveform Tin TUM fir Overcompensation Correct Compensation Undercompensation Figure 1 10 Probe compensation calibration 3 Ifyouseean Undercompensation or Overcompensation waveform display adjust the adjustable capacitance tab of the probe with a screwdriver with non metal handle until a Correct Compensation waveform shown in the above figure is displayed Warning To avoid electric shock when measuring high voltage with the probe ensure the probe s insulation lead is in good condition Do not touch the metal part of the probe when connected to HV power Tenma DSO Four channel User Manual Automatic Setup for Waveform Display Your Tenma DSO Four channel digital storage oscilloscope features an auto setup function It can automatically adjust the vertical gratitude factor scanning time base and trigger mode based on the input signal until the most appropriate waveform is displayed The auto setup function can only be operated when the signal to be measured is 50Hz or above and the duty ratio is larger than 1 Using the Auto Setup Function 1 Connectthe signal to be tested to the signal input channel 2 Press AUTO The oscilloscope will automatically set the vertical gra
51. he time taken by the waveform amplitude to rise from 10 to 90 FallTime The time taken by the waveform amplitude to fall from 90 to 10 TENMA Positive Pulse Width Width The pulse width when positive pulse is at 50 amplitude Negative Pulse Width Width The pulse width when negative pulse is at50 amplitude Delay Rising or falling edge Delayed time from waveform to waveform during advance measurement Positive duty ratio Duty Ratio of positive pulse width to cycle Negative duty ratio Duty Ratio of negative pulse width to cycle 85 TENMA Cursor Measurement Press CURSOR to display the measurement cursor and cursor menu then adjust the cursor position by turning the MULTIPURPOSE control knob As shown in the figure below CURSOR in the control zone is the function key for cursor measurement You can move the cursor to carry out measurement in the CURSOR mode There are two modes to choose from voltage and time When measuring voltage select voltage for type and adjust the positions of the two cursors with the MULTIPURPOSE control knob to measure V Likewise by selecting time you can measure T The CURSOR menu has two other modes independent and tracking In the independent mode you can adjust the positions of the two cursors independently In the tracking mode you press the MULTIPURPOSE control knob to move two cursors simultaneously 86 Tenma DSO Four channe
52. he vertical deflection factor reading correct There arefour values 1X 10X 100X and 1000X Invert On Waveform is inverted Off Normal waveform display Tenma DSO Four channel User Manual 1 Setting up channel coupling Take an example of applying a signal to CH1 The signal being tested is a sine signal that contains DC Press F1 to select AC then press F2 to select AC 1MQ It is now set up as AC coupling DC quantities of the signal being tested will be intercepted The waveform display is as follows TRIG ED F 1 007 VOR AC coupling AE Setup FULL i Coarse 1x i OFF H 200 5 0000ps WCH 000mY k Figure 2 1 DC quantities of the signal are intercepted TENMA Press F1 twice to select DC 1MQ Both DC and AC quantities of the testing signal being inputted to CH1 can pass through The waveform display is as follows TRIG ED lessee DC coupling DCI hie 3 setup FULL Coarse E 5 Off M Us 0 000 pas CHI O 00m i Figure 2 2 Both DC and AC quantities of the signal are displayed 31 TENMA Press F1 then F3 to select ground It is now set up as ground The waveform display is as follows TRIG ED F 1 00 GND setup FULL M 200 prs 0 000 us CHi O00mi Figure 2 3 Channelis setto ground mode Note In this mode although waveform is not displayed the signal remains connected to the channel circuit 32 Groun
53. igger CH1 amp CH2 CH1 and CH2 trigger their respective signals alternately CH1 amp CH3 CH1 and CH3 trigger their respective signals alternately CH1 amp CH4 CH1 and CH4 trigger their respective signals alternately CH2 amp CH3 CH2 and CH3 trigger their respective signals alternately CH2 amp CH4 CH2 and CH4 trigger their respective signals alternately CH3 amp CH4 CH3 and CH4 trigger their respective signals alternately TENMA Tenma DSO Four channel User Manual Table 2 11 Pulse width Trigger Function Menu Setup Explanatory Note Thesystem automatically acquires waveform data when thereis no trigger signal The scan baseline is shown on the display When the trigger signal is generated it automatically turns to trigger scan Thesystem stops acquiring data when there is no trigger signal When the trigger signal is generated trigger scan occurs One trigger will occur when there is an input trigger signal Then trigger will stop Pulse setup See Table 2 12 Set the pulse width Table 2 12 Pulse e O pe Erpinen 0o00 o Explanatory Note 1 11 1 11 11 111 Type I E Posti Ene the positive pulse width as the trigger signal se Set the negative pulse width as the trigger signal When Trigger occurs when pulse width of the input signalis smaller than the setting value Trigger occurs when pulse width of the input signalislarger than the setting value T
54. igger Trigger is setto occur when the signal is at the rising or falling edge You can use the trigger 52 Tenma DSO Four channel User Manual LEVEL knob to change the trigger point s vertical position on the trigger edge i e the intersection point of the trigger level line and the signal edge on the screen Pulse width trigger When the pulse width of the trigger signal reaches a preset trigger condition trigger occurs Video trigger Carry out field or line trigger to standard video signals Slope trigger or falling rate Trigger condition is the signal rising Below are notes for various trigger menus Edge Trigger For edge trigger menu setups please see Table 2 10 Tenma DSO Four channel User Manual Table 2 10 Edge trigger Source Coupling TENMA Explanatory Note CH1 CH2 CH3 CH4 Set CH1 CH2 CH3 or CH4 as the signal source trigger signal EXT EXT 5 LINE CH1 amp CH2 CH1 amp CH3 CH1 amp CH4 CH2 amp CH3 CH2 amp CH4 CH3 amp CH4 DC AC L F Reject H F Reject Setto external trigger or divide the external trigger source by 5 Setto AC power trigger CH1 and CH2 trigger their respective signals alternately CH1 and CH3 trigger their respective signals alternately CH1 and CH4 trigger their respective signals alternately CH2 and CH3 trigger their respective signals alternately CH2 and CH4 trigger their respective signals alternately CH3 and CH4 trigger their respective s
55. ightness Back TENMA Explanatory Note Run auto system calibration Display information like oscilloscope model version and serial number Clear all saved reference waveforms and setups Enter date and time setup See Table 2 29 Restore factory setup See Appendix D Set the auto function See Table 2 30 Return to the Utility menu Select your desired languages with the MULTIPURPOSE control knob and then press the MULTIPURPOSE control Knob to confirm Classical Traditional Modern Set the waiting time for automatic menu shutoff 5s 10s 20s and manual Manual means automatic shutoff is disabled Press MENU ON OFF to turn it on or off Adjustthe brightness of the display grid with the MULTIPURPOSE control knob Return tothe Utility menu pe UU zee See Table 2 28 Set waveform recording operation Next 2 2 Go to the next page TENMA Tenma DSO Four channel User Manual Table 2 27 Utility menu 2 Setup Explanatory Note ON OFF Displayed at the top right corner of the screen when turned on See note Interface oet GPIB and LAN for communication Applicable for optional accessory UT MO6G pe e CZ EE p Pre 2 2 NENNEN Return to the previous page Go to the next page Note The Cymometer counts the frequency of trigger events of the trigger channel It works on edge or pulse trigger but not alternate trigger The Cymometer is also disabled for video trigger 78 Tenma DSO Four channel User Manual
56. ignals alternately Allow AC and DC quantities of the inputsignalto pass Intercept DC quantities of the input signal Reject low frequency quantities below 80kHz of the signal Reject high frequency quantities above 80kHz of the signal Thesystem automatically acquires waveform data when thereis no trigger signal The scan baseline is shown on the display When the trigger signal is generated it automatically turns to trigger scan Thesystem stops acquiring data when there is no trigger signal When the trigger signal is generated trigger scan occurs One trigger will occur whenthere is an inputtrigger signal Then trigger will stop Continued table 53 TENMA Tenma DSO Four channel User Manual Table 2 10 Edge trigger Connected to the table Setup Explanatory Note Slope Rise oet to trigger at the signal s rising edge Fall oet to trigger at the signal s falling edge Rise Fall Setto trigger at the signal s rising and falling edges Pulse Trigger Pulse trigger means determining the triggering time based on the pulse width You can acquire abnormal pulse by setting the pulse width condition Table 2 11 Pulse width Trigger Function Menu Setup Explanatory Note ADIQIGUITD M MNMENNNNMNNNMNMENMNMEENEEEENMENMWNMNNMNNMNMNMNMNMNMNNNNMNMNMNN CH1 CH2 CH3 CH4 Set CH1 CH2 CH3 or CH4 as the signal source trigger signal EXT EXT 5 Setto external trigger or divide the external trigger source by 5 LINE oetto AC power tr
57. ion 1 5 quantization words AC voltage 40Hz 400Hz On Off test DC current external current voltage converter module Range 400mV AV 40V 400V Precision 1 2 5 quantization words Range 4000 4kO 400kO 4MO 40MO 9 Precision 1 5 5 quantization words 70 00 Forward voltage drop 0 5V 0 8V Range 4mA 40mA 400mA Precision 1 5 quantization words Range 4A Precision 1 5 5 quantization words Display Display type Display resolution display Display Colour 145mm diagonal line 5 7 LCD panel 320 horizontal x RGB x 240 vertical pixels color Backlight Intensity 300 nit Display Languages Simplified Chinese Traditional Chinese English 125 TENMA Probe Compensator Output Output Voltage Typical About 3V into peak to peak gt 1MQ Frequency Typical Tenma DSO Four channel User Manual Interface Functions Standard setup 1 x USB device 1 x USB host Multimeter interface Optional GPIB and LAN Power Source Source Voltage 100 240VAC 45 440Hz CAT II Power Consumption 50VA 60VA F1 6AL250V Located on the power board inside the unit Please note The product come with the power source 220V for UK Europe or 110V for USA Temperature 35 C 40 C x 60 RH niitude 126 Tenma DSO Four channel User Manual Mechanical Specifications Width 336mm Height 117mm Po Bept 174mm Weight net Without packaging
58. ional Check Carry out a quick functional check in the following steps to make sure your oscilloscope is operating normally Tenma DSO Four channel User Manual 1 Power on the unit Power on the unit AC power supply voltage range is 100V to 240V frequency 45Hz 440Hz After connecting to power start the self calibration process on the optimal oscilloscope signal path at greatest measurement accuracy Press the UTILITY button and F1 twice then press the MULTIPURPOSE control knob to perform the function Press UTILITY and F1 then press F5 to go to the next page There press F1 then the MULTIPURPOSE control knob To recall default setup see Figure 1 5 At the end of the above process press CH 1 to enter the CH1 menu TENMA Power switch Figure 1 5 AN Warning To avoid danger ensure the digital storageoscilloscope is safely grounded 19 TENMA 2 Accessing signals Connect the probe of the digital storage osciloscope to the CH1 input terminal and set the attenuation switch of the probe to 10X Figure 1 7 Tenma DSO Four channel User Manual Your Tenma DSO Four channel digital storage oscilloscope has four input channels and an external trigger input channel as shown in Figure 1 6 Please access signals in the following steps EXT external trigger channel Figure 1 6 Four channel input and external Figure 1 7 Setting the attenuation switch of trigger channel the oscillo
59. it to the multimeter port ofthe oscilloscope then connect the test lead 2 Press the DMM key and F1 to open the multimeter function table Press F2 then F5 to select measurement parameter DC current Press F5 then F4 to set current range to 4A 3 Connectthe test lead to the circuit being tested 4 f the current being tested is relatively small follow step 2 to select an appropriate current range and use a suitable current voltage converter module Adjust the current range of the current voltage converter module so it is consistent with that of the oscilloscope Next follow step 3 to measure TENMA Yin shift Vertical Current DC44 M 100s 0000s CHI DO nDO 0mVv Vertical Current DC400mA W 1 04 O 000 us CHI lt n n 0mv Figure 3 15 Selecting a suitable range for measurement 107 TENMA Chapter 4 System Prompts and Trouble shooting Definitions of System Prompts Adjustment at Ultimate Limit This informs you that the multifunction control knob has reached its adjustment limit in the current status No further adjust is possible When the vertical gratitude factor switch time base switch horizontal shift vertical shift and trigger level adjustment have reached their ultimate limits this prompt will appear USB Device Installed After a USB device is plugged into the oscilloscope this prompt appears when the connection is valid USB Device Unplugged unplugge
60. ktothe reference waveform storage menu If there is a USB drive it will be exported to the USB otherwise the prompt I O operation failed will appear 2 Select setup to enter the save setting menu oee Table 2 22 Table 2 22 Save setup menu Function Menu Setup Explanatory Note Save the current front panel setup status Save 1 10 To save on the internal memory of the oscilloscope select asave position with the MULTIPURPOSE control Knob and press the MULTIPURPOSE control knob to confirm 73 TENMA Table 2 22 Save setup menu FunctionMenu Setup Explanatory Note a Tenma DSO Four channel User Manual Recall 10 internal save positions and select one of them with the MULTIPURPOSE control knob Press the MULTIPURPOSE control knob to confirm See Table 2 23 Enter the USB menu See Table 2 23 Enter the USB menu Table 2 23 USB menu Function Menu Setup Explanatory Note n a mener de Enter the document name to be imported from the USB device with the MULTIPURPOSE control knob and F1 key For specific steps see note 2 P46 After confirming go back to the save setup menu If there is a USB drive it will be exported tothe USB otherwise the prompt I O failure will appear when exporting a waveform After confirming go back to the save setup menu If the document exists on the USB it will be imported otherwise the prompt I O operationfailed will appear when importing a waveform
61. l STORAGE Setting up the help system UTILITY Automatic measurement IMEASURE Cursor measurement CURSOR Auto setup run stop key AUTO RUN STOP Multimeter DMM Multipurpose control knob MULTIPURPOSE Itis recommended that you read this chapter carefully to understand the various measurement functions and system operation steps of your Tenma DSO four channel digital storage oscilloscope 29 FENMA Setting the Vertical System CH1 CH2 CH3 CH4 and setups Each channel has its own vertical menu You should set up each item for each channel individually Press the CH1 CH2 CH3 or CH4 function button and the system will display the operation menu for CH1 CH2 CH3 or CH4 For explanatory notes please see Table 2 1 below Tenma DSO Four channel User Manual Table 2 1 Explanatory notes for channel menu Function Menu Setup Explanatory Note Coupling DC 1MO Pass AC and DC quantities of input signal Intercept DC quantities of AC 1MO the input signal GND Display reference ground level without disconnecting the input signal BW m Full Full band width mu Ie Limit bandwidth to 20M Hz to reduce noise display VOLTS DIV Coarse Coarse tune in steps of 1 2 5 to set up the vertical eratitudefactor of Fine the vertical system Fine tune means further tuning within the coarse tune setup range to raise the vertical resolution Select either one value based on the probe attenuation factorto keep t
62. l User Manual MULTIPURPOSE Vern crose ACQUIRE STORAGE maro DIBPLAY Figure 2 27 Function key for the sampling system cursor CRON Bu AUTO Notes 1 3 In the independent or tracking mode select one of the cursors with the MULTIPURPOSE control knob The selected cursor is a solid line Adjust its position with the MULTIPURPOSE control knob There are two percentage options The current status is 100 The value between the two cursors is set to 100 i e one cursor is 0 and the other is 100 When 100 is set to 6 DIV the 3DIV area on the screen is 100 When the cursor function is enabled measurement value is automatically displayed in the top left corner Q is the selected cursor value TENMA Tenma DSO Four channel User Manual Table 2 34 Timecursor measurement menu Function Menu Setup Explanatory Note Measure time with the cursor Independent Move any one of the two cursors Tracking Move two cursors simultaneously without changing AT Second Select time as the measurement parameter Hertz Select frequency as the measurement parameter Percent Select percent as the measurement parameter Degree Select degree as the measurement parameter Table 2 35 Voltage cursor measurement menu Function Menu Setup Explanatory Note Amplitude Measure voltage with the cursor Independent Move any one of the two cursors Tracking Move two cursors simultaneously without changing AV H Units Base S
63. llow access to all basic functions for easy operation The scaling and position buttons for all channels are optimally arranged for intuitive operation As design is based on the familiar practices of traditional instruments users can use the new units without spending considerable time in learning and familiarizing with operation For faster adjustment to ease testing there is an AUTO key to instantly display the appropriate waveform and range position The performance features listed below will explain why theTenma DSO Four channel can fully satisfy your testing and measurement requirements Q 2GS s real time sampling rate and 50GS s equivalent sampling rate Dual time base function unrivaled waveform detail observation and analysis capabilities Tenma DSO Four channel User Manual 24k storage depth 60M equivalent storage depth 1024k recording length Unique envelop sampling feature with direct visual display of carrier wave details after amplitude modulation Scroll display in scan mode for continuous monitoring of signal variations Unique XY mode that displays the waveform and Lissajous figure concurrently USB drive system software upgrade Supports plug and play USB storage device Communication with computer through the USB device Storage of waveforms setups and bit maps waveforms and setups reproduction Built in FFT Multiple waveform mathematics functions including add subtract multiply and divide Te
64. me Made Independent Y Units Hertz Figure 3 6 Usingthe cursors to test signal frequency Note When using the cursor to measure voltage follow step 2 only and set the cursor type to voltage TENMA Il Measuring the negative duty ratio of a pulse signal 1 Press CURSOR to display the cursor measurement menu 2 Press F1 to activate the cursor measurement function 3 Press F1 again to set cursor type to time 4 Press F3 to set the vertical cursor unit to ratio 5 Turn the MULTIPURPOSE control knob to set cursor 1 at the first rising edge peak of the pulse 6 Press the MULTIPURPOSE control knob to select cursor 2 then turn the MULTIPURPOSE control knob again to set cursor 2 at the second rising edge peak of the pulse 7 Press F4 Current position is 100 Set the current value between cursor 1 and cursor 2 to 10095 99 TENMA 8 Use the MULTIPURPOSE control knob to set cursor 1 at the first falling edge of the pulse This Avalue is the negative duty ratio oee the figure below aM CURSOR Type Time a inc Independent Y Units Percent Current Position 100 m Diw Position 100 h Oops O 000j 5 CHi 15200mY Figure 3 7 Using the cursors to test pulse negative duty ratio 100 Tenma DSO Four channel User Manual Il Measuring the phase difference between two signals Measure the phase difference that occurs when a sine signal passes through t
65. me DC gain accuracy When vertical sensitivity is 2mV div 4 sampling or average acquisition mode When vertical sensitivity is 5mV div 5V div 3 sampling or average acquisition mode DC measurement accuracy When vertical position is zero and N 716 average acquisition mode 5 x reading 0 1 div 1mV and 2mV div is selected 3 x reading 0 1 div 1mV and 5mV div 5V div is selected When vertical position is not zero and N gt 16 3 x reading vertical shift reading 1 x vertical shift reading 0 2div Set from 5mV div to 200mV div plus 2mV Setup value 200mV div to 5V div plus 50mV Voltage difference AV Under identical setup and environmental conditions the voltage difference measurement accuracy AV between two points of the waveform after the average of gt 16 waveforms average acquisition mode acquired waveforms is taken 3 x reading 0 05div Tenma DSO Four channel User Manual Vertical 121 TENMA Trigger Trigger sensitivity Internaltrigger 1 div external trigger 100mV Trigger level range t 8 div from the centre of the screen 800mV EXT 5 on signals of 220ns rise or fall time of the screen Pretrigger capability Normal mode scanning mode pretrigger delayed trigger Pretrigger depth is adjustable Holdoff range 96 0000ns 1 5s Set level to 50 Typical Input signal frequency gt 50Hz Edge Trigger Edge type Rise Fall Rise amp Fall Pulse Trigger Trigger mode Smaller
66. n measuring large current with the module to ensure precision carry out power on measurement every 15 minutes Do not power on for more than 15 seconds each time Help System The oscilloscope has a Help system with topics that cover all the features of the oscilloscope The oscilloscope displays information about the last menu displayed on the screen when you push the HELP Information about specific menus and controls such asthe Vertical Position Control Note Push HELP button to display or exit help information TENMA Table 2 37 DMM Menu Function Menu Setup ON OFF Mode Voltage Resistance ON OFF Diode DC current Tenma DSO Four channel User Manual Explanatory Note DMM functions on off Activate the voltage measurement function Maximum measurement value for DC voltage is 400V Maximum measurement value for AC voltage is 400V Activate the resistance measurement function Maximum measurement value for resistance is 40MQ Activate the on off measurement function When on off measuring is lower than 70 the beeper will sound Activate the diode measurement function Connect the positive pole to the red testlead and the negative pole to the black test lead Current range 4mA 40mA 400mA 4A Win shift Setthe horizontal shift or vertical shift of the window with the MULTIPURPOSE control knob 91 TENMA Chapter 3 Practical Example Illustrations Illustration 1 Measuring simple signals
67. nal purchaser acquired the product from TENMA or an authorized dealer The probe other accessories and fuses are not covered by warranty If any genuine defect is found during the valid warranty period TENMA has the option to repair the defective product without any charge for parts or labor or replace it with another product at the discretion of TENMA TENMA may use parts modules and replacement products that are brand new or repaired to a good as new standard All old parts modules and products that are removed during replacement become properties of TENMA In this User Manual customer means an individual or entity vested with the rights hereunder To enjoy the warranty service the customer must report any defect to TENMA during the valid warranty period and make appropriate arrangement to allow servicing The Tenma DSO Four channel User Manual customer should pack the defective product in a container and deliver it to a maintenance centre specified by TENMA The customer should also prepay all freight cost and provide a copy of the original sales receipt issued to the original purchaser If the product is to be delivered to an address within the country where the maintenance centre operates TENMA shall pay the cost of returning the product to the destination all freight custom duty tax and other costs will be paid by the customer This warranty does not apply to any defect malfunction or damage caused by accident norm
68. ng the cursors to testthe phase difference between two signals 101 TENMA Illustration 6 Using the X Y function To check the phase difference between two channels Example To measure the phase variation when a signal passes through the circuit connect your oscilloscope to the circuit and monitor the input and output signals To check the circuit s input and output in the X Y coordinate mode follow the steps below 1 102 Set the attenuation factor of the probe to 10X Set the switch of the probe to 10X Connect the CH1 probe to the input terminal of the network Connect the CH2 probe to the output terminal of the network If the channel is not displayed press the CH1 and CH2 menu button to enable the two channels Press AUTO Adjust the vertical SCALE knob to make the displayed amplitude of the two channels to about equal Press the DISPLAY menu key to recall the Tenma DSO Four channel User Manual display menu 7 Press F1 to select X Y The oscilloscope will display the circuit s input and output characteristics in a Lissa jous figure 8 Adjust the vertical scale and vertical position knob to achieve the best result of waveform 9 Using the elliptic oscilloscope display graph to observe measure and calculate the phase difference see the figure below Signal mustbe horizontally central Figure 3 9 Tenma DSO Four channel User Manual If sinO A ore 10 9 O is the an
69. nma DSO Four channel User Manual Edge video pulse slope and alternate trigger functions Automatic measurement of 24 waveform parameters parameters testing and customization Multiple AUTO setups for extra flexibility Visual system help messages Tenma DSO Four channel accessories 4 x 1 2m 1 1 10 1 probe For details refer to the probe instructions These accessories conform with EN61010 031 2008 standards Power line conforming to international standards applicable in the country of use User Manual USB connecting cable UT D06 Tenma DSO four channel oscilloscope communication control software USB device TENMA 2x multimeter test lead 2x current to voltage converter module UT M03 UT M04 TENMA Item Safety Instructions Preface Chapter 1 Chapter 2 Table of Contents User Guide 13 General Inspection 18 Functional Check 18 Probe Compensation 22 Automatic Setup for Waveform Display 23 Getting to Know the Vertical System 23 Getting to Know the Horizontal System 25 Get
70. normal rate Waveform onthe screen is maintained for 1 second and then refreshed Waveform onthe screen is maintained for 2 seconds and then refreshed Waveform onthe screen is maintained for 5 seconds and then refreshed Waveform onthe screen remains on display New data will be added continuously until this function is disabled In Fast ACQ mode intensity of the waveform can be adjusted with the MULTIPURPOSE control knob 69 TENMA X Y Mode This mode offers two separate displays The first group is CH1 and CH2 i e CH1 signal input on the horizontal axis X axis and CH2 signal input on the vertical axis Y axis The other group is CH3 and CH4 i e CH3 signal input on the horizontal axis X axis and CH4 signal input on the vertical axis Y axis as shown in Figure 2 23 TRIG ED F 1D DISPLAY H 200 05 0 00s CHS 3 Figure 2 23 Waveform display in X Y 70 Tenma DSO Four channel User Manual Caution In the normal X Y mode you can move XY figures horizontally with the CH1 or CH3 POSITION knob and move XY figures vertically with the CH2 or CH4 POSITION knob Adjust the dimension and shape of XY figures with VOLTS DIV of the four channels and turn the SEC DIV knob to improve the display quality of the lissajous figure Thanks to the unique X Y display feature your osciloscope can display channel waveform and lissajous figure concurrently The Tenma DSO Four channel also offers the following functio
71. ns E Automatic measurement mode B Cursor measurement mode B Reference or math waveform The following functions are disabled under X Y mode B Dual time base B Horizontal POSITION knob Tenma DSO Four channel User Manual Key points Display Type Vector display fills the space between adjacent sampling points in display The dot mode displays only the sampling points Refresh Rate Refresh rate is the number of times the digital storage oscilloscope refreshes the waveform display per second The refreshing speed affects the capability to observe signal movements speedily TENMA Storage and Recall As shown below the STORAGE button in the control zone is the function key forthe storage system MULTIPURPOSE LE E TLIRE ACQUIRE STORAGE Gi SLAY ur a Figure 2 24 Function key for the sampling system storage ctose DMM ALS Press the STORAGE button to display the storage setup menu You can use this menu to save waveforms or setup status of the oscilloscope in the internal memory or the USB device and recall any stored waveform through RefA or RefB or press STORAGE to recall the setup status When the USB device is inserted you can store the oscilloscope s waveform display in bitmap format on the USB device 11 TENMA Instructions Press STORAGE to go to the type menu There are three types to choose from Setting Wave Bitmap 1 Select Wave to go to the wavef
72. o power interruption power off the oscilloscope and repeat all the USB update steps Figure 5 6 No valid update document 113 TENMA 2 Theusercancels the update process When the oscilloscope is restarted with the USB device plugged in you can cancel upgrade by pressing F1 To cancel upgrade and operate your oscilloscope normally follow the on screen instructions Remove the USB device and reboot Program Update System MLA A SL Figure 5 7 Cancel update 1 114 Tenma DSO Four channel User Manual During the update process you can cancel update by pressing F1 To cancel upgrade and operate your oscilloscope normally follow the on screen instructions Remove the USB device and reboot Program Update System mL Figure 5 8 Cancel update 2 TENMA 3 You can still cancel update when the 3 TheUSBdeviceis removed before update begins Tenma DSO Four channel User Manual oscilloscope is ready for the process Simply If the USB device is removed when the update press F1 to return to normal operation Please document is being read before commencement of follow the on screen instructions Remove the update the following prompt will appear USB device USB device and reboot has been removed Please reboot To resume normal operation power on the oscilloscope with the USB device unplugged Program Update System JUUUUUUT Propram Update System gt IU DT En E t
73. ordance with IEC61010 1 safety standards It fully meets CAT II 600V insulation and overvoltage requirements and Grade II anti pollution safety standards To prevent personal injuries and damage of this unit or any other devices connected to it please take note of the following safety precautions To avoid potential hazards use this unit strictly asinstructed by this User Manual Maintenance should only be carried outby atrained professional To avoid fire and personal injury Useacorrect power cable Use onlythe specified power cable which is authorized in the country of use TENMA Remove the plug correctly Do not remove the probe or testing cable when they are connected to power Ensure good grounding This unitis grounded by the ground wire of the power cable To avoid electric shock the grounding conductor must touch the ground Before connecting the input or output terminal ensure the unitis properly grounded Connect the probe of the digital storage oscilloscope The probe ground cable is the same as ground potential Do not connect the ground cable to non ground voltage or high voltage Check the rated values of all terminals To prevent fire and excessive current shock please check all rated values and label data Read the manual carefully and check the rated values before connecting the unit Do not operate the unit with the chassis cover open Do not operate this unit when the outer cover or front panel is
74. orizontal POSITION knob you can move the trigger point horizontally Holdoff means the interval time before another trigger to be accepted Turn the MULTIPURPOSE control knob to set the holdoff time By adjusting holdoff time you can observe complex or complicated signals Tenma DSO Four channel User Manual Getting to Know the Trigger System As shown in Figure 1 13 there are one knob and one button in the trigger menu control zone The following steps will get you familiar with trigger setup TRIGGER _ Type Edge TRIGGER MENU SOW Coupling Figure 1 13 Trigger menu on the front panel Figure 1 14 Trigger Menu TENMA Trigger LEVEL knob When operating edge pulse width and slew rate triggers set the amplitude to be crossed by the waveform upon signal occurrence by turning the trigger LEVEL knob To quickly set the trigger level as the vertical centre point of the trigger signal press the trigger LEVEL knob MENU To display trigger menu contents 1 Use the trigger LEVEL knob to change the trigger level You will see a trigger sign on the screen that indicates the trigger level The sign will move up and down with the knob While you move the trigger level you will find the trigger level value on the screen changing accordingly 2 Openthe trigger MENU key see the figure 1 14 to change trigger setup Press F1 twice and select EDGE for TYPE 2 TENMA 28 Press F2 and
75. orm storage menu shown below see Table 2 20 A stored reference waveform can be recalled with the REF menu reference waveform P 32 For specific steps see the REF instructions Table 2 20 Storage Menu Type Source CH1 CH2 CH3 CH4 Tenma DSO Four channel User Manual Note About Internal and CSV formats When exporting a reference waveform to the USB device you can select internal or CSV Internal waveforms can only be imported to the oscilloscope in REF mode and cannot be displayed on any other interface CSV waveforms can be opened in EXCEL on a PC It is a group of voltage and time correlation 2D data Function Menu Setup Explanatory Note Type Wave Selecta signal source waveform displayed onthe screen Select waveform from CH1 Select waveform from CH2 Select waveform from CH3 Select waveform from CH4 Save 1 10 To save the reference waveform on the internal memory of the oscilloscope turnthe MULTIPURPOSE control knob to select the storage position and press the MULTIPURPOSE control knob to confirm See Table 2 21 Go to the USB menu 7 2 TENMA Tenma DSO Four channel User Manual aaa eae 2 21 USB menu Explanatory Note Function Menu Setthe document name to be imported from the USB device with the MULTIPURPOSE control knob and F1 key For specific steps see note 2 P34 CY esee nate M CSV Internal See note x confirming go bac
76. ormat YT Horizontal position Automatically adjusted SEC DIV Adjust according to signal frequency Trigger coupling Holdoff Mimumvaue Trigger level set at 50 DC Minimum value Trigger mode Trigger source Trigger slope Trigger type BW Limit VOLT DIV Adjust according to amplitude of the signal 89 TENMA Menu Display ON OFF To display or hide the current menu With the menu ON OFF key you can display or hide the menu currently on screen but help messages are not displayed Multimeter Measurement Operation instructions Open the multimeter function menu by pressing the DMM Digital Multimeter button Notes If it is necessary to test electric current follow these steps Insert the current voltage converter module that comes with the oscilloscope into the digital multimeter port and move the switch of the current voltage converter so that it is consistent with the selected DMM current Proceed with testing Cautions 1 Please select a suitable current voltage converter module that fits the measurement range and 90 Tenma DSO Four channel User Manual select an appropriate range If you are not certain about the current being tested make an estimation use the which has the largest range then select a suitable module range to suit the data 2 The current voltage converter module of the multimeter cannot be used to measure AC current 3 Whe
77. ou can use an external clock or the signal from a circuit to be tested as the trigger source The EXT trigger source uses the EXT TRIG input terminal to access external trigger signals EXT setup is enabled when signal trigger level range is 0 8V to 0 8V To allow input of larger signal through external trigger the trigger signal is divided by 5 in the EXT 5 mode so that the trigger level range is extended to 4V to 4V 2 Tenma DSO Four channel User Manual LINE means the AC power source This trigger mode is suitable for observing signals related to the AC power e g the correlation between lighting equipment and power source equipment to achieve stable synchronization Trigger mode Determine the action of your oscilloscope at trigger This oscilloscope offers three trigger modes for selection auto normal and single Auto Trigger The system will acquire and display waveform data automatically when there is no trigger signal input When the trigger signal is generated it automatically turns to trigger scan for signal synchronization Note Time base of the scan range can be set to 50ms div or slower to generate a roll waveform Normal Trigger n this mode your oscilloscope samples waveforms only when triggering conditions are met The system stops acquiring data and waits when there is no trigger TENMA signal When the trigger signal is generated trigger scan occurs Single Trigger In this mo
78. p Explanatory Note Main Switching between main time base and dual time base Dual For dual time base mode instructions see Figure 2 15 M1 Base CH1 CH2 Switch to the waveform displayed on a different channel Only CH3 CH4 one channel can be displayed in the dual time base mode X Adjust M1 When M1 is the main time base use the horizontal POSITION and SEC DIV knobs to adjust into main time base parameters M2 When M2 is the main time base use the horizontal POSITION and SEC DIV knobs to adjust into main time base parameters M2 Shift Coarse Set delayed time base M2 to move horizontally in escalating scale Fine Set delayed time base M2 to move horizontally in de escalating scale BACK Return to the horizontal menu 51 TENMA Setting the Trigger System Triggering decides when the oscilloscope collects data and display waveforms Once the trigger is correctly set up it can transform unstable displays into meaningful waveforms When beginning to acquire data the digital storage oscilloscope first collects sufficient data required for drawing a waveform on the left side of the trigger point When trigger is detected it continuously acquires sufficient data to draw a waveform on the right side of the trigger point The trigger control zone on the operation panel of your oscilloscope comprises a trigger LEVEL knob and a trigger MENU button Trigger Control Trigger modes Edge Pulse Video and Slope rate Edge tr
79. quals to the set slew rate Slewrate Settheslewrate value with the MULTIPURPOSE control knob Threshold Low Change the low level value with the MULTIPURPOSE control knob Tenma DSO Four channel User Manual High Change the high level value with the MULTIPURPOSE control knob High amp Low Change the high and low level value with the MULTIPURPOSE control knob Back JReturntothe slewrate trigger menu Alternate Trigger When alternate trigger is selected the trigger signal will be present in two vertical channels This triggering mode is suitable for observing two signals of unrelated signal frequencies Alternate trigger can also be used to compare pulse widths 60 TENMA Adjusting the Holdoff Time TEL Teze now Window You can adjust the holdoff time to observe main complicated waveforms e g pulse string series Holdoff time means the waiting time for the trigger circuit to be ready for use again when the oscilloscope is restarted During this time the oscilloscope will not trigger until the holdoff is complete For example if you wish to trigger one group of pulse series at the first pulse set the holdoff time to the pulse string width as shown in Figure 2 18 Figure 2 18 Use the holdoff function to synchronize complicated signals Tenma DSO Four channel User Manual WoW Oops O 000 j CHI _f 1 844 Table 2 17 Trigger holdoff menu Setup Explanatory Note Window Press F1 to
80. quency recognition rate is better than the rectangle window but amplitude recognition rate is poorer Frequency recognition rate is marginally better than Hanning window The best amplitude recognition rate and the poorest frequency recognition rate Definition FFT recognition rate means the quotient of the sampling and math points When fixed the sampling rate should be as low as possible relative to the FFT recognition rate Nyquist frequency To rebuild the original waveform with a maximum frequency of f This is known as frequency and 2f is the Nyquist sampling rate TENMA Most Suitable Measurement Item Temporary or fast pulse Signal level is generally the same before and after Equal sine wave of very similar frequency There is broad band random noise with slow moving wave spectrum Sine cyclical and narrow band random noise Temporary or fast pulse Signal level varies greatly before and after Mainly for single frequency signals to search for higher order harmonic wave math point value is at least 2f sampling rate should be used for waveform Nyquist stability criterion where f is the Nyquist 41 TENMA Digital Filtering Function TRIG ED F 1 001 __ FILTER NN Wpper Limit Setting the maximum Y Offset frequ en Cy it Y Lewel Pred 2 W 1 00s 0000s WCH 2 00my Figure 2 12 Digital filtering 42 Tenma DSO Four channel User Manual Table 2 5a Explanatory notes for the
81. r further instructions This indicates that the software version you have saved on to the USB device is lower than the existing one on the oscilloscope You should acquire the correct version either online or through our after sales service department To see version information press UTILITY SYSTEM CONFIGURATION SYSTEM INFORMATION Please download the suitable update document Program Update System s SUNN Figure 5 13 Low software version T TENMA Software documentincompatible with product model If the USB update document is incompatible with the oscilloscope model update will fail You will be prompted that Software and product model incompatible Please read the user manual for further instructions You should download an update document which corresponds with your oscilloscope model e g Tenma DSO then repeat the USB update steps Propram Update System ANNAU Figure 5 14 Incompatible software document and product model 117 TENMA Chapter6 Appendixes Appendix A Technical Indicators Unless otherwise specified all technical specifications apply to probes with attenuation setting of 10X and the Tenma DSO Four channel Digital Oscilloscope To verify that your oscilloscope meets specifications it must first meet the following conditions B Ihe oscilloscope must have been operating continuously for thirty minutes at the specified operating temperature B Ifthe operating temp
82. r status display 41 P E TM i oa rigger frequency counter A n E hi C2 The menu varies with individual function keys Channel vertical reference Waveform display window Channel vertical attenuation range hi SON T O 000 jis CH ree Displaying main time base setup Trigger level Figure 1 4 Schematic diagram of the display interface 17 TENMA General Inspection We suggest checking your new Tenma DSO Four channel oscilloscope in the following steps 1 Check the unit for possible shipping damages If the package carton or foam plastic protective lining is seriously damaged please arrange for exchange immediately 2 Check the accessories A checklist of accessories that come with your Four channel oscilloscope is provided in the section Accessories for Tenma DSO Four channel Digital Storage Oscilloscop of this user manual Please check any missing items against this list If any item is missing or damaged please contact your TENMA dealer or our local office 3 Thorough inspection of the entire unit If the exterior of the unit is damaged or it is not operating normally or it fails to pass the performance 18 Tenma DSO Four channel User Manual test please contact your TENMA dealer or our local office In the event of any shipping damages please retain the packaging and notify our shipping department or your TENMA dealer We will be glad to arrange maintenance or repair Funct
83. rage Averages E Equivalent oft O 000p s CHI EM ennnnv Figure 2 21 Waveform when 32 time 66 Tenma DSO Four channel User Manual Notes Acquisition 1 Use Real time sampling signals Use Equivalent sampling frequency cyclical signals To avoid mixed envelop when observing a signal select Peak Detect To reduce random noise of the displayed signal select average sampling and increase the average number of times in multiples of 2 i e selecting from 2 to 256 to observe single to observe high Tenma DSO Four channel User Manual Definitions Real time sampling Acquiring the data required in one go Maximum sampling rate is 2GS s Equivalent sampling This is a repeated sampling mode that allows detailed observation of repeated cyclical signals In the equivalent sampling mode the horizontal pixel aspect ratio is 20ps higher than the real time mode i e 50GS s equivalent Normal mode Your oscilloscope acquires signal samples at equal time intervals to reconstruct waveform Peak detect mode In this acquisition mode the oscilloscope identifies the biggest and smallest values of the input signals at each sampling interval and use these values to display the waveform In effect the oscilloscope can acquire and display narrow pulse which would otherwise be omitted in the sampling mode Noise seems to be more significant in this mode TENMA Average mode The oscilloscope acquires
84. rigger occurs when pulse width of the input signal equals to the setting value 95 TENMA Table 2 12 Pulse width setup Tenma DSO Four channel User Manual Explanatory Note eed setting Set pulse width trigger to 20 0ns 10s with the MULTIPURPOSE control knob Back Return to the pulse width trigger menu Video Trigger By selecting video trigger you can carry out field or line trigger with NTSC or PAL standard video signals see Table 2 13 for the trigger menu Table 2 13 Video trigger nem HuEENE LL CH1 CH2 CH3 CH4 SC ONZ Ons CT SEO CH2 CH3 or CH4 as the signal source trigger signal EXT EXT 5 Setto external trigger or divide the external trigger source by 5 LINE Set to AC power trigger CH1 amp CH2 CH1 and CH2 trigger their respective signals alternately CH1 amp CH3 CH1 and CH3 trigger their respective signals alternately Pulse width CH1 amp CH4 CH1 and CH4 trigger their respective signals alternately CH2 amp CH3 CH2 and CH3 trigger their respective signals alternately CH2 amp CH4 CH2 and CH4 trigger their respective signals alternately CH3 amp CH4 CH3 and CH4 trigger their respective signals alternatel Video setup oee Table 2 14 Enter the video setup TENMA Tenma DSO Four channel User Manual Ee 2 14 Video se Setup Explanatory Note NTSC ouitable for NTSC video signals Odd Field Setthe video odd field to synchronized trigger Even Field oetthe video even
85. rizontal time base setup and check any changes in status information Turn the horizontal SEC DIV knob to change the SEC DIV time base range You will find that the time base range in the current status column has changed accordingly Range of horizontal scanning rate is 5ns div 50s div in steps of 1 2 5 Note Horizontal scanning time base range of th Tenma DSO Four channel varies from model to model 25 TENMA 26 Use the horizontal POSITION knob to adjust the horizontal position of the waveform window When the horizontal POSITION knob is turned you can see that the waveform moves horizontally with the knob Press MENU to activate the display window and dual time base menu In this menu press F1 to activate window expansion Then press F1 again to quit window expansion and return to the main display screen For dual time base setup press F3 You can also set the holdoff time with this menu by turning the MULTIPURPOSE control knob Tenma DSO Four channel User Manual Shortcut key for resetting the trigger point to horizontal zero When the trigger point has shifted significantly away from the horizontal centre point use the POSITION knob to quickly reset the trigger point to the horizontal centre point You can also use the horizontal POSITION knob for adjustments Definition Trigger point means the actual trigger point relative to the centre point of the storage device By turning the h
86. s restored The default status is as follows Bandwidth limit full bandwidth VOLTS DIV coarse tune Inversion Off set pa In the unlock mode default status is restored The default status is as follows pan L7 mode normal sampling equivalent sampling Off Locked Unlock In the unlock mode default status is restored The default status is as follows Type edge signal source adjusted see note trigger coupling DC slew rate type risinc Signal Locked Unlock Unlock Channelis open closed depending on the presence of input signal Locked Channel is maintained open or closed Back f Returntothe Utility menu Tenma DSO Four channel User Manual Unlock In Auto mode the setup will go back to default for auto setup Locked In Auto mode the current status is locked for auto setup Forunlock or locked status see the table below 2 30 Notes The adjustment basis for the trigger signal source in Auto mode 1 If there is input signal in only one channel that channel will be the trigger source 2 When more than one channels have input signal the system will search for trigger signal from CH1 The first channel where signal is detected will be the trigger source 3 If no signal is detected in any channel CH1 will be the trigger source TENMA Important Points Auto Calibration You can correct measurement errors caused by environmental changes with the auto calibration function
87. scope probe 20 Tenma DSO Four channel User Manual 2 You have to set the probe attenuation factor of the oscilloscope This factor changes the vertical range multiple to ensure the measurement result correctly reflects the amplitude of the signal being tested Set the attenuation factor of the probe as follows Press F4 then F2 to show 10X on the menu Probe ration Figure 1 8 Setting the deflection factor ofthe oscilloscope probe TENMA 3 Connect the probe tip and ground clamp to the connection terminal for the probe compensation signal Press AUTO and you will see a square wave in the display 1kHz approximately 3V peak to peak value in a few seconds as shown in Figure 1 9 TRIG ED h S00 HZ O 000 pas CHI 400 00mi Figure 1 9 Probe compensation signal 4 Press CH1 twice to close CH1 then press CH2 to activate CH2 and repeat steps 2 and 3 Use the same method for CH3 and CHA 21 TENMA Probe Compensation When connecting the probe to any input channel for the first time perform this adjustment to match the probe to the channel Skipping the compensation calibration step will result in measurement error or fault Please adjust probe compensation as follows 1 Set the probe attenuation factor to 10X Move the switch on the probe to 10X and connect the probe to CH1 When using a hook tip ensure it is well connected to the probe Connect the probe tip to the output terminal of t
88. the oscilloscope Remember to 128 Tenma DSO Four channel User Manual disconnect power Use a mild cleaner or water To avoid damaging the product or probe do not use abrasive chemical cleaner Warning To avoid short circuit or personal injury due to the presence of moisture please ensure the product is completely dry before reconnecting power for operation Tenma DSO Four channel User Manual Appendix D Factory Setups When you press UTILITY Factory Setup the selected option will be changed Please refer to the table below System Function Factory Setup 5VIDIV Vertical system POSITION Vertical centre point CH2 CH3 CH4 MATH REF Horizontal system Trigger system Other system TENMA Function Factory Setup Sampling mode Normal sampling Equivalent mode Measurement Display format VT Displytpe V TENMA Tenma DSO Four channel User Manual Copyright 2011 TenmaAll rights reserved Manufacturer Tenma 405 S Pioneer Blvd Springboro Ohio 45066 3001 Phone 1 888 655 5409 This user manual may be revised without prior notice 130
89. the reference waveform has been recalled or imported Tenma DSO Four channel User Manual Setting the Horizontal System Horizontal Control You can use the horizontal control knobs to change the horizontal gratitude time base and trigger the horizontal position of the memory triggering position Changing the horizontal gratitude will cause the waveform to increase or decrease in size relative to the screen centre When the horizontal position changes the position with respect to the waveform triggering point is also changed Horizontal position Adjust the horizontal positions of channel waveforms including math waveforms Resolution of this control button changes with the time base Horizontal scaling Adjust the main time base i e SEC DIV When time base extension is on you can use the horizontal scaling knob to change the delay scanning time base and change the window width Two horizontal control knobs Use the SEC DIV knob TENMA to change horizontal time base gratitude and the horizontal POSITION knob to change relative position if the triggering point on screen For instructions on how to display horizontal menu MENU see Table 2 8 9 use the the the Horizontal controls menu Horizontal menu display see the table below 47 TENMA Table 2 8 Explanatory notes for the horizontal menu Function Menu Setup Explanatory Note eee eee Tenma DSO Four channel User Manual
90. ting to Know the Trigger System 2f Instrument Setups 29 Setting the Vertical System 30 Setting the Horizontal System 47 Setting the Trigger System 52 Setting the Sampling System 54 Setting the Display System 68 Storage and Recall 11 Tenma DSO Four channel User Manual Tenma DSO Four channel User Manual Item Chapter 3 TENMA Utility Function Setup 76 Automatic Measurement 82 Cursor Measurement 86 Using the Run Stop 88 Auto SetuUp 89 Multimeter Measurement 90 Help System 90 Practical Example Illustrations
91. titude factor scanning time base and trigger mode Should you require to make more detailed check you can adjust manually after the auto setup process until you get the optimal waveform display TENMA Getting to Know the Vertical System As shown in the figure below there are a group of buttons and knobs in the vertical control zone The following exercise will guide you through vertical setup Figure 1 11 Vertical control zone on the front panel 23 TENMA The POSITION knob can move the waveform vertically Press this knob to quickly return to the centre point Press the CH1 CH2 CH3 CH4 REF and MATH keys for the vertical channel operation menu or to open or close the waveform display channel Use the VOLTS DIV CH1 CH2 CH3 CH4 key to set the vertical gratitude factor Displacement and vertical gratitude factor adjustments of REF MATH channels by MULTIPURPOSE control knob 1 Press the vertical POSITION knob to display the waveform signal in the centre of the window The vertical POSITION knob controls the vertical display position of the signal When you turn the vertical POSITION knob the reference sign indicating the channel GROUND level will move up and down with the waveform 24 Tenma DSO Four channel User Manual Measurement Tips If the channel coupling is DC you can measure the signal s DC component quickly by checking the distance between the waveform and signal

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