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2530B, 2532B Digital Storage Oscilloscope User Manual

1. Pulse Slope or Video 9 Set the trigger according to trigger edge 10 Press the Source option button to select CH2 11 Press the CH2 button and turn the Time div knob to optimize waveform display 12 Repeat steps 8 and 9 PERE 67 Coupling Use Coupling to make sure the signal passes through the trigger circuit It is useful for obtaining a steady waveform If you use trigger coupling you should press the TRIGGER button and then select Edge Pulse Video or Slope trigger Then select the coupling option in the Set Up menu Position The horizontal position control establishes the time between the trigger position and the screen center You can adjust the horizontal POSITION knob control to view waveform data before the trigger after the trigger or some of each When you change the horizontal position of a waveform you are changing the time between the trigger and the center of the display This appears to move the waveform to the right or left on the display Slope and Level The Slope and Level controls help to define the trigger The Slope option Edge trigger type only determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal The TRIGGER LEVEL knob controls where on the edge the trigger point occurs Rising edge Falling edge Figure 37 Rise and Fall Edge 68 Note Pre
2. On 34 Iwert On Input Filter Mest Page r e0a00K M SEB ps CHi 132i MM Pos FAR ps Sid Figure 20 Invert Waveform Screen 6 Using the Digital Filter Press CH1 Next Page page 1 2 Filter display the digital filter menu Select Filter Type then select Upper Limit or Lower Limit and turn the Universal knob to adjust them e Press CH1 Next Page page 1 2 Filter Off Turn off the Digital Filter function Type Lot Lo Limit M SHB ps CHi 71 321 M Pos HHHus 11 A7F 1515 42 Figure 21 Digital Filter Menu e Press CH1 Next Page pagel 2 Filter On Turn on the Digital Filter function 35 FILTER Filter Type Eyi pp_Limit HBKHz M SHE ps mAs M Pose Figure 22 Digital Filter Ad a l l justment Screen Using Vertical Position Knob and Volts div Knob e Vertical POSITION knob 1 Use the Vertical POSITION knobs to move the channel waveforms up or down on the screen This button s resolution varies based on the vertical scale 2 When you adjust the vertical position of channel waveforms the vertical position information will display on the bottom left of the screen For example Volts Pos 24 6mV 3 Press the vertical POSITION knob to set the vertical position to zero Volts div knob 1 Use the Volts div knobs to control how th
3. Type button or turn the Universal knob to select Time measurement parameter Display the corresponding icon and measurement value of your selected time measurement parameter Return to the first page of auto measurement menu Table 39 Auto Measurement Function 4 Delay Measurement Menu Setting Source Type CHX CHY Phase FRR FRF FFR FFF LRR LRF LFR 88 Select any two input signal source for Delay measurement Press the Type button or turn the Universal knob to select Delay measurement parameter Display the corresponding icon and measure value of your selected Delay measurement parameter Return to the first page of auto measurement menu Table 40 All Measurement Function Menu Setting Select input signal channel Voltage On Turn on the all measurement function to Off measure voltage parameters ua Turn of the all measurement function to measure voltage parameters Time On Turn on the all measurement function to Off measure Time parameters n Turn of the all measurement function to measure Time parameters Return Return to the All Measurements main menu Available for 4CH models only Available for 4CH models only Table 41 Types of Measurements T Lit Measures the absolute difference between the Vpp maximum and minimum peaks of the entire waveform The most positive peak voltage measured over the entire waveform
4. ce w gt 99 66 w 99 or 3 Set up pulse width Turn the Universal knob to set up width 55 Video Trigger Trigger on fields or lines of standard video signals Table 18 Functional Menu of Video Trigger 1 Available for 4CH models only Setting Type Video Select the video type trigger Set the coupling to AC to trigger the NTSC PAL and SECAM video signal Source Select the input source to be the trigger signal EXT Ext and Ext 5 use the signal applied EXTY5 to the EXT TRIG connector as the source Polarity Normal Normal triggers on the negative edge of the sync pulse Inverted Inverted triggers on the positive edge of the sync pulse Sync All lines Line Num Select appropriate video sync Odd field Even Field Next Page Page 1 2 Enter the second page of Video trigger menu 56 TRIGGER Type Video Source CH1 Polarity 1 Sync 4 Odd Field Mext Page Page T2 M SEE ps Figure 32 Video Trigger Screen Table 19 Functional Menu of Video Trigger 2 Setting Type Video Select the video type trigger Set the coupling to AC to trigger the NTSC PAL and SECAM video signal Standard NTSC Select the video standard for sync Pal Secam and line number count Mode Auto Use this mode to let the acquisition free run in the absence of a valid trigger This mode allows an untriggered scannin
5. 4 Press the Save to option button to select File 5 Press the Save option button then go into the Save Recall interface 6 Choose the file you want then press the Load option button about five seconds there be a message Recall data success displayed on the screen Now the waveform data have been recalled from the USB flash drive Save Picture Screenshot The display screenshot can be saved to a USB flash drive but they cannot be recalled Images can be opened on a computer Table 47 Picture Storage Function Menu Type Picture Select save screenshot oe Saves screenshot to USB flash drive 103 SA VEREC Type 4 Picture M 18 0ns Figure 62 Save Picture Screen To save waveform images to USB flash drive follow the steps below 1 Select the screen image that you want 2 Press the SAVE RECALL button to enter SAVE RECALL menu 3 Press the Type option button to select Picture 4 Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized the USB flash drive about five seconds 5 Press the Print Key option button to save the screenshot image to the USB flash drive 6 Alternatively you can customize the file name to save into by pressing the Save option 7 The SAVE ALL menu will display Select New File and enter the filename 8 Press the Confirm
6. 91 FFT 39 Filter 31 Hanning 42 Keyboard Test 115 Language 108 Math Functions 37 Pass Fail 118 Peak Detect 72 Persist 76 Polarity 56 Probe Attenuation 18 Probe Compensation 19 Pulse Trigger 53 Recalling Files 95 REF 45 Rise 91 S div 47 Sampling 71 Save Picture 104 Screen Test 114 Self Calibration 113 Self Test 114 SET TO 50 22 Sinx x 71 Slope Trigger 59 Storage 94 Sync 56 System Status 111 Time Domain Aliasing 74 Track Mode 84 Trigger 49 Trigger status 13 Universal Knob 27 Updating 117 Utility 107 Video Trigger 55 Vmax 90 Vmin 90 Volts Div 33 Vpp 90 Waveform Recorder 122 Window 39 Window Zone 48 X Y Format 80 Appendix C Disabling Auto Function The 2550 series has the ability to disable the Auto button that would automatically setup the scope to display a signal circumventing the need to know how to set up scope parameters This feature could be used by educators as a teaching tool for basic oscilloscope operation To receive information on how to disable this Auto button function please contact B amp K Precision at http www bkprecision com contact_us 156 SERVICE INFORMATION Warranty Service Please go the support and service section on our website www bkprecision com to obtain a RMA Return the product in the original packaging with proof of purchase to the address below Clearly state on the RMA the performance problem and return
7. After the Confirm option button is pressed a Data Store Success message is briefly shown and the new folder or file will be listed under your USB flash drive Save Recall Setup e Save Setups to Device The complete setup is stored in nonvolatile memory When you recall the setup the oscilloscope will be in the mode from which the setup was saved The oscilloscope saves the current setup if you wait three seconds after the last change before you power off the oscilloscope The oscilloscope recalls this setup the next time you apply power Table 42 Save Setup to Device Function Menu Type Setups Menu for the Storage Recall setting in the oscilloscope Save to Device Save setup to the oscilloscope s internal memory Setup No 1 to No 20 Press the Setup option button or turn the universal knob to select storage location Save to the selected storage location Recall Recall from the storage location indicated by Setup SA VEFREC Type 4 Setups Save To getup Mo Fave Fecall M 1 0ns Figure 57 Save Rec Menu To save setups to the oscilloscope s internal memory follow the steps below For example Save setup that set waveform display type to Dots to internal memory 1 Press the SAVE RECALL button to enter the SAVE RECALL menu Press the Type option button to select setups Press the Save to option button to select Device Press th
8. Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements 17 Note To avoid electric shock when using the probe keep fingers behind the guard on the probe body To avoid electric shock while using the probe do not touch metallic portions of the probe head while it is connected to a voltage source Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements Probe Attenuation Probes are available with various attenuation factors which affect the vertical scale of the signal The Probe Check function verifies that the Probe attenuation option matches the attenuation of the probe You can push a vertical menu button such as the CH 1 MENU button and select the Probe option that matches the attenuation factor of your probe Note The default setting for the Probe option is 1X Be sure that the attenuation switch on the probe matches the Probe option in the oscilloscope Switch settings are 1X and 10X Note When the attenuation switch is set to 1X the probe limits the bandwidth of the oscilloscope to 10 MHz according to Probe spec To use the full bandwidth of the oscilloscope be sure to set the switch to 10X 18 Probe Compensation As an alternative method to Probe Check you can manually perform this adjustment to match your probe to the input channel Figure 10 Probe Compensation Setup
9. P2553 2555 2556 2557 2558 2559 Inputs Inputs Coupling Impedance 50 Q 2 Maximum 400 V DC AC PK PK 1 MQ input impedance X10 input CAT I voltage Ch to Ch gt 100 1 at gt 100 1 at gt 100 1 at gt 100 1 at 150 Isolation 35 MHz 50 MHz 100 MHz MHz Both channels in same V div setting attenuator Probe 1X a 10X 50X 100X 500X 1000X attenuations selectable 144 2553 2555 2556 2557 2558 2559 Vertical System Vertical 2 mV div 10 V div 1 2 5 order Sensitivity Channel voltage offset range 2 mV 100 mV 800 mV 102 mV 5 V 40 V Resolution 4 2557 4 2559 Analog Bandwidth 3dB 70 MHz 100 MHz 200 MHz 300 MHz Single shot 70 MHz 100 MHz 200 MHz 300 MHz Bandwidth Lower frequency limit AC 3dB DC Gain lt 3 0 5 mV div to 5 V div in fixed gain ranges Accuracy lt 4 0 2 mV div in variable gain ranges DC Measurement Accuracy All Gain settings lt 100mV div DC Measurement Accuracy All Gain settings gt 100mV div lt 10 Hz at BNC input 3 lreading l loffsetl 1 loffsetl 0 2 div 2 mV 3 lreading l loffsetl 1 offset 0 2 div 100 mV 145 lt 2ns Equivalent to 2 minor divisions in smallest t div Ch to Ch Skew both channels in same V div setting operation Rectangular Sampling points 1024 Bandwidth 20 MHz 40 Note BW limited below 20 MHz when Limited using probe in x1 Common Specif
10. Press the MATH button to display the Math Menu Use the options to select the Source channel Window algorithm and FFT Zoom factor You can display only one FFT spectrum at a time You can select Full screen or Split in Display option to display FFT waveform on full screen or display channel waveform and its FFT waveform on half screen at a time 40 Figure 24 Math Function Screen MATH Operation FFT Source CH1 it j g i Diy Hanning FFT Zoor TK Mext Page Page T2 TEETE Set dBVrms to Time base Sampling be the vertical scale rate Scale unit Select FFT Window Windows reduce spectral leakage in the FFT spectrum The FFT assumes that the YT waveform repeats forever With an integral number of cycles there are no discontinuities in the signal shape A non integral number of cycles in the YT waveform cause the signal start and end points to be at different amplitudes The transitions between the start and end points cause discontinuities in the signal that introduce high frequency transients Table 11 FFT Window Instruction Characteristics Applications Rectangular Best frequency resolution Symmetric transients worst magnitude or bursts resolution This is Equal amplitude sine essentially the same as no waves with fixed window frequencies Broadband random noise with a relatively slowly varying po spectrum Hanning Better frequency poorer Sine periodic and Hamming magn
11. USING RE ie sorte vaeercetaa nan aoecaeoncreacamnieesotenacsede unease cnatiedecnenoaceeencuas 45 FIORIZON TAL SYSTEM esousauden vecosas sctesanesstaeuessonces ndectceune suas enaseueemeeeses 47 H rizontakControl KNOB aurrene iaar AT E TAER 47 WING OW ZONE suraia a a aeeRee tia 48 TRIGGER SYSTEM errian a siete e ete eeena den deeshakders 49 SIGH Ol SOUT CE erenn a sg onsataocnasavsaaaiiensate Giantess toes 50 THO GOP TV DCs siabsecortsicats r a vet baeadachandeanstaas ecard enone 50 COUPIO O a aie eer re octet see a seein nia ioe eas aes eared 68 POSITION size e teva sda viacuasas baa dananvacussecannuisautucuaen baa A E T 68 SIG DC GNO CV CN uranas a ein ieee 68 Toge r HOO ererrrenreee tree Meter terre er enC eee U ne te Senna peRAr Tet ere 69 SIGNAL ACQUISITION SYSTEM menos iien teiedaee erate essed 70 DISPLAY SYSTEM raturan rii a a T A E A AA 75 AVFO AC E EA E A EE AEE AE 79 MEASURE SYSTEM wacoscecsecac satarececca AE 80 Scale Megsuremeni roinainr n nea cake iw cuneate ened ROR Raat 80 Cursor IMICOSUTCINGIIG casei cassesanchaioeassaanasacaueteuecsaae E N 81 AUO IVICOSUICIN ONE a EE ds ot ales etal de NTE 86 STORAGE SYSTEM monere EEE A EOR 93 TETY SY SIE Merrien E E E E 107 SVEM S TOTUS aa E E A 111 LONG UGG C sieaa E Saa 111 sen COMOKOCUON o sera E T EE OE T E T 112 Self TEST aa a A a a a 113 Updating FI OU E srice a R EEEE 116 Pas STA eree a a T a 117 Waveform Recorder eono E E Seen hal ate a 121 RECOLTO aE A AAA 126 ELE VEN O aeo
12. button within five seconds there will be a message Save data success displayed on the screen Now the screenshot image has been saved to the USB flash drive Save Recall CSV Table 48 CSV Storage Function Menu Setting Description CSV Selects to save waveform data as a 104 Data Depth Displayed Set to store displayed waveform data to CSV file Maximum Set to store maximum waveform data to CSV file Para Save On Set whether to include waveform Off parameters in the CSV file or not Save Gow the SAVE ALL menu Pan Data Depth Displayed Para Save M 1 0ns Figure 63 Save to CSV Screen To save CSV files to USB flash drive follow the steps below 1 Press the SAVE RECALL button to enter SAVE RECALL menu 2 Press the Type option button to select CSV 3 Insert USB flash drive to USB host port of the oscilloscope and wait that the oscilloscope has initialized USB flash drive about five seconds 4 Press the Data Depth option button to select Displayed or Maximum 5 Press the Para Save option button to select On or Off 6 Press the Save option button then you ll go into the Save Recall interface 7 Create a file name then press the Confirm button within 5 seconds there will be a message Save data success displayed on the screen Now the CSV file has been saved to the USB flash drive 105 Note The m
13. DISDIOV informato eerie a a E N 13 PACKAGE CONTENTS airiran a Waa ep ute edemeeg erst 15 CHECKING PUNCTIONS rarei es E las coe 15 PROBE SAFETY oirun eva thaienadeulcs seta aheaka Wadeg eet adeer eens aahees 17 PROBE ATTENUATION lt ucccstanssdearisucssahaaedcitecutaw ena E 18 PROBE COMPENSATION sacenvssusesawe doses ri a TE 19 CHAPTER 2 FUNCTIONS AND OPERATING DESCRIPTIONS 20 MENU AND CONTROL BUTTON sscxsicageadecscnscnoaacushasdelasaonkeadee E R 21 CONNECTORS rea E E cele Staten Metsu et ti iea ts 23 AUTO SETUP cre 35 65 ss taenaGeest sesso ss natordua Wace sat aanegeeussecoce te aeeadentecaeesaneneres 24 DEFAULT SETU P dct snoss acsctesarabaneseacestecdeneeansetcean ceastaonsdaceuaeceeesnaseres 26 UNIVERSAL KNOB scs cctacaecbassecessnancegun laces a ENE AN 27 VERTICAL SYSTEM ceinetan E EON 28 CHANNEL FUNCTION MENU ssnssssssssssessesserssrsersreserssesersrrssessessessessesse 29 Setting UP CRONOE Snazim a aos 32 USING VERTICAL POSITION KNOB AND VOLTS DIV KNOB wei otdscvehontssebonds 36 MATA FUNCTIONS seisicheccitncussaaiachoceusGreecdaias E a oemesedencneies 37 PRT PU CU ON ire E hansen eter tetas Gans bun iee as easier hee rae 38 Displaying the FFT SPCCtrum ccccssscccssesccccnsscccsessccsansccsscesessassessaes 40 Select EFT WING OW serait dics aden sada E NA EEEO 41 Magnifying the FFT SP Ctrur cccccssssscccccssssecccccsssecessceseecssaaeseeeeens 42 Measuring an FFT Spectrum USING CUFSOTFS cssccsecneecsecneceestenecens 42
14. MATH AT 2 00MHZ eT TAC lls CurB 2 1 SMHz IMMER 1 25 8KHz Cur B a DEEE Figure 26 Measuring FFT Frequency NOTE The FFT of a waveform that has a DC component or offset can cause incorrect FFT waveform magnitude values To minimize the DC component choose AC Coupling on the source waveform To display FFT waveforms with a large dynamic range use the dB Vrms scale The dB Vrms scale displays component magnitudes using a log scale The Nyquist frequency is the highest frequency that any real time digitizing oscilloscope can acquire without aliasing This frequency is half that of the sample rate provided it is within the analog bandwidth of the oscilloscope Frequencies above the Nyquist frequency will be undersampled which causes aliasing 44 Using REF The reference control saves waveforms to a nonvolatile waveform memory The reference function becomes available after a waveform has been saved Table 12 REF Function Menu Source CH1 CH2 Choose the waveform display to store CH3 CH4 CH1 off CH2 off CH3 off CH4 off Choose the reference location to store or recall a waveform Save Stores source waveform to the chosen reference location Recall the reference waveform on the screen Turn off the reference waveform Available on 4CH models only Press the Ref button to display the Reference waveform menu 45 REF Wray Source WoltsP Figure 27 Reference Wa
15. Refer to the programming manual available for download at www bkprecision com 131 Chapter 4 Application Examples This section presents a series of application examples These simple examples highlight the features of the oscilloscope and give you ideas for using it to solve your own test problems e Taking simple measurements e Capturing a single shot signal e Analyzing signal detail e Triggering on a video signal e Application of X Y function e Analyzing a differential communication signal using math functions 132 Taking Simple Measurements Observe an unknown signal in a circuit display the signal quickly and measure the frequency and peak to peak amplitude 1 Using Auto set To quickly display a signal follow these steps Press the CH1 button set the Probe option attenuation to 10X and set the switch to 10X on the probe Connect the channel 1 probe to the signal Press the AUTO button The oscilloscope sets vertical horizontal and trigger controls automatically If you want to optimize the display of the waveform you can adjust these controls manually NOTE The oscilloscope displays relevant automatic measurements in the waveform area of the screen based on the signal type detected 2 Taking Automatic Measurements The oscilloscope can take automatic measurements of most displayed signals To measure signal frequency and peak to peak amplitude follow these steps Measure signal frequen
16. and channel 2 Screen Normal Set to normal mode Inverted Set to invert color display mode Grid Display grids and axes on the screen Turn off the grids Turn off the grids and axes Menu Set menu display time on screen Display 76 Press this button to enter the second Page page of Display menu DISPLAY Format Screen Grid Menu Display Infinite Mest Page Page 23 M 18 0ns Figure 46 Display Menu 2 Table 32 Display System Function Menu 3 Setting Classical Set up screen style Modern Tradition Succinct Next Page 3 3 Press this button to return to Page the first page 11 Operation Introduction Setup waveform display type 1 Press the DISPLAY button to enter the Display menu 2 Press the Type option button to select Vectors or Dots Set up Persist Press the Persist option button to select Off 1 Sec 2 Sec 5 Sec or Infinite You can use this option to observe some special waveforms DISPLAY Type Persist Infinite Intensity t 42 Brightness t TE Mext Fage M 1 0ns Figure 47 Persist Screen Setup Intensity Press the Intensity option button and turn the Universal knob to adjust waveforms intensity Setup Brightness Press the Brightness option button and turn the Universal knob to adjust grid bright
17. and video trigger Environmental Temperature Operating 50 F to 104 F 10 C to 40 C Not operating 4 F to 140 F 20 C to 60 C Cooling Humidity Operating 85 RH 104 F 40 C 24 hours Not operating 85 RH 149 F 65 C 24 hours Elevation Operating 9 842 5 ft 3 000m Nonoperating 50 085 3 ft 15 266m Control Panel Function Auto Set Auto adjusting the Vertical Horizontal system and Trigger Position Save Recall Save Recall 20 captured waveforms and 20 setups to from internal memory or to external USB flash drive Power Supply Input Voltage 100 240 VAC CAT II Auto selection Frequency Range 45 Hz to 440 Hz 50 VA Max 149 Dimensions WxDxH 14 1 x 6 14 x 4 65 inches 358 x 156 x 118 mm Weight 4CH models Approx 9 9 Ibs 4 5 kg 2CH models Approx 9 5lbs 4 3 kg Interface USB Front and rear panel USB host port forflash drives USB device port for PC communication supports SCPI for remote control Specifications are subject to change without notice To ensure the most current version of this manual please download the current version here http www bkprecision com search manual 255x For current up to date product information please visit www bkprecision com 150 Certification CE Compliant CE Declaration of Conformity The oscilloscope meets the requirements of 2006 95 EC Low Voltage Directive and 2004 108 EC Electromagnet Compatibility Directive Lo
18. confined to be made by only using points on the display and not all the data points recorded by the oscilloscope Press the MEASURE button for Automatic Test There are three auto measurement types Voltage Measure Time Measure and Delay Measure There are a total of 32 measurement parameters Table 36 Auto Measurement Function Menu 1 Voltage Press this button to enter the Voltage measurement menu Press this button to enter the Time measurement menu Press this button to enter the Delay measurement menu Mea the auto measurement menu 86 MEASURE Voltage All tea Mens Figure 51 Auto Measure Menu 1 Table 37 Auto Measurement Function 2 Voltage Measurement Menu Setting Source CH1 CH2 CH3 CH4 Select input signal source for Voltage measurement Type Vpp Vmax Vmin Vamp Press the Type button Vtop Vbase Vavg Mean or turn the Universal Vrms Cycle Vrms FOVShoot knob to select Voltage FPREShoot ROV Shoot measurement parameter RPREShoot Display the corresponding icon and measurementvalue of your selected Voltage measurement parameter Return to the first page of Return auto Measurement menu 87 Table 38 Auto Measurement Function 3 Time Measurement Menu Setting Source CH1 CH2 CH3 Type CH4 Freq Period Width Width Rise Time Fall Time BWidth Duty Duty Select input signal source for Time measurement Press the
19. elcuscoltis N cau taci oop eia ists 151 APPENDIX A DEFAULT SETUP dcccsesseciincccistcucesssecessaisdewvedsceeesace 152 APPENDIX B INDEX js csscsscsassesiccessccessessccarsecesvinscnsveriecsesiziiascsaess 155 APPENDIX C DISABLING AUTO FUNCTION sssecscscssesees 156 SERVICE INFORMATION vcsinissacisncciedesrcsceassexcenedewievssenvacncadevaess 157 LIMITED THREE YEAR WARRANTY cscsccscsccscsccscsccscesceees 158 Chapter 1 Introduction The 2550 series digital storage oscilloscopes DSO are portable benchtop instruments used for making measurements of signals and waveforms This chapter will highlight information on the following e Panel and display information e Package Contents e Checking functions e Probe Attenuation e Probe Compensation 10 Panel and Display Information Front Panel The following contents are a brief introduction for the front panel function which is useful to become familiar with the operation of the DSO C 69 i s b ya Figure 1 4 channel top and 2 channel bottom front panels 11 1 Power On Off button 2 USB Host port for storage to USB flash drives 3 LCD display 4 1 kHz probe compensation terminal 5 Menu On Off button 6 Function keys 7 Print button 8 Universal knob 9 Cursor Measure Acquire Display Save Recall Utility menu buttons 10 Help and default setup button 11 Run Controls Single Run Stop 12 Horizontal Con
20. not be running e No signal The system would display this information when the signal could not match the auto set condition while using the auto set function e Adjust at limit Prompts that the pulse width setting has reached min 20 0 ns or max 10 0 s e Location Empty If you have no stored waveforms or setups at specified location the screen will display this information when you press the Recall button on this location e USB Flash Drive Plug In This information will appear when you insert the USB Flash Drive to the USB Host port e USB Flash Drive Pull Out This information will appear when you pull out the USB Flash Drive from the USB Host port e Store Data Success Saving setup data waveform data or picture data to the internal memory of the oscilloscope or USB flash was successful 141 e Ready Data Success Read setup data or waveform data from the internal memory of the oscilloscope or USB flash was successful e USB Flash Drive isn t connected When the Save To option is set to File or the Print Key option is set to Save Picture in Save Recall menu press the Save option button or the Time div knob before inserting the USB Flash Drive to the USB Host port or this will appear on the screen e Record Wave Success This message will appear when you finish recording waveforms Troubleshooting 1 After the oscilloscope is powered on the screen remai
21. nothing displays Check whether or not the trigger mode on the trigger interface is in normal or single and then check the trigger level to see if it is over the waveform range If yes please move the trigger level to the middle position or set the trigger mode to the Auto position You can also press the Auto button to set it up automatically After the Acquisition is set to Averages or Display Persistence time is set too long the waveform refreshes slowly This is a normal condition for these settings The signal is displayed as a ladder like waveform 1 This phenomenon is normal The time base may be too slow Turn the horizontal SCALE knob to increase horizontal resolution to improve the display 2 Maybe the display Type is set to Vectors You could set it to Dots mode to improve the display 143 Chapter 6 Specifications e All specifications apply to measurements with a 10X probe To verify that the oscilloscope meets specifications the oscilloscope must first meet the following conditions o The oscilloscope must have been operating continuously for thirty minutes within the specified operating temperature o You must perform the Do Self Cal operation accessible through the Utility menu if the operating temperature changes by more than 5 C o The oscilloscope must be within the factory calibration interval e All specifications are guaranteed unless noted typical Specifications
22. test Waveform Recorder Press the Record option to record the input waveform from CH1 CH2 CH3 or CH4 with a maximum record length of 2500 frames The time between frames is adjustable You can record Pass Fail test output especially useful when capturing abnormal signals over a long period of time without having to watch the signal Table 59 Waveform Recorder Function Menu Setting 121 Mode Record Set Record function menu Play Back Set Play Back function menu Storage Set Storage function menu Off Turn off waveform recorder menu Select record source channel Set time interval between Interval 4 record frames End a Set max number of record Frame frames Operate Record Press to start recording E Stop Press to stop recording Available for 4CH models only RECORD Mode Record Source C H1 Interval 1 heme End Frame 1 Operate M 18 0ns Figure 76 Record Menu Screen 122 To record waveforms follow these steps L 8 Press the UTILITY button to enter Utility menu Press the Next Page option button to enter the third page of Utility menu Press the Record button to enter Waveform Record Menu Press the Mode option button to select Record Press the Source option button to select the input signal channel Select Interval option and turn the Universal knob to adjust time interval between record frames Sele
23. the second page of Play Back function menu Select the Start Frame option turn the Universal knob to adjust the start frame of play back waveform Select the End Frame option turn the Universal knob to adjust the end frame of play back waveform Press the Next Page 2 2 option button to return the first page of Play Back menu Press the P option button in Operate option to play back waveforms 125 Record This mode allows for gap free recording of waveform data and can be enabled in SCAN MODE only refer to Horizontal Control Knob section It is similar to the above described waveform recorder mode however the recorded data can only be played back on screen but cannot be retrieved Maximum recordable data depends on the timebase in scan mode Recorded data can also be stored into external USB flash drive Table 62 Waveform Recording Function Menu Record the waveform persistently Replay recorded waveform RECORDER Replay M i ms iri Pos I Figure 79 Record Screen Replay the recorded waveform Replay Copy Filename When Store Mode is set to USB key this will show the filename 126 CG used to store the recording a Store Mode Memory Stores recording to internal Stores recording to external USB flash drive Rem Return othe Recording Monu Continue Pause Continue Pause when playing back a waveform recording Restart the pl
24. to adjust the D t vertical position of the MATH waveform DNV Use universal knob to adjust the vertical scale of the MATH waveform Page 2 2 Go back to first page of MATH menu 37 Table 8 Math Function Description Source A waveform adds Source B waveform Source A waveform is subtracted A B from Source B waveform Source A multiply Source B AB Source A Source A divides SourceB Source B ee Fast Ja M E Setting Description A MATH Operation Source 4 CH2 Source H CHI Irvert Mest Fage Page T2 M 250ps Figure 23 Math Waveform FFT Function The FFT process mathematically converts a time domain signal into its frequency components You can use the Math FFT mode to view the following types of signals e Analyze the harmonic wave in a power cable e Test the harmonic content and distortion in a system 38 e Show the Noise in a DC power supply e Test the filter and pulse response in a system e Analyze vibration Table 9 FFT Function Menu 1 Source CH1 CH2 Select this channel as the FFT source CH3 CH4 Window Hanning Select FFT window types Hamming Rectangular Blackman FFT ZOOM Changes the horizontal magnification of the FFT display 5X 10X Page 1 2 Enter the second page of FFT menu ACH models only Table 10 FFT Function Menu 2 Scale Set Vrms to be the Vertical Scale unit Set dB Vrms to be the vertical Scale unit Disvla Split Di
25. to the left of the trigger point This is also called the pre trigger 2 Continue to acquire data while waiting for the trigger condition to occur 3 Detect the trigger condition 4 Continue to acquire data until the waveform record 1s full 5 Display the newly acquired waveform Time Base The oscilloscope digitizes waveforms by acquiring the value of an input signal at discrete points The time base allows you to control how often the values are digitized To adjust the time base to a horizontal scale that suits your purpose use the Time div knob Time Domain Aliasing Aliasing occurs when the oscilloscope does not sample the signal fast enough to construct an accurate waveform record When this happens the oscilloscope displays a waveform with a frequency lower than the actual input waveform or triggers and displays an unstable waveform Actual high frequency waveform gt Apparent low frequency waveform due to aliasing Sampled points gt Figure 42 Time Domain Aliasing 73 Operating Instructions Set up Sampling Format You can press the Acquisition option button or turn the Universal knob to select Sampling mode Peak Detect mode or Average mode Set up Averages When you select Average format you can press the Averages option button to select 4 16 32 64 128 or 256 Set up function interpolation You can sele
26. two irrelative signals at the same time Channels CHX CHY Select any two channels from CH1 CH2 CH3 or CH4 as the sources for alternating trigger CH1 CH2 CH3 CH4 Selects the source channel Mode Slope Set trigger type of the vertical channel signal to slope trigger Page 1 2 Enter the second page of the alternate trigger Available for 4CH models only Table 28 Set Trigger Mode to Slope Trigger Function Menu 2 Select slope trigger condition Time 4 Turn the Universal knob to set the slope Set time time Time setup range is 20ns 10s 66 Vertical Select the trigger level that can be adjusted by LEVEL knob You can adjust LEVEL A LEVEL B or adjust them at the same time Selections depend on slope trigger condition Setup OA Enter the Trigger setup menu Next Page Page 2 2 Return to the first page of Alternate trigger menu Operation Instructions To observe two irrelative channel signals follow these steps 1 Input two irrelative signals to channel 1 and channel 2 Press the AUTO button Press the TRIG MENU button to enter trigger menu Press the Type option button to select Alternate Press the Channels option button to select CH1 CH2 Press the Source option button to select CH1 Press the CH1 button and turn the Time div knob to optimize waveform display 8 Press Mode option button to select Edge
27. 1 Set the Probe option attenuation in the channel menu to 10X Do so by pressing CH1 button and selecting Probe from menu Select 10X Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope If you use the probe hook tip ensure a proper connection by firmly inserting the tip onto the probe 2 Attach the probe tip to the PROBE COMP 3V connector and the reference lead to the PROBE COMP Ground connector Display the channel and then push the AUTO button 3 Check the shape of the displayed waveform Compensated Correctly Undercompensated 4 Ifmnecessary adjust your probes compensation trimmer pot Repeat as necessary 19 Chapter 2 Functions and Operating Descriptions This chapter will cover all the functions and operations of the oscilloscope e Menu and control button e Connector e Auto Setup e Default Setup e Universal knob e Vertical System e Horizontal System e Trigger System e Acquiring signals System e Display System e Measuring waveforms System e Utility System e Storage System e Online Help function 20 Menu and Control Button Moagure Wavetorn Vertical POSITION POSITION POSITION POSITION cH es CHS CHa VOLTS DIV VOLTS DIV REF VOLTS Div VOLTS Div Figure 11 Control Buttons 4CH model shown Warniee Channel buttons CH1 CH2 CH3 CH4 Press a channel button CH1 CH2 CH3 or CH4 to turn that channel ON o
28. CH1 CH2 CH3 CH4 Input connectors for waveform display EXT TRIG Input connector for an external trigger source Use the Trigger Menu to select the Ext or Ext 5 trigger source Probe Compensation kHz voltage probe compensation output and ground Use to electrically match the probe to the oscilloscope input circuit 23 Note Do not connect a voltage source to the ground terminal or it may damage the oscilloscope Auto Setup The 2550 series Digital Storage Oscilloscopes have an Auto Setup function that identifies the waveform types and automatically adjusts controls to produce a usable display of the input signal Press the AUTO front panel button and then press the menu option button adjacent to the desired waveform as follows M SA ps MM Pos 4 Aa vs Figure 13 Auto Setup Note For AUTO set to function properly the signal frequency must be gt 5 Hz There will be a short time delay when using AUTO to setup 4 channels 24 Table 1 Autoset Menu Auto set the screen and display Multi cycle sine multi cycle signal Set the screen and auto display single IL l cycle signal Single cycle sine Auto set and show the rising time ne 5 Rising edge A Auto set and show the falling time Falling edge gt Causes the oscilloscope to recall the Undo Soa previous setup Auto set determines the trigger source based on the following conditions e If multiple channels
29. Calibration procedure can optimize the signal path for optimal measurement results You can run this procedure at any time If the operating temperature changes by more than 5 C or the instrument runs more than thirty minutes running self calibration is recommended When you run the self Calibration you must disconnect all the probes and leads and make sure the scope is not in Single Shot mode Then press the Utility button to choose the Do self cal to show the self Calibration Menu and execute self calibration program according to the prompt on the screen 112 Disconnect Everything Trom All Inputs Doing CH4 Calfstep 1 29 Figure 68 Calibration Screen Self Test Press UTILITY and select Do Self Test Table 54 Self Test Menu Run Screen Test Program Keyboard Test Run Keyboard Test Program LED Test Run LED Test Program Screen Test Select Screen Test to enter the screen test interface The message Press SINGLE Key to continue Press RUN STOP Key to exit is displayed Press Single button to run through the screen color test or press Run Stop to exit 113 Figure 69 Screen Test Start Screen Keyboard Test Select Keyboard Test to enter the key test interface The on screen shapes represent the front panel keys The shapes with two arrows beside them represent the front panel knobs The squares represent the knob presses for scale knobs T
30. E E one 129 CHAPTER 3 REMOTE CONTROL csccccsceccscescsccsccccscescsceecs 131 CHAPTER 4 APPLICATION EXAMPLES ccscsccscscescecescescecs 132 TAKING SIMPLE MIEASUREMENTS cccesecceseccesccetseceneecaeceeaeeeeeeeeaes 133 MEASURING RING FREQUENCY ccccecececescccececsscueeesceseseueeeeseseseuss 134 Measuring Ring Amplitude cccscccccsseecccsesscccaessccsanscesaeeecsaeseees 135 CAPTURING A SINGLE EVENI ossiexsie ces iiies ten cents Sarto terd acter sales 135 ANALYZING SIGNAL DETAILS cacceiscstcicants cate nchvacevaleesine meri kaneis 136 LOOKING ata NOISY Signali aenea E te ease aes 136 Separating the Signal from Noise ssssccccssessccccansscececassscsseneesees 137 TRIGGERING ON A VIDEO SIGNAL cccececececcececsceseeeeeececeseueeenceseseues 137 Triggering ON Video Field cccccsesccccsescccsnsscccassccsaesecsaussessauseesauases 137 TAGOCTING ON Vdeo LINCS srana a E dee ereyeses Mevaetueess 137 APPLICATION OF X Y FUNCTION sssccsccaccssessneveescvdevccesansenseasbaveseccesese 138 ANALYZING A DIFFERENTIAL COMMUNICATION SIGNAL ossessi 139 CHAPTER 5 MESSAGE PROMPTS AND TROUBLESHOOTING 141 IVIESSAGE PROMPTS cuts cnet atm talline ae AA 141 TROUBLESHOOTING oair et ices us ote ih sce sia 142 CHAPTER 6 SPECIFICATIONS vsssascisccsccdeseratessiaievcteerwtenncr case 144 SPECIFICATIONS veces cate seculacavechGoncuansdoseecatadeuand anteseabosicusuidosevaetes 144 CERTIFICATION cccovetensur ont
31. FORCE Button Use the FORCE button to complete the current waveform acquisition whether the oscilloscope detects a trigger or not This is useful for SINGLE acquisitions and Normal trigger mode Signal Source You can use the Trigger Source options to select the signal that the oscilloscope uses as a trigger The source can be any signal connected to a channel BNC to the EXT TRIG BUS or the AC power line available only with Edge Trigger Trigger Type The scopes have five trigger types Edge Video Pulse Slope and Alternate Edge Trigger Use Edge triggering to trigger on the edge of the oscilloscope input signal at the trigger threshold Table 14 Edge Trigger Function Menu Type Edge With Edge highlighted the rising or falling edge of the input signal is used for the trigger Source Triggers on a channel whether or not the waveform is displayed 50 EXT Does not display the trigger signal the Ext option uses the signal connected to the EXT TRIG front panel BNC and allows a trigger level range of 1 2 V to 1 2 V EXT 5 Same as Ext option but attenuates the signal by a factor of five and allows a trigger level range of 6 V to 6 V This extends the trigger level range AC Line This selection uses a signal derived from the power line as the trigger source trigger coupling is set to DC and the trigger level to O volts Slope Trigger on Rising edge of the trigger signal Trigger on Falling edge of the t
32. HB ps CHi 132 hl Pos AAA ps 1 87 15 17 A3 Figure 17 Bandwidth Limit 3 Volts Div Settings Vertical scale adjust have Coarse and Fine modes Vertical sensitivity range of 2 mV div 10 V div Take CH1 for example e Press CH1 Volts Div Coarse It is the default setting of Volts Div and it makes the vertical scaling in a 1 2 5 step sequence from 2 mV div 5 mV div 10 mV div to 10 V div Coupling D Ey Limit Cnt vots Di Coarse Frohe TK Mest Page a raaa M SAB ps CHi LIZ M Pos HHH ps 5 Sh ich Figure 18 Coarse Control 33 e Press CH1 Volts Div Fine This setting changes the vertical control to small steps between the coarse settings It will be helpful when you need to adjust the waveform vertical size in smaller steps 4 Setting Probe Attenuation In order to set the attenuation coefficient you need to specify it in the channel operation Menu If the attenuation coefficient is 10 1 the input coefficient should be set to 10X so that the Volts div information and measurement testing is correct Take CH1 for example when you use the 100 1 probe e Press CH1 Probe 100X SS CH1 Coupling D By Lirrit Ott volts Di Coarse Frohe 108 Mest Fage M SHB ps M Pos 6 88 ps Figure 19 Setting Probe Attenuation 5 Inverting waveforms Take CH1 for example e Press CH1 Next Page page 1 2 Invert
33. PPIemal Pie WiwviViv BK LAE 2553 2555 2556 2557 2558 2559 4CH 2CH Digital Storage Oscilloscopes USER MANUAL Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation service and repair of this instrument Before applying power follow the installation instructions and become familiar with the operating instructions for this instrument If this device is damaged or something is missing contact the place of purchase immediately This manual contains information and warnings must be followed to ensure safe operation as well as to maintain the oscilloscope in a safe condition GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground This instrument is grounded through the ground conductor of the supplied three conductor ac power cable The power cable must be plugged into an approved three conductor electrical outlet Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safety standards DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes
34. TION knobs to optimize the display Press the Persist option button and select Infinite Press the Intensity or Brightness option buttons and turn the Universal knob to adjust the contrast of the screen Apply the Ellipse method to observe the phase difference between the two channels 138 Sin 0 A B or C D where 0 phase shift in degrees between the two signals from the formula above you could get tarcsine A B or tarcsine C D If the main axis of the ellipse is at II and IV quadrant must be in the range of 0 2 2 or 32 2 27 If the main axis is at I and III quadrant 0 must be in the range of a 2 7 or n 37 2 Analyzing a Differential Communication Signal You are having intermittent problems with a serial data communication link and you suspect poor signal quality Set up the oscilloscope to show a snapshot of the serial data stream so you can verify the signal levels and transition times Because this is a differential signal you use the math function of the oscilloscope to view a better representation of the waveform To activate the differential signals connected to channel 1 and channel 2 follow these steps L Aa a Press the CH 1 button and set the Probe option attenuation to 10X Press the CH 2 button and set the Probe option attenuation to 10X Set the switches to 10X on the probes Press the AUTO button Press the MATH b
35. The most negative peak voltage measured over the entire waveform Voltage between Vhig and Vlow of a waveform 89 eu Measures the highest voltage over the entire air waveform Measures the lowest voltage over the entire ee waveform The arithmetic mean over the first cycle in the The aimee mean over the entire waveform The true Root Mean Square voltage over the first cycle in the waveform The true Root Mean Square voltage over the entire waveform Defined as Vmax Vhig Vamp after the waveform rising Defined as Vmin Vlow Vamp after the waveform falling Defined as Vmin Vlow Vamp before the waveform rising Defined as Vmax Vhig Vamp before the waveform falling Measures the frequency of the waveform Measures the period of the waveform Rise Time Measures the time between 10 and 90 of the first rising edge of the waveform Fall Time Measures the time between 90 and 10 of the first falling edge of the waveform The duration of a burst Measured over the entire waveform Width Measures the time between the first rising edge and the next falling edge at the waveform 50 level 90 Width Measures the time between the first falling edge and the next rising edge at the waveform 50 level Measures the first cycle waveform Positive Duty Cycle is the ratio between positive pulse width and period Measures the first cycle waveform Negative Duty Cycle is the ratio between negative puls
36. a definite safety hazard KEEP AWAY FROM LIVE CIRCUITS Instrument covers must not be removed by operating personnel Component replacement and internal adjustments must be made by qualified maintenance personnel Disconnect the power cord before removing the instrument covers and replacing components Under certain conditions even with the power cable removed dangerous voltages may exist To avoid injuries always disconnect power and discharge circuits before touching them DO NOT SERVICE OR ADJUST ALONE 3 Do not attempt any internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT Do not install substitute parts or perform any unauthorized modifications to this instrument Return the instrument to B amp K Precision for service and repair to ensure that safety features are maintained WARNINGS AND CAUTIONS WARNING and CAUTION statements such as the following examples denote a hazard and appear throughout this manual Follow all instructions contained in these statements A WARNING statement calls attention to an operating procedure practice or condition which if not followed correctly could result in injury or death to personnel A CAUTION statement calls attention to an operating procedure practice or condition which if not followed correctly could result in damage to or destruction of part or all of the prod
37. any leads probes connectors and accessories that you are using with the device Non Warranty Service Please go the support and service section on our website www bkprecision com to obtain a RMA Return the product in the original packaging to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Customers not on an open account must include payment in the form of a money order or credit card For the most current repair charges please refer to the service and support section on our website Return all merchandise to B amp K Precision Corp with pre paid shipping The flat rate repair charge for Non Warranty Service does not include return shipping Return shipping to locations in North America is included for Warranty Service For overnight shipments and non North American shipping fees please contact B amp K Precision Corp B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 Include with the returned instrument your complete return shipping address contact name phone number and description of problem 157 LIMITED THREE YEAR WARRANTY B amp K Precision Corp warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials for a period of three years from date of purchase B amp K Precision Cor
38. aximum number of data points of a waveform that can be saved as a CSV file into USB drive is 24576 pts depending on the timebase setting when data depth is set to maximum The actual number depends on the time base setting the channels that are active and whether data depth is set to display or maximum See below table for maximum data points available in each timebase when data depth is set to maximum Number of points saved to CSV file ee ee Time base Half channel Per channel O ee 50550 ms 25 ns fastest time 24k 12k base For 4CH models CH1 and CH2 are interleaved and CH3 and CH4 are interleaved Half channel operation means only CH1 or CH2 and or CH3 or CH4 are active For 2CH models CH1 and CH2 are interleaved Note 24 k refers to 24756 points 12 k refers to 12288 points 106 Utility System Press the UTILITY button from the front panel to access utility options Table 49 Utility System Function Menu 1 Option Setting Description e a summaries of the Status oscilloscope settings Sound fle Open the key press voice k k efix Close the key press voice Counter On Turn on Frequency Counter Off Turn off Frequency Counter Language English English Fran ais French H AGE Japanese Ska Of Korean Deutsch German Espanol Spanish Pycckun Russian Italiana Italian Portugu s Portuguese An all Arabic fa PASHAN Simplified Chinese ee Traditional Chinese Page 1 4 Press
39. ayback of the recorded waveform Recall the waveform recording Next Fast forward play the recalled waveform recording Return to the Recording Menu REPLAY M i ms MI Fos AA Ds Figure 80 Replay Screen Table 63 Recording Setting Menu Display full screen of the waveform recording and channel recalling 127 Split Display split screen of the waveform recording and channel recalling CH1 is displayed in the upper half screen and CH2 is displayed in the lower half screen For 4CH models CH1 and CH2 are displayed in the upper half screen and CH3 and CH4 are displayed in the lower half screen Record Mode roll Recorder saves the channel waveform persistently the latter waveform will cover the former single Recorder will stop waveform saving when its memory is full Replay Mode By point When recalling the screen waveform refresh from left to right By frame When recalling screen waveform will refresh completely according to the capturing time of each frame Return Exit the Recording Setting Menu OPTION Full Screen Record continuous Replay By point M i ms wi rus 5 Figure 81 Option Screen 128 Recorder Operation step L 2 A Press the UTILITY button to enter Utility menu Press the Next Page option button to enter the fourth page of Utility menu Press the Recorder button to enter the Recorder menu Press the Optio
40. bove the bandwidth will not be accurate e If the channel is set to DC coupling you can quickly measure the DC component of the signal by simply noting its distance from the ground symbol e If the channel is set to AC coupling the DC component of the signal is blocked allowing you to use greater sensitivity to display the AC component of the signal 31 Setting Up Channels Each channel has its own separate Menu The items are set up separately according to each channel 1 Setup Channel Coupling Take CH1 for example the tested signal is a sine wave signal with DC deflection e Press CH1 Coupling AC Set to AC couple mode This will block the DC component of the input signal e Press CH1 Coupling DC Set to DC couple mode Both DC and AC components of the input signal will be captured e Press CH1 Coupling GND Set to GROUND mode This disconnects the input signal CH1 Coupling D Ehi Limit Ott vots Ci Coarse Frohe TK Mest Page M SAG ps M Pos fF Aa us Figure 16 DC Coupling 2 Bandwidth Limiting Take CH1 for example e Press CH1 gt BW Limit On and bandwidth will be limited to 20 MHz e Press CH1 BW Limit Off and bandwidth limit will be disabled 32 Coupling D E Limit On volts Di Coarse Frohe TK Mest Page Volts Pos 88m B 1 eae8GKHz Page 13 CHi Lee M S
41. cilloscope is looking for a signal or when timebase is set slow enough in which the scope requires longer time to scan in order to acquire the entire signal on display Displays position of the present waveform window in internal memory Marker shows horizontal trigger position Turn the HORIZONTAL POSITION KNOB to adjust the position of the marker Print Key Indicates whether the PRINT KEY option is set to print picture or save picture amp Print Key option is set to Save Picture Back USB Indicates whether the BACK USB option is set to Computer USBTMC or Printer Back USB option is set to Computer B ack USB option is set to Printer not available Waveform channel number tag On screen markers show the ground reference points of the displayed waveforms If there is no marker the channel is not displayed Display signal source Signal Coupling Symbol Vertical scale factor of corresponding channels Indicates whether the bandwidth limiting filter is On or Off The B icon indicates the filter is On Main time base scale setting Horizontal position of main time base waveform 14 13 Shows the icon for the trigger type 14 Displays real time and date 15 Shows the trigger voltage 16 Trigger signal frequency Package Contents The digital storage oscilloscopes are shipped with the following contents 2550 series Digital Storage Oscilloscope User Manua
42. ct End Frame and turn the Universal knob to adjust the max record frame Press gt in Operate option to record waveform Play Back Play back current recorded waveforms or recorded waveforms that have been saved Table 60 Waveform Playback Function Menu 1 Setting Back Set the Play Back function menu hall ndani Run Press to start playback E ms a Press to stop playback Mode Set single time play mde so nin frames Back menu 123 RECORD Mode 4 Play Back Operate Play ful E de Interval 16 8ms Mext Page Page T2 SHH ee dh S M eins Figure 77 Record Menu Screen 2 Table 61 Waveform Playback Function Menu 2 Setting Start Frame Curr_Frame 4 Select current frame to be played Set End frame Return Press to return to the waveform recorder main menu Next Page Page 2 2 Return to the first page of Play Back function menu 124 RECORD Start Frame 1 Curr _trame 2 1 End Frame 1 Next Page M eins Figure 78 Record Menu Screen 3 To play back current record waveforms follow these steps L 2 3 Press UTILITY button to enter Utility menu Press the Mode option button to select Play Back Press the Play Mode option button to select adios E or Press the Interval option button to select time interval between play back frames Press the Next Page 1 2 to enter
43. ct Slope trigger 1 Input a signal to one of the channel inputs 2 Press the AUTO button 61 3 Press the TRIG MENU button to enter Trigger menu Press the Type option button to select Slope 5 Press the Source option button to select CH1 CH2 CH3 or CH4 CH3 and CH4 available for 4CH models only 6 Press the When option button to select hi te KE e E e E e E or SHE 7 Press the Time button and turn the Universal knob to adjust slope time 8 Press the Next Page Page 1 2 option button to enter the second page of the Slope trigger menu 9 Press the Vertical option button to select a trigger level that can be adjusted 10 Turn the LEVEL knob r Alternate Trigger The trigger signal comes from two vertical channels when you use alternate trigger In this mode you can observe two unrelated signals at the same time You can select different trigger types for two vertical signals Different types include edge pulse video and slope trigger Trigger information for both channels will display on the bottom right of the screen TRIGGER Type 4 Alternative Channels 1 CHEHCH Source Mode Edge Next Page Page T2 Figure 36 Alternate Trigger Menu 62 Table 22 Set Trigger Mode to Edge Trigger Function Menu 1 Type Alternate The trigger signal comes from two vertical channels when you use a
44. ct Sinx interpolation or linear interpolation aes G m ACQUIRE Acquisition 4 Sampling Sirah Sirs Mlode Sa Rate 100065a G ACOUIRE Acquisition 4 Sampling SINK F tode Sa Rate 200068a Figure 44 Linear Interpolation 74 Set up Sampling mode Press the Mode option button to select Real Time or Equ Time Set up Sampling rate Adjust the sampling rate by pressing the Sa Rate option button and turning the Time div front panel knob The sampling rate is shown at the corresponding timebase scale Display System The display function can be setup by pressing the DISPLAY button Table 30 Display System Function Menu 1 Setting Type Vectors Vectors Fills the space Dots between adjacent sample points in the display Dots There is no link between adjacent sample points i Sets the length of time 1 sec each displayed sample 2 sec point remains displayed Persist 5 sec Infinite lt Intensity gt intensity Brightness 4 Set grid brightness lt Brightness gt Next Page Page 1 3 Press this button to 75 DEPLAY Type Persist Ort Intensity 56 Brightness Ton Met Fage Fage T3 M 18 0ns Figure 45 Display Menu Screen Table 31 Display System Function Menu 2 Setting Format YT YT format displays the vertical voltage in relation to time horizontal scale XY XY format displays a dot each time a sample is acquired on channel 1
45. cy 1 Input the signal to channel 1 2 Press the AUTO button 3 Press the MEASURE button to see Auto Measure Menu 4 Press the top option button 5 Press the Time option button to enter the Time Measure menu 6 Press the Source option button to select input signal channel 7 Press the Type option button to select Freq The corresponding icon and measure value will display on the third option area Measure signal peak to peak amplitude 1 Press the MEASURE button to display Auto Measure Menu 2 Press the top second option button 3 Press the Voltage option button to enter the Voltage measure menu 4 Press the Source option button to select input signal channel 133 5 Press the Type option button to select Vpp The corresponding icon and measure value will display on the third option area Measuring Ring Frequency To measure the ring frequency at the rising edge of a signal follow these Steps A ae 6 Press the CURSORS button to see the Cursor Menu Press the Mode button to select Manual Press the Type option button and select Time Press the Source option button and select CH1 Press the CurA button and turn the universal knob to place the cursor A on one peak of the ring Press the Cur B button and turn the universal knob to place the cursor B on
46. e Setup option button to select No 1 Press the DISPLAY button to enter the Display menu Press the Type option button to select Dots Press the SAVE RECALL button to enter the SAVE RECALL menu 8 Press the Save option button To Recall setup follow steps below 1 Press the SAVE RECALL button to enter the SAVE RECALL display menu 2 Press the Type option button to select Setups Press the Save to option button to select Device 4 Press the Setup option button or turn the Universal knob to select No 1 5 Press the Recall option button oe te E eS 97 e Save Setup to USB Flash Drive Table 43 Save Setup to USB Flash Drive Function Menu Menu for the Storage Recall settings Save setup data to USB flash drive an ae Go to the Save Recall interface SAVEREC Type 4 Setups Save To M eins Figure 58 Save Setup Screen Save Setup to USB Flash drive For example Save setup that set waveform display type to Dots to USB flash drive 1 Press the SAVE RECALL button to select Setups Insert USB flash drive to USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive about five second 3 Press the Save to option button to select file 4 Press the Save option button to go into the Save Recall interface 98 Press the Ne
47. e 1 2 Press this button to enter the Page second page of Mask Setting menu 119 Wask 1 84diy Y Mask 4 68diw Next Page 3 Page 12 Mext Fage Hz Fage Ze 120 RUN Pass Fail test please follow the steps below L 10 11 Press UTILITY button to enter the Utility menu Press the Next Page Page1 4 option button Press the Next Page Page2 4 option button to enter the third page of Utility menu Press the Pass Fail option button to enter the Pass Fail function menu Press the Enable Test option button to select On Press the Source option button to select input signal channel Press the Next Page Pagel 2 option button to enter the second page of the Pass Fail menu Press the Mask Setting option button to enter the first page of the Mask menu Press the X Mask button turn the Universal knob to adjust the horizontal clearance Press the Y Mask button turn the Universal knob to adjust the vertical clearance Press the Create Mask button to create mask and you can also enter the next page of Mask menu to recall the stored mask Enter the second page of Pass Fail function menu press the Output option button to set the output option Enter the first page of Pass Fail function menu press the Operate option button to select P gt to run the pass fail
48. e a single event 1 Set the Probe option attenuation to 10X and set the switch to 10X on the probe 2 Trigger set up 1 Press TRIG MENU button to show the Trigger Menu 2 Under this menu set the trigger type to edge Edge type is Rising source is CH1 trigger mode is Single coupling is DC 3 Adjust the horizontal time base and vertical scale to the satisfied range 4 Turn the LEVEL knob to adjust the trigger level 5 Press the RUN STOP button to start capturing When the trigger conditions are satisfied data appears on the display representing the data points that the oscilloscope obtained with one acquisition and press the RUN STOP button again rearms the trigger circuit and erases the display Analyzing Signal Details You have a noisy signal displayed on the oscilloscope and you need to know more about it You suspect that the signal contains much more detail than you can now see in the display Looking at a Noisy Signal The signal appears noisy and you suspect that noise is causing problems in your circuit To analyze the noise better follow these steps 1 Press the ACQUIRE button to see the acquire menu 2 Press the Acquisition option button or turn the Universal knob to select Peak Detect 3 Ifmecessary press the DISPLAY button to see Display menu Turn the Universal knob to adjust waveform intensity and grid brightness to se
49. e oscilloscope amplifies or attenuates the source signal of channel waveforms When you turn the volts div knob the oscilloscope increases or decreases the vertical size of the waveform on the screen with respect to the ground level 2 When you press the Volts div Knob you can switch Volts div option between Coarse and Fine The vertical scale is set by the 1 2 5 step in Coarse mode Increase by turning the knob in the clockwise direction and 36 decrease by turning the knob in the counterclockwise direction In Fine mode the knob changes the Volts Div scale in small steps between the coarse settings Again increase in the clockwise direction decrease in the counterclockwise direction Math Functions Math shows the results after and FFT operation between two channels from CH1 to CH4 CH3 and CH4 available for 4CH models only Press the MATH button to display the math waveform and menu Press the MATH button again to remove the math waveform display Table 7 Math Function Menu Setting Description Operation FFT Math operations between Source A and Source B Source A CH1 CH4 Select CH1 CH2 CH3 or CH4 as Source A Source B CH1 CH4 Select CH1 CH2 CH3 or CH4 as Source B On Invert Invert the Math waveform Off Turn off Invert function Next Page Page 1 2 Enter the second page of MATH menu 4CH models only Setting z Use universal knob
50. e the cursor To do manual cursor measurements follow these steps L 2 3 4 Press CURSOR button to enter the cursor function menu Press the Cursor Mode option button to select Manual Press the Type option button to select Voltage or Time Press the Source option button to select CH1 CH2 CH3 CH4 MATH FFT REFA REFB REFC REFD according to input signal channel CH3 CH4 REFC and REFD available for 4CH models only Select Cur A and turn the Universal knob to adjust Cursor A Select Cur B and turn the Universal knob to adjust Cursor B The measurement values are displayed on the top left corner If the measurement type is set to Voltage the values are as follows The value of Cur A Cur A The value of Cur B Cur B The voltage difference between Cursor A and Cursor B AV If the measurement type is set to Time the values are as follows The value of Cur A Cur A The value of Cur B Cur B The time difference between Cursor A and Cursor B AT The reciprocal of time difference between Cursor A and Cursor B 1 AT 82 CURSOR AW 1 5 Mode ae 4 Manual LUFA Jabok Type Source CHI Cur A M Eins Figure 48 Cursor Menu Track Mode Table 34 Track Mode Function Menu Setting In this mode set track cursor measure Cursor A Set the input signal channel that the C
51. e the noise more clearly 4 Peak detect emphasizes noise spikes and glitches in your signal especially when the time base is set to a slow setting 136 Separating the Signal from Noise To reduce random noise in the oscilloscope display follow these steps 1 2 3 Press the ACQUIRE button to display the acquire menu Press the Acquisition option button or turn the Universal knob to select Average Press the Averages option button to see the effects of varying the number of running averages on the waveform display Averaging reduces random noise and makes it easier to see the details of a signal Triggering on a Video Signal Observe the video circuit in a piece of medical equipment and use the video trigger to obtain a stable display Triggering on Video Field To trigger on the video fields follow these steps 1 2 3 4 5 6 7 Press the TRIGGER MENU button to see trigger menu Press the top option button and select Video Press the source option button and select CH1 Press the Sync option button and select Odd Field or Even Field Press the Standard option button and select NTSC Turn the horizontal Time Div knob to see a complete field across the screen Turn the vertical Volts Div knob to ensure that the entire video signal is visible on the screen Triggering on Video Lines To trig
52. e width and period The amount one waveform leads or lags another in time Expressed in degrees where 360 degrees comprise one waveform cycle The time between the first rising edge of source and the first rising edge of source 2 The time between the first rising edge of source and the first falling edge of source 2 The time between the first falling edge of source and the first falling edge of source 2 The time between the first rising edge of source and the last rising edge of source 2 The time between the first rising edge of The time between the first falling edge of source and the last rising edge of source 2 The time between the first falling edge of source and the last falling edge of source 2 Wid Tu Duty Duy NNT Phase aL tL FRR Hl JH L FRF Serr The time between the first falling edge of FFR source and the first rising edge of source 2 SH LL FFF ree Tit L LRR HI JT LA LRF A Tit L LFR A J LA LFF If you want to measure voltage parameters please follow the steps below 1 Press the MEASURE button to enter the Auto measurement menu 91 Press the first option button to enter the second measurement menu Select measure type If you press the Voltage option button Voltage measurement menu will display on the screen Press the Source option button to select CH1 CH2 CH3 or CH4 according to input sig
53. een Save Recall Waveform Save Waveforms to Device Table 45 Save Waveform to Device Function Menu Selects Waveform for saving recalling Save to Device Save waveforms to the oscilloscope s internal memory Waveform No 1 to No 20 Press the Waveform option button or turn the Universal knob to select storage location pee one location Recall Recall the Waveform from the selected storage location in Waveform option 100 SAVERREC Type 4 Waveforms Save To Waveform Mo Save Fecall M Lens Figure 60 Save Waveform Menu Screen To save waveforms in internal memory follow the steps below 1 Input a sine signal to channel 1 and press the Auto button 2 Press the SAVE RECALL button to enter SAVE RECALL display menu 3 Press the Type option button to select Waveforms 4 Press the Save to option button to select Device 5 Press the Waveform option button or turn the Universal knob to select No 1 6 Turn the Volts div knob or Time div knob to adjust the waveform that you want 7 Press the Save option button To recall waveforms follow the steps below 1 Press the SAVE RECALL button to enter SAVE RECALL display menu 2 Press the Type option button to select Waveforms Press the Save to option button to select Device 4 Press the Waveform option b
54. el 2 or channel 4 Volts div and vertical POSITION set up the horizontal scale and position Turn the Time div knob to adjust the sampling rate The following functions are forbidden at XY display form Benchmark waveform and wave mathematics Cursor 79 Auto resets display format to YT Trigger Control Horizontal Position Knob Vector Display Type Scan Display Note When the display type is set to Vector the oscilloscope connects the sample points by using digital interpolation Interpolation mode contains linear interpolation and sin x x interpolation Sin x x interpolation is suitable for reconstructing curved or irregular wave shapes especially when the sample rate is 3 to 5 times the system bandwidth or at faster time base settings Measure System The oscilloscope displays the voltage in relation to time and tests the waveform displayed Different measurement techniques such as scale cursor and auto measure modes are used Scale Measurement This method allows you to make a quick visual estimate For example you might look at waveform amplitude and determine that it is a little more than 100 mV You can take simple measurements by counting the major and minor graticule divisions involved and multiplying by the scale factor For example if you counted five major vertical graticule divisions between minimum and maximum values of a waveform and knew you had a scale factor of 100 mV di
55. est all keys and knobs to verify that all the backlit buttons illuminate correctly Note e When you first enter the test the screen will display all on screen shapes in white color e Pressing any buttons on the front panel will cause its corresponding shape on the display to turn green if it is functioning normally e To exit the test at any time Press RUN STOP key three times to exit as indicated at the bottom of the screen 114 press RUMSSTOP key three times to exit Figure 70 Key Test Screen LED Test Select LED Test to test the LED backlights on some of the front panel buttons The screen will display key shapes that represent all the buttons of the front panel Follow the instruction prompt below and Press SINGLE Key to continue Press RUN STOP Key to exit Each time SINGLE key is pressed a key shape on the screen will turn green indicating that the corresponding key or indicator should be lid up Press SINGLE again to test another key backlight Once all the individual backlit keys are tested all of them will turn on simultaneously Pressing SINGLE key again will restart all over To Exit the test press RUN STOP key 115 To L ba Ko tJ eS a ic E Y E O O a io eo ee eee press SIMGLE key to continue Press AUNSSTOP key to exit Figure 71 LED Test Screen Updating Firmware Using USB flash drive to update firmwa
56. front and rear panel of the oscilloscope where you can save setup data waveform data waveform interface image and CSV file to a USB flash drive Setup data and waveform data that are saved to a USB flash drive can be recalled on the oscilloscope For picture data and CSV file a computer must be used to view them e Using SAVE RECALL Screen The SAVE RECALL screen is divided into functions based on Directories or Files Directories show option buttons for New Folder Del Folder and Load While File shows option buttons for New Folder Delete File and Load 93 BhP CHJ NASE ODE ono any SHSO0007 04 SIGLEM 1405 autorun int mm A Ei Es Ei Es Use the adjust knob to choose the file and folder oe F SO S000 A DAY SHoAAOO Cay SISLENM 1405 autorunint elena Use the adjust Knob to choose the file and folder Recalling Files 353 MB 0 Byte J OKB j 1 2 KB 249 KB 531KB Figure 53 Save All Menu Screen 1 ree 241 ME Figure 54 Save All Menu Screen 2 Modify Del Folder Mest Page Page T2 wiodify Del File Mest Fage Fage T2 The Load button is used to recall your setup files Once you have navigated to the desired file and it is highlighted in the main screen area press the Load option button and the setup is recalled from the USB flash drive Note The Load button option is disabled grayed out when BMP or CSV file types are selected 94 Both Direc
57. g waveform at 100 ms div or slower time base setting Normal Use this mode when you want to see only valid triggered waveforms When you use this mode the oscilloscope does not display a waveform until after the i firsttriggers O O oO O Single When you want the oscilloscope to acquire a single waveform press the SINGLE button Setup Enter the Trigger setup menu Page 2 2 Return to the Titel page of Video Trigger menu TRIGGER Type Video Standard Mode 4 Auto Set Lip Mext Page Page Ay TECIE Figure 33 Video Trigger Menu 2 Operating Instructions Set up Type 1 Press the TRIG MENU button to display Trigger menu 2 Press the Type option button to select Video Set up Polarity 1 Press the Polarity option button to select or Set up Synchronization 1 Press the Sync option button to select All Lines Line Num Odd Field and Even Field 2 If you select Line Num you can turn the Universal knob to set the appointed line number Set up Standard 1 Press the next Page Page2 2 option button 58 2 Press the Standard option button to select PAL SECAM or NTSC Slope Trigger Trigger on positive slope or negative slope according to setup time of the oscilloscope Table 20 Slope Trigger Function Menu 1 Setting Type Slope Trigger on p
58. g Signals Table 29 Acquiring Signals Function Menu Acquisition Sampling Use for sampling and accurately display most of the waveform Peak Detect Detect the noise and decrease the possibility of aliasing Average Use to reduce random or uncorrelated noise in the signal display Use sine interpolation Use linear interpolation Equ time Set the Sampling mode to Equivalent Real time time Set the Sampling mode to Real time 70 to Displays system sampling rate When you acquire a signal the oscilloscope converts it into digital form and displays a waveform The acquisition mode defines how the signal is digitized and the time base setting affects the time span and level of detail in the acquisition e Sampling In this acquisition mode the oscilloscope samples the signal in evenly spaced intervals to construct the waveform This mode accurately represents signals most of the time Advantage You can use this mode to reduce random noise Disadvantage This mode does not acquire rapid variations in the signal that may occur between samples This can result in aliasing which may cause narrow pulses to be missed In these cases you should use the Peak Detect mode to acquire data ACOUIRE Acquisition 4 Sampling Sinsi Sir Mode fa Rate 2000ta M eins Figure 39 Acquire Menu e Peak Detect Peak Detect mode capture the maximum and minimum values of a signal Finds highest and lowest record points
59. ger on the video lines follow these steps L 2 Press the TRIGGER MENU button to see the trigger menu Press the top option button and select Video 137 Press the Sync option button and select Line Num and turn the universal knob to set a specific line number Press the Standard option button and select NTSC Turn the Time Div knob to see a complete video line across the screen Turn the Volts Div knob to ensure that the entire video signal is visible on the screen Application of X Y Function Viewing Impedance Changes in a Network Connect the oscilloscope to monitor the input and output of the circuit To view the input and output of the circuit in an XY display follow these Steps L 2 K 10 11 12 Press the CH 1 MENU button and set the Probe option attenuation to 10X Press the CH 2 MENU button and set the Probe option attenuation to 10X Set the switch of the probe to 10X Connect the channel 1 probe to the input of the network and connect the channel 2 probe to the output Press the AUTO button Turn the Volts div knobs to display approximately the same amplitude signals on each channel Press the DISPLAY button Press the Format option button and select XY The oscilloscope displays a Lissajous pattern representing the input and output characteristics of the circuit Turn the Volts div and VERTICAL POSI
60. have signals the channel with the lowest frequency signal e No signals found the lowest numbered channel displayed when Auto set was invoked e No signals found and no channels displayed oscilloscope displays and uses channel 1 Table 2 Autoset Function Menu Items Acquire Mode Adjusted to Sampling Display Format Display Type Set to Dots for a video signal set to Vectors for an FFT spectrum otherwise unchanged Vertical Coupling Adjusted to DC or AC according to the input signal Bandwidth Limit Off full 25 adjustability Trigger source Auto detect the channel which has the input signal Note The AUTO button can be disabled Please see Appendix C Disabling Auto Function for details Default Setup The oscilloscope is set up for normal operation when it is shipped from the factory This is the default setup To recall this setup press the DEFAULT SETUP button For the default options buttons and controls when you press the DEFAULT SETUP button refer to Appendix A Default Setup The DEFAULT SETUP button does not reset the following settings Language option Saved reference waveform files Saved setup files Display contrast Calibration data 26 Universal Knob Figure 14 Universal Knob You can use the Universal knob with many functions such as adjusting the hold off time moving cursors setting the pulse width setting the video line adjusting the upper and lower frequency
61. ications all models Horizontal System Real Time 2 GSa s half channel interleaved Sampling 1 GSa s per channel Rate On 4 Ch models Chl and Ch2 are interleaved and Ch3 and Ch4 are interleaved Half channel operation means only Chl or Ch2 and or only Ch3 or Ch4 is active Highest Equivalent Sampling Rate Measure MAIN WINDOW WINDOW ZOOM ROLL X Y Display Modes Accuracy Scan Range 50 s div 50 s div Maximum 24 000 points Memory 12000 points for dual channel operation Length interleaved The number of data points depends on the timebase setting and whether or not the oscilloscope operates in single or dual channel mode More 146 details on the number of data points that can be saved to a CSV file can be found in the storage chapter of this manual The number of data points that can be captured via USB device interface using the EasyScope software is specified in the EasyScope manual Trigger System Edge Pulse Width Video Slope Alternate Types CH1 CH2 CH3 CH4 EXT EXT 5 AC Line Source Auto Normal Single Modes AC DC LF reject HF reject Coupling Trigger Level Range Trigger Level Accuracy typical applicable for the signal of rising and falling time gt 20ns Trigger Sensitivity Pulse Width Trigger Video Trigger CH1 CH2 CH3 CH4 6 divisions from center of screen EXT 1 2 V EXT 5 6 V Internal 0 2 div x V div within 4 divi
62. ing this option can turn the universal to set up the pulse width Next Page Page 2 2 Press this button to return to the first page 64 Table 25 Set Trigger Mode to Video Trigger Function Menu 1 CC Alternate The trigger signal comes from two vertical channels when you use alternatee trigger In this mode you can observe two unrelated signals at the same time Channels CHX CHY Select any two channels from CH1 CH2 CH3 or CH4 as the sources for alternating trigger CH1 CH2 Source CH3 CH4 Selects the source channel Mode Video Set trigger type of the vertical channel signal to Video trigger Page 1 2 Enter the second page of Alternate trigger menu Available for 4CH models only Table 26 Set Trigger Mode to Video Trigger Function Menu 2 Normal triggers on the negative edge of Normal the sync pulse 7 Inverted triggers on the positive edge of the sync pulse Polarity Inverted Sync All lines Select appropriate video sync Line Num Odd field Even Field 65 Standard NTSC Select the video standard for sync and Pal Secam line number count Set up BY Enter the Trigger Setup Menu Next Page Page 2 2 the second page of Alternatetrigger Table 27 Set Trigger Mode to Slope Trigger Function Menu 1 Type Alternative The trigger signal comes from two vertical channels when you use alternative trigger In this mode you can observe
63. ious menu OTILITY Screen saver Tmin Fecorder DateTime Quick Cal Mext Page M Teens ar 2000 2099 Set the current display year using the universal knob Set the current display month and day using Monay es the universal knob Hour Minute 00 00 Set the current display hour and minute using the universal knob Displa ON Turn on date time display information play OFF Turn off date time display information Confirm ae Press this to confirm the settings 110 System Status Press the System Status option button of the Utility Menu to view the oscilloscope s hardware and software configuration startup lines 51 Software Version Hardware Version 5 0 1 25 Product Type Serial Mo 1020 1062 6003 00 press SINGLE key to exit Figure 66 System Status Info Screen Table 53 System Status Information Startup Times Times Lists the number of Lists the number of startup times times iets hic Version Lists a software version Hardware Version Lists the hardware version Product Type Lists the product model Lists the product serial number Language Menu items can be displayed in 12 different languages selectable by the user Press the UTILITY button and then select Language 111 UTILITY Systeme Sor compteur Bratch Tr Language English Fran ais Page Sui M 1 0ns Figure 67 Language Selection Screen Self Calibration Self
64. ition of Cursor B Time cursor centered around the midpoint of the screen B V The vertical position of Cursor B Voltage cursor centered around the channel ground level AT Horizontal space between Cursor A and Cursor B Time value between two cursors 1 AT The reciprocal of horizontal space between cursor A and cursor B AV Vertical space between Cursor A and Cursor B Voltage value between two cursors 84 CURSOR Mode Track Cursor A CH1 Cursor B CH1 CUr Curb 34 8ns Figure 49 Cursor Menu Auto Mode Table 35 Auto Mode Function Menu Setting Cursor Auto Set to auto cursor Mode measure mode This mode will take effect with automatic measurements The instruments will display cursors while measuring parameters automatically To do auto cursor measurements follow these steps 1 Press the CURSOR button to enter Cursor measure menu 2 Press the Cursor Mode option button to select Auto Press the MEASURE button to enter Auto cursor measure mode menu to select the parameter that you want to measure 85 MEASURE oOUce CH1 Type Wa Figure 50 Auto Mode Auto Measurement When you take automatic measurements the oscilloscope does all the calculation for you The measurements use all the recorded points in the memory which are more accurate than measurements made using the graticule lines or cursor measurements because these measurements are
65. itude accuracy than narrow band random Rectangular Hamming has noise Asymmetric slightly better frequency transients or bursts resolution than Hanning Blackman Best magnitude worst Single frequency frequency resolution waveforms to find higher order harmonics Magnifying the FFT Spectrum You can magnify and use cursors to take measurements on the FFT spectrum The oscilloscope includes an FFT Zoom option to magnify horizontally press this option button to select 1X 2X SX or 10X Moreover you also can turn the Universal knob to magnify FFT waveform horizontally in a 1 2 5 step To magnify vertically turn the V olts div knob Measuring an FFT Spectrum Using Cursors You can take two measurements on FFT spectrums magnitude in dB and frequency in Hz Magnitude is referenced to 0 dB where 0 dB equals 1 Vrms You can use the cursors to take measurements at any zoom factor Use horizontal cursors to measure amplitude and vertical cursors to measure frequency If you input a sine signal to channel 1 follow these steps 1 Measure FFT Amplitude 1 Input a sine signal to channel 1 and press the AUTO button Press the MATH button to enter the MATH menu Press the Operation option button to select FFT Press the Source option button to select CH1 Press CH1 button to display CH1 menu Turn the Time div knob to adjust sampling rate at
66. l USB Type A to B communication cable AC Power Cord Four 10 1 passive oscilloscope probes for 4 channel models two probes for 2 channel models Certificate of Calibration Please locate each item from the original packaging and contact B amp K Precision immediately if something is missing Checking Functions Please follow the steps below when checking the oscilloscope s functionality L Power on the oscilloscope Press DEFAULT SETUP to set to factory default settings The probe default attenuation is 1X 15 Figure 6 Scope Layout 2 Set the switch to 1X on the probe and connect the probe to channel 1 on the oscilloscope To do this align the slot in the probe connector with the key on the CH 1 BNC push to connect and twist to the right to lock the probe in place Connect the probe tip and reference lead to the PROBE COMP connectors PROBE COMP Figure 7 Probe Compensation 3 Press AUTO to show the 1 kHz frequency and about 3V peak peak square wave in couple seconds 16 Figure 8 3Vpp Square Wave 4 Press CH1 two times to cancel the channel 1 Press CH2 to change screen into channel 2 reset the channel 2 as step 2 and step 3 Do the same for 4CH models by pressing CH3 and CH4 for channel 3 and channel 4 respectively Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock Figure 9 Probe
67. least double bigger than frequency of input signal Nk a a 42 7 If FFT display on full screen press CH1 button again to remove channel waveform display 8 Press the CURSOR button to enter Cursor menu 9 Press the Cursor Mode button to select Manual 10 Press the Type option button to select Voltage 11 Press the Source option button to select FFT 12 Press the CurA option button and turn the Universal knob to move Cursor A to the highest point of the FFT waveform 13 Press the CurB option button turn the Universal knob to move Cursor B to the lowest point of the FFT waveform 14 The amplitude AV displays on the top of the left screen CURSOR Mode 4 Manual Type Source MATH AU 4 4HHdBL Curb 88 6dBl F S6 edB Cur A Cur a DEEE Figure 25 Measuring FFT Amplitude 2 Measure FFT Frequency Press the CURSOR button Press the Cursor Mode button to select Manual Press the Type option button to select Time Press the Source option button to select FFT Press the CurA option button and turn the Universal knob to move Cursor A to the highest position of the FFT waveform 6 The value of CurA displaying on the top of the left screen is the highest Frequency This frequency should be the same as input signal frequency ee 43 CURSOR Mode 4 Manual Type Source
68. limit and adjusting X and Y masks when using the pass fail function You can also turn the Universal knob to adjust the storage position of setups waveforms pictures when saving recalling and to select menu options With some functions the light indicator above the knob will turn on to indicate that the knob can be used to make changes or adjustments for that function The knob can also be pushed to make a selection after changes adjustments have been made 27 Vertical System The vertical control could be used for displaying waveform rectify scale and position Figure 15 Vertical System Controls 28 Channel Function Menu Table 3 Channel Function Menu Setting Description D A Coupling C DC passes both AC and DC components of the input signal C AC blocks the DC component of the input signal and attenuates signals below 10 Hz GND GND disconnects the input signal BW Limit Off On Disables bandwidth limit Enables bandwidth limit Volts Div Selects the resolution of the Volts Div knob Coarse defines a 1 2 5 sequence Fine changes the resolution to small steps between the coarse settings Probe Set to match the type of probe you are using to ensure correct vertical readouts Next Page Page 1 3 Press this button to enter second page menu Table 4 Channel Function Menu 2 Invert On Turn on invert function Off Turn off invert function Input 1M Set input impedance to 1MQ 50Q Set input impedance
69. lternative trigger In this mode you can observe two irrelative signals at the same time Select any two channels from CH1 CH2 Channels CHX CHY CH3 or CH4 as the sources for alternating trigger Source Selects the source channel Mode Edge Set trigger type of the vertical channel signal to Edge Page 1 2 Yi i the second page of the TRIGGER Available for 4CH models only Setting Triggering on rising edge Slope Triggering on falling edge TL Triggering on rising edge and falling edge SetUp __ Enter the Trigger setup menu Page 2 2 Go back to the first page of the TRIGGER menu 63 Table 23 Set Trigger Mode to Pulse Trigger Function Menu 1 Type The trigger signal comes from two Aitemate vertical channels when you use alternative trigger In this mode you can observe two irrelative signals at the same time Channels CHX CHY Select any two channels from CH1 CH2 CH3 or CH4 as the sources for alternating trigger CH1 CH2 Source CH3 CH4 Selects the source channel Set trigger type of the vertical Mode Pulse channel signal selected by Source to Pulse trigger Enter the second page of we NextPage mage Nie Alternative trigger menu Available for 4CH models only Table 24 Set Trigger Mode to Pulse Trigger Function Menu 2 Select how to compare the trigger pulse relative to the value selected in the Set Pulse Width option Set Width 20 0 ns 10 0 s Select
70. n button to set Recorder options Press the Record button to enter the Record menu and then press Start button to start recording waveform After finished recording waveform then Press the Replay button to view the recorded waveform Help Menu The oscilloscope has help menu to assist users with operating the oscilloscope Press the HELP button to enter the help status and then press any button to recall the corresponding help information All submenus of every main menu have their help information Note If you want to see help information of the next page submenus first press the HELP button to exit the help status Then switch to the next page menu and press the HELP button again to enter the help function 129 Fa UTLITY Status Pt H mM 5 cound button simply press the button To exit the online help press the HELF button Counter f DF Language English Next Page 130 Chapter 3 Remote Control The 2550 series digital storage oscilloscope comes with Easyscope application software which provides most of the controls that emulate the front panel of the instrument The rear panel USB device port is used to connect to a computer to allow for remote communication with the software The Easyscope software is free and can be downloaded at www bkprecision com Remote communication commands are also supported via both the USB device interface and the LAN interface
71. nal channel CH3 and CH4 available for 4CH models only Press the Type option button to select the parameter type that you want to measure The corresponding icon and value will display below the measure parameter Press the Return option button to return to the home page of the Auto Measurement menu The selected parameter and the corresponding value will display on the top position of the home page You can display the other parameters and its value on the corresponding position in the same way The screen can display up to five parameters at one time If you want to measure time parameters using all measure function please follow these steps L 2 Par Press the MEASURE button to enter the Auto Measure menu Press the top option button to enter the second page of Auto Measure menu Press All Mea option button to enter the All Measure menu Press Source option button to select input signal channel Press the Time option button to select On Now all of the time parameters values will display on the screen at the same tme 92 MEASURE Source Voltage Time M 18 0ns Figure 52 Measuring Time Parameters Storage System Shown below the SAVE RECALL button enters the Storage System Function Menu The scope can save and recall up to 20 instrument settings and 20 waveforms to its internal memory There is a USB host port on the
72. ness Setup Display Format 1 Press the Next Page option button to enter second display menu 2 Press the Format option button to select YT or oy Setup Screen Press the Screen option button to select Normal or Inverted to set the screen display color 78 Setup Grid Press the Grid option button to select a FH ors Ll to set the screen whether to display grid or not Setup Menu Display Press the Menu Display option button to select 2 sec 5 sec 10 sec 20 sec or Infinite to set menu display time on screen Set Skin Press the skin option button or turn the Universal knob to select Classical Modern Traditional or Succinct X Y Format Use the XY format to analyze phase differences such as those represented by Lissajous patterns The format plots the voltage on channel 1 against the voltage on channel 2 where channel 1 is the horizontal axis and channel 2 is the vertical axis The oscilloscope uses the untriggered Sample acquisition mode and displays data as dots Note The oscilloscope can capture a waveform in normal YT mode at any sampling rate You can view the same waveform in XY mode To do so stop the acquisition and change the display format to XY Operation steps Channel 1 or channel 3 Volts div and vertical POSITION set up the horizontal scale and position Chann
73. ns dark Please do the following 1 Check the power cable s connection 2 Ensure the power switch is turned on 3 After the inspections above restart the oscilloscope 4 Ifthe oscilloscope is still not useable after checking please contact B amp K Precision 2 If there is no signal wave in the screen after probing DUT for a signal please do as follows 1 Check whether the probe is connecting with the signal cable or not 2 Check whether the signal cable is connected with the BNC connector or not 3 Check the probe whether it s connected with the device under test DUT or not 4 Check the tested DUT to see if it produces the signal or not 5 Try to probe the DUT for signal again 3 If the value of the tested voltage is 10 times higher or lower than actual please do the following Check the attenuation quotient whether it matches the probe attenuation proportion or not 4 If waveform display is not stable please do the following 1 Check the signal source on the trigger interface whether or not it matches the signal channel 2 Check the trigger mode normal signal should use the 142 edge trigger mode The video signal should use the Video Trigger mode The signal would display steadily only when using matching trigger mode 3 Attempt to change the coupling into HF Reject or LF Reject display so that the High low frequency noise will be filtered When pressing RUN STOP button
74. ntal POSITION knob 1 Adjust the horizontal position of all channels and math waveforms the position of the trigger relative to the center of the screen The resolution of this control varies with the time base setting 2 When you press the horizontal POSITION Knob you can set the horizontal position to zero e Time div knob 47 1 Used to change the horizontal time scale to magnify or compress the waveform If waveform acquisition is stopped using the RUN STOP or SINGLE button turn the Time div knob to expand or compress the waveform 2 Select the horizontal Time div scale factor for the main or the window time base When Window Zone is enabled it changes the width of the window zone by changing the window time base e Display scan mode When the Time div control is set tol00 ms div or slower and the trigger mode is set to Auto the oscilloscope enters the scan acquisition mode In this mode the waveform display updates from left to right There is no trigger or horizontal position control of waveforms during scan mode Window Zone Use the Window Zone option to define a segment of a waveform to see more detail This function behaves like zooming into a portion of the captured waveform The window time base setting cannot be set slower than the Main time base setting You can turn the Horizontal Position and Time div controls to enlarge or minimize waveforms in the Window Zone If you want to see a
75. ositive slope or negative slope according to setup time of the oscilloscope Select trigger source Select trigger condition Time Turn the Universal knob to set lt Set Time gt slope time Time setup range is 20ns 10s trigger menu Available for 4CH models only 59 TRIGGER Type Source H wher AF Time 1 Bem Mext Page Page T2 DEEE Figure 34 Slope Trigger Menu Table 21 Slope Trigger Function Menu 2 Setting Type Slope Trigger on positive slope or negative slope according to setup time of the oscilloscope Vertical Select the trigger level that can be adjusted by LEVEL knob You can adjust LEVEL A LEVEL B or adjust them at the same time Use this mode to let the acquisition free run in the absence of a valid trigger This mode allows an untriggered scanning waveform at 100 ms div or slower time base setting Use this mode when you want to see only valid triggered waveforms When Normal you use this mode the oscilloscope does not display a waveform until after the first trigger When you want the oscilloscope to Single acquire a single waveform press the SINGLE button Setup Enter the Trigger setup menu Page 2 2 a to the first page of slope trigger TRIGGER Type Mode Auto Set Lip Mext Page Page 22 M 258s S H5 A7 14d Figure 35 Slope Trigger Menu 2 Operating Instructions Follow next steps if you sele
76. over many acquisitions Advantage In this way the oscilloscope can acquire and display narrow pulses which may have otherwise been missed in Sample mode Disadvantage Noise will appear to be higher in this mode 7 ADQUIRE Acquisition Peak Detect SINK Sin Mlode Real Time Ga Rate 2 500NISa Figure 40 Peak Detect e Average The oscilloscope acquires several waveforms averages them and displays the resulting waveform Advantage You can use this mode to reduce random noise ACOUIRE Acquisition Average Mode Sa Rate 200065a Figure 41 Acquisition Averaging Screen e Equivalent Time Sampling The equivalent time sampling mode can achieve up to 50 GSa s This mode is useful for observing repetitive waveforms e Real Time Sampling The oscilloscope s maximum real time sampling rate is 2 GSa s 72 RUN STOP Button Press the RUN STOP button when you want the oscilloscope to acquire waveforms continuously Press the button again to stop the acquisition SINGLE Button Press the SINGLE button to acquire a single waveform Each time you push the SINGLE button the oscilloscope begins to acquire another waveform After the oscilloscope detects a trigger it completes the acquisition and Stops When you push the RUN STOP or SINGLE buttons to start an acquisition the oscilloscope goes through the following steps 1 Acquire enough data to fill the portion of the waveform record
77. p will without charge repair or replace at its option defective product or component parts Returned product must be accompanied by proof of the purchase date in the form of a sales receipt To obtain warranty coverage in the U S A this product must be registered by completing a warranty registration form on our website www bkprecision com within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs The warranty is void if the serial number is altered defaced or removed B amp K Precision Corp shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitations of incidental or consequential damages So the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other rights which vary from state to state B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 158 EACAN B dhh d A BK 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2012 B amp K Precision Corp Printed in China V110612
78. pulse width setting gt Positive pulse width equal to pulse width setting i Negative pulse width less than pulse width setting lt gt Negative pulse width larger than pulse width setting CEM pulse width equal to pulse width setting Set Width 20 0 ns 10 0 s Select to set up pulse width Next Page Page 1 2 Press this button to enter the second page Available for 4CH models only TRIGGER AT 486 8 ps Type 1 47 2 58KHz Pulse ed ps Cura 206 80ps Source CH2 when FEA Set width 1 Beams Next Page Page T2 M 25 0 ps Figure 30 Pulse Trigger Menu Screen 54 Table 17 Pulse Trigger Function Menu 2 Setting Type Pulse Select the pulse to trigger the pulse matching the trigger condition Mode Auto Select the type of triggering Normal Normal mode is best for most Pulse Width single trigger applications o ee Enter the Trigger setup menu Page 2 2 Press this button to return to the first page TRIAGER AT 400 8ps Type 1 fAT 2 58KHZ Pulse Curb 266 8ps CUrA 200 0 ps iode 4 Auto Set Lp Next Page Page Ay M 25 8ps Figure 31 Pulse Trigger Menu 2 Operating Instructions 1 Set up Type Press the TRIG MENU button to display Trigger menu Press the Type option button to select Pulse 2 Set up condition Press the When option button to select aad a iat 99 66 E gt 99 coal oo
79. r OFF and open the Channel menu for that channel You can use the channel menu to set up a channel When the channel is ON the channel button is lit MATH Press to display the Math menu You can use the MATH menu to use the oscilloscope s Math functions REF Press to display the Ref Wave menu You can use this menu to save and recall reference waveforms to and from internal memory 21 HORI MENU Press to display the Horizontal menu You can use the Horizontal menu to display the waveform and to zoom a segment of a waveform TRIG MENU Press to display the Trigger menu You can use the Trigger menu to set the trigger type Edge Pulse Video Slope Alternate and trigger settings SET TO 50 Press to stabilize a waveform quickly The oscilloscope can set the trigger level to be halfway between the minimum and maximum voltage level automatically This is useful when you connect a signal to the EXT TRIG connector and set the trigger source to Ext or Ext 5 FORCE Use the FORCE button to complete the current waveform acquisition whether the oscilloscope detects a trigger or not This is useful for Single acquisitions and Normal trigger mode SAVE RECALL Press to display the Save Recall menu You can use the Save Recall menu to save and recall up to 20 oscilloscope setups and 20 waveforms to from internal memory or a USB memory device limited by memory capacity of USB device You can also use it to recall the default factory settings
80. re The firmware of the oscilloscope can be updated directly via a USB Flash drive This process takes about two minutes To update follow the steps below 1 2 3 6 cf Download and save the firmware file onto a USB flash drive Insert the USB Flash Drive to the USB Host interface on the front panel of the oscilloscope Press the UTILITY button to enter the Utility menu Press the Next Page option button to enter the third page of the Utility menu Press the Update Firmware option button Read the on screen notes carefully before proceeding Press the SINGLE button to enter into the directory menu of the USB flash drive Use the universal knob to select the firmware file on the USB flash drive and select Confirm to start the update When completed turn off the oscilloscope and turn on again The software will then be updated The oscilloscope will require self calibration after the update Go into the utility menu s second page and select Do Self Cal to run self calibration 116 WARNING Do NOT turn off the power while the oscilloscope is updating Otherwise the firmware will be corrupted and the instrument may not be able to reboot again Pass Fail The Pass Fail function can monitor changes of signals and output pass or fail signals by monitoring the input signal and checking if it is within the predefined mask or not Table 55 Pass Fail Function Menu 1 Se
81. rigger signal TL Trigger on Rising edge and Falling edge of the trigger signal Mode Auto Use this mode to let the acquisition free run in the absence of a valid trigger This mode scans waveform at 100 ms div or slower time base settings Normal Use this mode when you want to see only valid triggered waveforms when you use this mode the oscilloscope does not display a waveform until after the first trigger Single When you want the oscilloscope to acquire a single capture of a waveform press the SINGLE button Set up Enter the Trigger Setup Menu See below table Available for 4CH models only Table 15 Trigger Setup Function Menu Coupling Passes all components of the signal 51 Blocks DC components attenuates signals below 25 Hz Attenuates the a ee frequency components above HF Reject 1 a ee 0 kHz iF Reiwct Blocks the DC component attenuates the low frequency components below 8 kHz Holdoff Using the universal knob to adjust holdoff time a sec the holdoff value is displayed Holdoff Reset holdoff time to 100 ns Reset Return to the first page of Trigger main menu TRIGGER AT 4 6ams Type 1 A7 258 8Hz Edge Curb 2 6em Cura 2 68ms Source CHI Mlode Auto DEEE Figure 29 Trigger Menu Screen Operating Instructions 1 Set up Type Press the TRIG MENU button to display Trigger menu Press the Type option button to
82. section of the waveform in details follow these steps 1 Press the HORI MENU button to enter the Horizontal menu 2 Turn the Time div knob to change the main timebase scale 3 Press the Delayed option button to select On 48 HORIZON Delayed LW Pos Bap M SSB ps DESENE Figure 28 Horizontal Delay Menu 4 Turn the Horizontal Position knob adjust window s position to select the window that you need and expanded window waveform display will show on the below half of the screen at the same time Trigger System The trigger determines when the oscilloscope starts to acquire data and display a waveform When a trigger is set up properly the oscilloscope converts unstable displays or blank screens into meaningful waveforms Here are three buttons and one knob in the trigger area See below e TRIG MENU Button Press the TRIG MENU Button to display the Trigger Menu e LEVEL Knob The LEVEL knob is to set the corresponding signal voltage of trigger point in order to sample Press the LEVEL knob to set trigger level to zero e SET TO 50 Button Use the SET TO 50 button to stabilize a waveform quickly The oscilloscope can set the Trigger Level to be about halfway between the minimum and maximum voltage levels automatically This is useful when you connect a 49 signal to the EXT TRIG BNC and set the trigger source to Ext or Ext 5 e
83. select Edge 2 Set up Source According to the input signal press the Source option button to select CH1 CH2 CH3 CHP EXT EXT 5 or AC Line CH3 and CH4 available for 4CH models only 3 Set up Slope 52 Press the Slope option button to select ee ke or t4 a 4 Set up Trigger mode Press the Trigger mode option button to select Auto Normal Single Auto The waveform refreshes at a high speed whether the trigger condition is satisfied or not Normal The waveform refreshes when the trigger condition is satisfied and waits for next trigger event occurring when the trigger condition is not satisfied Single The oscilloscope acquires a waveform when the trigger condition is satisfied and then stops 5 Set up Trigger coupling e Press the Set up button to enter the Trigger Setup Menu e Press the Coupling option button to select DC AC HF Reject or LF Reject Pulse Trigger Use Pulse Width triggering to trigger on aberrant pulses Table 16 Pulse trigger Function Menu 1 Type Pulse Select the pulse to trigger the pulse matching the trigger condition Source Select input signal source 53 4e Select how to compare Positive pulse width less than the trigger pulse relative pulse width setting to the value selected in i the Set Pulse Width Positive pulse width larger option than
84. sions from center of screen EXT 6 of setting 40 mV EXTY5 6 of setting 200 mV For fixed gain ranges 1 Divisions DC 10 MHz 1 5 Divisions 10 MHz Ma x BW EXT 200 mVpp DC 10 MHz 300 mVpp 10 MHz Ma x BW EXT 5 1 Vpp DC 10 MHz 1 5 Vpp 10 MHz Max BW Trigger Modes gt lt positive Pulse Width gt lt Negative Pulse Width Pulse width range 20 ns 10 s Support signal formats PAL SECAM NTSC Trigger condition odd field even field all lines line Num 147 Alternate Trigger Display System Display Mode Color TFT 7 0 in 177 8 mm diagonal Liquid Crystal Display 480 horizontal by 234 vertical Pixels Display Color 64K color Display 150 1 Contrast Typical state Backlight 300 nit Intensity Typical state range Mode Persist Off 1 sec 2 sec 5 sec Infinite Menu Display 2 sec 5 sec 10 sec 20 sec Infinite Screen Saver Off 1 min 2 min 5 min 10 min 15 min 30 min 1 hour 2 hour 5 hour Waveform Sin x x Linear interpolation Color model Language English Arabic French German Russian Spanish Portuguese Japanese Korean Italian Simplified Chinese Traditional Chinese X Y Mode X pole Input CH1 CH2 or CH3 CH4 Y Pole Input 148 Hardware Frequency Counter Reading resolution 6 digits Accuracy 0 01 Range DC Couple 10 Hz to Max BW Signal Types Satisfying all trigger signals except pulse width trigger
85. splay FFT waveform on half screen play Full screen Display FFT waveform on full screen Page 2 2 Return to the first page of FFT menu To use the Math FFT mode you need to perform the following tasks 1 Set up the source time domain waveform 2 Press the AUTO button to display a YT waveform F Turn the vertical POSITION knob to move the YT waveform to the center vertically zero divisions 4 Turn the horizontal POSITION knob to position the part of the YT waveform that you want to analyze in the center eight divisions of the screen 39 5 The oscilloscope calculates the FFT spectrum using the center 1024 points of the time domain waveform 6 Turn the Volts div knob to ensure that the entire waveform remains on the screen a Turn the Time div knob to provide the resolution you want in the FFT spectrum 8 If possible set the oscilloscope to display many signal cycles To display FFT correctly follow these steps 1 Push the MATH button 2 Set the Operation option to FFT 3 Press the Source button to select CH1 CH2 CH3 or CH4 according to input signal channel CH3 and CH4 available for 4CH models only 4 According to Nyquist law turn the Time div knob to adjust the sampling rate this parameter is displayed behind the time base parameter making sure it is at least double the input signal frequency Displaying the FFT Spectrum
86. ss the SINGLE button when you want the oscilloscope to acquire a single waveform e Trigger coupling affects only the signal passed to the trigger system It does not affect the bandwidth or coupling of the signal displayed on the screen Normal Polarity Sync triggers always occur on negative going horizontal sync pulses If the video waveform has positive going horizontal sync pulses use the Inverted Polarity selection Trigger Holdoff You can use the Trigger Holdoff function to produce a stable display of complex waveforms Holdoff is time between when the oscilloscope detects one trigger and when it is ready to detect another The oscilloscope will not trigger during the holdoff time For a pulse train you can adjust the holdoff time so the oscilloscope triggers only on the first pulse in the train Trigger position eee as ae ae Fa ele Tigger level Holdoff time Figure 38 Trigger Holdoff If you want to change holdoff time please follow the steps below 1 Press the TRIG MENU button to show the TRIG Menu pA Press the Type option button to select trigger type 2 Press the Set Up option button to enter the 69 Trigger setup menu 4 Press the Holdoff option button and turn the Universal knob to change the holdoff time until the waveform triggers steadily Signal Acquisition System Shown below is the ACQUIRE button for entering the menu for Acquirin
87. ted municipal waste Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements z This symbol is used to denote the measurement ground connection y This symbol on an instrument indicates caution For details the user should refer to the operating instructions in the manual A N Electrical Shock hazard CAT 400V NOTES On Power This is the In position of the power switch when instrument is ON Off Power This is the Out position of the power switch when instrument is OFF This symbol shows that the switch is a power switch located at the top of the oscilloscope Pressing this button toggles the oscilloscope s state between operation and power off mode IEC Measurement Category I Inputs may be connected to mains up to 400 VAC under Category overvoltage conditions All references and functionality related to CH3 channel 3 and CH4 channel 4 in this manual are available on 4CH models 2553 2555 2557 and 2559 They are not available for 2CH models 2556 and 2558 Table of Contents SAFETY SUMMARY orria aN ba asiaiaaeeinesaseuianwen es 3 CHAPTER 1 INTRODUCTION ccecceccsccsccscescescescescescescescees 10 PANEL AND DISPLAY INFORMATION 3 0 c0sccscnevessceveevevscostsscdecessaesescne 11 ETON EG POU E PAAA sen uate esata nee E S A AT 11 BOC PP CII rarnana vans eoiteaas sasesienteeudog erie A whites 12
88. the nearest peak of the ring You can see the delta time and frequency the measured ring frequency on the top left of the screen CURSOR Mode Type Source Figure 83 Cursor Menu Screen 1 134 Measuring Ring Amplitude To measure the amplitude follow these steps Press the CURSORS button to see the Cursor Menu Press the Mode button to select Manual Press the Type option button and select Voltage Press the Source option button and select CH1 Press the CurA option button and turn the universal knob to place the cursor A on the highest peak of the ring 6 Press the CurB option button and turn the universal knob to place the cursor B on the lowest peak of the ring You can see the following measurements on the top of the left screen The delta voltage peak to peak voltage of the ringing The voltage at Cursor A e The voltage at Cursor B ee CORSOR AWl 2 64kl Mode MEERN TETE Eee 1 e Manual Type Source Figure 84 Cursor Menu Screen 2 Capturing a single event To capture a single event you need to gather some knowledge of the signal in order to correctly set up the trigger level and slope If you are not sure about the instance of the signal you can observe it through auto or normal trigger mode to ensure the trigger level and slope will capture the signal 135 The following steps show you how to use the oscilloscope to captur
89. this button to enter second page 107 UTILITY System Status Sound che Counter Language 4 English Met Page Page T4 URIASE Figure 64 Utility Menu Screen 1 v AS Ar m A AA Table 50 Utility System Function Menu 2 Do Self Cal a Auto self calibration Do Self Test Screen Test Run the screen test program Keyboard Test Run the keyboard test program LED Test Run the LED test program USBTMC Configures the USB port to Back USB USBTMC interface Use this for remote communication via SCPI Page 2 4 Press this button to enter third page 108 o Self Cal D Self Test etu Back WISH Next Fage Fage 4 UTLIT D D Y a M Eins Figure 65 Utility Menu Screen 2 2 AS AF 157A a Table 51 Utility System Function Menu 3 Update Update the firmware of the oscilloscope firmware using a USB flash Drive Pass Fail Pres this button to enter the Pass Fail menu hea cil Press this button to enter the waveform record menu IP Setting menu Currently not used Press this button to enter the IP Setting Page 3 4 Press this button to enter first page Table 52 Utility System Function Menu 4 Screen saver Imin 2min Sets the timer of the screensaver 5min 10min 15min 30min lhour 2hour Shour Off 109 Recorder Record Goes into the recorder menu to start waveform record Date Time Sets the date and time on the calibration Return Returns to prev
90. to 50 Q 29 Filter Press this button to enter the Digital Filter menu Page 2 3 Press this button to enter the third page menu Table 5 Channel Function Menu 3 Unit Set the scale unit to voltage Set the scale unit to current Skew O 100 ns ns Set the skew time between two channels ten ae Press this button to return the first page menu Table 6 Digital Function Menu 30 On Off oie Lo Be Upp_limit be Turn the Universal knob to set upper limit Low limit Turn the Universal knob to set lower limit Reun Return to digital filter main menu e GND Coupling Use GND coupling to display a zero volt waveform Internally the channel input is connected to a zero volt reference level e Fine Resolution The vertical scale readout displays the actual Volts Div setting while in the fine resolution setting Changing the setting to coarse does not change the vertical scale until the VOLTS DIV control is adjusted Turn on the digital filter Turn off the digital filter Setup as LPF Low Pass Filter Setup as HPF High Pass Filter Setup as BPF Band Pass Filter Setup as BRF Band Reject Filter The oscilloscope s vertical response rolls off slowly above its specified bandwidth Therefore the FFT spectrum can show valid frequency information higher than the oscilloscope s bandwidth However the magnitude information near or a
91. to save waveform data as a comma delimited file CSV and to save the displayed waveform image ACQUIRE Press to display Acquire menu You can use the Acquire menu to set the acquisition Sampling Mode Sampling Peak Detect Average MEASURE Press to display a menu of measurement parameters CURSORS Display the Cursor Menu Vertical Position controls adjust cursor position while displaying the Cursor Menu and the cursors are activated Cursors remain displayed unless the Type option is set to Off after leaving the Cursor Menu but are not adjustable DISPLAY Press to open the Display menu You can use the Display menu to set grid and waveform display styles and persistence 22 UTILITY Press to open the Utility menu You can use the Utility menu to configure oscilloscope features such as sound language counter etc You can also view system status and update software DEFAULT SETUP Press to reset the oscilloscope s settings to the default factory configuration HELP Enter the online help system AUTO Automatically sets the oscilloscope controls to produce a usable display of the input signals RUN STOP Continuously acquires waveforms or stops the acquisition Note If waveform acquisition is stopped using the RUN STOP or SINGLE button the TIME DIV control expands or compresses the waveform SINGLE Acquire a single waveform and then stops Connectors Figure 12 Connectors Channel Connector
92. tory and Files have Rename and Return option buttons on Page2 2 Use these buttons to give an existing folder or file a new name or to exit the SAVE RECALL screen respectively Rename CHJ RECYC go2 LERE SIGLEN 1ADS autorun inf E i B Mest Fage Page 2 Use the adjust knob to choose the file and folder Figure 55 Rename Screen Creating Folders and Files Create new folders and files by pressing the New Folder or New File option button The following screen is shown Input har Mame SoSoo00 DEFGHIJELKI 1 eee YF Use the adjust knob to select characters Figure 56 Input Characters Screen 95 e The New File menu options are the same as the New Folder menu The InputChar option button adds the selected character to the cursor position in Name field e Move the cursor position in the name field using the gt and lt option buttons e Turn the Universal knob to move through character selections When the desired character is highlighted press the Universal knob or press the InputChar option button to add it to the specific position in the Name field e Additional selections for BackSpace DeleteCharacter and CleanName are available for convenience and are also accessible using the Universal knob in the same manner e Press the Confirm option button when you have the Name field completed as desired to save the file onto the memory device
93. trols Time div horizontal position Horizontal menu 13 Auto set button 14 Trigger Controls Trigger menu Set to 50 Force Trigger level 15 External trigger BNC 16 2CH 4CH BNC inputs 17 Vertical Controls Volts div vertical position CH1 amp CH2 or CH1 CH2 CH3 CH4 On Off Math function Reference function Back Panel The following shows the back panel connections of the DSO Rubber feet Kensington security slot Pass Fail BNC output LAN interface USB device port for remote communication Rear USB host port for storage to USB flash drives Main AC power switch Input fuse holder So OHNADAAAR WY gt AC line input 10 Carrying handle Display Information 1 2 3 4 5 CHI Coupling D E Limit On volts Di Frohe TH Mest Page 8 910 11 12 16 13 14 15 Figure 5 Display Screen 1 Trigger status e Armed The oscilloscope is acquiring pre trigger data All triggers are ignored in this state e Ready All pre trigger data has been acquired and the oscilloscope is ready to accept a trigger 13 10 11 12 e Trig d The oscilloscope has seen a trigger and is acquiring the post trigger data e Stop The oscilloscope has stopped acquiring waveform data e Auto The oscilloscope is in auto mode and is acquiring waveforms in the absence of triggers e Scan The oscilloscope is acquiring and displaying waveform data continuously in scan mode This mode occurs when os
94. tting Enable On Turn on Pass Fail function Off Turn off Pass Fail function Source CHI Select signal input channel CH2 CH3 CH4 per e Press to run the Pass Fail test Press to stop the Pass Fail test On Turn on display information of the Msg Display Off waveform pass fail times Turn off display information of the waveform pass fail times Next Page Page 1 2 Press this button to enter the second page of Pass Fail menu 117 PASS FAIL Enable Test Source CH1 Operate Mext Page Page T2 M Lens Figure 72 Pass Fail Screen 1 Table 56 Pass Fail Function Menu 2 Output Pass Output signal when pass Fail condition is detected Output signal when fail condition is detected Stop On Output On When On it stops the test when Off an output occurs When Off it continues to test when an output occurs baaa a Decal Press this button to enter the ra Mask Setting menu ee ee oe menu Pass Fail menu 118 Enable Test Source H Operate Next Page Page T2 M Eins Figure 73 Pass Fail Screen 2 Table 57 Mask Setting Function Menu 1 Setting Wz Turn the Universal knob to set the range of horizontal clearance to the waveform lt 0 04div 4 00div gt 1 Turn the Universal knob to set the range of vertical clearance to the waveform lt 0 04div 4 00div gt Create a test mask according to the above clearance Create External mask Next Pag
95. uct WARNING Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safety standards WARNING To avoid electrical shock hazard disconnect power cord before removing covers Refer servicing to qualified personnel CAUTION Before connecting the line cord to the AC mains check the rear panel AC line voltage indicator Applying a line voltage other than the indicated voltage can destroy the AC line fuses For continued fire protection replace fuses only with those of the specified voltage and current ratings CAUTION This product uses components which can be damaged by electro static discharge ESD To avoid damage be sure to follow proper procedures for handling storing and transporting parts and subassemblies which contain ESD sensitive components Compliance Statements Disposal of Old Electrical amp Electronic Equipment Applicable in the European Union and other European countries with separate collection systems Safety Symbols al This product is subject to Directive 2002 96 EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment WEEE and in jurisdictions adopting that Directive is marked as being put on the market after August 13 2005 and should not be disposed of as unsor
96. ursor A will measure Cursor B Set the input signal channel that the Cursor B will measure Cur A Select this option turn the Universal 4 knob to adjust horizontal coordinate of Cursor A Select this option turn the Universal knob to adjust horizontal coordinate of Cursor B Cur B Available for 4CH models only In this mode the screen displays two cross cursors The cross cursor sets the position on the waveform automatically You could adjust the cursor s 83 horizontal position on the waveform by turning the Universal knob The oscilloscope displays the values on the top left of the screen To do track cursor measurement follow these steps k Ze 3 6 7 Press CURSOR button to enter the cursor measure function menu Press the Cursor Mode option button to select Track Press the Cursor A option button to select the input signal channel Press the Cursor B option button to select the input signal channel Select Cur A turn the Universal knob to move Cursor A horizontally Select Cur B turn the Universal knob to move Cursor B horizontally The measurement values are displayed on the left of the top corner A T The horizontal position of Cursor A Time cursor centered around the midpoint of screen A V The vertical position of Cursor A Voltage cursor centered around channel ground level B T The horizontal pos
97. utton or turn the Universal knob to select No 1 5 Press the Recall option button W 101 Save Waveforms to USB Flash Drive Table 46 Save Waveforms to USB Flash Drive Function Menu waveforms drive SAVEREC Type 4 Waveforms Save To M 18 0ns Figure 61 Save Waveforms Screen To save waveforms to a USB flash drive follow the steps below 1 Inputa sine signal to channel 1 press the AUTO button Press the SAVE RECALL button to enter the SAVE RECALL display menu 3 Press the Type option button to select Waveforms 4 Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive about five seconds 5 Press the Save to option button to select File 6 Press the Save option button then you ll go into the Save Recall interface 7 Create a file then press the Confirm button about five seconds 102 there will be a message Save data success displayed on the screen Now the waveform data have been saved to the USB flash drive Recall waveforms from USB flash drive follow next steps 1 Press the SAVE RECALL button 2 Press the Type button to select Waveforms 3 Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive within ten seconds
98. utton to see the Math Menu 139 6 Press the Operation option button and select 7 Press the CH1 CH2 option button to display a new waveform that is the difference between the displayed waveforms 8 You can adjust the vertical scale and position of the Math waveform To do so follow these steps a Remove the channel and channel 2 waveforms from the display b Turn the CH 1 and CH 2 VOLTS DIV and VERTICAL POSITION knobs to adjust the vertical scale and position NOTE First be sure to compensate both probes Differences in probe compensation appear as errors in the differential signal 140 Chapter 5 Message Prompts and Troubleshooting Message Prompts e Trig level at limit Prompts you that the trigger Level is at a limit when you turn the Trig level knob e Horizon position at limit Prompts you that the horizontal position is at a limit when you turn the horizontal position knob e Volts Div at limit Prompts you that the vertical voltage has already reached the Min 2mV div or the Max 5V div e Volts position at limit The system would display this information when the vertical position is at a limit e Time Div at limit Prompts that the Time Div is at full range while turning the horizontal scale knob e Holdoff time at limit Prompts you that the holdoff time setting has reached max or min value e Function isn t useable Under several special modes some functions could
99. v then you could easily calculate your peak to peak voltage as follows 5 divisions x 100 mV div 500 mV 80 Cursor Measurement The cursor measurement has three modes Manual Track and Auto Measure Manual Mode Table 33 Manual Cursor Function Menu Option Cursor Manually adjust cursors for Mode measurement Type Voltage Use cursor to measure voltage Time parameters Use cursor to measure time parameters Source CHI Select input signal channel CH2 CH3 CH4 MATH FFT REFA REFB REFC REFD Select this option turn the Universal knob to adjust cursor A Select this option turn the Universal knob to adjust cursor B Available for 4CH models only In this mode the screen displays two horizontal parallel cursors or vertical parallel cursors to measure voltage or time You can move the cursor by turning the Universal knob Before using cursors you should make sure that you have set the signal source as the channel for measuring 81 e Voltage Cursor Voltage cursors appear as horizontal lines on the display and measure the vertical parameters e Time Cursor Time cursors appear as vertical lines on the display and measure the horizontal parameters e Cursor Moving Use the Universal knob to move cursor 1 and cursor 2 They will be moved when the corresponding cursor options are selected and the cursor value will display on the bottom left and top left of the screen when you mov
100. veform Menu Operation step 1 Press the REF menu button to display the Reference waveform menu 2 Press the Source option button to select input signal channel 3 Turn the vertical POSITION knob and Volts div knob to adjust the vertical position and scale 4 Press the third option button to select REFA or REFB as storage position Press the Save option button 6 Press the bottom option button to select REFA On or REFB On to recall the reference waveform A Note X Y mode waveforms are not stored as reference waveforms You cannot adjust the horizontal position and scale of the reference waveform 46 Horizontal System Shown below there is one button and two knobs in the HORIZONTAL area Table 13 Horizontal System Function Menu Setting Delayed On Turn on this function for main timebase waveform to display on the top half screen and window Off timebase waveform to display on the below half screen at the same time Turn off this function to only display main timebase wavetorm on the screen Horizontal Control Knob You can use the horizontal controls to change the horizontal scale and position of waveforms The horizontal position readout shows the time represented by the center of the screen using the time of the trigger as zero Changing the horizontal scale causes the waveform to expand or contract around the screen center e Horizo
101. w Voltage Directive EMC Directive EN61010 1 2001 Safety requirements for electrical equipment for measurement control and laboratory use The oscilloscope meets the following Installation Categories II Supply Connector and I Measuring Terminals Pollution Degree 2 Normally only dry non conductive pollution occurs Occasionally a temporary conductivity caused by condensation must be expected Protection Class I Provided with terminal for protective ground EN 61010 031 2002 A1 2008 Safety requirements for hand held probe assemblies for electrical measurement and test EN 61000 3 2 2006 EN 61000 3 3 1995 A1 2001 A2 2005 EN 61326 1 2006 Electrical equipment for measurement control and laboratory use 151 Appendix A Default Setup Menu or a knobs or Default setup a ee CH1 CH2 Coupling Limit rn CO lt ee o a o Saen o Cuna ee ae FFT operation E o o w man p dB Vrms Display Split Sine or 152 ACQUIRE Sampling mode Menu Display SAVE RECALL ee se TRIGGER oes Coupling 153 Real Time DC reve oe TRIGGER pao Sours CT wien ooo pooo Slope Alternate 154 Appendix B Index Width 92 Width 91 Alternative Trigger 62 Auto set 25 Blackman 42 Counter 108 Coupling 29 Creating Folders and Files 96 DEFAULT SETUP 26 Digital Filter 35 EXT TRIG 23 Fall
102. w folder button to create a new folder Press the Del folder option button to delete a folder Press the Modify option button to modify a folder Press the New file option button to create a new file Press the Del file option button to delete a file 0 Press the next page option button and press the Rename option button to modify the name of the file or the folder 11 Turn the Universal knob to select the folder and press the Confirm option button and you will save the set to the USB drive To Recall setup data from USB flash drive follow the steps below 1 Press the SAVE RECALL button 2 Press the Type button to select Setups 3 Insert USB flash drive to USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive about five seconds 4 Press the Save to option button to select File 5 Press the Save option button then you will go into the Save Recall interface 6 Choose the file you want then press the Load option button within 5 seconds there will be a message Read data success Now the setup data have been recalled from the USB flash drive oe ee e Recall Factory You can use this option to recall factory settings Table 44 Factory Function Menu E ee eee ee a a 99 SAVEREC Setups Type Wav erorrns re Picture Setiny Coy M Eins Figure 59 Set Factory Default Scr

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