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2540B/2542B DSO User Manual - 首頁

1. Softkey Options Description A B Add A and B A B Subtract B from A Operate i AXB Multiply A by B FFT Access FFT menu HJ a Vertical scale control Sot a Vertical position control Split Split the display into Main Display Screen and Math sections Mode Full Display Math waveform Screen in full screen More 2 2 Select page 1 2 46 Basic Operation Example Select the A B math function then select CH1 as the Source A and select CH2 as the Source B The resulting math waveform will look like below MATH Operate 4 Che Display Mode Math ore Status M S 6us Math A B 47 Basic Operation FFT Spectrum Analysis You can use the FFT function to measure harmonic components and distortion in systems to characterize noise in DC power supplies and to analyze vibration Press MATH channel key to turn on the MATH menu page 1 2 and then press Operate softkey to select FFT The FFT menu page 1 2 will be displayed Sait Operate FFT Source CH1 Window Rectangular Scale Y RMS Softkey Options Description A B Add A and B A B Subtract B from A Operate AXB Multiply A by B FFT Access FFT menu CH1 Select CH1 for FFT Source CH2 Select CH2 for FFT Rectangular Use Rectangular window Hanning Use Hanning window Window Hamming Use Hamming window Blackman Use Blackman window Flattop Use Flattop w
2. Softkey Options Description Confirm to delete the OK selected file or folder Cancel the delete Cancel operation Return to the EXTERNAL menu 138 Menu Operation Firmware Update 1 Press SAVE LOAD External Storage to display the EXTERNAL menu Turn the entry knob to select the correct update file UPT Press Load softkey to start the update operation A Loading followed by an updating progress bar will be displayed to indicate update status When finished a message Restart to complete updating will be displayed to remind you to restart the instrument If the software update failed repeat the above procedures to update again Note The default file extension of the update file is upt Note Select the correct update file according to the model of the oscilloscope Error message Incompatible file will be displayed if the model does not match The power supply of the oscilloscope must not be turned off during the updating process If this happens the update will fail and the instrument may fail to operate In this case you will have to return the instrument to factory for service 139 Menu Operation 3 5 CURSOR Menu You can measure waveform data using cursors Cursors are horizontal and vertical markers that indicate X axis values usually time and Y axis usually voltage on a selected waveform source The position o
3. Calibration interval Recommended calibration interval One year 195 Specifications 8 3 Certification CE Compliant CE Declaration of Conformity The oscilloscope meets the requirements of 2004 108 EC Electromagnet Compatibility Directive EMC Directive EN 61326 1 2006 EN 61000 3 2 2006 EN 61000 3 3 1995 A1 2001 A2 2005 Electrical equipment for measurement control and laboratory use 196 Performance Verification Procedure Appendix A Performance Verification Procedure e DC Gain Accuracy e Bandwidth e Trigger Sensitivity e Time Scale Accuracy 197 Performance Verification Procedure The only parameter that can be user calibrated is the DC gain accuracy If any of the other parameters bandwidth trigger sensitivity or time scale accuracy do not meet published specifications the unit must be returned to B amp K Precision for repair The oscilloscope under test must be warmed up for at least 30 minutes prior to the start of any performance test DC Gain Accuracy Equipment needed Fluke calibrator preferred or DC power supply DMM splitter 2 BNC cables 1 Disconnect all cables from the oscilloscope channel inputs 2 Press the Acquire front panel key 3 In Acquire menu press the Mode soft key until Averages appears A Turn the entry knob until 256 appears In Acquire menu press Sampling soft key and set to Real
4. Time 6 Set CH1 probe attenuation to 1X in CH1 menu 7 Press Measure button and select Voltage then go to page 2 4 and select Average 198 8 Performance Verification Procedure Connect calibrator to oscilloscope If preferred calibrator is not available connect alternative equipment as follows Oscilloscope DC Power Supply 10 11 12 13 Apply a reference signal The output level of the DC positive negative of calibrator output should be equal to 3 times the volts div setting of oscilloscope For example to test 10 mV div in CH1 the output of the calibrator should be set to 30 mV 30 mV Compare the reading of the Vavg value at the bottom of the screen real time reading of the input signal to the amplitude of your reference signal The DC gain should always be lt 4 for 2 to 5 mV div and lt 3 for 10 mV to 5 V div DC Gain AVout geet e eee eee AVin Kou Vomm In above example the difference between positive and negative input value is 60 mV Select the next volts div setting Repeat the above steps for channel 2 199 Performance Verification Procedure Bandwidth Equipment needed Fluke calibrator preferred or signal generator 1 Connect your calibrator s output to CH1 of the oscilloscope by 50ohm feed thru connector Oscilloscope Calibrator or Signal Generator 2 Set CH1 input attenuation to 5 mV div DC coupling and horizontal scan
5. when X Y horizontal mode is selected Measure the time and voltage on normal waveform Perform the following steps to take time and frequency key to display the CUROSR menu Press Mode softkey to select the Manual mode Press Type softkey to select the Time type measurements Press the CURSOR e e e Press X1 X2 softkey or press the entry knob to select X1 cursor Rotate the entry knob to move the X1 cursor Press OX1 4 X2 softkey or press the entry knob to select X2 cursor Rotate the entry knob to move the X2 cursor AX and 1 AX are displayed in the softkey area AX is the time difference between X1 and X2 1 AX is the frequency between X1 and X2 170 Quick Start Guide Perform the following steps to take voltage measurement Press the CURSOR key to display the CURSOR menu Press Mode softkey to select the Manual mode Press Type softkey to select the Voltage type Press OY1 OY2 softkey or press the entry knob to select Y1 cursor Rotate the entry knob to move the Y1 cursor Press OY1 OY2 softkey or press the entry knob to select Y2 cursor Rotate the entry knob to move the Y2 cursor AY displayed in the softkey area is the voltage difference between Y1 and Y2 171 Quick Start Guide Measure the frequency and amplitude on FFT waveform Perform the following steps to take frequency measurement Press the MATH key to display the M
6. gt D menu Print To The Print To softkey option configures what file type to store when the PRINT key is pressed Note The file can only be stored through an external USB storage device connected to the front USB device port To store a file to external USB drive do the following 1 Connect a USB flash drive to the USB device connector on the front panel 90 Menu Operation 2 Press File Type softkey to select the file format you want 3 Press the PRINT key to save the file to the USB drive lf BMP is selected it will take a screen capture of the display and store it as a BMP file If CSV is selected it will store the CSV data that represents the waveform on the display Note The BMP options will print out everything that is as shown when PRINT key is pressed including the opened softkey menu To get a screen capture without an opened softkey menu please use the MENU ON OFF key to turn off the menu on the display before printing to a file File Type BMP 8 bit Stores in BMP file format with 8 bit color resolution Note Some software or image viewer may not be able to view this file format BMP 24 bit Stores in BMP file format with 24 bit color resolution 91 Menu Operation CSV Stores the waveform data captured on the frame of the screen into CSV file format Depending on the timebase the maximum number of points that can be stored into CS
7. Disabling Auto Function for details 2 3 Vertical Controls Vertical controls Vertical Position Knob CH1 CH2 Turn the small vertical position knob above the channel key to move the channel s waveform and its ground level icon a up or down on the display The voltage value momentarily displayed shown below in the bottom left corner of the display represents the voltage difference between the vertical center of the display and the ground level a 31 Basic Operation 166NSa s M 56 Gus Press the vertical position knob to bring the channel s waveform and its ground level icon a directly back to the vertical center of the display Vertical Scale Control CH1 CH2 Turn the large vertical scale knob below the channel key to set the scale factor for the channel The vertical scale knob changes the channel scale in a 1 2 5 step sequence The channel scale factor value is displayed in the bottom left portion of the display Press the vertical scale knob to toggle between Fine and Coarse control When fine is selected you can change the channel s vertical sensitivity in smaller resolution When 32 Basic Operation coarse is selected the vertical scale knob changes the channel scale in a 1 2 5 step sequence Channel Keys CH1 Press the channel key from the front panel to display the channel s menu and turn the display of the channel on or off The channel is displayed when the key is illuminat
8. ground terminal to ground before you take any measurements 24 Getting Started 1 7 Probe Attenuation Probes are available with various attenuation factors which affect the vertical scale of the signal You can push a vertical menu button such as the CH 1 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 The included probes can switch between 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 1 8 Probe Compensation Perform this adjustment to match your probe to the input channel This should be done whenever you attach a passive 25 Getting Started probe for the first time to any input channel A poorly compensated probe can introduce measurement errors 1 Set both the probe and the oscilloscope attenuation factor to X10 respectively 2 Connect the oscilloscope probe to channel 1 Attach the probe tip and reference lead to the probe compensation terminal and to the chassis ground terminal then press AUTO key 3 Use a nonmetallic tool to adjust the trimmer capacitor on the probe for the flattest pulse possible see Correc
9. 16 32 64 128 or 256 Equivalent Equivalent sampling Sampling Real Time Real time sampling Record Select Record menu de softkey to select Peak Detect mode Softkey Options Description Normal Normal acquisition Average Average acquisition Mode Peak Peak detect Detect acquisition Equivalent Equivalent sampling Sampling Real Time Real time sampling Record Select Record menu 122 Menu Operation Connect a sine wave signal to the CH1 channel press AACQUIRE Mode to select Average mode Turn the Entry knob to set the number of averages to 16 The following two figures show the difference between Normal acquisition and Average acquisition CT La L Random noise on the displayed waveform 123 Menu Operation mad ACQUIRE Mode Averages 16 Sampling Record 16 Averages used to reduce random noise 124 Record Wavefrom Menu Operation Press ACQUIRE Record to show the RECORD menu see Softkey Options Description Mode AcE Turn off record R function source Record Record the waveform Interval Moa Play Playback recorded r 4 ode 1 Back waveform EE Save to Recall from 1000 Save SSeS internal or external Operate Recall Ca e CH1 Record CH1 channel CH2 Record CH2 channel Source Pass Fail Record Pass Fail Out output waveform Interval a Set the time interval
10. 19200 38400 Network Select LAN menu Settings 5 Return to the B UTILITY menu 86 Menu Operation Press Network Settings softkey to display the LAN menu Softkey Options Description DHCP ty ON IP address together with subnet mask and gateway address will be set by DHCP server automatically OFF You have to set IP address subnet mask and gateway address manually Move the cursor position vertically available when DHCP is OFF Move the cursor position horizontally available when DHCP is OFF Confirm and apply the current settings Return to the I O SETUP menu 87 Menu Operation Follow the following steps to manually configure the LAN interface Configure Status Not configured MAC Address 66 0 99 00 00 08 IP Address o SR ER K Sunnet Mask 4 Gateway IP a DNS IP a M 2 6us Set the IP Address Contact your network administrator for the IP address to use All IP addresses take the dot notation form nnn nnn nnn nnn where nnn in each case is a byte value in the range 0 through 255 Move the cursor to the IP address position and change the IP address using the entry knob Set the Subnet Mask The subnet mask is required if your network has been divided into subnets Move the cursor to the subnet mask position and enter the subnet mask in the IP address format using the entry knob Set the Gateway I
11. 94 fuse 15 GND coupling 35 Holdoff 69 Invert 43 Key Lock 96 Key Test 99 Main mode 57 Index 204 Mask 103 odd fields 75 Overshoot 109 Pass Fail 101 Peak Peak 107 Persist 147 Playback 126 Preshoot 109 Pulse Width Trigger 73 quick help 28 Record Wavefrom 125 REF 52 Roll mode 63 Screen Test 99 Self calibration 83 Trace 131 trigger level 66 Trigger Modes 67 vertical position knob 31 vertical scale 32 Video Trigger 75 X Y 61 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 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 shi
12. CH1 CH2 Trigger on CH2 EXT Trigger on EXT Source EXT 5 Trigger on EXT 5 Trigger on CH1 and Alternating CH2 alternately TL Positive polarity Polarity LI Negative polarity Odd Field Trigger on odd fields Even Field Trigger on even fields Sync l All Lines Trigger on all lines Line Trigger on specific line More 1 2 Select page 2 2 75 Basic Operation Press softkey More 1 2 to display the TRIGGER menu page 2 2 TRIGGER Type Standard Mode Trigger Setup Softkey Options Description Video Video triggering Type Edge Edge triggering Pulse Pulse width triggering NTSC Trigger on NTSC signal Standard Trigger on PAL or PAL SECAM SECAM signal Trigger only on a valid Normal event Mode e Trigger even without a Auto valid event Trigger Select trigger SETUP Setup menu More 2 2 Select page 1 2 76 Basic Operation Press softkey Trigger Setup from the TRIGGER menu page 2 2 to display the trigger SETUP menu 18div Coupling Holdoff gt 146ns Holdoff Reset Softkey Options Description Set the trigger sensitivity Sensitivity D by turning the entry knob AC AC coupling DC DC coupling Coupling LF Reject Reject low frequencies HF Reject Reject high frequencies Set up the holdoff time Holdoff D between two consecutive triggers Holdoff Reset the holdoff time to Reset A defa
13. Function 70 Basic Operation Edge Trigger Use the Edge triggering to trigger on the rising or falling edge of the input signal at the trigger threshold Press trigger control MENU key to display the TRIGGER menu then press Type softkey to select Edge trigger 71 TRIGGER Type Mode Trigger Setup Basic Operation Softkey Options Description Video Video triggering Type Edge Edge triggering Pulse Pulse width triggering CH1 Trigger on CH1 CH2 Trigger on CH2 EXT Trigger on EXT Source EXT 5 Trigger on EXT 5 AC Line Trigger on AC line signal Trigger on CH1 and Alternating CH2 alternately F Rising edge of a signal Slope Falling edge of a signal Trigger even without a Auto j valid event Mode Trigger only on a valid Normal event Trigger Select trigger SETUP Setup menu 72 Basic Operation Pulse Width Trigger Pulse width triggering sets the oscilloscope to trigger on a positive or negative pulse of a specified width from 20 ns to 10s Press trigger control MENU key to display the TRIGGER menu page 1 2 then press Type softkey to select Pulse trigger Zeen Softkey Options Description Type Video Video triggering Type Edge Edge triggering Source Pulse Pulse width triggering CH1 Trigger on CH1 CH2 Trigger on CH2 EXT Trigger on EXT Source EXT 5 Tr
14. K Precision if the DSO fails to load the main screen Basic Check Please follow the steps below when checking the oscilloscope s functionality 1 Power on the oscilloscope Press SAVE LOAD and Select Factory to set DSO to factory settings The probe default attenuation is 1X 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 compensation terminal 22 Getting Started 3 Press AUTO to show the 1 kHz frequency square wave in a few seconds 4 Press CH1 two times to cancel the channel 1 Press CH2 to change screen into channel 2 reset the channel 2 and repeat step 2 and step 3 for CH2 23 Getting Started 1 6 Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements Note To avoid electric shock when using the probe keep fingers behind the guard on the probe body Note 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
15. REF Scale Value Save a Reference waveform Note The reference waveform function is unavailable when X Y mode is selected 53 Basic Operation 2 4 Horizontal Controls Use the horizontal controls to adjust the time base adjust the trigger location and to examine waveform details more closely Horizontal Controls 54 Basic Operation Horizontal Position Control When the oscilloscope is running this control lets you set the acquisition window relative to the trigger point When the oscilloscope is stopped you can turn this knob to pan through the data horizontally This lets you see the captured waveform before the trigger or after the trigger The trigger position is marked with the indicator 0 at the top of the graticule and also in the waveform record data icon at the top of the screen The small inverted triangle is the time reference indicator When you change the horizontal scale the waveforms contract or expand about this point Press the horizontal position control knob key to set the time delay to zero and the trigger position indicator will move right below the time reference indicator Note The horizontal position control is unavailable when X Y horizontal mode is selected Horizontal Scale Control Use the horizontal scale control to adjust the time base The scale expands or contracts around the center of the screen The horizontal scale factor can be set in a 1 2 5 sequence 5
16. Signal Press the Trigger MENU key to display the TRIGGER menu Press the Type softkey to select the Video trigger mode Press Source softkey to select CH1 Press Polarity softkey to select negative polarity U Press Sync softkey to select Odd Field or Even Field OE EEE Quick Start Guide Trigger on a Specific Line or All Lines of the Video Signal Press the Trigger MENU key to display the TRIGGER menu Press the Type softkey to select the Video trigger mode Press Source softkey to select CH1 Press Polarity softkey to select negative polarity U Press Sync softkey to select Line or All Lines Tig TRIGGER Type Source CHI More M 166us 163 Quick Start Guide 5 5 PASS FAIL Measurement The oscilloscope measures and compares the input signal with predefined Pass Fail thresholds If the input signal is within the thresholds PASS signal will be outputted If the input signal exceeds the thresholds FAIL signal will be outputted Perform the following steps to make a PASS FAIL measurement Press UTILITY key to display the UTILITY menu page 1 2 Press More 1 2 softkey to display the UTILITY menu page 2 2 Press Pass Fail softkey to display the PASS FAIL menu Press Enable Test softkey to turn on the PASS FAIL measurement Press Setup Mask softkey to display the MASK menu Press X Mask softkey and then rotate the entry knob to setup the horizontal threshol
17. a REF vertical scale control Sot a REF vertical position control Volts Coarse Coarse vertical scaling Volts Scale Scale Fine Fine vertical scalin More More S 72 K i elect page 2 2 ni 1 2 51 Basic Operation Press softkey More 1 2 to display REF menu page 2 2 REF Invert OFF Internal Storage Press REF press softkey More 1 2 to display REF menu page 2 2 Load the latest saved reference waveform from the internal memory by selecting Internal Storage or locate and load reference waveform file from the external memory by Softkey Options Description ON REF invert ON Invert OFF REF invert OFF Save the reference Internal INTERNAL waveform to the Storage menu l internal memory Save the reference External EXTERNAL waveform to the Storage menu USB mass storage device More Select page 1 2 2 2 channel key to turn on the REF menu page 1 2 selecting External Storage You can use the horizontal position and scale control knob to change the time base of the reference waveform 52 Basic Operation Press MP or Mit softkey and turn the Entry knob 4 to change the vertical scale or position of the reference waveform Press REF Internal Storage Save to save the waveform of the Source channel as the reference waveform to the internal memory Jg INTERNAL Save Load REF 8 Status aad 266m 266us M 266us
18. data WAIT Waiting to be triggered Tod DSO has seen a trigger and is acquiring post trigger data Trig Looking for trigger ROLL When horizontal mode is set to Roll Soft key menu which allows you to set up additional parameters from front panel soft keys The display area contains the waveform acquisitions channel identifiers trigger and ground level indicators Each channel s information appears in their respective color Trigger readout shows trigger information such as trigger source trigger type as well as trigger level 20 Getting Started 10 Horizontal readout shows the Main or Delayed time base 11 Channel readouts show the scale factor coupling bandwidth limit digital filter and invert status 12 Waveform baseline icons show the zero volt level of the waveforms The icon colors correspond to the waveform colors 1 5 Quick Check Upon receiving the instrument inspect for any noticeable physical damages or unresponsive panel buttons If there are any problems please contact B amp K Precision immediately Power On Check Connect the AC Power Cord to the power input socket on the side of the DSO Press down the power switch button at the top of the DSO to the ON position EL Verify that the instrument turns on and the LCD screen goes into an initial boot screen 21 Getting Started Press any key for the screen to load into the main screen showing the graticule Contact B amp
19. menu More 2 2 Select menu page 1 2 Note The default password is 111111 95 Menu Operation Key Lock Press UTILITY System Setup Key Lock to lock the front panel operation all the keys and controls When key lock is on all keys are disabled except MENU ON OFF key and the five softkeys When front panel is locked a red lock icon is displayed at the top left corner of the screen Correct password is required to unlock the front panel operation when Password is ON as shown below The default password is 111111 DOM EE ECTS Cie 96 Menu Operation Password Protection Press Password softkey from the SYSTEM menu 2 2 to turn off the Password protection function correct password is required as shown below ABCDEFGH UI KY 28 97 Menu Operation Change Password Press Change Password softkey from the SYSTEM menu page 2 2 to display the CHANGE menu The old password is required before entering and confirming the new password as shown below AUTORS F LEs Enter old password Cancel ABC TUUN M 166us 98 Menu Operation Service Press UTILITY SERVICE system Info Screen Test Key Test Service to display the Service menu Softkey Options Description Display system information Model System Serial number Information e Software version Installed modules Screen Test
20. menu key to show the UTILITY menu UTILITY Menu key 81 Menu Operation Press the 1 2 UTILITY key to display the UTILITY menu page UTILITY 1 0 Setup Print Setup System Setup Language English More Softkey Options Description UO Setup Select I O SETUP menu Print Select PRINT menu Setup System Se Select SYSTEM menu Setup fail fA SC Simplified Chinese sy8ch Traditional Chinese English English language e Korean language H Japanese language Language Pyccku Russian language Fran ais French language Espa ol Spanish language Polski Persian language Portugu s Portuguese language More 1 2 Select menu page 2 2 82 Menu Operation Press the More 1 2 softkey to display the UTILITY menu page 2 2 Mika Softkey Options Description Service Select Service menu Service h Select PASS FAIL EPSA Pass Fail SR Pass Fail Venn RUN STOP Start self calibration Self Cal Self Cal AUTO Exit self calibration PA Fast calibrate the OFF ON Se es Fast Cal vertical position 2 2 OFF Turn off fast calibration More 2 2 Select menu page 1 2 Self Calibration If you want to maximize measurement accuracy you can perform a self calibration Self calibration uses the internally generated signals to optimize
21. message will be displayed when you press the AUTO key without any signal connected to each channel Invalid data This message will be displayed when you try to save a CSV TRC or WFM file without any valid waveform data 181 Troubleshoot Guide Load finished This message will be displayed when a file has been successfully loaded from the internal or external memory Save finished This message will be displayed when a file has been successfully saved to the internal or external memory Incompatible file This message will be displayed when the update firmware file does not match with the model type Load error This message will be displayed when you fail to load a file from the internal or external memory Restart to complete updating This message is to inform the user to restart the oscilloscope after a firmware update to finish the process USB device is installed This message will be displayed when a USB device is connected and recognized by the oscilloscope USB device is removed This message will be displayed when a USB device is removed from the oscilloscope USB error This message will be displayed when the USB control circuit is not working normally 182 Troubleshoot Guide No help file This message will be displayed when no help file is loaded or the loaded help file is corrupted Digital filter is closed This message will be displayed when digital filter is closed automatica
22. points of the first positive leading edge of each channel Delay t21 Delay F2 The time between the 50 amplitude points of the first negative trailing edge of each channel The time between the first positive leading edge of CH1 and the first negative trailing edge of CH2 at each 50 amplitude point Delay t2 The time between the first negative trailing edge of CH1 and the first positive leading edge of CH2 at each 50 amplitude point More 3 5 Display menu page 4 5 114 Menu Operation Mi ff Ge CH _ lt Delay SR gg Delay Ex 20 definition 115 Menu Operation Press More 3 5 softkey to display the TIME menu page 4 5 Softkey Options Description F E pp Phase 1 2 is the ratio of Phase 1 2 ase Sep Delay 1 2 to the period of ZA 1 2 CH1 expressed in degrees T Phase 2 1 is the ratio of FEL Phase Delay 2 1 to the period of LER TF rie CH2 expressed in degrees X at Max is the X axis value More 4 5 refer to Trigger point at the first displayed X at Max occurrence of the waveform Maximum starting from the left side of the display X at Min is the X axis value refer to Trigger point at E the first displayed X at Min occurrence of the waveform Minimum starting from the left side of the display More 4 5 Display menu page 5 5 116 Menu Operation _ CH2
23. turning the Entry knob Vertical Control knobs Horizontal Control knobs or Trigger Level knob Total is at its maximun This message will be displayed when the maximum value of Total count for PASS FAIL has reached Record is completed This message will be displayed when the number of waveforms set in the End Frame softkey have been recorded or when you press the Operate softkey to stop the record process manually No external memory This message will be displayd when you try to save a file to an external mass storage device which has not been installed Save error This message will be displayed when you fail to save a file to the internal or external memory 180 Troubleshoot Guide Empty storage memory This message will be displayed when you try to load a file which does not exist from the internal memory Unrecognized file This message will be displayed when you try to load a file which can not be recognized by the oscilloscope from the external memory Update failed This message will be displayed when firmware update has failed No record data This message will be displayed when you try to save or playback a record without recorded data Record is aborted This message will be displayed when Operate softkey is pressed to stop record process without any waveform data recorded Factory setup is recalled This message will be displayed when the default factory configuration is recalled No signal is found This
24. 2A between Y1 and Y2 Calculate the phase difference using the formula below d det or O ge D B 175 Remote Control 6 REMOTE CONTROL e Comsoft Software e Web Browser GUI Graphic user Interface 177 Remote Control 6 1 Comsoft Software The 2540B and 2542B comes with Comsoft application software which provides most of the controls of the oscilloscope s display measurements waveform data and front panel emulation control through the USB device port in the rear panel The software is free and can be downloaded at www bkprecision com 6 2 Web Browser GUI The DSO has a build in web browser interface that can be used for some basic LAN configurations and quick screenshot capture via LAN interface at the rear panel To access simply set the DSO to LAN interface and configure all the necessary settings see I O Setup section Noting the IP address configured on the oscilloscope enter it at the address bar of a Java enabled web browser for access 178 Troubleshoot Guide 7 TROUBLESHOOT GUIDE e System Messages e General Problems 179 Troubleshoot Guide 7 1 System Message Function is not available The control knob key or softkey is not available under a specific operating condition This message will be displayed when you try to operate these knob key or softkey The control is at its limit This message will be displayed when the maximum or minimum value has reached from
25. 5 Basic Operation Press the horizontal scale control knob to toggle between Main and Delayed horizontal display mode Horizontal MENU key Press the horizontal MENU key to display the HORIZONTAL menu This menu lets you select the horizontal mode Main Delayed Roll or X Y Press the horizontal MENU key to display the HORIZONTAL menu page 1 2 TEMEI Softkey Options Description Main y Main mode is ON ya Main SR Main mode is OFF Delayed V Delayed mode is ON Delayed Delayed mode is OFF y X Y mode is ON X Y Foll X Y mode is OFF GER y Roll mode is ON RE Roll 1 2 Roll mode is OFF Mores Select 2 2 elect page 1 2 ds 56 Basic Operation Press softkey More 1 2 to display the HORIZONTAL menu page 2 2 Softkey Options Description Trig Offset Reset the delay time Reset Ce to zero Btls Select page 1 2 2 2 Main Horizontal Mode Main horizontal mode is the normal viewing mode for the oscilloscope When the oscilloscope is stopped you can use the horizontal controls to pan and zoom the waveform When the oscilloscope is running in Main mode use the horizontal scale knob to change horizontal scale factor and use the horizontal position knob to set the delay time The time base second division value is displayed at the bottom of the screen Press the horizontal MENU key and the
26. 50 Time CH150 Time R CH1 Period Phase 1 2 360 _ CH150 Time CH2 50 Time S CH2 Period Phase 2 1 360 Period gt cmH NOK a Delay CH2 Phase 1 2 definition Press More 4 5 softkey to display the TIME menu page 5 5 Softkey Options Description Return to the MEASURE gt D menu More 5 5 Display menu page 1 5 117 Menu Operation Automatic Measurement Procedure Measure All Press MEASURE Measure All to turn on all Auto Measurements Up to 20 kinds of measurements of current channel are displayed on the center of the screen Press Measure All again to turn off all Auto Measurements Display Measurements Press MEASURE Voltage to display the VOLTAGE menu or press MEASURE Time to display the TIME menu 118 Menu Operation Press softkey of voltage or time parameters you want to measure The selected parameter will be displayed on the bottom of the display Press Clear softkey to clear all displayed measurement parameter s Note Up to three parameters can be displayed simultaneously at the bottom of the display Press the parameter softkey to add a new parameter when three parameters are already displayed The first parameter will be pushed out of the display window and the new parameter will be displayed on the bottom right of the display screen Note
27. EASURE menu Softkey Options Description CH1 Measure CH1 Source CH2 Measure CH2 Select the Voltage Voltage measurement menu Select the Time Time Gees measurement menu Turn off the current Clear measurement readouts Display all Measure ON play i measurements OFF Close all measurements 106 Menu Operation Voltage Measurements page 1 4 ae d di SE E Amplitude More 174 Voltage parameter definitions Press Voltage to display the VOLTAGE menu Softkey Options Description The Peak Peak value is the difference between Peak Peak SES i S maximum and minimum values The Amplitude value is Amplitude Seen the difference between High and Low values Max is the highest value Max f in the waveform display Min is the lowest value Min l in the waveform display More 1 4 Display menu page 2 4 107 Menu Operation Press More 1 4 softkey to display the VOLTAGE menu page 2 4 ToC E Softkey Options Description High High value is the mode most common value of the upper part of the waveform Low Low value is the mode most common value of the lower part of the waveform Average Average value is the sum of the samples divided by the number of samples over the entire waveform RMS RMS value is the true Root Mean Square voltage over the ent
28. End e Maximum record Frame frame E Record Operate Stop 125 Menu Operation Playback Record Press ACQUIRE Record to show the RECORD menu Press Mode softkey to select Playback function nza Softkey Options Description Mode Record Record the waveform Pla Operate B A Playback the record ZK Play Mode Mode e Save Recall from ave C internal or external Current Frame Recall ear y TORR OFF Exit Record function l gt Play Operate a Stop Play C P Loop play Mode H Single play Current Select a specific VW Frame frame More 1 2 Select menu page 2 2 126 Press RECORD ACQUIRE Menu Operation Record to show the RECORD menu Press Mode softkey to select Play Back function Press More 1 2 softkey to show RECORD menu page 2 2 Softkey Options Description Interval between two Interval D frames Start 3 Set the start frame to Frame playback End o Set the end frame to Frame playback Msg ON Record message on Display OFF Record message off More Select menu page 1 2 2 2 Note The interval time must be greater than 1 ms signal period sampling interval time frame storage time Note Frame length is the waveform storage depth Maximum of 1000 frames of waveform can be stored 127 Menu Operation Save Recall the Record Press ACQUIRE
29. P The gateway address is the address of a gateway which is a device that connects two 88 Menu Operation networks Move the cursor to the Gateway IP position and enter the gateway address in the IP address format using the entry knob Set the DNS IP DNS is an internet service that translates domin names into IP addresses Move the cursor to the DNS IP position and enter the address of the DNS server in the IP address format using the entry knob Note Note If you are manually entering the LAN settings you may need to restart the oscilloscope for settings to apply If you are using DHCP first turn on DHCP then select OK and wait a few seconds until the Configure Status shows DHCP Otherwise it may not be able detect the correct DHCP settings from the connected network The instrument does not support socket or telnet connection When interfacing over LAN if settings were changed or refreshed from selecting OK from softpanel menu the instrument may need to be rebooted first before it can be connected for remote control 89 Menu Operation Print Setup Press UTILITY Print Setup to display the PRINT menu PRINT Softkey Options Description mS Print to File Print to file BMP 8Bit 8 Bit BMP file format File Type BMP 24Bit 24 Bit BMP file format Screen CSV CSV file format Normal Normal BMP picture Screen PJ Inverted Inverted color BMP picture Return to the UTILITY
30. Package Contents e Input Power Requirements e Panel and Screen Display e Quick Check e Probe Safety e Probe Attenuation e Probe Compensation 13 Getting Started 1 1 Introduction The 2540B and 2542B are part of a series of portable digital storage oscilloscopes DSOs that offer up to 100 MHz bandwidth with a 1 GSa s sample rate Features 60 100 MHz bandwidth 2540B 2542B 1 GSa s sample rate Bright 5 6 TFT color display Deep waveform memory up to 2 4 Mpts accesible via remote interface Shortcut keys for quick access of frequently used functions Versatile triggering capabilities including pulse width line selectable video slope and alternating trigger 24 automatic measurements Digital filter with adjustable limits pass fail testing and waveform recorder mode Ten different language user interfaces For educators ability to disable the Auto Set button LAN and USB host connectivity for remote PC control through Comsoft PC software USB device port for convenient storing and recalling of waveform data setups and screenshots on a USB flash drive 14 Getting Started 1 2 Package Contents The digital storage oscilloscopes are shipped with the following contents 2540B 2542B Digital Storage Oscilloscope User Manual Certificate of calibration USB Type A to B communication cable AC Power Cord Two 150 MHz 1x 10x passive oscilloscope probes Please locate each item from the original packa
31. Pie EPA 8 rie Ww BK Model 2540B 2542B 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 that 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 must 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 a definite safety h
32. Record to show the RECORD menu Press Mode softkey to select Save Recall function Softkey Options Description Mode Record Record the waveform Pla Start Frame Playback the record back 1 End Frame Mode Save Recall from Save f 1906 internal or external Internal Recall memory storage OFF Exit Record function Start D Set the start frame to Frame save End Set the end frame to Frame save Internal Save Recall from Storage internal memory External Save Recall from Storage external memory 128 Menu Operation Exit Record Function Press Mode softkey to select OFF option and return to the ACQUIRE menu OFF Softkey Options Description Record Record the waveform Play back Play back the record Save Recall from Mode Save e internal or external Recall memory OFF Exit Record function Return to ACQUIRE 5 Se 129 menu Menu Operation 3 4 SAVE LOAD Menu SAVE LOAD Internal storage External Storage Factory SAVE LOAD MENU key Press SAVE LOAD key to display the SAVE LOAD menu Softkey Options Description Internal Display the INTERNAL Storage D menu External Display the EXTERNAL Storage D menu Set the instrument to the Factory factory default configuration 130 Menu Operation Internal Storage Saving Loading Trace Press SAVE LOAD Internal Stor
33. V is 1200 pts Note Deep memory data cannot be stored into a CSV file to a USB flash drive It can only be obtained by remote control over USB RS232 or LAN interface located in the rear panel of the instrument Screen Normal Prints the screen with normal colors Inverted Prints the screen with inverted colors 166kSa s H 1 00s 92 Menu Operation Normal 8 90005 100kSa s M 1 00s f CHi f 160mY Inverted 93 Menu Operation System Setup Press UTILITY menu page 1 2 Counter OFF More System Setup to display the SYSTEM Softkey Options Description Key dr Key press sound on Sound SC Key press sound off Alarm de Alarm sound on Sound fx Alarm sound off ON Frequency counter on Counter OFF Frequency counter off More 1 2 oars Select menu page 2 2 Frequency Counter Select the Counter softkey to toggle between enabling and disabling frequency counter shown on screen 94 Menu Operation Press the More 1 2 softkey to display the SYSTEM menu page 2 2 Softkey Options Description ON Key Lock function on Key Lock function off a Key Lock OFF password is required when Password is ON ON Password protection on Password protection off a Password OFF password is required when Password is ON The old password is Change required to change the Password password 5 Return to the UTILITY
34. across the screen from right to left Note It only operates on time base settings of 500 ms div or slower If the current time base setting is faster than the 500 ms div limit it will be set to 500 ms div when Roll mode is selected In Roll mode there is no trigger The fixed reference point on the screen is the right edge of the screen and refers to the current moment in time Events that have occurred are scrolled to the left of the reference point Since there is no trigger no pre trigger information is available H you would like to pause the display after a full screen of acquisition in Roll mode press the SINGLE key To clear the display and restart another full screen acquisition in Roll mode press the SINGLE key again Press the horizontal MENU key and then press the Roll softkey to select the Roll mode The waveform will move slowly across the screen from right to left The fastest time base is 500 ms in roll mode 63 Basic Operation Roll Status HORIZONTAL Main Delayed Rall wv More Horizontal Time Base Roll Horizontal Mode 64 Basic Operation 2 5 Trigger Controls The trigger controls determine when the oscilloscope starts to acquire and display the waveform When a trigger is found the oscilloscope will acquire sufficent data to display the waveform Note Trigger controls are functional when the oscilloscope works under Main or Delayed hor
35. age Storage type to display the INTERNAL menu and select Trace storage type Storage type Load 2 ep Softkey Options Description Storage Traces Trace file format type Setups Setup file format Select a trace file from Tracexx a Trace to Trace10 Save the display to current Save trace file Load Load the current trace file 5 Return to the SAVE LOAD menu Note A trace is similar to a reference waveform except it only stores recalls a trace of exactly what s shown within the display frame only and not any other part of the record data It cannot be adjusted with horizontal or vertical controls To clear the trace on display use the Clear 131 Menu Operation Persistence softkey under the DISPLAY menu See DISPLAY Menu for details Saving Loading Setups Press SAVE LOAD Internal Storage Storage type to display the INTERNAL menu and select Setups storage type KGR Softkey Options Description MUA Storage Traces Trace file format type Setups Setup file format Select a setup file from Setupxx a Setup01 to Setup10 Save the current Load Save configuration to the current setup file 5 Load from the current setup Load l file 5 Return to the SAVE LOAD menu Note Each setup stores all the horizontal vertical and trigger control settings This includes and not limited t
36. als of the same frequency under X Y display mode Connect a sine wave signal to CH1 and a sine wave signal of the same frequency but out of phase to CH2 Press horizontal MENU key to display the Horizontal menu Press X Y softkey to select X Y display mode Center the signal on the display with the vertical control knob of each channel Use the vertical scale control knob of each channel to expand the signal for convenient view Press the CURSOR key to display the CURSOR menu Press Mode softkey to select the Manual mode Press Source softkey to select CH2 Press Type softkey to select the Voltage type Press OY1 OY2 softkey or press the entry knob to select Y1 cursor Rotate the entry knob to move the Y1 cursor to the top of the signal Press OY1 tOY2 softkey or press the entry knob to select Y2 cursor Rotate the entry knob to move the Y2 cursor to the bottom of the signal AY displayed in the softkey area is the voltage difference D or 2B between Y1 and Y2 174 Quick Start Guide Press OY1 OY2 softkey or press the entry knob to select Y1 cursor Rotate the entry knob to move the Y1 cursor to the upper intersection of the signal and Y axis Press OY1 OY2 softkey or press the entry knob to select Y2 cursor Rotate the entry knob to move the Y2 cursor to the lower intersection of the signal and Y axis AY displayed in the softkey area is the voltage difference C or
37. ath menu Press the Operate softkey to select FFT and display the FFT menu Press the CURSOR key to display the CUROSR menu Press Mode softkey to select the Manual mode Press Source softkey to select FFT Press Type softkey to select the Time type Press OX1 X2 softkey or press the entry knob to select X1 cursor Rotate the entry knob to move the X1 cursor Press OX1 4 X2 softkey or press the entry knob to select X2 cursor Rotate the entry knob to move the X2 cursor AX displayed in the softkey area is the frequency difference between X1 and X2 1 AX is the time difference between X1 and X2 Perform the following steps to take voltage measurement Press the MATH key to display the Math menu Press the Operate softkey to select FFT and display the FFT menu Press the CURSOR key to display the CUROSR menu Press Mode softkey to select the Manual mode 172 Quick Start Guide Press Source softkey to select FFT Press Type softkey to select the Voltage type Press OY1 OY2 softkey or press the entry knob to select Y1 cursor Rotate the entry knob to move the Y1 cursor Press OY1 OY2 softkey or press the entry knob to select Y2 cursor Rotate the entry knob to move the Y2 cursor AY displayed in the softkey area is the voltage difference between Y1 and Y2 173 Quick Start Guide Measure the phase difference between two sign
38. azard 3 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 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 produc
39. cal Scale 42 Basic Operation Vertical Invert Press CH2 More 1 2 Invert to set Invert on or off When Invert is turned on the voltage values of the displayed waveform are inverted Invert affects how a channel is displayed but does not affect triggering If the oscilloscope is set to trigger on a rising edge it remains set to trigger on the same edge after the channel is inverted Inverting a channel will also change the result of any math function selected in the MATH menu or any measurement HACK Volts Scale Coarse Invert COFF Ee Invert OFF M 266us Vertical Invert off 43 Basic Operation 1 KO IE Coarse Invert Invert ON M 266us Inversion Status Vertical Invert on 44 Basic Operation MATH Functions Dual Waveform Calculation Press MATH channel key to turn on the MATH menu page VY MATH Softkey Options Description siiis A B Add A and B A B S A B Subtract B from A Source 4 Operate CHI AXB Multiply A by B Source B FFT Access FFT menu CH2 CH1 Select CH1 as Source A Invert Source A OFF CH2 Select CH2 as Source A Se CH1 Select CH1 as Source B More Source B 1 2 CH2 Select CH2 as Source B ON Math invert ON Invert OFF Math invert OFF More 1 2 Select page 2 2 45 Basic Operation Press softkey More 1 2 to display MATH menu page 2 2 MATH Operate Mlore
40. cale Control CH1 CHE 32 Channel Keys ER CES 33 CAT CH ep ere d Eed e 33 MATA FUNCIONS EE 45 REF FUNCUOI nsanra aaen ie Mees sealed stages 51 2 4 Horizontal Controls eecceeeeeeeeeeeeeeeeeeeneees 54 Horizontal Position Control 55 Horizontal Scale Conirol 55 Main Horizontal Mode eeesseeeeeeeeneeenneerirneereneens 57 Delayed Horizontal Mode cseeesseeeeeeeeenneerenneeeenn 59 X Y Horizontal Mode 61 Roll Horizontal Mode ssesseeeeeeeeeeeeeirneerinreernneeennse 63 2 5 Trigger Controls tegen geugguetek ek SEENEN 65 2 6 ETC Re ue 79 3 MENU OPERATION use 80 3 1 UTILITY On EE EN VO Setup 33s gee ies a ea aaa aaa 86 System SelUp EE 94 EIER e ae ni eile aie ee 99 e 101 3 2 MEASURE Menu tsviinisieuieuininaieuieiins 105 Voltage Measurements ccccecceceeenteeteetieeeteeneeeenes 107 Time Measuremients cceeeteteeeeneeeeteenteeeeeenieeeeeenineees 111 3 3 ACQUIRE Men 120 Record Wavetrom 125 Playback Hecord orraa a e REN 126 Save Recall the Hecord 128 Exit Record FUNCTION seias reit EEN 129 3 4 SAVE LOAD Menu cccccceeeeeeeeeeeeeeeeeeeeees 130 Internal Storage cccccccceeccsssececeecenesesneeseeneeceneeesnneees 131 External Storage ccsccccsccceesceceeneesssnsssseecseneesennnetaes 133 Firmware Update nosia sni A AA 139 3 5 CURSOR Men EEN 140 Manual Mode iniiieininiriniie nisinsin ii iia 141 Tack ee ee aan deed EE 143 AUTO Medea eet ee d 145 3 6 DISPLAY Me
41. circuits that affect channel scale offset and trigger parameters for all the divisions over the full range Disconnect all inputs and allow the oscilloscope to warm up at least 30 minutes before performing self calibration 83 Menu Operation Press UTILITY Self Cal to display the self calibration page Press AUTO key to exit the Self Calibration or press RUN key to start the self calibration Disconnect everything from CH1 CH2 and EXT TRIG Press RUN key to start Press AUTO key to exit Self Calibration Note Warm up the oscilloscope at least 30 minutes before performing self calibration Do not have anything connected to any of the inputs Doing so will create errors and instrument may fail to calibrate properly 84 Menu Operation Fast Calibration Fast calibration is ideally used to calibrate the instrument to remedy the effects of temperature drift causing an offset drift It calibrates the center position of each Volt Div setting but not for the full range This is different compare to self calibration in which the channel scale offset and trigger are calibrated 85 Menu Operation LO Setup Press UTILITY I O Setup to display the UO SETUP menu Eal Softkey Options Description rpe Select USB USB Device interface Select RS232C Type RS232C interface Select LAN LAN interface aan Available baud rate em CO 2400 4800 9600 Rate
42. cter position Delete Delete the selected Character character Save Save the new file 5 Return to New menu Note Maximum length of a file name is 8 characters Press Enter Character to select a character position in the file name Turn the entry knob to select a character Press Delect Character to delete the current selected character Press Enter Character to enter the selected character and go to the next character position 135 Menu Operation Press SAVE LOAD to display the New Folder menu New Folder External Storage New New Foler Softkey Options Description Enter the selected Enter character and go to the Character 8 next character position Delete Delete the selected Character character Save Save the new folder 5 sees Return to the New menu 136 Menu Operation Press SAVE LOAD the Rename menu Rename Enter Character Delete Character OK D External Storage Rename to display Softkey Options Description Enter the selected Enter character and go to the Character a next character position Delete Delete the selected Character character Rename the selected file OK or folder Return to the EXTERNAL menu 137 Menu Operation Press SAVE LOAD the Delete menu Delete OK Cancel 5 External Storage Delete to display
43. d Press Y Mask softkey and then rotate the entry knob to setup the vertical threshold Press Creat Mask softkey to update the thresholds Press 9 softkey to return to the PASS FAIL menu 164 Quick Start Guide Press More 1 2 softkey to display the PASS FAIL menu page 2 2 Press Msg Display softkey to display the Pass Fail measurement results on the top left corner of the screen Press the Output softkey to set how to output the measurement results Press More 2 2 to display the PASS FAIL menu page 1 2 Press the Operate softkey to start PASS FAIL measurement Source CHI Operate setup Mask More H 26Gus 165 Quick Start Guide 5 6 Using Waveform Recorder Waveform recorder lets you record waveforms playback waveforms and save the waveforms Perform the following steps to record waveforms Press the ACQUIRE key to display the ACUQIRE menu Press the RECORD softkey to display the RECORD menu Press the Mode softkey to select Record mode Press the Source softkey to select the source channel CH1 Press the Operate key to start recording and the total recorded frame count will be displayed on the top left screen Press the Operate key again to stop recording 166 Quick Start Guide GET ha gt RECORD 38 Perform the following steps to playback the waveforms Press the ACQUIRE key to display the ACUQIRE menu Press the RECORD softkey to display the RECORD m
44. ed The channel menu of a channel must be displayed first before you can turn off the channel For example suppose CH1 and CH2 are both displayed and the CH2 menu is also displayed In order to turn CH1 off you should press the CH1 key first to show CH1 menu on the display then press CH1 key again to turn off CH1 CH1 CH2 Menu Press the channel key CH2 to display the channel s menu and turn on the channel display Channel Coupling Press the channel key CH2 then press the Coupling softkey to select AC coupling mode AC coupling places a high pass filter in series with the input signal that blocks the DC component of the input signal AC coupling is useful for viewing waveforms with large DC offsets 33 Basic Operation Trig d CH2 Coupling AC Eee Coupling OFF Probe Digital Filter M 566us AC Coupling Status AC Coupling Press the channel key EHS then press the Coupling softkey again to select DC coupling mode DC coupling passes both AC and DC components of the input signal DC coupling is useful for viewing low frequency waveforms that do not have large DC offsets 34 Basic Operation Trig d CH2 Coupling DC mmea Coupling OFF Probe Digital Filter More 1 2 M 566us DC Coupling Status DC Coupling Press the channel key CH then press the Coupling softkey until GND coupling is selected GND mode blocks both AC and DC componen
45. ed the SINGLE key will no longer be lid and the IRUN STOP key will illuminate in red 159 Quick Start Guide 5 3 Reduce Random Noise on a Signal If the test signal is noisy you can set up the oscilloscope to reduce the noise on the displayed waveform First you stablize the displayed waveform by removing the noise from the trigger path Second you reduce the noise on the displayed waveform 7270 0000s T LLZ Connect a signal to the oscilloscope Press AUTO key to display the signal quickly Press the Trigger MENU key to display the TRIGGER menu 160 Quick Start Guide Press Type softkey to select Edge trigger type Press Trigger Setup softkey to display the trigger SETUP menu Press Coupling softkey to select HF Reject or LF Reject coupling mode to reduce the noise from the trigger channel Press the ACQUIRE key to display the ACQUIRE menu Press the Mode softkey to select Average mode Rotate the entry knob CH to set the number of averages that best eliminates the noise from the displayed waveform CET ha 161 Quick Start Guide 5 4 Triggering a Video Signal Video trigger can be used to capture the standard video signals The trigger circuit detects the vertical and horizontal interval of the waveform and produces triggers based on the Video trigger setting you have selected Trigger on Odd or Even Fields of the Video
46. enu Press the Mode softkey to select Play back mode Press Play Mode softkey to select C P or P E mode Press the More 1 2 softkey to display the RECORD menu page 2 2 Press Start Frame softkey and turn the entry knob to set the start frame Press End Frame softkey and turn the entry knob to set the end frame 167 Quick Start Guide Press Interval softkey and turn the entry knob to set the interval time Press the More 2 2 softkey to display the RECORD menu page 1 2 Press Operate softkey to playback the waveform RECORD Mode Play back Operate More M 266us 168 Quick Start Guide Perform the following steps to save the waveform recorded Press the ACQUIRE key to display the ACUQIRE menu Press the RECORD softkey to display the RECORD menu page 1 2 Press the Mode softkey to select Save Recall mode Press Start Frame softkey and turn the entry knob to set the start frame Press End Frame softkey and turn the entry knob to set the end frame Press the Internal Storage softkey to Save or Load the recorded waveform from the internal memory 169 Quick Start Guide 5 7 Making Cursor Measurements You can use the cursors to quickly make time and voltage measurements on a waveform You can use the cursors to measure the amplitude and frequency of a FFT waveform You can also use the cursors to measure the phase difference between two signals with the same frequency
47. ertical scale and coupling Differential delay settings are identical TI Bandwidth reduced to 6 MHz with a 1X probe Horizontal system Time base range 2 ns div to 50 s div 1 2 5 step Modes Main Delayed Roll and X Y Time base accuracy 0 01 Channel 1 is the horizontal X axis input Input of X Y mode Channel 2 is the vertical Y axis input 60 MHz 2540B Bandwidth of X Y mode 100 MHz 2542B Phase error of X Y mode 3 189 Measurements Specifications Voltage measurement Max Min VPP High Low Amplitude Average RMS Overshoot Preshoot Cycle average Cycle RMS Time measurement Frequency Period Rise time Fall time Width Width Duty Duty Delay Phase X MAX X MIN Math A B A B AxB FFT 1024 points Cursors Manual Auto and Track Built in 5 digit frequency counter Count up to Counter the oscilloscope s maximum bandwidth 190 Trigger system Specifications Source CH1 CH2 EXT EXT 5 AC Line Alternating Modes Auto Normal Single Coupling DC AC LF Reject HF Reject Type Edge Pulse Video Trigger level range Trigger sensitivity Internal 8 divisions from screen center EXT 1 6V EXT 5 8 V 0 1 div to 1 0 div user adjustable EXT input impedance 1 MO 18 pF EXT maximum input 400 Vox 1 MO Video Standard Holdoff Range Supports NTSC PAL and SECAM broadca
48. ess MEASURE key again to display the MEASURE menu Press Time softkey to display the TIME menu Press the Frequency softkey to measure the frequency The frequency value will be displayed at the bottom of the screen to the right of the voltage value 157 Quick Start Guide 5 2 Capture Single Shot Signal Digital Storage Oscilloscope can easily be used to capture a single shot or unrepeatable signal Perform the following steps to capture a single shot signal Connect the channel 1 probe to the unknown signal Press the trigger MENU key to display the TRIGGER menu Press the Source softkey to select CH1 Press the Mode softkey to select the Auto trigger mode Adjust the vertical and horizontal controls to observe the the signal roughly And find out the right Trigger Type and Trigger mode Press the Type softkey from the TRIGGER menu page to select Pulse trigger type Press More 1 2 sofkey to display the TRIGGER menu page 2 2 Press Mode softkey to select Normal Trigger mode Press More 2 2 sofkey to display the TRIGGER menu page 1 2 Press Pulse Mode softkey to select T lt positive less than Rotate the entry knob 4 to set up the pulse width 158 Quick Start Guide Press the SINGLE key to start the acquisition system and search for the trigger condition The SINGLE key will be illuminated in orange When trigger condition is met the captured waveform will be display
49. ey to display the DISPLAY menu page 2 2 DISPLAY Softkey Options Description Grid Display both grids and axes Brightness Turn off the axes Grid H Turn off the grids Turn off both grids g g and axes Adjust the brightness Brightness CO i of the grids Color Select Color scheme Setup Menu A7 Adjust the menu Display display time Display menu page More 2 2 pag 148 Shortcut Menu 4 SHORTCUT MENU e CUSTOM Button e MEASALL Button e RECORD Button e COUNTER Button 149 Shortcut Menu 4 1 Shortcut Controls Shortcut a These four shortcut keys provide alternate quick access to some most frequently used functions or menus CUSTOM Button The Custom button allows the user to assign a shortcut from a list of menu categories as its function upon pressing it The button serves two functions To assign shortcut and to be used as a shortcut key Before it can be used as a shortcut the user must first enable and setup a shortcut for it from within the custom button menu 150 Shortcut Menu Custom Button Menu To enter the custom button menu press and hold down the Custom key for two seconds or until the custom menu shown below displays on screen CUSTOM Softkey Options Description Enable Enable custom ON ON shortcut key Enable Disable custom OFF Shortcut shortcut key Assign shortcut to a selected sub menu Shortcut category
50. f the cursors can be moved by turning the entry knob CO Cursor Menu key The oscilloscope provides three kinds of cursor measurement modes Manual Auto and Track 140 Menu Operation Manual Mode Voltage Cursor Measurement In the manual mode you can move the cursors to measure the voltage or time on the select source waveform Press CURSOR Mode to display the CURSOR menu and select the Manual mode Press the Type softkey to select Voltage measurement SEKR Softkey Options Description Mode Manual Manual cursor measurement t Manual SC Mode Auto Auto cursor measurement Track Track cursor measurement Type CH1 Measure CH1 voltage Source CH2 Measure CH2 RRC MATH Measure MATH BEI Voltage Measure voltage value DS TI 2 00 Time Measure time value Press this softkey to select Y1 Y2 or both Y1 and Y2 OY1 cursors for adjustment VC Current voltage values for Y1 and Y2 are displayed in the softkey or on the top right 141 Menu Operation corner when menu is off AY Displays the difference value between Y1 and Y2 cursors Time Cursor Measurement Press CURSOR Mode to display the CURSOR menu and select the Manual mode Press the Type softkey to select Time measurement CURSOR Mode Source Type 6 BAUS t 6 406us 12 Bus 23 33kHz Softkey Options Description Ma
51. ging and contact B amp K Precision immediately if something is missing 1 3 Input Power Requirements The 2540B and 2542B DSOs do not require a line fuse when different voltage lines are used for powering the instrument The power input requirements are Input Voltage Range 99 V to 242 VAC Input Frequency 47 Hz to 440 Hz Rating 50VA Max 15 Getting Started Before connecting the instrument from an AC outlet please verify that the above power input requirements are met Connecting incorrect AC power input to the instrument is dangerous and may damage the instrument voiding its warranty 1 4 Panel and Screen Display Front Panel Display Zoe BG OG OGO GG OOOO OO bottom 16 SE alt ee eo Ne en ch sch a N O 13 14 15 16 17 18 19 20 21 22 Getting Started Power ON OFF button top panel LCD display screen Carrying handle top panel Menu ON OFF button Adjustment knob AUTO SET button UTILITY amp SAVE LOAD menu buttons MEASURE amp CURSOR menu buttons ACQUIRE amp DISPLAY menu buttons RUN control SINGLE amp RUN STOP buttons TRIGGER controls Shortcut buttons amp Local key Alternate function of COUNTER button used to set unit to local mode when in remote mode HORIZONTAL controls EXT TRIG BNC terminal Channel 2 BNC input VERTICAL controls Channel 1 BNC input FUNCTION buttons for soft panel menu PRINT b
52. gnal source to CH1 press the horizontal MENU key and then press the Delayed softkey to enter the Delayed mode You can also press the horizontal scale 59 Basic Operation control knob key to toggle between Main and Delayed mode directly Delayed Window Sweep Area Main Delayed Main F Window Delayed Rall Sweep Window g More Delayed Sweep Time Base Delayed Horizontal Mode 60 Basic Operation X Y Horizontal Mode X Y mode changes the display from a volts versus time display to a volts versus volts display The time base is turned off CH1 amplitude is plotted on the X axis and CH2 amplitude is plotted on the Y axis You can use X Y mode to compare frequency and phase relationships between two signals X Y mode can also be used with transducers to display strain versus displacement flow versus pressure voltage versus current or voltage versus frequency In order to get a better view of the waveform proper vertical scale should be selected before selecting the X Y mode Use X Y mode to compare two signals with the same frequency and different phase Connect the two signal to CH1 and CH2 respectively Press horizontal MENU key and then X Y softkey to select X Y mode 61 Basic Operation HORIZONTAL Main Delayed x Mode Roll More M 14 6us X Y Horizontal Mode 62 Basic Operation Roll Horizontal Mode Roll mode causes the waveform to move slowly
53. igger on EXT 5 CH1 and CH2 Alternating alternately Fo Positive greater than JL Positive equal J Positive within Pulse SS ge T lt Positive less than Mode Lp Negative greater than T Negative equal Le Negative within Basic Operation LE Negative less than Pulse D Set the pulse width Setup More 1 2 Sg Select page 2 2 Press trigger control MENU key to display the TRIGGER menu press Type softkey to select Pulse trigger and then press the More 1 2 softkey to display TRIGGER menu page 2 2 seen Softkey Options Description LL Video Video triggering t Pulse z Type Edge Edge triggering vIoge Pulse Pulse width triggering Trigger Trigger even without a P Auto Setup valid event Mode Trigger only on a valid Normal EPR event 2 2 Trigger Select trigger SETUP Setup menu More 2 2 Select page 1 2 74 Basic Operation Video Trigger Choose video triggering to trigger on the odd fields even fields or on all the lines of a NTSC or PAL SECAM video signal Press trigger control MENU key to display the TRIGGER menu then press Type softkey to select Video trigger TRIGGER Type Source Polarity Softkey Options Description Video Video triggering Type Edge Edge triggering Pulse Pulse width triggering CH1 Trigger on
54. ime More 1 5 Time to display the TIME menu page Softkey Options Description Frequency Frequency is defined as 1 period of the first cycle Period Period is the time period of the first complete waveform cycle Rise Time Rise Time is the time that the first positive leading edge takes to rise from 10 to 90 of its amplitude Fall Time Fall Time is the time that the first negative trailing edge takes to fall from 90 to 10 of its amplitude More 1 5 Display menu page 2 5 112 Menu Operation Press More 1 5 softkey to display the TIME menu page 2 5 Softkey Options Description Width Positive Width is the time between the 50 amplitude points of the first positive pulse Width Negative Width is the time between the 50 amplitude points of the first negative pulse Duty Positive Duty is the ratio of the first positive width to its period expressed as a percentage Duty Negative Duty is the ratio of the first negative width to its period expressed as a percentage More 2 5 Display menu page 3 5 113 Menu Operation Press More 2 5 softkey to display the TIME menu page 3 5 TIME Delayl 24 Delaylf 2q Jk Delaylf 24 TL Delaylf 2 DR Delaylt 24 Delaylt 24 More 375 Softkey Options Description Delay F24 The time between the 50 amplitude
55. imum voltage gt 10 mVpp 0 5 duty and minimum frequency gt 50 Hz Maximum total number of points can only be extracted via remote control using the USB RS232C or LAN interface 193 Specifications Display system Display 5 6 inch TFT LCD display Resolution 234 vertical by 320 horizontal pixels Colour 24 bit true color Brightness Adjustable Simplified Chinese Traditional Chinese English Language Korean Japanese Russian French Spanish Persian Portuguese Menu ON 8 vertical by 10 horizontal divisions or 200 vertical by 250 horizontal pixels Display area Menu OFF 8 vertical by 12 horizontal divisions or 200 vertical by 300 horizontal pixels Display mode Vector Dots Interpolation Sinx x Linear Persistence OFF Infinite persistence 194 Specifications 8 2 General Specifications Power and environmental requirments Line voltage Range 99 V to 242 VAC Line frequency 47 Hz to 440 Hz Power consumption Less than 50 VA Operating temperature 0 C to40 C Non operating temperature 20 C to 55 C Maximum relative humidity 80 for Humidity temperatures up to 31 C decreasing linearly to 50 relative humidity at 40 C Operating altitude lt 3000m Non operating altitude lt 15000 m Physical size and Weight Instrument height 156 5 mm Instrument width 320 mm Instrument depth 123 mm Net weight Approximately 2 8 kg
56. 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 BK EAICIAAI S E 9 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2011 B amp K Precision Corp Printed in China v113011
57. indow Vertical scale in dBV dBV RMS Scale RMS V RMS Vertical scale in V RMS More 1 2 Select page 2 2 48 Basic Operation Press softkey More 1 2 to display FFT menu page 2 2 FFT Operate Display Mode More Softkey Options Description A B Add A and B A B Subtract B from A Operate AXB Multiply A by B FFT Access FFT menu HP a Vertical scale control Hit a Vertical position control Split Split the display into Main Display Screen and Math sections Mode Full Display Math waveform in Screen full screen More 2 2 Select page 1 2 49 Basic Operation Example Select CH1 as the Source for FFT select Rectangular Window set Scale to dBV RMS and then the FFT waveform will look like below You can also measure the amplitude and frequency of the corresponding point with the manual cursors See CURSOR Menu Screen Center Frequency FFT Status H 5aGus Sample Rate FFT Spectrum Analysis 50 Trig d FFT Operate Source Window Scale dBY AMS More REF Function Basic Operation The REF function allows users to store and recall a waveform as a reference signals from different systems This is useful for comparing and analyzing Press RER channel key to turn on the REF menu page 1 2 Softkey Options Description CH1 Save CH1 as reference Source CH2 Save CH2 as reference Ql
58. ire wavefor More 2 4 Display menu page 3 4 108 Menu Operation Press More 2 4 softkey to display the VOLTAGE menu page 3 4 vershon More Softkey Options Description Cycle Avg Cycle Avg value is the sum of the samples divided by the number of samples over one period Cycle RMS Overshoot Cycle RMS value is the true Root Mean Square voltage over one period Overshoot value is distortion that follows a major edge transition expressed as a percentage of amplitude Preshoot Preshoot value is distortion that precedes a major edge transition expressed as a percentage of amplitude More 3 4 Display menu page 4 4 109 Menu Operation Rising Edge Overshoot MENS 100 Amplitude Falling Edge Overshoot DDT x 100 Amplitude Overshoot Overshoot Low Mi Rising Edge Preshoot x100 Amplitude Max High Falling Edge Preshoot 283 x 100 Amplitude Preshoot Preshoot 110 Menu Operation Press More 3 4 softkey to display the VOLTAGE menu page 4 4 Wears Softkey Options Description Return to the MEASURE 5 SC menu More 4 4 Display menu page 1 4 Time Measurements RiseTime FallTime Rei lt ei W La Width de Width e Period _ Time parameter definitions 111 Menu Operation Press IMEASURE 1 5 TIME t ei dn CH A Fall T
59. ition of the power switch when instrument is OFF This symbol is a power switch located at the top of the oscilloscope Pressing this button toggles the oscilloscope s state between power on and power off mode CAT IEC Measurement Category I 400V Inputs may be connected to mains up to 400 VAC under Category overvoltage conditions Environmental Conditions Operating 0 C to 40 C Environment Storage Humidity 0 80 R H Storage Environment 20 C to 50 C Pollution degree Pollution degree 2 Notations TEXT Denotes buttons on the oscilloscope Text Denotes softkeys from the menu system selectable by pressing corresponding menu softkey buttons 8 Table of Contents 1 GETTING STARTED sieve ccctecciiccciecccteecistentictctetiniccnivcs 13 1 1 lege e lee e WE 14 1 2 Package Content 15 1 3 Input Power Requirements eeeeees 15 1 4 Panel and Screen Display 16 Front Panel Display 16 Back Panel Display cccccceeececeensteeeeenneeeceenneeeeeennees 18 LCD Main Screen Display 19 1 5 elle ee EE 21 Power ON Check 21 Basie Chek west tenes ase eile enh sia ia aa 22 1 6 Probe Safety e eege 24 1 7 Probe Attenuaton EEN 25 1 8 Probe Compensaton 25 2 BASIC OPERATION eege see hgeeger ek seen 27 2 1 Using Quick Help 28 22 Using AULOSEL EE 29 SA Vertical COptolg 5 sesieutgeekertgecieek gek ec rnrn 31 Vertical Position Knob CH1 CH 31 Vertical S
60. izontal mode Trigger Controls 65 Basic Operation Trigger Control MENU key Press the trigger control MENU key to show the TRIGGER menu and then press the Type softkey to select Edge Pulse or Video Set to 50 key Press the 50 key to set the trigger level to the 50 amplitude level of the trigger source waveform Force Trigger key Press the FORCE key to force an immediate trigger event even in the absence of a signal This function is useful in following situations If you do not see a waveform on the screen when using Normal trigger mode press the FORCE key to acquire the signal baseline to verify that it is on the screen After you press the SINGLE key to set up for a single shot acquisition you can press the FORCE key to test and verify the control settings Trigger Level Control Use the trigger level control knob to adjust the trigger level When you change the trigger level a horizontal red line temporarily appears to show you the level position on screen 66 Basic Operation After the line disappears the trigger level is marked with a small left arrow Auto and Normal Trigger Modes Press the trigger MENU key to display the TRIGGER menu and press the Mode softkey to select Auto or Normal trigger mode Auto mode Use the auto trigger mode for signals other than low repetitive rate signals and for un
61. known signal levels To display a DC signal you must use Auto trigger mode since there is no edge to trigger on When you press RUN STOP key to start acquiring the oscilloscope first fill the pre trigger buffer It starts to search for a trigger after the pre trigger buffer is filled and continues to flow data through this buffer while it searches for the trigger While searching for the trigger the oscilloscope overflows the pre trigger buffer the first data put into the buffer is the first pushed out When a trigger is found the pre trigger buffer will contain the events that occurred just before the trigger If no trigger is found the oscilloscope generates a trigger and displays the data as though a trigger had occurred In this case the background of the Auto indicator at the top of the 67 Basic Operation display will flash indicating that the oscilloscope is force triggered When you press the SINGLE key the oscilloscope will fill the pre trigger buffer and continue to flow data through the pre trigger buffer until the Auto trigger overrides the search and forces a trigger At the end of the trace the oscilloscope will stop and display the results Normal mode Use Normal trigger mode for low repetitive rate signals or when Auto trigger is not required In Normal mode the oscilloscope must fill the pre trigger buffer with data before it will begin searching for a trigger event While searching for the
62. lly 183 Troubleshoot Guide 7 2 General Problems If there is no display on the screen e Check that the power cord is connected to the oscilloscope and to a live power source e Check that the power switch is on If there is no waveform displayed e Check that the oscilloscope probe is securely inserted into the connector assembly and that the probe clips make good contact with the probe lead wires e Check that the probe clips are securely connected to points in the circuit under test and that the ground is connected e Check that the circuit under test is powered on e Press the AUTO key again If the waveform display is not stable Check that the trigger source channel is actually the channel to which the trigger signal is connected Check that the proper trigger type is selected Video type is only used to trigger a Video signal Proper trigger type is essential to acquire a stable display Try to use the HF Reject or LF Reject to reduce the noise of the trigger signal 184 Troubleshoot Guide If the amplitude is not identical with the actual voltage e Check that the attenuation factor of the probe is identical with the attenuation factor set in the channel menu If instrument is not connected over LAN e Try using DHCP if not already e Reboot the instrument then try again How do extract the deep memory from the DSO e This can only be extracted using provided PC soft
63. local mode will unlock all front panel keys allowing users to resume front panel operation 153 Quick Start Guide 5 QUICK START GUIDE e Application Examples Making Simple Measurements Capture Single Shot Signal Reducing Random Noise on a Signal Triggering a Video Signal Pass Fail Measurement Using Waveform Recorder Making Cursor Measurements 155 Quick Start Guide 5 1 Make Simple Measurements This section provides instructions for measuring the amplitude and frequency of an unknown signal on CH1 Perform the following steps to quickly display the signal Connect the channel 1 probe to the unknown signal Press the AUTO key The oscilloscope automatically sets vertical horizontal and trigger controls You can adjust any of these controls manually if you need to optimize the display of the waveform When you are using both CH1 and CH2 channels the Autoset function sets the vertical controls for each channel and uses the CH1 channel to set the horizontal and trigger controls The oscilloscope can take automatic measurements of the displayed signals Perform the following steps to measure signal amplitude and frequency Press the MEASURE key to display the MEASURE menu Press the Voltage softkey to display the VOLTAGE menu 156 Quick Start Guide Press the Amplitude softkey to measure the Amplitude The amplitude value will be displayed at the bottom of the screen Pr
64. m 146 4 SHORTCUT MENU ssocgcccsstsccevencicecncasisacsentzeasietessacaaces 149 4 1 Shortcut Controls ege eka 150 CUSTOM BUTTON edersen E egies tees 150 MEASALL Gupon a 152 RECORD Gutton ERA 153 COUNTER LOCAL ButtOn u ceesccccesssteceesteeesenteeeees 153 5 QUICK START GUIDE wicnicnn echinacea 155 5 1 Make Simple Measurements nnee0n00nnne 156 5 2 Capture Single Shot Signal ee 158 5 3 Reduce Random Noise on a Signal 160 5 4 Triggering a Video Gong 162 5 5 PASS FAIL Measurement ssnsnnneeeeeeennee 164 5 6 Using Waveform Recorder esssseeeeeesseeenne 166 5 7 Making Cursor Meaeurements 170 6 REMOTE CON TROD cris cicieacstesccncttcstereateteverstenteae eee 177 6 1 Comsoft Goftware ANEN 178 6 2 Web Browser Gul gett ieegegetee geet sd 178 7 TROUBLESHOOT GUIDE cccccetteeeeeseeeeseeeeeeeees 179 7 1 System MGSSAGC wet scecceticineecrdtiwerioecies 180 7 2 General broblems nnna 184 8 SPECIFICATIONS we soc acess ege EES 187 8 1 Digital Storage Oscilloscope Specifications 188 8 2 General Specifications cc cee 195 8 3 Certificati EE 196 Appendix A Performance Verification Procedure 197 DG Gain ACCUIAGY x6 saison tasg lve deidaceearencvedeidactanide 198 Bandwidth EE 200 Trigger Sensitivity E 201 Time Scale Accuracn ENNEN 202 Appendix B Disabling Auto Functton en 203 12 Getting Started 1 GETTING STARTED e Introduction e
65. m feed thru connector If recommended calibrator is not available connect alternative equipment as follows Oscilloscope Calibrator or Signal 2 On the oscilloscope the time base is switched to the sweep speed under test 3 Setup a 10 MHz sine wave output from calibrator 4 Press the Auto waveform button on oscilloscope to get a stable 5 Press the Measure button soft key Time and then soft key Frequency 6 Press the Acquire button and soft key Mode to set Average mode 7 Adjust average to 8 It should read 10 MHz Switch sweep speed to 100 ms or 200 ms to have a stable frequency reading This reading should be less than 1 kHz 202 Disabling Auto Function Appendix B Disabling Auto Function The oscilloscope 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 203 AC coupling 33 Acquisition status 20 attenuation 25 Autoset 29 Band block filter 40 bandwidth limit 36 Cursors 140 DC coupling 34 Delayed 59 Edge Trigger 71 even fields 75 FFT 48 filters 40 Force Trigger 66 Frequency Counter
66. n press the Main softkey to select the main horizontal mode 57 Basic Operation 4 a CA Trig d 5 Main Horizontal Mode Readout shows the delay time or the trigger location within the record data relative to the time reference point 7 The square brackets show the location of current display window within the record data Trigger position within the record data Trigger position on the current waveform display window Main time base 58 Basic Operation Delayed Horizontal Mode Delayed horizontal mode is an expanded version of main mode When Delayed mode is selected the display divides in half The top half of the display shows the normal waveform and bottom half displays the delayed waveform Delayed waveform is a magnified portion of the normal waveform You can use delayed waveform to locate and horizontally expand part of the normal waveform for a more detailed analysis of signals The area of the normal display that is expanded is marked on each end with a vertical shaded area The unshaded area shows what portion of the normal waveform is expanded in the lower half To change the time base for the delayed window turn the horizontal scale knob As you turn the knob the time base for the delayed window is displayed just above the main time base To change the time base for the normal window press the Main softkey then turn the horizontal scale control knob Connect a triangle si
67. nual Manual cursor measurement Mode Auto Auto cursor measurement Track Track cursor measurement CH1 Measure CH1 Source CH2 Measure CH1 MATH Measure MATH Voltage Measure voltage value Type Time Measure time value Press this softkey to select X1 X2 or both X1 and X2 cursors WEIS D for adjustment VW Current time values for X1 and X2 are displayed in the softkey 142 Menu Operation or on the top right corner when menu is off AX is the time difference value AX between X1 and X2 cursors 1 AX 1 AX is the frequency between X1 and X2 Track Mode Two cross hair cursors are displayed on the screen in the track mode The cross hair cursors track the waveform automatically You can move the cross hair cursors horizontally by turning the entry knob CH The X Y values of each cross hair cursor are displayed in the softkey area or on the top right corner of the display when menu is off 143 Press CURSOR Mode Cursor A Cursor B Menu Operation CURSOR Mode to display the CURSOR menu and select the Track mode Softkey Options Description Manual Manual cursor measurement Mode Auto Auto cursor measurement Track Track cursor measurement CH1 Track CH1 with Cursor A Cursor A CH2 Track CH2 with Cursor A None Turn off Cursor A CH1 Track CH1 with Cursor B Cursor B CH2 Track CH2 with Cursor B None Turn off Cursor B Press this
68. o horizontal timebase horizontal position vertical scale vertical position and trigger position 132 Menu Operation External Storage Press SAVE LOAD EXTERNAL menu EXTERNAL Rename Load Delete ke gt External Storage to display the Softkey Options Description Create a new file or folder in New the external memory Rename the current file or Rename folder Load Load the current file Delete the current file or Delete folder 5 Return to the SAVE LOAD menu Note The External Storage menu and operations will not be available unless an external USB flash drive is connected and installed 133 Menu Operation Press SAVE LOAD External Storage New to display the New menu New Softkey Options Description vS New File none Display the New File menu New Display the New Folder Covey Folder WW menu Return to the EXTERNAL gt D menu 134 Menu Operation Press SAVE LOAD External Storage New New File to display the New File menu Softkey Options Description Setups Save as setup files Traces Save as trace files Waveforms Save as waveform files Save as BMP 8bit Save as 8 bit BMP files BMP 24bit Save as 24 bit BMP files CSV Save as CSV files Enter the selected Enter character and go to the Character D next chara
69. on Pass PASS waveforms Output and alarm on Pass pass amp 7P Output waveforms FAIL Output on Fail waveforms Output and alarm on Fail FAIL P waveforms ON Stop sampling on output Stop on Continue sampling on Output OFF output Return to the UTILITY menu Display the menu page More 2 2 ES ES 1 2 is selected 102 Pass Fail function is not available when X Y mode Setup Mask Menu Operation Press UTILITY MASK menu 1 2 8 4Gdiv Y Mask 6 46div Create Mask More Pass Fail Setup Mask to display the Softkey Options Description X Mask UN Set horizontal tolerance Y Mask UN Set vertical tolerance Create Create the PASS FAIL Mask D tolerance mask Return to the gt PASS FAIL menu More TA Gen Display the menu 2 2 103 Menu Operation Press More 1 2 to display the MASK menu 2 2 Storage Softkey Options Description Store the PASS FAIL Internal tolerance mask to Storage internal memory Store the PASS FAIL External tolerance mask to Storage external USB mass storage device 5 Return to the PASS FAIL menu Display the menu page More 2 2 pay pag 1 2 104 Menu Operation 3 2 MEASURE Menu MEASURE Menu key 105 Menu Operation Press MEASURE MEASURE Source CHI voltage Time Clear Measure all OFF menu key to display the M
70. pping 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 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 Corp 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
71. robe Attenuation Digital Filter More M 26Gus Vertical Scale Set Probe Attenuation Factor to 1X 39 Basic Operation Digital Filter Each channel has built in digital filters that can be applied to the connected signal Press the channel key CH then press the Digital Filter softkey to display the FILTER CH1 menu Four kinds of filter types are available a f Low pass filter LG High pass filter tf Band pass filter Hcf Band block filter Po Ji Press the Upper Limit or Lower Limit softkey and then adjust the Entry knob CO to set the high and or low frequency range for the filter 40 Basic Operation BWW COFF Digital Filter OFF Digital Filter is off Zon ix Digital Filter ON M 2 6us Filter Status Digital Filter is on 41 Basic Operation Vertical Scale Turn the large vertical scale knob below the channel key to set the scale factor for the channel The channel scale factor value is displayed in the bottom left portion of the display Press CH2 More 1 2 Volts Scale to select Coarse or Fine adjustment You can also press the large vertical scale knob to toggle between Fine and Coarse When Coarse is selected the vertical scale knob changes the channel scale in a 1 2 5 step sequence When Fine is selected the vertical scale knob changes the channel scale in a smaller resolution Fine Invert OFF M 20 us Fine Value Fine Verti
72. s any channel with a repetitive waveform if it meets the following requirements e Frequency of at least 50Hz e Duty cycle greater than 0 5 e Amplitude of at least 10 mVp p Note Any channels that do not meet these requirements are turned off When you are using more than one channel the Autoset function sets the vertical controls for each channel and uses CH1 to set the horizontal and trigger controls To configure the oscilloscope quickly and automatically to see connected signals press the AUTO key The oscilloscope will take a few seconds to automatically set 29 Basic Operation various parameters If signal is found it will beep once and open the AUTO menu before displaying the signal If there are no signals no beep will occur and a display message will read No signal is found To configure the oscilloscope to display multiple cycles press Multi Cycle softkey in the AUTO menu To configure the oscilloscope to display a single cycle press Single Cycle softkey in the AUTO menu To undo the effects of Autoset press the Undo Autoset softkey in the AUTO menu before pressing any other key This is useful when you have unintentionally pressed the AUTO key or do not like the settings Autoset has selected and want to return to your previous settings Trig d AUTO JUUL ulti Cycle ne Unda Autoset M S5 6us Basic Operation Note Auto set function can be disabled See Appendix B
73. softkey to select Cursor A for adjustment Current OAx tracked X Y axis poent values of Ay S Cursor A are displayed in the softkey or on the top right corner when menu is off Press this softkey to select Cursor B for adjustment Current Bx tracked X Y axis point values of By Cursor B are displayed in the softkey or on the top right corner when menu is off 144 Menu Operation AUTO Mode The Auto mode cursors are displayed only when auto measurement function is enabled The oscilloscope displays the auto cursors corresponding to the latest auto measurement parameter No Auto cursors will be displayed when no auto measurement parameter is selected 145 Menu Operation 3 6 DISPLAY Menu Display Menu key 146 Menu Operation Press DISPLAY page 1 2 menu key to display the DISPLAY menu Softkey Options Description Type Vector Dots Vector mode fills the space between adjacent sample points in the waveform Dot mode only displays the sample points Persist ON The scope updates the waveform without erasing the previous sample points OFF Turn off the persistence function Clear Persistence Press to erase the previous sample points as well as the loaded trace waveform Intensity Adjust the display intensity of waveforms More 1 2 Display menu page 2 2 147 Menu Operation Press More 1 2 softk
74. st systems for any field or any line 100 ns to 1 5s Trigger Level Accuracy Internal 0 3 div x Volts div SET LEVEL TO 50 Operates with input signal 2 50 Hz Pulse Width Trigger mode Trigger when Less than Greater than Equal Positive pulse Negative pulse Pulse Width Range 20 ns to 10s 191 Storage and UO Specifications Internal memory 10 setups and trace files can be saved and recalled internally External storage file format Setup file STP Waveform file WFM Trace file TRC BMP file BMP CSV file CSV Standard ports USB host USB device RS232C PASS FAIL OUT LAN Maximum data points that can be stored into a CSV file on an external USB storage device is 1200 points 192 Acquisition system Specifications Max real time sample rate 2540B 2542B 1 GSa s Max equivalent sample rate 2540B 2542B 50 GSa s Max Memory Depth Based on Sample rate 1 GSa s 16 kpts 500 MSa s 8 kpts dual channel 500 MSa s 2 4 Mpts single channel lt 250 MSa s 1 2 Mpts single and dual channel operation Vertical resolution 8 bits Sample mode Normal Average Peak Detect Autoset Finds and displays all active channels sets edge trigger mode on channel 1 set vertical sensitivity on scope channels and time base to display one or five periods Requiires min
75. t 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 acceptable voltage can destroy the instrument 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 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 unsorted municipal waste Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements Safety Symbols Se A A O Chassis or earth ground symbol This symbol on an instrument indicates caution For details the user should refer to the operating instructions in the manual Electrical Shock hazard On Power This is the In position of the power switch when instrument is ON Off Power This is the Out pos
76. t compensation image below The trimmer capacitor is located either on the probe BNC connector or above the probe attenuation switch Correct compensation Over compensated Under compensated 4 Connect probes to channel 2 Repeat the above steps This matches each probe to each channel 26 Basic Operation 2 BASIC OPERATION e Using Quick Help e Using Auto Set e Vertical Controls e Horizontal Controls e Trigger Controls e Run Control 27 Basic Operation 2 1 Using Quick Help The digital storage oscilloscope has a quick help system that provides a description of functionality for each front panel keys and soft panel keys Press and hold down the key or the softkey that you want to see help description for The help information will display and remain at the center of the screen as shown below until another key is pressed or a knob is turned Note Quick help is not available for CUSTOM shortcut key Refer to CUSTOM Button section for details on its usage Basic Operation If there are more than one page of help information press the key lt P to browse the previous or next pages 2 2 Using Autoset The 2540B 2542B oscilloscopes provide an Autoset function which sets the vertical horizontal and trigger controls automatically for optimal display of the signal s connected at either or both CH1 and CH2 Autoset function detects turns on and scale
77. the LCD screen Test Check the key and Key Test Jess l control operation Return to the UTILITY menu 99 Menu Operation System Information Press UTILITY Service to display the Service menu and then press the System Info softkey to display the system informations such as Model Serial number Power up times Software version and a list of installed modules OS Dese System Info B amp K Precision Corroration Model Screen Test Power up times Software version Key Test System Information 100 Menu Operation Pass Fail The oscilloscope first measures the input source signal and compares it with Pass Fail settings and then outputs the Pass Fail result Press UTILITY Pass Fail to display the PASS FAIL menu 1 2 Softkey Options Description ON Pass Fail function on Enable Test a OFF Pass Fail function off on CH1 Source signal CH1 CN Source eee Operate CH2 Source signal CH2 gt Start Pass Fail test Operate Setup Mask E Stop Pass Fail test average Setup Mask aes Set up the regulations a More 1 2 Display the menu 2 2 101 Menu Operation Press More 1 2 to display the PASS FAIL menu 2 2 Msg Display Output Stop on Output D More Note Softkey Options Description Pass Fail count message ON Msg on Displa Pass Fail count message OFF J off Output
78. to 500 ns div 3 Turn on output of the calibrator for a 1 MHz sine wave 4 Change the output level of calibrator until waveform height is 6 divisions and reading is 30 mVp p 5 Record these values as a reference value Slowly increase frequency output of calibrator up to rated bandwidth of the oscilloscope 7 Observe waveform and reading on screen The size of the waveform should always be 2 4 2 divisions and reading should always be 2 21 2 mV 8 Repeat the above steps for CH2 200 Performance Verification Procedure Trigger Sensitivity Equipment needed Fluke calibrator preferred or signal generator 1 Connect your calibrator s output to CH1 of the oscilloscope by 50ohm feed thru connector Oscilloscope Calibrator or Signal Generator 2 Set input attenuation of CH1 to 10 mV div 3 Turn on output of the calibrator for a 10 MHz sine wave 4 Change output level until waveform reaches 1 division on the screen The waveform should be stable and clear 5 Set calibrator to rated bandwidth frequency of the oscilloscope 6 Change output level of calibrator to the specified vertical division 1 5 div from 10 MHz to full bandwidth The waveform should be stable and clear 7 Repeat the above steps for CH2 201 Performance Verification Procedure Time Scale Accuracy Equipment needed Fluke calibrator preferred or signal generator 1 Connect your calibrator s output to CH1 of the oscilloscope by 50oh
79. trigger the oscilloscope overflows the pre trigger buffer the first data put into the buffer is the first pushed out When the trigger event is found the oscilloscope will fill the post trigger buffer and display the results If the acquisition was initiated by IRUN STOP the process repeats If the acquisition was initiated by SINGLE then the acquisition stops In either Auto or Normal mode the trigger may be missed if the oscilloscope s pre trigger buffer is not full yet 68 Basic Operation Holdoff Function Holdoff sets the amount of time that the oscilloscope will wait before re initializing the trigger circuit You can use the holdoff function to stabilize the display of complex waveforms With the holdoff function you can synchronize triggers The oscilloscope will trigger on one edge of the waveform and ignore further edges until the holdoff time is up The oscilloscope will then re initialize the trigger circuit to wait for the next edge trigger This allows the oscilloscope to trigger on a repeating pattern in a waveform Turn the Entry knob to increase or decrease the trigger hold off time shown in the Holdoff softkey To get a stable trigger on the pulse burst shown on the screen set the holdoff time to be slightly less than the period of the pulse burst 69 Basic Operation Trigger Position CA CER Coupling Holdoff Holdoff H 2 66us Holdoff Time Holdoff
80. ts of the input signal and connect the input to the ground level 35 Basic Operation GND See Coupling OFF Probe Digital Filter More 172 M S5 6us GND Coupling Status GND Coupling BW Limit Press the channel key CH2 then press the BW Limit softkey to turn the bandwidth limit on or off for the selected channel 2 When it is off it passes both the high and low frequency components 36 Basic Operation Coupling BW Limit Bandwidth Probe Limit OFF M 266us BW Limit off When it is on the maximum bandwidth for the channel is approximately 20 MHz For waveforms with frequencies below this turning bandwidth limit on removes unwanted high frequency noise from the waveform 37 Basic Operation Trig d CH2 Coupling DW Limit Bandwidth Probe Limit ON Digital Filter More 1 2 M 266us Bandwidth Limit ON Status BW Limit on 38 Basic Operation Probe Attenuation Setting Probes are available with various attenuation factors which affect the vertical scale of the signal You can manually select the factor that matches the attenuation of your probe For example to match a probe set to 10X connected to CH2 press the channel key softkey and select 10X CH2 and then press the Probe Press the Probe softkey again and select 1X when a probe with 1 1 attenuation factor is connected to CH2 Trig 2 Coupling DW Limit OFF Probe P
81. ult value 100 ns 5 Return to the TRIGGER menu Note There will be no coupling menu item when video trigger mode is selected in the trigger SETUP menu 77 Basic Operation The following figures show the video waveforms triggered on odd fields and on a specific line 6 OE EE rk Field SYNC CEN ECS CM ES Trigger on odd fields D M 166us Trigger on specific line 6 78 Basic Operation 2 6 RUN Controls Run Control SINGLE Run controls Press the SINGLE key to execute a single shot acquisition The key will illuminate in orange until the oscilloscope is triggered Press the key to make the oscilloscope start looking for a trigger The IRUN STOP key will illuminate in green When the trigger mode is set to Normal mode the display will not update until a trigger is found If the trigger mode is set to Auto mode the oscilloscope looks for a trigger and if no trigger is found it will be triggered automatically and the waveform of input signals will be shown immediately Press the IRUN STOP key again to stop acquiring data and the RUN STOP key will illuminate in red Now you can pan across and zoom in on the acquired waveform 79 Menu Operation 3 MENU OPERATION e Utility Menu e Measure Menu e Acquire Menu e Save Load Menu e Cursor Menu e Display Menu 80 Menu Operation 3 1 UTILITY Menu Press the UTILITY
82. using the knob Shortcut The available sub menu categories that can be assigned as a shortcut are listed as follows Service Menu IO Setup Print Setup System Setup FFT Trigset Menu Clear Measurement Clears any measurement that are currently displayed at the bottom of the grid e Full Split Screen for Math function only 151 Shortcut Menu Using Custom Button After a shortcut has been assigned and the custom function has been enabled users may now press the CUSTOM key do not hold down the key otherwise the DSO will go back into the Custom menu at any time to go to the assigned shortcut MEASALL Button The MEASALL button is a shortcut key to toggle the display of the all measurement window When pushed it will show all measurements like the screen below H 5 G us 152 Shortcut Menu RECORD Button The RECORD button is a shortcut key that directly enters into the Record sub menu allowing users to quickly adjust settings and begin a signal recording to capture and analyze data COUNTER LOCAL Button The COUNTER button serve two purpose When not in remote mode it functions as a shortcut key to turn on off the hardware frequency counter display When in remote mode it will work as a Secondary function LOCAL which sets the oscilloscope back to LOCAL mode whenever the oscilloscope is in remote mode RMT Setting the oscilloscope to
83. utton Probe compensation terminal USB device port supports most USB flash drives Tilt feet bottom 17 Getting Started Back Panel Display Security loops Carrying handle Power ON OFF button AC line input side panel Pass Fail output isolated LAN interface port RS232 serial interface port USB host interface port Rear rubber feet DP OAN Dart 0 D 0 Ventilation fan side panel 18 Getting Started LCD Main Screen Display The oscilloscope display contains channel acquisitions setup information measurement results and soft keys for setting up various parameters Trig d CHI Coupling BW Limit OFF Probe 7 Digital Filter More M 50 us 1 The USB icon appears when a USB drive is inserted into the front USB device port and ready to be used When instrument is in remote mode it will display Rmt indicator instead 2 Readout showing the trigger position relative to the horizontal center of the screen 19 Getting Started The square brackets show the location of current display window within the whole captured waveform The captured waveform color corresponds with the active waveform color CH1 yellow CH2 cyan Horizontal center position icon shows the horizontal center location within the captured waveform Trigger position icon shows the trigger location within the record waveform Acquisition status AUTO Auto mode STOP Stop acquiring waveform
84. ware It cannot be exported directly to a connected front USB flash drive 185 Specifications 8 SPECIFICATIONS e Digital Storage Oscilloscope Specifications e General Specifications 187 Specifications 8 1 Digital Storage Oscilloscope Specifications All characteristics are typical performance values and are not warranted Characteristics are valid after a 30 minute warm up time and within 5 C of last Self Cal temperature Vertical system Scope channels 2 channels plus external trigger input Bandwidth 60 MHz 2540B 100 MHz 2542B Calculated rise time 0 35 bandwidth lt 5 83 ns 2540B lt 3 50 ns 2542B Coupling AC DC and GND BW Limit 20 MHz selectable DC Vertical Gain Accuracy 2 mV div 5 mV div 4 10 mV div to 5 V div 3 DC Measurement 2 mV div to 5 mV div 4 x reading 0 1 x V div 0 5 mV 10 mV div to 5 V div 3 x reading 0 1 x V div 1 0 mV Position range 8 divisions away from the center of the screen Attenuation factor X1 X10 X100 X1000 188 Specifications Channel common 100 1 at 60 Hz mode rejection 20 1 at 10 MHz Lower frequency lt 5 Hz at BNC limit AC coupled lt 1 Hz when using a 10X passive probe Channel to 2 100 1 at 1 MHz channel crosstalk 100 1 at 10 MHz Input Impedance 1 MQ 18 pF Maximun input 400 Ve 1 MOQ 150 ps when v
85. will be displayed when a parameter can not be measured correctly 119 Menu Operation 3 3 ACQUIRE Menu Press the ACQUIRE menu key to show the ACQUIRE menu ACQUIRE Menu key Press Mode softkey to select Normal mode Neel Softkey Options Description Mode Normal Normal acquisition Mode Average Average acquisition Peak Detect Peak detect acquisition Sampling Equivalent Equivalent sampling Sampling Real Time Real time sampling Record Select Record menu Record Normal acquisition mode yields the best display for most waveforms 120 Menu Operation Average mode lets you average multiple triggers to reduce noise and increase resolution Peak Detect mode should be used to display narrow pulses that occur infrequently It s useful when looking for very narrow pulses at very slow time base Equivalent sampling mode is useful for displaying high frequency repetitive signals Real Time sampling mode is useful to capture the single shot signals 121 Menu Operation Press Mode softkey to select Average mode A es 16 Sampling Record Press Mo de Peak Detect Sampling Record Softkey Options Description Normal Normal acquisition Average Average acquisition Mode Peak Peak detect Detect acquisition Set the average Averages a number to 2 4 8

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