Model: 2540B, 2542B, 2540B-GEN, 2542B-GEN 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.
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.
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 product. 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).
Compliance Statements Disposal of Old Electrical & 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.
Safety Symbols 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 position of the power switch when instrument is OFF. This symbol is a power switch located at the top of the oscilloscope.
CAT I (400V) IEC Measurement Category I. Inputs may be connected to mains (up to 400 VAC) under Category I overvoltage conditions. Environmental Conditions Operating Environment 0 °C to 40 °C 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.
Table of Contents 1 GETTING STARTED ..................................................... 14 1.1 Introduction ..................................................... 15 1.2 Package Contents ........................................... 16 1.3 Input Power Requirements .............................. 17 1.4 Panel and Screen Display ............................... 18 Front Panel Display ..................................................... 18 Back Panel Display ...............................................
2.4 Horizontal Controls ......................................... 55 Horizontal Position Control ...........................................56 Horizontal Scale Control ...............................................56 Main - Horizontal Mode ................................................58 Delayed - Horizontal Mode ...........................................60 X-Y Horizontal Mode.....................................................62 Roll - Horizontal Mode .................................................
External Storage ........................................................ 127 Firmware Update ....................................................... 131 3.5 CURSOR Menu ............................................. 132 Manual Mode ............................................................. 133 Track Mode ................................................................ 135 AUTO Mode ............................................................... 137 3.6 4 DISPLAY Menu .................................
AM Modulation ............................................................168 FM Modulation ............................................................170 Pulse Width Modulation ..............................................172 DC Offset Modulation (DCOM) ...................................174 Frequency Sweep .......................................................176 Burst Frequency .........................................................178 FSK and PSK Modulation .........................................
9 8.1 System Message ........................................... 216 8.2 General Problems ......................................... 220 SPECIFICATIONS .................................................... 223 9.1 Digital Storage Oscilloscope Specifications ... 224 9.2 Arbitrary Waveform Generator Specifications 231 9.3 General Specifications .................................. 236 9.4 Certification ...................................................
Getting Started 1 GETTING STARTED • Introduction • Package Contents • Input Power Requirements • Panel and Screen Display • Quick Check • Probe Safety • Probe Attenuation • Probe Compensation 14
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. The 2540B-GEN and 2542B-GEN models offer the same, with the addition of a built-in arbitrary waveform generator in the same form factor. Features • 60/100 MHz bandwidth (60 MHz: 2540B, 2540B-GEN / 100 MHz: 2542B, 2542B-GEN) • 1 GSa/s sample rate • Bright 5.7” TFT color display • Deep waveform memory up to 2.
Getting Started • LAN and USB device connectivity for remote PC control through Comsoft PC software • USB host port for convenient storing and recalling of waveform data, setups, and screenshots on a USB flash drive 1.
Getting Started 1.3 Input Power Requirements The 2540B, 2542B, 2540B-GEN, and 2542B-GEN 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. Before connecting the instrument from an AC outlet, please verify that the above power input requirements are met.
Getting Started 1.
Getting Started 14 23 Figure 2 - Model 2542B-GEN 1. Power ON/OFF button (top panel) 2. LCD display screen 3. Carrying handle (top panel) 4. Menu ON/OFF button 5. Adjustment knob 6. AUTO SET button 7. UTILITY & SAVE/LOAD menu buttons 8. MEASURE & CURSOR menu buttons 9. ACQUIRE & DISPLAY menu buttons 10.
Getting Started 11. TRIGGER controls 12. (for models 2540B/2542B) Shortcut buttons & Local key (Alternate function of COUNTER button; used to set unit to local mode when in remote mode) (for models 2540B-GEN/2542B-GEN) Function keys to setup arbitrary waveform generator: MENU / GRAPH button FREQ / CAPTURE button AMPL / LOCAL button ON/OFF button 13. HORIZONTAL controls 14. EXT TRIG BNC terminal (For models 2540B-GEN/2542B-GEN) EXT TRIG and MOD OUT BNC terminal 15. Channel 2 BNC input 16.
Getting Started Back Panel Display 2 3 1 4 10 (side) (side) 9 8 1. Security loops 2. Carrying handle 3. Power ON/OFF button 4. AC line input (side panel) 5. Pass/Fail output (isolated) 6. LAN interface port 7. RS232 serial interface port 8. USB device interface port 9. Rear rubber feet 10.
Getting Started LCD Main Screen Display The oscilloscope display contains channel acquisitions, setup information, measurement results, and soft keys for setting up various parameters. 1. The USB icon appears when a USB drive is inserted into the front USB host 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.
Getting Started 3. 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). 4. Horizontal center position icon shows the horizontal center location within the captured waveform. 5. Trigger position icon shows the trigger location within the record waveform. 6. Acquisition status: AUTO – “Auto” mode. STOP – Stop acquiring waveform data.
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&K Precision immediately.
Getting Started 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.
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.
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.
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.
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.
Basic Operation 2 BASIC OPERATION • Using Quick Help • Using Autoset • Vertical Controls • Horizontal Controls • Trigger Controls • RUN Controls 31
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.
Basic Operation If there are more than one page of help information, press the key to browse the previous or next pages. 2.2 Using Autoset The 2540B/2542B/2540B-GEN/2542B-GEN 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.
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.
Basic Operation Note: Auto set function can be disabled. See “Appendix B: 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 ( ) up or down on the display.
Basic Operation Press the vertical position knob to bring the channel’s waveform and its ground level icon ( ) 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.
Basic Operation coarse is selected, the vertical scale knob changes the channel scale in a 1-2-5 step sequence. Channel Keys CH1, CH2 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 illuminated. 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.
Basic Operation AC Coupling Press the channel key CH2, 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.
Basic Operation Press the channel key CH2, then press the Coupling softkey until GND coupling is selected. GND mode blocks both AC and DC components of the input signal and connect the input to the ground level. 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.
Basic Operation 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.
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 CH2, and then press the Probe softkey and select 10X. Press the Probe softkey again and select 1X when a probe with 1:1 attenuation factor is connected to CH2.
Basic Operation Digital Filter Each channel has built-in digital filters that can be applied to the connected signal. Press the channel key CH1, then press the Digital Filter softkey to display the FILTER-CH1 menu. Four kinds of filter types are available: 1. Low pass filter 2. High pass filter 3. Band pass filter 4. Band block filter Press the Upper Limit or Lower Limit softkey and then adjust the Entry knob to set the high and/or low frequency range for the filter.
Basic Operation Digital Filter is on 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.
Basic Operation Fine Vertical Scale 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.
Basic Operation Vertical Invert off Vertical Invert on 45
Basic Operation MATH Functions Dual Waveform Calculation Press MATH channel key to turn on the MATH menu, page ½.
Basic Operation Press softkey More 1/2 to display MATH menu page 2/2.
Basic Operation Example: Select the A+B math function, then select CH1 as the Source A, and select CH2 as the Source B.
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.
Basic Operation Press softkey More 1/2 to display FFT menu page 2/2.
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”).
Basic Operation REF Function The REF function allows users to store and recall a waveform as a reference. This is useful for comparing and analyzing signals from different systems. Press REF channel key to turn on the REF menu, page 1/2.
Basic Operation Press softkey More 1/2 to display REF menu, page 2/2. Softkey Options Invert Description ON REF invert ON OFF REF invert OFF Internal INTERNAL Storage menu Save the reference waveform to the internal memory Save the reference External EXTERNAL Storage menu waveform to the USB mass storage device More 2/2 ---- Select page 1/2 Press REF channel key to turn on the REF menu page 1/2, press softkey More 1/2 to display REF menu page 2/2.
Basic Operation Press or softkey and turn the Entry knob 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. Save a Reference waveform Note: The reference waveform function is unavailable when X-Y mode is selected.
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.
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 “ ” at the top of the graticule and also in the waveform record data icon at the top of the screen.
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.
Basic Operation Press softkey More 1/2 to display the HORIZONTAL menu page 2/2. Softkey Trig-Offset Reset -More2/2 Options ------- Description Reset the delay time to zero Select page 1/2 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.
Basic Operation Main Horizontal Mode 1. Readout shows the delay time or the trigger location within the record data relative to the time reference point (). 2. The square brackets show the location of current display window within the record data. 3. Trigger position within the record data. 4. Trigger position on the current waveform display window. 5. Main time base.
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.
Basic Operation control knob key to toggle between Main and Delayed mode directly.
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.
Basic Operation Roll - Horizontal Mode Roll mode causes the waveform to move slowly 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.
Basic Operation 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 horizontal mode.
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.
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 unknown signal levels. To display a DC signal, you must use Auto trigger mode since there is no edge to trigger on.
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.
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.
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.
Basic Operation Note: (For models 2540B-GEN and 2542B-GEN only) When Source is set to EXT or EXT/5, the EXT TRG/MOD OUT BNC terminal will function as an external trigger terminal. When Source is set to all other options, the same terminal will function as the modulation waveform output that is part of the built-in arbitrary waveform generator. 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 10 s.
Basic Operation Positive greater than Positive equal Positive within Pulse Positive less than Mode Negative greater than Negative equal Negative within Negative less than Pulse Set the pulse width Setup More 1/2 Note: ---- Select page 2/2 (For models 2540B-GEN and 2542B-GEN only) When Source is set to EXT or EXT/5, the EXT TRG/MOD OUT BNC terminal will function as an external trigger terminal.
Basic Operation Softkey Type Options Video Video triggering Edge Edge triggering Pulse Pulse width triggering Auto Mode Normal Trigger Setup More 2/2 Description ------- 73 Trigger even without a valid event Trigger only on a valid event Select trigger SETUP menu Select page 1/2
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.
Basic Operation Press softkey More 1/2 to display the TRIGGER menu page 2/2. Note: (For models 2540B-GEN and 2542B-GEN only) When Source is set to EXT or EXT/5, the EXT TRG/MOD OUT BNC terminal will function as an external trigger terminal. When Source is set to all other options, the same terminal will function as the modulation waveform output that is part of the built-in arbitrary waveform generator.
Basic Operation Press softkey Trigger Setup from the TRIGGER menu page 2/2 to display the trigger SETUP menu.
Basic Operation The following figures show the video waveforms triggered on odd fields and on a specific line 6.
Basic Operation 2.6 RUN Controls 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 RUN/STOP key to make the oscilloscope start looking for a trigger. The RUN/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.
Menu Operation 3 MENU OPERATION • UTILITY Menu • MEASURE Menu • ACQUIRE Menu • SAVE/LOAD Menu • CURSOR Menu • DISPLAY Menu 79
Menu Operation 3.1 UTILITY Menu Press the UTILITY menu key to show the UTILITY menu.
Menu Operation Press the UTILITY key to display the UTILITY menu page 1/2.
Menu Operation Press the More 1/2 softkey to display the UTILITY menu page 2/2. Softkey Options Service ---- Pass/Fail ---- Self-Cal RUN/STOP Fast-Cal More 2/2 AUTO ON Description Select Service menu Select PASS/FAIL menu Start self-calibration Exit self-calibration Fast calibrate the vertical position OFF Turn off fast calibration ---- Select menu page 1/2 Self-Calibration If you want to maximize measurement accuracy, you can perform a self-calibration.
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. 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.
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. I/O Setup Press UTILITY → I/O Setup to display the I/O SETUP menu.
Menu Operation Press Network Settings softkey to display the LAN menu. Softkey Options Description IP address together with subnet mask and ON gateway address will be set by DHCP server automatically. DHCP You have to set IP OFF 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). OK ------- 85 Confirm and apply the current settings.
Menu Operation Follow the following steps to manually configure the LAN interface: 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.
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: If you are manually entering the LAN settings, you may need to restart the oscilloscope for settings to apply.
Menu Operation Print Setup Press UTILITY → Print Setup to display the PRINT menu. Softkey Options Print to File File Type Print to file BMP(8Bit) 8-Bit BMP file format BMP(24Bit) 24 Bit BMP file format CSV Screen Description CSV file format Normal Normal BMP picture Inverted Inverted color BMP picture ---- Return to the UTILITY menu Print To The Print To softkey option configures what file type to store when the PRINT key is pressed.
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. If 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.
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 CSV 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.
Menu Operation Inverted System Setup Press UTILITY → System Setup to display the SYSTEM menu page 1/2.
Menu Operation Frequency Counter Select the Counter softkey to toggle between enabling and disabling frequency counter shown on screen. Press the More 1/2 softkey to display the SYSTEM menu page 2/2.
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”.
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.
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.
Menu Operation Service Press UTILITY → Service to display the Service menu.
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.
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.
Menu Operation Press More 1/2 to display the PASS/FAIL menu 2/2.
Menu Operation Setup Mask Press UTILITY → Pass/Fail → Setup Mask to display the MASK menu 1/2.
Menu Operation Press More 1/2 to display the MASK menu 2/2.
Menu Operation 3.2 MEASURE Menu MEASURE Menu key Press MEASURE menu key to display the MEASURE menu.
Menu Operation Voltage Measurements Max High Peak-Peak Amplitude Low Min Voltage parameter definitions Press MEASURE → Voltage to display the VOLTAGE menu page 1/4.
Menu Operation Press More 1/4 softkey to display the VOLTAGE menu page 2/4.
Menu Operation Press More 2/4 softkey to display the VOLTAGE menu page 3/4.
Menu Operation Rising Edge Overshoot = Max - High Falling Edge Overshoot = Low - Min Amplitude Amplitude × 100 × 100 Overshoot High Low Overshoot Rising Edge Preshoot = Low - Min Falling Edge Preshoot = Max - High Amplitude Amplitude × 100 × 100 Preshoot High Low Preshoot 106
Menu Operation Press More 3/4 softkey to display the VOLTAGE menu page 4/4.
Menu Operation Press MEASURE → Time to display the TIME menu page 1/5.
Menu Operation Press More 1/5 softkey to display the TIME menu page 2/5.
Menu Operation Press More 2/5 softkey to display the TIME menu page 3/5.
Menu Operation CH1 Delay CH2 Delay definition Press More 3/5 softkey to display the TIME menu page 4/5.
Menu Operation Phase 1 → 2 = CH2 50% Time - CH1 50% Time × 360 CH1 Period Phase 2 → 1 = CH1 50% Time - CH2 50% Time × 360 CH2 Period Period CH1 Delay CH2 Phase 1 → 2 definition Press More 4/5 softkey to display the TIME menu page 5/5.
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.
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.
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. Softkey Mode Options Description Normal Normal acquisition Average Average acquisition Peak Detect Sampling Record Peak detect acquisition Equivalent Equivalent sampling Real Time Real time sampling ---- Select Record menu Normal acquisition mode yields the best display for most waveforms.
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.
Menu Operation Press Mode softkey to select Average mode. Softkey Mode Options Description Normal Normal acquisition Average Average acquisition Peak Peak detect Detect acquisition Set the average number to 2, 4, 8, 16, Averages 32, 64, 128, or 256 Sampling Record Equivalent Equivalent sampling Real Time Real time sampling ---- Select Record menu Press Mode softkey to select Peak Detect mode.
Menu Operation Connect a sine wave signal to the CH1 channel, press ACQUIRE → 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.
Menu Operation Record Wavefrom Press ACQUIRE → Record to show the RECORD menu.
Menu Operation Playback Record Press ACQUIRE → Record to show the RECORD menu. Press Mode softkey to select Playback function.
Menu Operation Press ACQUIRE → 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.
Menu Operation Save/Recall the Record Press ACQUIRE → Record to show the RECORD menu. Press Mode softkey to select Save/Recall function.
Menu Operation Exit Record Function Press Mode softkey to select OFF option and return to the ACQUIRE menu.
Menu Operation 3.4 SAVE/LOAD Menu SAVE/LOAD MENU key Press SAVE/LOAD key to display the SAVE/LOAD menu.
Menu Operation Internal Storage Saving/Loading Trace Press SAVE/LOAD→Internal Storage→Storage type to display the INTERNAL menu and select Trace storage type.
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.
Menu Operation External Storage Press SAVE/LOAD→External Storage to display the EXTERNAL menu. Softkey Options New ---- Rename ---- Load ---- Delete ------- Description Create a new file or folder in the external memory Rename the current file or folder Load the current file Delete the current file or folder 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.
Menu Operation Press SAVE/LOAD→External Storage→New to display the New menu. Softkey New File New Folder Options ---------- Description Display the New File menu Display the New Folder menu. Return to the EXTERNAL menu Press SAVE/LOAD→External Storage→New→New File to display the New File menu.
Menu Operation Save ---- Save the new file ---- 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. Press SAVE/LOAD→External Storage→New→New Foler to display the New Folder menu.
Menu Operation Press SAVE/LOAD→External Storage→Rename to display the Rename menu. Softkey Enter Character Delete Character OK Options Description Enter the selected ---- character and go to the next character position ---------- Delete the selected character Rename the selected file or folder Return to the EXTERNAL menu Press SAVE/LOAD→External Storage→Delete to display the Delete menu.
Menu Operation Firmware Update 1. Press SAVE/LOAD→External Storage to display the EXTERNAL menu. 2. Turn the entry knob to select the correct update file (*.UPT). 3. Press Load softkey to start the update operation. A Loading followed by an updating progress bar will be displayed to indicate update status. 4. 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.
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 of the cursors can be moved by turning the entry knob . Cursor Menu key The oscilloscope provides three kinds of cursor measurement modes: Manual, Auto and Track.
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.
Menu Operation corner when menu is off Displays the difference ΔY ---- 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.
Menu Operation or on the top right corner when menu is off. ΔX is the time difference value ΔX 1/ΔX ---- between X1 and X2 cursors 1/ΔX 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 .
Menu Operation Press CURSOR→Mode to display the CURSOR menu and select the Track mode. Softkey Options Manual Mode Cursor A Cursor B Description Manual cursor measurement Auto Auto cursor measurement Track Track cursor measurement CH1 Track CH1 with Cursor A CH2 Track CH2 with Cursor A None Turn off Cursor A CH1 Track CH1 with Cursor B CH2 Track CH2 with Cursor B None Turn off Cursor B Press this softkey to select Cursor A for adjustment.
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.
Menu Operation 3.
Menu Operation Press DISPLAY menu key to display the DISPLAY menu page 1/2.
Menu Operation Press More 1/2 softkey to display the DISPLAY menu page 2/2.
Shortcut Menu 4 SHORTCUT MENU (2540B/2542B only) • CUSTOM Button • MEASALL Button • RECORD Button • COUNTER/LOCAL Button 141
Shortcut Menu 4.1 Shortcut Controls These four shortcut keys provide alternate quick access to some most frequently used functions or menus. These shortcuts and all details in this section apply to models 2540B and 2542B only. 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.
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: Softkey Options ON Enable OFF Description Enable custom shortcut key Disable custom shortcut key Assign shortcut to a Shortcut --- selected sub-menu category using the knob.
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.
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.
Arbitrary Waveform Generator 5 ARBITRARY WAVEFORM GENERATOR (2540B-GEN/2542B-GEN only) • Waveform Generator Controls • Generator Menu • Output Terminals 147
Arbitrary Waveform Generator Note: All the contents in this chapter apply to models 2540B-GEN and 2542B-GEN only. 5.1 Waveform Generator Controls These four buttons under the “Generator” group are used for setting up and controlling the built-in arbitrary waveform generator in models 2540B-GEN and 2542B-GEN.
Arbitrary Waveform Generator When the MENU button is pressed, the display will open up the generator menu that allows users to setup all supported parameters. See the next section for details. Graph Display When the MENU button is pressed and held for a few seconds, the secondary function will display a graphical illustration of the output. Below is an example screenshot of this display. To close the display, simply press and hold the MENU button for a few seconds.
Arbitrary Waveform Generator FREQ/CAPTURE Button This button has two functions: - Opens the generator menu and places the cursor on the frequency parameter (Primary function) - Captures the signal on display and stores it into internal arbitrary waveform memory (Secondary function) When FREQ button is pressed, the generator menu will automatically open up with the frequency related parameter highlighted and the cursor placed on the frequency.
Arbitrary Waveform Generator Note: The CAPTURE function only works when User ARB is selected as the output type. For all other types, this function is not used.
Arbitrary Waveform Generator ON/OFF Button When ON/OFF button is pressed, the generator output will turn ON and the configured waveform will be output from the GEN OUT BNC terminal. Pressing it again will turn OFF the output. 5.2 Generator Menu Press MENU button under the Generator group of the front panel to enter the generator menu from where all the parameter settings and controls can be accessed. Below are instructions for configuring various settings from the menu.
Arbitrary Waveform Generator Sine Output Press the Output Type softkey to select Sine waveform. SINE menu will be displayed. Softkey Description Output Type Press Output Type to select a standard waveform or modulated signal to output Freq Ampl Offset Press the Freq to select the frequency parameter. Use the left or right keys below the adjustment knob to change cursor selection (selection will be in red color) and rotate the adjustment knob to change the value of the selected digit.
Arbitrary Waveform Generator Square Output Press the Output Type softkey to select Square waveform, SQUARE menu will be displayed. Softkey Output Type Description Press Output Type to select a standard waveform or modulated signal to output Press Freq to select the frequency parameter. Use the left or right keys below the adjustment knob to change cursor selection (selection will be in red color) and Freq rotate the adjustment knob to change the value of the selected digit. When a unit is selected (i.
Arbitrary Waveform Generator Pulse Output Press the Output Type softkey to select Pulse waveform, PULSE menu will be displayed. Softkey Description Output Type Press Output Type to select a standard waveform or modulated signal to output Freq / Period Press this softkey to toggle selection between frequency and period parameter.
Arbitrary Waveform Generator Ampl Offset Width/ Duty output equivalent to the adjusted period from Period selection. Press Ampl to select and change the amplitude parameter. Press Offset to select and change the offset parameter. Press Width/Duty to select and change between the pulse width and duty. Built-in Arbitrary Waveform Output Press the Output Type softkey to select Built-in ARB waveform, ARB menu will be displayed.
Arbitrary Waveform Generator period parameter. Use the left or right keys below the adjustment knob to change cursor selection (selection will be in red color) and rotate the adjustment knob to change the value of the selected digit. When a unit is selected (i.e. Hz, kHz, MHz), rotating the knob will change the parameter upward or downward by x10. Units will automatically change accordingly. Ampl Offset Press Ampl to select and change the amplitude parameter.
Arbitrary Waveform Generator Up Triangle ramp Positive Down ramp pulse Positive Negative double pulse pulse Negative Positive double DC pulse Negative Full wave DC Clipped Half wave sine Gate sine SQRT 158
Arbitrary Waveform Generator Exponential Logarithmic (EXP) (LOG) Semicircle Tanh Sinc Noise Duty 10% Duty 90% Up step Down step Trapezoidal Tri-pulse (Trapezia) Cosine Thyristor (COS) (SCR) 159
Arbitrary Waveform Generator User Programmable Arbitrary Waveform Output Press the Output Type softkey to select User ARB waveform, ARB menu page 1/2 will be displayed. Softkey Output Type Description Press Output Type to select a standard waveform or modulated signal to output Press this softkey to toggle selection between frequency and period parameter.
Arbitrary Waveform Generator Offset More 1/2 Press Offset to select and change the offset parameter. Select page 2/2 Press More 1/2 softkey to display the ARB menu page 2/2. Softkey Options Description With interpolation enabled, the waveform editor makes ON a straight-line connection between points.
Arbitrary Waveform Generator Capture/Storage The capture/storage function allows users to store signals applied to the DSOs CH1 or CH2 into the built-in arbitrary waveform generator’s memory. Additionaly, a MATH function may be applided to the CH1 and CHs input signals before commiting it to the arbitrary memory Press Capture/Storage softkey to display the ARB DATA menu.
Arbitrary Waveform Generator Data displayed data on the screen. If the waveform is non-periodic, then the whole screen data is regarded as one period. Internal Storage Enter the INTERNAL menu ---- for arbitrary waveform save/ load operation. For External Storage, refer to previous SAVE/LOAD menu operation. Users can store the data in .ARB or .CSV format, or load a .CSV file* into volatile External Storage memory (8000 pts ---- maximum) *Must be formatted correctly. Save an arb waveform into .
Arbitrary Waveform Generator Source : This is the source of the signal to be captured and stored into the built-in arbitrary waveform memory. Date Type : This gives the user additional options on what data to capture from the selected source and stored into internal memory. Note: Although screen data contains a total of 1200 pts, the captured waveform will be reduced to 600 pts by recalculating and averaging the original source data As a result, some source data f may be lost. .
Arbitrary Waveform Generator When the screen data is captured with a 200 pixels vertical resolution, it will internally rescale and store the arbitrary data to 256 pixels. This difference in total number of pixels causes the captured waveform to look different from the original source.
Arbitrary Waveform Generator Top edge Displayable vertical data range (200 pixels) Bottom edge Although there will be cases in which the original source signal cannot fit exactly at the maximum and minimum edge of the graticule like the illustration above, use the Ampl softkey in the ARB menu to re-adjust the amplitude of your captured waveform.
Arbitrary Waveform Generator Press Internal Storage softkey to display the INTERNAL menu. Softkey Options Volatile Storage Pos Save User01User10 ---- Description File saved to volatile cannot be retrieved after power off. Files saved to User01 to User10 can be retrieved after power off (non-volatile). Save the displayed screen waveform to the currently selected storage position. Warning: This will also overwrite any waveform data that was previously stored in the selected storage position.
Arbitrary Waveform Generator AM Modulation Press the MENU key and press the Output Type softkey to select amplitude modulation, AM. Softkey Output Type Carrier Shape Carrier Freq Carrier Ampl More 1/2 Options Description Press Output Type select a ---- standard waveform or modulated signal to output Sine Square Select sine waveform as the carrier waveform. Select square waveform as the carrier waveform. Select ---- and specify the carrier frequency.
Arbitrary Waveform Generator Press More 1/2 softkey to display the AM menu page 2/2. Softkey Mod Shape Mod Freq AM Depth Offset More 2/2 Note: The Description Select the modulating waveform from all built-in arbitrary waveforms. Select and specify the modulating frequency. Select and specify the modulation depth. Select and specify the offset voltage Select page 1/2 modulation depth is expressed as a percentage and represents the extent of the amplitude variation.
Arbitrary Waveform Generator FM Modulation Press the MENU key and press the Output Type softkey to select frequency modulation, FM. Softkey Output Type Carrier Shape Carrier Freq Carrier Ampl More 1/2 Options Description Press Output Type to select ---- a standard waveform or modulated signal to output Sine Square Select a sine waveform as the carrier waveform. Select a square waveform as the carrier waveform. Select ---- and specify the carrier frequency.
Arbitrary Waveform Generator Press More 1/2 softkey to display the FM menu page 2/2. Softkey Mod Shape Mod Freq FM Dev Offset More 2/2 Description Select the modulating waveform from all built-in arbitrary waveforms Select and specify the modulating frequency. Select and specify the frequency deviation. Select and specify the offset voltage.
Arbitrary Waveform Generator Pulse Width Modulation Press MENU key and press the Output Type softkey to select pulse width modulation, PWM. Softkey Description Press Output Type to select a Output Type standard waveform or modulated signal to output. Carrier Freq Carrier Ampl Width/ Duty More 1/2 Select and specify the carrier frequency. Select and specify the carrier amplitude. Press Width/Duty to select and change the pulse width/duty.
Arbitrary Waveform Generator Press More 1/2 softkey to display the PWM menu page 2/2. Softkey Mod Shape Mod Freq Width Dev Offset More 2/2 Description Select the modulating waveform from all built-in arbitrary waveforms.. Select and specify the modulating frequency. Select and specify the pulse width deviation. Select and specify the offset voltage.
Arbitrary Waveform Generator DC Offset Modulation (DCOM) This mode sums the carrier waveform with the modulating waveform and outputs the sum of the 2 waveforms. Press MENU key and press the Output Type softkey to select DC offset modulation, DCOM. Softkey Output Type Carrier Shape Carrier Freq Carrier Ampl More 1/2 Options Description Press Output Type to select a ---- standard waveform or modulated signal to output Select sine waveform as the Sine carrier waveform.
Arbitrary Waveform Generator Press More 1/2 softkey to display the DCOM menu page 2/2. Softkey Mod Shape Mod Freq More 2/2 Note: Description Select the modulating function from waveform all built-in arbitrary waveforms. Select and specify the modulating frequency. Select page 1/2 DC offset modulation can be used as an alternative way of adding noise to a sine or square waveform. For example, to add noise to a sine wave, set the Carrier Shape to Sine and the Modulation shape to Noise.
Arbitrary Waveform Generator Frequency Sweep Press the MENU key and press the Output Type softkey to select SWEEP function, SWEEP. Softkey Output Type Options Press Output Type to select a ---- standard waveform or modulated signal to output Select sine waveform as the Sine sweep waveform. Waveform Square Start Freq ---- Stop Freq ---- More 1/2 Description ---- Select square waveform as the sweep waveform. Select and specify the start frequency. Select and specify the stop frequency.
Arbitrary Waveform Generator Press More 1/2 softkey to display the SWEEP menu page 2/2. Softkey Options Up Sweep Mode Down Up-Down Sweep Time ---- Sweep Ampl ---- Offset ---- More 2/2 ---- Description Sweep from start frequency to stop frequency. Sweep from stop frequency to start frequency. Sweep up and down between start and stop frequencies. It will sweep up first, and then down. Select and specify the sweep time from start to stop frequency. Select and specify the waveform amplitude.
Arbitrary Waveform Generator Burst Frequency Press MENU key and press the Output Type softkey to select BURST function, and BURST menu page 1/2 will be displayed. Softkey Output Type Waveform Freq Ampl More 1/2 Description Press Output Type softkey to select a standard waveform or modulated signal to output Select a waveform as the burst waveform. Select and specify the waveform frequency. Select and specify the waveform amplitude.
Arbitrary Waveform Generator Press More 1/2 softkey to display the BURST menu page 2/2. Softkey Cycles Burst Freq Offset More 2/2 Description Select and specify the burst count (number of bursts). Select and specify the burst rate Select and specify the offset voltage. Select page 1/2 Note: The burst frequency defines the rate consecutive bursts. of This is different from the frequency of the waveform.
Arbitrary Waveform Generator FSK and PSK Modulation Press MENU key and press the Output Type softkey to select Keying modulation, KEYING menu page 1/2 will be displayed. Softkey Output Type Keying Type Carrier Freq Carrier Ampl More 1/2 Options Description Press Output Type to select a ---- standard waveform or modulated signal to output FSK PSK ---------- Select Frequency Shift Keying modulation. Select Phase Shift Keying modulation. Select and specify the carrier waveform frequency.
Arbitrary Waveform Generator Press More 1/2 softkey to display the KEYING menu page 2/2. Softkey Description FSK Modulation: Hop Freq/ frequency. Hop Phase PSK Modulation: Specify the hop Specify the hop phase. Interval Offset More 2/2 Select and specify the time interval between two frequency shifts. Select and specify the offset voltage.
Arbitrary Waveform Generator 5.3 Output Terminals GEN OUT Generator BNC output This is the main output of the arbitrary waveform generator. When the MENU button is pressed and is lit, the configured waveform will output from this terminal.
Arbitrary Waveform Generator This is the generator’ s modulating waveform output. This terminal also serves as as the external trigger input for the oscilloscope. When Trigger Source in the Trigger menu is set to EXT or EXT/5, this terminal will function as an external trigger input for the oscilloscope. When it is set to all other sources, it will function as the modulating waveform output from the generator.
Quick Start Guide 6 QUICK START GUIDE • • Application Examples - Making Simple Measurements - Capture Single Shot Signal - Reduce Random Noise on a Signal - Triggering a Video Signal - PASS/FAIL Measurement - Using Waveform Recorder - Making Cursor Measurements Generator Application Examples - Output Basic Sine Waveform - Output Amplitude Modulated Waveform - Create Waveform with Added Noise - Capture and Output Math Waveform 185
Quick Start Guide 6.1 Making 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.
Quick Start Guide Press the Amplitude softkey to measure the Amplitude. The amplitude value will be displayed at the bottom of the screen. Press 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.
Quick Start Guide 6.2 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.
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 displayed, the SINGLE key will no longer be lit, and the RUN/STOP key will illuminate in red.
Quick Start Guide 6.3 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. Connect a signal to the oscilloscope. Press AUTO key to display the signal quickly. Press the Trigger MENU key to display the TRIGGER menu.
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 ( ) to set the number of averages that best eliminates the noise from the displayed waveform.
Quick Start Guide 6.4 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 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.
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 Press Sync softkey to select Line # or All Lines. 193 .
Quick Start Guide 6.5 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.
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 measurement.
Quick Start Guide 6.6 Using Waveform Recorder Waveform recorder lets you record waveforms, playback waveforms, and save waveforms. Perform the following steps to record waveforms. Press the ACQUIRE key to display the ACQUIRE 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.
Quick Start Guide Perform the following steps to playback the waveforms. Press the ACQUIRE key to display the ACQUIRE menu. Press the RECORD softkey to display the RECORD menu. Press the Mode softkey to select Play back mode. Press Play Mode softkey to select or 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.
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.
Quick Start Guide Perform the following steps to save the waveform recorded. Press the ACQUIRE key to display the ACQUIRE 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.
Quick Start Guide 6.7 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 when X-Y horizontal mode is selected. Measure the time and voltage on normal waveform Perform the following steps to take time and frequency measurements.
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 Y1--/ Y2—softkey or press the entry knob to select Y1 cursor. Rotate the entry knob Press Y1--/ to move the Y1 cursor. Y2—softkey or press the entry knob to select Y2 cursor.
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 Math menu. Press the Operate softkey to select FFT and display the FFT menu. Press the CURSOR key to display the CURSOR menu. Press Mode softkey to select the Manual mode. Press Source softkey to select FFT. Press Type softkey to select the Time type. Press X1--/ X2—softkey or press the entry knob to select X1 cursor.
Quick Start Guide Press Source softkey to select FFT. Press Type softkey to select the Voltage type. Press Y1--/ Y2—softkey or press the entry knob to select Y1 cursor. Rotate the entry knob Press Y1--/ to move the Y1 cursor. Y2—softkey or press the entry knob to select Y2 cursor. Rotate the entry knob ΔY displayed in the softkey area is the voltage difference to move the Y2 cursor. between Y1 and Y2.
Quick Start Guide Measure the phase difference between two signals 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.
Quick Start Guide Press Y1--/ Y2—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 Y1--/ Y2—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. ΔY displayed in the softkey area is the voltage difference C (or 2A) between Y1 and Y2.
Quick Start Guide 6.8 Output Basic Sine Waveform This application example describes how to use the generator to output a sine waveform with 10 kHz frequency, 6 Vpp amplitude and 1 Vdc offset voltage. Perform the following steps to output the specified sine waveform. Connect the WG Output teminal to CH1 terminal. Press ON/OFF key to enable signal output. Press the MENU key to display the arbitrary waveform generator menu. Press Output Type softkey to select the Sine waveform.
Quick Start Guide 6.9 Output Amplitude Modulated Waveform This application example describes how to use the generator to output an amplitude modulated waveform with 100% modulation depth, 10 kHz carrier frequency, 600 mV carrier amplitude, 100 Hz modulating frequency and 0.0 mVdc offset.
Quick Start Guide Perform the following steps to output the amplitude modulated waveform. Connect the WG Output teminal to CH1 terminal. Press ON/OFF key to enable signal output. Press the MENU key to display the arbitrary waveform generator menu. Press Output Type softkey to select AM modulation. Press Carrier Freq softkey to select and specify the carrier frequency to 10 kHz. Press Carrier Ampl softkey to select and specify the carrier amplitude to 600 mVpp.
Quick Start Guide Press Mod Shape softkey and select Sine as the modulating waveform shape. Press Mod Freq softkey to select and specify the modulating waveform frequency to 100 Hz. Press AM Depth softkey to select and specify the modulation depth to 100%. Press Offset softkey to select and specify the offset voltage to 0.
Quick Start Guide 6.10 Create Waveform with Added Noise This section will demonstrate a quick way to create a sine wave with added random noise. In this example, we will create this waveform with a frequency of 1 kHz and amplitude of 2 Vpp. Follow the steps below: 1. Press the MENU key to enter the ARB menu, and set Output Type to DCOM. 2. Select Carrier Shape softkey and set it to Sine. 3. Set the Carrier Freq to 1.000000 kHz, and set Carrier Ampl to 2.000 Vpp. 4.
Quick Start Guide 6.11 Capture and Output Math Waveform This section will demonstrate an example of capturing a Math waveform output that is internally calculated between two channels of the oscilloscope and storing it into arbitrary waveform memory for output from the generator. In this example, CH1 and CH2 signals will be added together to create the Math waveform. Follow the steps below: 1. Press the MATH key to enter the MATH menu, and set Operate parameter to A+B.
Quick Start Guide 2. Press the MENU key and select Output Type to be User ARB. 3. Then, select More 1/2 softkey and select Capture/Storage softkey. 4. Press the Source softkey and select A+B. Note: This selection will change depending on the Operate parameter set under MATH menu. 5. Select Data Type as Period Data if you want to store a complete period of the CH1+CH2 waveform, or select Screen Data to capture only what’s displayed on the screen. 6.
Remote Control 7 REMOTE CONTROL • Comsoft Software • Web Browser GUI (Graphic user Interface) 213
Remote Control 7.1 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. It also supports creating and *uploading arbitrary waveforms for models 2540B-GEN and 2542B-GEN. *Uploads up to 8kpts into volatile memory. The software is free and can be downloaded at www.bkprecision.com 7.
Troubleshooting Guide 8 TROUBLESHOOTING GUIDE • System Messages • General Problems 215
Troubleshooting Guide 8.1 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 turning the Entry knob, Vertical Control knobs, Horizontal Control knobs, or Trigger Level knob.
Troubleshooting 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.
Troubleshooting 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.
Troubleshooting 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 automatically.
Troubleshooting Guide 8.2 General Problems If there is no display on the screen: • Check that the power cord is connected to the oscilloscope and to a live power source. • Check that the power switch is on. If there is no waveform displayed: • 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.
Troubleshooting Guide If the amplitude is not identical with the actual voltage • 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 • Try using DHCP if not already. • Reboot the instrument, then try again. How do I extract the deep memory from the DSO? • This can only be extracted using provided PC software. It cannot be exported directly to a connected front USB flash drive.
Specifications 9 SPECIFICATIONS • Digital Storage Oscilloscope Specifications • Arbitrary Waveform Generator Specifications • General Specifications 223
Specifications 9.1 Digital Storage Oscilloscope Specifications All specifications are typical performance values and are not warranted. Specifications 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 60 MHz: 2540B, 2540B-GEN Bandwidth 100 MHz: 2542B, 2542B-GEN < 5.83 ns: 2540B, 2540B-GEN < 3.50 ns: 2542B, 2542B-GEN Calculated rise time (=0.
Specifications Position range ±8 divisions away from the center of the screen Attenuation factor X1, X10, X100, X1000 Channel common 100:1 at 60 Hz mode rejection 20:1 at 10 MHz Lower frequency ≤ 5 Hz at BNC limit, AC coupled ≤ 1 Hz when using a 10X passive probe [1] Channel to ≥ 100:1 at 1 MHz channel crosstalk ≥ 100:1 at 10 MHz Input Impedance 1 MΩ ||18 pF Maximum input [1] 400 Vpk @1 MΩ ±150 ps when vertical scale and coupling Differential delay settings are identical [1] Bandwidth
Specifications Measurements Max, Voltage measurement Min, VPP, High, Low, Amplitude, Average, RMS, Overshoot, Preshoot, Cycle average, Cycle RMS Frequency, Period, Rise time, Fall time, Time measurement +Width, -Width, +Duty, -Duty, Delay, Phase, X@MAX, X@MIN Math Cursors A+B, A-B, A×B, FFT (1024 points) Manual, Auto, and Track Built-in 5-digit frequency counter. Count up to Counter the oscilloscope’s maximum bandwidth.
Specifications Trigger system Source CH1, CH2, EXT, EXT/5, AC Line, Alternating Modes Auto, Normal, Single Coupling Type DC, AC, LF-Reject, HF-Reject Edge, Pulse, Video Internal: ±8 divisions from screen center Trigger level range EXT: ±1.6 V EXT/5: ±8 V Trigger sensitivity 0.1 div to 1.
Specifications Storage and I/O 10 setups and trace files can be saved and Internal memory recalled internally. External storage file format Setup file(*.STP), Waveform file(*.WFM), Trace file(*.TRC), BMP file(*.BMP), **CSV file(*.CSV) USB host USB device Standard interface RS232C ports PASS/FAIL OUT (BNC) LAN **Maximum number of data points that can be stored into a .CSV file on an external USB storage device is 1200 points.
Specifications Acquisition system Max real time 1 GSa/s sample rate Max equivalent 50 GSa/s sample rate 1 GSa/s: 16 kpts 500 MSa/s: 8 kpts (dual channel) Max memory depth 500 MSa/s: *2.4 Mpts (single channel) (Based on Sample rate) ≤ 250 MSa/s: *1.
Specifications Display system Display Resolution Colour Brightness 5.7-inch TFT LCD display.
Specifications 9.2 Arbitrary Waveform Generator Specifications Note: The specifications in this section apply to models 2540B-GEN and 2542B-GEN only.
Specifications distortion Rise / Fall time < 20 ns (square) Pulse Characteristics Duty Cycle 0.01 % to 99.99 % Width 10 ns to 999.99 s Arbitrary Characteristics Sampling Rate 40 MSa/s Vertical Resolution 8 bits Waveform Length 8192 points *) Non-volatile Memory 10 waveforms *) The internal memory size is 8192 points, however Comsoft and .CSV file upload supports only 8000 points. Amplitude Characteristics Generator Output (GEN Out) When freq.
Specifications Amplitude stability ± 2% in 4 hours When freq. ≤ 5 MHz: ± 5% Amplitude flatness When freq. > 5 MHz: ± 10% Amplitude flatness When freq. ≤ 50 kHz: ± 5% (Built-in ARB, User When freq.
Specifications Semicircle, Tanh, Sinc, Noise, Duty 10%, Duty 90%, Up Step, Down Step, Tri-pulse, Trapezoidal, Cosine, SCR AM modulation depth 0% to 120% FM Frequency deviation 0.1% to 99.
Specifications Frequency Sweep Characteristics Waveforms Sine, Square Sweep mode Up, Down, Up-Down Sweep time 1 ms to 500 s Burst Characteristics Waveforms all built-in arbitrary waveforms Counts 1 to 60000 cycles Burst rate 1 mHz to 1 MHz DC Offset Characteristics Offset range Amplitude range -10 mVdc to +10 mVdc 2 mVpp to 6.32 mVpp -31.6 mVdc to +31.6 mVdc 6.321 mVpp to 20 mVpp -100 mVdc to +100 mVdc 20.001 mVpp to 63.2 mVpp -316 mVdc to +316 mVdc 63.
Specifications 9.3 General Specifications Power and environmental requirements 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 to 40°C Non-operating -20°C to 55°C temperature Maximum relative humidity 80% for Humidity temperatures up to 31°C decreasing linearly to 50% relative humidity at 40°C Operating altitude ≤ 3000 m Non-operating altitude ≤ 15000 m Physical size and Weight Instrument height 156.
Specifications 9.4 Certification CE Compliant CE Declaration of Conformity The oscilloscope meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnet Compatibility Directive and Low Voltage Directive - EN 61010-1:2001 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.
Performance Verification Procedure Appendix A: Performance Verification Procedure • DC Gain Accuracy • Bandwidth • Trigger Sensitivity • Time Scale Accuracy 238
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 does not meet published specifications, the unit must be returned to B&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.
Performance Verification Procedure 8. Connect calibrator to oscilloscope. If preferred calibrator is not available, connect alternative equipment as follows: Oscilloscope DC Power DMM Supply 9. 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. 10.
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. Calibrator or Oscilloscope Signal Generator 2. Set CH1 input attenuation to 5 mV/div, DC coupling, and horizontal scan 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 mVpp. 5.
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. Calibrator or Oscilloscope 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.
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 50ohm feed thru connector. If recommended calibrator is not available, connect alternative equipment as follows: Calibrator or Oscilloscope Signal 2. On the oscilloscope, the time base is switched to the sweep speed under test. 3. Set up a 10 MHz sine wave output from calibrator. 4.
Performance Verification Procedure 1 kHz. 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&K Precision at http://www.bkprecision.com/contact-us.html .
Performance Verification Procedure Mask, 100 odd fields, 74 Overshoot, 105 Pass/Fail, 98 Peak-Peak, 103 Persist, 139 Playback, 120 Preshoot, 105 Pulse Width Trigger, 71 quick help, 32 Record Wavefrom, 119 REF, 53 Roll mode, 63 Screen Test, 96 Self-calibration, 82 Trace, 125 trigger level, 66 Trigger Modes, 67 vertical position knob, 35 vertical scale, 36 Video Trigger, 74 X-Y, 62 AC coupling, 37 Acquisition status, 23 attenuation, 28 Autoset, 33 Band block filter, 42 bandwidth limit, 39 Cursors, 132 DC co
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 #.
LIMITED THREE-YEAR WARRANTY B&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&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.
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