BK Precision 2530 Instruction Manual
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BK Precision 2530 Instruction Manual

BK Precision 2530 Instruction Manual

Digital storage oscilloscope 25mhz, 250msa/s
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INSTRUCTION
MANUAL
MODEL 2530
Model 2530 Digital Storage Oscilloscope
25MHz, 250MSa/s

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  • Page 1 INSTRUCTION MANUAL MODEL 2530 Model 2530 Digital Storage Oscilloscope 25MHz, 250MSa/s...
  • Page 2 General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. To Avoid Fire or Personal Injury Use Proper Power Cord.
  • Page 3 Introduction Description The 2530 Digital Storage Oscilloscope is a light-weight benchtop oscilloscope for viewing waveforms and taking measurements. The 2530 is an ideal education and training tool and also well suited for applications in service and repair. Key Features 25 MHz bandwidth, 250MSa/s sample rate...

  • Page 4: Table Of Contents

    Table of Content Chapter 1 Getting Started..............6 1.1 Installation......................... 6 1.2 Functional check ....................... 6 1.3 Probe handling ......................8 1.3.1 Probe Safety ......................8 1.3.2 Probe Compensation ....................8 1.3.3 Probe Attenuation Setting ..................9 1.4 Self Calibration ....................... 10 Chapter 2 Main Control Sections Overview ......
  • Page 5 3.8 Setting up the Horizontal system ................49 3.8.1 Horizontal control knobs..................49 3.8.2 Window Zone....................... 49 3.8.3 Trigger holdoff ..................... 50 3.9 Set trigger system....................50 3.10 Menu and control button ..................51 3.11 Connectors ......................51 Chapter 4 Application Examples...........53 4.1Taking Simple Measurements ..................

  • Page 6: Chapter 1 Getting Started

    Chapter 1 Getting Started This Chapter describes the following: ◆ Installation ◆ Basic functional check ◆ Probe check and compensation ◆ Setting of probe attenuation factor ◆ Self calibration procedure 1.1 Installation Inspection Inspect the shipping container and the product for damage. In case of any damage, notify your authorized B+K Precision distributor.
  • Page 7 ON OFF button Figure 1- 2 Set the switch to 10X on the included probe and connect it 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.

  • Page 8: Probe Handling

    1.3 Probe handling 1.3.1 Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock. Figure 1-5 Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements.

  • Page 9: Probe Attenuation Setting

    Figure 1-6 Set the Probe option attenuation in the channel menu to 10X. Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope. If you use the probe hook-tip, ensure a proper connection by firmly inserting the tip onto the probe.

  • Page 10: Self Calibration

    settings are 1X and 10X. Note. When the Attenuation switch is set to 1X, the probe limits the bandwidth of the oscilloscope to 6MHz. To use the full bandwidth of the oscilloscope, be sure to set the switch to 10X. 1.4 Self Calibration The self calibration routine lets you optimize the oscilloscope’s signal path for maximum measurement accuracy.

  • Page 11: Chapter 2 Main Control Sections Overview

    Chapter 2 Main Control sections overview The front panel is divided into easy-to-use functional areas. This chapter provides you with a quick overview of the main controls. Figure 1- 1 Front Panel Controls To use your oscilloscope effectively, you need to familiarize yourself with the following control sections: ◆...
  • Page 12 Figure 2-1 Table 2-1 Vertical Control menu Menu Settings Explanation Both AC and DC components of the input signal are passed on to the oscilloscope The DC component is blocked, only the AC component of the input signal is passed Coupling through.

  • Page 13: Horizontal System

    Note： ● If DC coupling is active，you can quickly measure the DC component of the signal by simply noting its distance from the ground symbol. ● If the channel is set to AC coupling， the DC component of the signal is blocked allowing you to use greater sensitivity to display the AC component of the signal.
  • Page 14 Figure 2-3 Horizontal POSITION Knob： Used to control the position of the trigger relative to the center of the screen. When the trigger point (downward arrow) moves outside the acquired waveform, (reaches the left or right edge of the screen) the instrument switches automatically to delayed sweep, indicated by the arrow pointing left or right instead of downwards.

  • Page 15: Trigger System

    Note： • When you change between the Main, Window Zone, and Window views, the oscilloscope erases any waveform which was saved on the screen using persistence. • Use holdoff to help stabilize the display of aperiodic waveforms. 2.3 Trigger System The trigger determines when the oscilloscope starts to acquire data and display a waveform.

  • Page 16: Signal Source

    (available only with Edge trigger). 2.3.2 Trigger Type The 2530 supports three types of Trigger signals： Edge， Video and Pulse Trigger. Edge trigger can be used with analog and digital circuits. An edge trigger occurs when the trigger input passes through a specified voltage level with the specified slope.
  • Page 17 Table 2-3 Edge Trigger Menu ： Menu Setting Explanation With Edge selected, the rising or falling edge of the input signal is Type Edge used for the trigger Triggers on CH1 or CH2 regardless of whether or not the waveform is displayed。...
  • Page 18 Table 2-4 Video Trigger Menu： Menu Setting Explanation Type Video When you select Video Trigger mode, set coupling to AC. Now you can trigger from a NTSC or PAL/SECAM video signal. Source Select the input source to be the trigger signal. Ext and Ext/5 use the signal applied to the EXT TRIG connector as the EXT/5 source.

  • Page 19: Coupling

    (Negative pulse width equal to pulse width setting) Adjust the pulse width with the 20.0ns～10.0s set width ADJUST knob Auto Select the type of triggering; Mode Normal Normal mode is best for most single Pulse Width trigger applications Coupling HF Reject LF Reject Hint：Use Pulse Width triggering to trigger on aberrant pulses.

  • Page 20: Acquisition System

    Rising edge Falling edge Figure 2-7 Note: • Press the SINGLE button when you want the oscilloscope to acquire a single waveform • Trigger coupling affects only the signal passed to the trigger system. It does not affect the bandwidth or coupling of the signal displayed on the screen.
  • Page 21 Table 2- 6 Acquire Menu: Menu Set up Explanation Sampling Use to acquire and accurately display most waveforms Peak Detect Use to detect glitches and decrease the possibility of aliasing. Average Select this mode to reduce the displayed random noise. Averages Specify number of averages Mode...
  • Page 22 Figure 2-10 Peak Detect mode Average: The oscilloscope acquires several waveforms, averages them, and displays the resulting waveform. Advantage: You can use this mode to reduce random noise. Figure 2-11 Average mode Equivalent Time Sampling： The equivalent time sampling mode can achieve up to 20 ps of horizontal resolution (equivalent to 50 GSa/s).

  • Page 23: Display System

    waveform and then stop. (Make sure the Run Stop button is green and the display annunciator is in the Ready state). After the oscilloscope detects a trigger, it completes the acquisition then stops. Each time you push the SINGLE button, the oscilloscope begins to acquire another waveform. Base time: The oscilloscope digitizes waveforms by acquiring the value of an input signal at discrete points.
  • Page 24 Table 2-7 Options Set up Explanation Vectors Vectors fills the space between adjacent sample Type Dots points in the display Display sample points Sets the length of time each sampling point 1 sec remains visible. Persist 2 sec 5 sec Infinite Increase the display contrast ＋...

  • Page 25: X-Y Format

    2.5.1 X-Y Format Use the XY format to analyze phase differences, such as those represented by Lissajous patterns. The format plots the voltage on channel 1 against the voltage on channel 2, where channel 1 is the horizontal axis and channel 2 is the vertical axis. The oscilloscope uses the untriggered sample acquisition mode and displays data as dots.

  • Page 26: Graticule Measurement

    2.6.1 Graticule Measurement This method allows you to make a quick, visual estimate. For example, you might look at a waveform amplitude and determine that it is a little more than 100 mV. You can take simple measurements by counting the major and minor graticule divisions involved and multiplying by the scale factor. For example, if you counted five major vertical graticule divisions between the minimum and maximum values of a waveform and knew you had a scale factor of 100 mV/division, then you could easily calculate your peak-to-peak voltage as follows:...

  • Page 27: Auto Measurement

    Figure 2-17 Voltage Cursor： Voltage cursors appear as horizontal lines on the display and measure the vertical parameters. Time Cursor： Time cursors appear as vertical lines on the display and measure the horizontal parameters. Moving Cursors：Use the ADJUST knob to move cursor1 and cursor2. Cursors can be moved when the cursor menu is displayed.
  • Page 28 1. Press one of the five option buttons corresponding to measurement 1 – 5 . This will open a sub menu. 2. Enter the Source of the measurement and the measurement type 3. Press the bottom option button to turn the measurement on If you want to display all eleven measurements at once, select “All Mea”...
  • Page 29 2-8 Measurement Types： Measure Type Introduction Vmax examines the entire 2500 point waveform record and displays the Vmax maximum value Vmin examines the entire 2500 point waveform record and displays the Vmin minimum value Vpp calculates the absolute difference between the maximum and minimum peaks of the entire waveform Vavg Count the arithmetic average value in the record...

  • Page 30: Utility System

    2.7 Utility System ”: The Utility System Button。 Utility Setup button Figure 2-22 Table 2- 9 Utility Menu options Option Setting Comment System Status Displays information about the hardware and software configuration Sound This option turns the button beep on or off Counter Turn the Trigger frequency counter On/Off* Language...

  • Page 31: System Status

    2.7.1 System status Selecting “System Status” from the Utility Menu to display information about a particular unit Table 2-10 Display Explanation Startup Times Counts the times the unit was turned on/off. Software version Gives the software version Hardware Version Gives the hardware version Product type Lists the model number Serial No.

  • Page 32: Save/Recall System

    (1) Screen Test： Select “Screen Test” to enter the screen mode. Press the SINGLE key to continue，press RUN/STOP to exit. (2) Keyboard Test Select “Keyboard Test” to enter the key test mode. The shapes with two arrows beside them represent the front panel knobs.
  • Page 33 Table 2-13 Menu Setting Explanation Type Setups Menu for the Storage/Recall setting in the oscilloscope Setup NO.1 to NO.10 Select the memory location to/from which you want to save/recall a setup Save Save a setup to the memory location selected Recall Recall a setup from the memory location selected Figure 2-27...
  • Page 34 SAVE/RECALL WAVEFORM SAVE/RECALL CAPTURED WAVEFORM： The oscilloscope must display any waveform that you want to save. The oscilloscopes can store ten captured waveforms in nonvolatile memory. Table 2-15 Option Setup Introduction Type waveforms Menu for the Storage/Recall waveforms in the oscilloscope waveform NO.1 to NO.10 Save/Recall the waveforms in the currently position Save Accomplish the storage...

  • Page 35: Chapter 3 Operating Basics

    Chapter 3 Operating Basics The previous chapter introduced the main functional blocks of the instrument. This chapter explains in more detail how to set up the oscilloscope to view signals and to make measurements. Explanation of Display area Using the Menu System Using the Default Setup Using the Auto Setup Using the Universal knob...

  • Page 36: Using The Menu System

    Average mode Trigger status □ Armed. The oscilloscope is acquiring pretrigger data. All triggers are ignored in this state. Ready. All pretrigger data has been acquired and the oscilloscope is ready to accept a trigger Trig’d. The oscilloscope has received a trigger signal and is acquiring the post trigger data. Stop.

  • Page 37: Using The Default Setup

    3.4 Using the auto setup The 2530 Digital Storage Oscilloscope has an auto setup function which can identify the type of waveform and automatically adjust controls to produce a usable display of the input signal. Press the Auto button to...
  • Page 38 Table 3-1 Auto set the function Menu ： Option Set Up Comment Auto set the screen and display multiple cycles Auto set the screen and display a single cycle Auto set and show the rise time Auto set and show the fall time （...

  • Page 39: Using The Adjust Knob

    3.5 Using the ADJUST knob ADJUST knob Figure 3-4 The 2530 Series Digital Storage Oscilloscope comes with an ADJUST knob. Use this knob to set up the holdoff time, cursor positions for measurements, pulse width and the Video Line number Adjust holdoff time Press the HORI MENU button to show the “Hori Menu”.

  • Page 40: Setting Up The Vertical System

    Press the Cur1 option button, turn the ADJUST knob to adjust Cur1. Press the Cur2option button, turn the ADJUST knob to adjust Cur2. The value of Cursor1 and Cursor2 is incremented and displayed on the top right of the screen. Pulse Setup Press the “TRIG MENU”...
  • Page 41 Figure 3-6 • Press“CH1”→“Coupling”→“GND”. Select GROUND mode to disconnect the input signal. Figure 3-7 2.Volts/Div settings Vertical scaling can be adjusted in 2 modes, Coarse and Fine. The vertical sensitivity range is 2mV/div～ 5V/div scale。 Take CH1 for example • Press“CH1”→“Volts/Div”→“Coarse”.
  • Page 42 Figure 3-10 Press“CH1”→“Volts/Div”→“Fine”. This setting changes the vertical scale to small steps between the ● coarse settings. It is useful when you need to adjust the vertical scale in small steps to set a specific value. Figure 3-11 4. Probe Attenuation The setting of the attenuation coefficient in the menu must match the setting of the probe., If the attenuation coefficient is 10 :1, the input coefficient should be set to 10X in order to obtain correct readings.
  • Page 43 Figure 3-12 5. To invert a waveform Press“CH1”→“Invert”→“off” ● Figure 3-13 Press“CH1”→“Invert”→“on” ● Figure 3-14...

  • Page 44: Using The Vertical Position Knob And Volts/Div Knob

    3.6.2 Using the Vertical Position knob and Volts/Div knob The vertical“POSITION”knob is used to adjust the vertical position of each channel (including MATH and REF wave). This knob’s resolution varies according to the currently set scale factor (set by Volts/Div knob). The Volts/Div knob adjusts the vertical resolution of each channel, (including the MATH and REF waves).

  • Page 45: Math Functions

    3.7 Math Functions This oscilloscope supports arithmetic math functions +,-,*, and FFT operations which depending on the operation, can be applied to either channel or both channels. Press the MATH MENU button to display the waveform math operations. Table 3-3 MATH Menu Function Set up...
  • Page 46 1. FFT Spectrum Analyzer The FFT process mathematically converts a time-domain signal into its frequency components. You can use the Math FFT to analyze the following type of signals: • Characterize noise in DC Power supplies • Test the impulse response of filters and systems •...
  • Page 47 Explanation of Figure 3-16: In this example the position at the center graticule is 3kHz (Pos: 3.00 kHz), the frequency of the second harmonic. The vertical scale is set to 100mVrms/Div and the horizontal scale is set to 12.5kHz (1.25kHz x 10 zoom factor).
  • Page 48 Table 3-6 Window Characteristics Application/ Measurement Best frequency resolution, worst Symmetric transients or bursts. magnitude resolution. This is Equal-amplitude sine waves with Rectangular essentially the same as no window. fixed frequencies. Broadband random noise with a relatively slowly varying spectrum. Better frequency, poorer magnitude Sine, periodic, and narrow-band accuracy than Rectangular.

  • Page 49: Setting Up The Horizontal System

    3.8 Set up the Horizontal system 3.8.1 Horizontal control knobs The oscilloscope shows the time per division in the center of the bottom status bar. The horizontal controls change the horizontal scale and position of waveforms. The horizontal center of the screen is the time reference for waveforms.

  • Page 50: Trigger Holdoff

    Position and Time//Div controls to enlarge or minimize waveforms in the Window Zone Figure 3-19 Window setup Figure 3-20 Window zone 3.8.3 Trigger holdoff If you want to change the holdoff time, do the following: Press the HORI MENU button to show the Horizontal Menu Press Holdoff。...

  • Page 51: Menu And Control Button

    button. “LEVEL”knob：The LEVEL knob sets the amplitude level the signal must cross to cause an ■ acquisition. “SET TO 50%”: The trigger level is set to the vertical midpoint between the peak values of the ■ trigger signal. “FORCE”button： Completes an acquisition regardless of an adequate trigger signal. This button is ■...
  • Page 52 Figure 3-24 Probe component: Voltage probe compensation output and ground. Use to electrically match the ■ probe to the oscilloscope input circuit. CH1、CH2 :Input connectors for waveform display. ■ EXT TRIG: Input connector for an external trigger source. Use the Trigger Menu to select the Ext or ■...

  • Page 53: Chapter 4 Application Examples

    Chapter 4 Application Examples This section presents a series of application examples. These basic examples highlight the features of the oscilloscope and provide you with ideas how you can solve your testing problems using the 2530 oscilloscope. ◆ Taking simple measurements ◆...

  • Page 54: Taking Cursor Measurements

    Press the top option button, Measure value#1 Menu appears. ● Press the “Type” option button and select “Freq”. ● Press the “off” option button. ● The value below “freq” is the result of the measurement. (2) Measure signal peak-to-peak amplitude Press the second option button from the top，...

  • Page 55: Measuring Ring Amplitude

    4.2.2 Measuring Ring Amplitude To measure the amplitude, follow these steps: Press the “CURSORS” button to see the Cursor Menu. Press the “Type” option button and select “Voltage”. Press the “Source” option button and select“ CH1”. Press the“ cur1 ”option button and turn the universal knob to place the cursor 1 on the highest peak of the ring.

  • Page 56: Analyzing Signal Details

    4. Turn the “LEVEL” knob to adjust the trigger level 5. Press the “SINGLE” button to start capturing. (Make sure Run/Stop button is green) When the trigger conditions are met, data appears on the display representing the data points that the oscilloscope obtained with one acquisition.

  • Page 57: Triggering On Video Lines

    Press the “TRIGMENU” button to see the “trig menu” Press the top option button and select “Video”. Press the “source” option button and select “CH1”. Press the “Sync” option button and select “Odd Field” or “Even Field”. Press the “Standard” option button and select “NTSC”. Adjust the horizontal “Time/Div”...

  • Page 58: Analyzing A Differential Communication Signal

    Turn the VOLTS/DIV and VERTICAL POSITION knobs to optimize the display. 10 Press the “Persist” option button and select “Infinite”. 11 Press the “Contrast －” or “Contrast + ”option buttons to adjust the contrast of the screen. 12 Apply the Ellipse method to observe the phase difference between the two channels Figure 4-3 sinθ=A/B or C/D where θ=phase shift (in degrees )between the two signals.
  • Page 59 - Turn the CH 1 and CH 2 VOLTS/DIV and VERTICAL POSITION knobs to adjust the vertical scale and position. NOTE. Be sure to first compensate both probes. Differences in probe compensation appear as errors in the differential signal.

  • Page 60: Chapter 5 Prompt Messages And Troubleshooting Hints

    Chapter 5 Prompt messages and troubleshooting hints 5.1 Prompt messages: ■ Trig volt level at limit ：When turning the trigger knob, Alerts the user that the trigger level reached its limit ■ Horizon position at limit：When turning the horizontal position knob , alerts user that the horizontal position reached its limit ■...
  • Page 61 Trigger mode. The signal will be stable only if the appropriate trigger mode is used. Try changing coupling to “HF Reject” or “LF Reject” to filter out High/low frequency noise 5. No display after pressing the RUN/STOP button Check the trigger mode is set to Normal or Single Check the trigger level exceeds the maximum waveform amplitude.

  • Page 62: Appendix A: Specifications

    Appendix A: Specifications All specification apply to a 10X probe setting. To verify that the oscilloscope meets specifications, the oscilloscope must first meet the following conditions: The oscilloscope must have been operating continuously for twenty minutes within the specified operating temperature. You must perform the Do Self Cal operation, accessible through the Utility menu, if the operating temperature changes by more than 5°...
  • Page 63 X-Y Mode X-pole Input / Y-Pole Input Channel 1 (CH1) / Channel 2 (CH2) Phase Error ±3 degrees Trigger System Trigger Types Edge, Pulse (Width), Video Trigger Modes Auto, Normal, Single Trigger Coupling AC, DC, LF reject, HF reject Trigger Source CH1, CH2, AC line, Ext, Ext/5 Trigger Level Range CH1, CH2:±12 divisions from center of screen...
  • Page 64 Environmental Temperature Operating：0℃ to +55℃ Nonoperating ：-40℃ to +70℃ Operating：95%RH，40℃ Humidity Nonoperating：90%RH，65℃s Operating：4000m Altitude Pollution degree 2 for indoor use only. Pollution Degree Power Supply Input Voltage 100-240 VAC, CAT II, Auto selection Frequency 45Hz to 440Hz Power 50VA Max Mechanical Dimensions 300mm (Depth) x 290 mm (Width) x 150mm (Height)

  • Page 65: Appendix B: Default Setup

    Appendix B: Default setup source MEASURE type Average mode Sample Averages ACQUIRE Sample mode Equ time type Vectors Persist DISPLAY grid type waveform source REFA type Edge source slope Rising TRIGGER (edge) Auto Mode Coupling LEVEL 0.00V type Pulse source when TRIGGER (pulse) 1.00ms...

  • Page 66: Appendix C: Sample Rate Versus Timebase Setting

    Appendix C: Sample rate versus time base setting Time base (/div) Sampling rate(S/s) Equivalent time sampling Real time sampling 2.5ns 250M 250M 10ns 250M 25ns 250M 50ns 250M 0.1µs 2.5G 250M 0.25µs 250M Time base (/div) Sampling rate(S/s) 0.5µs 200M 1µs 200M 2.5µs...

  • Page 67: Appendix D: Daily Maintenance And Cleaning

    Appendix D: Daily Maintenance and Cleaning General Care DO not store or leave the instrument where the LCD display will be exposed to direct sunlight for long periods of time. CAUTION: To avoid damage to the instrument or probes, do not expose them to sprays, liquids, or solvents Cleaning If this instrument requires cleaning, disconnect it from all power sources and clean it with a mild detergent...

  • Page 68: Appendix E: Index

    Appendix E: Index - Width ............. 29 Position.............19 + Width ............29 Probe.............8, 12 AC Line ............17 Probe Attenuation Setting........9 Acquiring Signals system ........ 20 Probe Compensation...........8 Aliasing ............23 Probe component ..........53 Application of X-Y function ......58 Probe Safety............8 Auto ............

  • Page 69: Appendix F: Service And Warranty Information

    Appendix F: Service and Warranty Information Service Information Warranty Service: Please return the product in the original packaging with proof of purchase to the address below. Clearly state in writing the performance problem and return any leads, probes, connectors and accessories that you are using with the device. Non-Warranty Service: Return the product in the original packaging to the address below.
  • Page 70 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com © 2007 B&K Precision Corp. Edition 1.0 Printed in China...

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