Model: 2552, 2553, 2554, 2555, 2556, 2557, 2558, 2559 4CH/2CH Digital Storage Oscilloscopes USER MANUAL
Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation, service, and repair of this instrument. Before applying power, follow the installation instructions and become familiar with the operating instructions for this instrument. If this device is damaged or something is missing, contact the place of purchase immediately.
Do not attempt any internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present. DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT Do not install substitute parts or perform any unauthorized modifications to this instrument. Return the instrument to B&K Precision for service and repair to ensure that safety features are maintained.
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.
This symbol shows that the switch is a power switch located at the top of the oscilloscope. Pressing this button toggles the oscilloscope’s state between operation and power off mode. CAT I (400V) IEC Measurement Category I. Inputs may be connected to mains (up to 400 VAC) under Category I overvoltage conditions. NOTES: All references and functionality related to CH3 (channel 3) and CH4 (channel 4) in this manual are available on 4CH models 2553, 2555, 2557, and 2559.
Table of Contents SAFETY SUMMARY...................................................................... 3 CHAPTER 1 INTRODUCTION....................................................... 10 PANEL AND DISPLAY INFORMATION .................................................... 11 Front Panel ........................................................................................ 11 Back Panel......................................................................................... 12 Display Information .............
Signal Source ..................................................................................... 50 Trigger Type ...................................................................................... 50 Coupling ............................................................................................ 68 Position ............................................................................................. 68 Slope and Level ...............................................................................
APPLICATION OF X-Y FUNCTION....................................................... 138 ANALYZING A DIFFERENTIAL COMMUNICATION SIGNAL ....................... 139 CHAPTER 5 MESSAGE PROMPTS AND TROUBLESHOOTING....... 141 MESSAGE PROMPTS ...................................................................... 141 TROUBLESHOOTING ....................................................................... 142 CHAPTER 6 SPECIFICATIONS .................................................... 144 SPECIFICATIONS...............
Chapter 1 Introduction The 2550 series digital storage oscilloscopes (DSO) are portable benchtop instruments used for making measurements of signals and waveforms.
Panel and Display Information Front Panel The following contents are a brief introduction for the front panel function, which is useful to become familiar with the operation of the DSO.
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17.
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Rubber feet Kensington security slot Pass/Fail BNC output LAN interface USB device port (for remote communication) Rear USB host port (for storage to USB flash drives) Main AC power switch Input fuse holder AC line input Carrying handle Display Information 1 2 3 4 5 6 7 8 9 10 11 12 16 13 14 15 Figure 5 - Display Screen 1. Trigger status • Armed - The oscilloscope is acquiring pre-trigger data. All triggers are ignored in this state.
Trig’d - The oscilloscope has seen a trigger and is acquiring the post-trigger data. • Stop - The oscilloscope has stopped acquiring waveform data. • Auto - The oscilloscope is in auto mode and is acquiring waveforms in the absence of triggers. • Scan - The oscilloscope is acquiring and displaying waveform data continuously in scan mode.
13. 14. 15. 16.
Figure 6 - Scope Layout 2. Set the switch to 1X on the probe and connect the probe to channel 1 on the oscilloscope. To do this, align the slot in the probe connector with the key on the CH 1 BNC, push to connect, and twist to the right to lock the probe in place. Connect the probe tip and reference lead to the PROBE COMP connectors. Figure 7 - Probe Compensation 3. Press “AUTO” to show the 1 kHz frequency and about 3V peakpeak square wave in couple seconds.
Figure 8 - 3Vpp Square Wave 4. Press “CH1” two times to cancel the channel 1, Press“CH2” to change screen into channel 2, reset the channel 2 as step 2 and step 3. Do the same for 4CH models by pressing “CH3” and “CH4” for channel 3 and channel 4 respectively. Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock. Figure 9 - Probe 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. To avoid electric shock while using the probe, do not touch metallic portions of the probe head while it is connected to a voltage source. Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements. Probe Attenuation Probes are available with various attenuation factors which affect the vertical scale of the signal.
Probe Compensation As an alternative method to Probe Check, you can manually perform this adjustment to match your probe to the input channel. Figure 10 - Probe Compensation Setup 1. 2. 3. Set the Probe option attenuation in the channel menu to 10X. Do so by pressing CH1 button and selecting “Probe” from menu. Select 10X. Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope.
Chapter 2 Functions and Operating Descriptions This chapter will cover all the functions and operations of the oscilloscope: • Menu and control button • Connector • Auto Setup • Default Setup • Universal knob • Vertical System • Horizontal System • Trigger System • Acquiring signals System • Display System • Measuring waveforms System • Utility System • Storage System • Online Help function 20
Menu and Control Button Figure 11 - Control Buttons (4CH model shown) Channel buttons (CH1, CH2, CH3, CH4): Press a channel button (CH1, CH2, CH3, or CH4) to turn that channel ON or OFF and open the Channel menu for that channel. You can use the channel menu to set up a channel. When the channel is ON, the channel button is lit. MATH: Press to display the Math menu. You can use the MATH menu to use the oscilloscope’s Math functions. REF: Press to display the Ref Wave menu.
HORI MENU: Press to display the Horizontal menu. You can use the Horizontal menu to display the waveform and to zoom a segment of a waveform. TRIG MENU: Press to display the Trigger menu. You can use the Trigger menu to set the trigger type (Edge, Pulse, Video, Slope, Alternate and trigger settings. SET TO 50%: Press to stabilize a waveform quickly. The oscilloscope can set the trigger level to be halfway between the minimum and maximum voltage level automatically.
UTILITY: Press to open the Utility menu. You can use the Utility menu to configure oscilloscope features, such as sound, language, counter, etc. You can also view system status and update software. DEFAULT SETUP: Press to reset the oscilloscope’s settings to the default factory configuration. HELP: Enter the online help system. AUTO: Automatically sets the oscilloscope controls to produce a usable display of the input signals. RUN/STOP: Continuously acquires waveforms or stops the acquisition.
Note: Do not connect a voltage source to the ground terminal or it may damage the oscilloscope. Auto Setup The 2550 series Digital Storage Oscilloscopes have an Auto Setup function that identifies the waveform types and automatically adjusts controls to produce a usable display of the input signal.
Table 1 - Autoset Menu Option Description (Multi-cycle sine) Auto set the screen and display multi-cycle signal. Set the screen and auto display single cycle signal. (Single-cycle sine) Auto set and show the rising time. (Rising edge) Auto set and show the falling time. (Falling edge) Causes the oscilloscope to recall the previous setup.
VOLTS/DIV adjustability Signal inverted Coarse Horizontal position Center TIME/DIV Adjusted Trigger type Edge Trigger source Auto detect the channel which has the input signal Trigger slope Rising Trigger mode Auto Trigger coupling DC Trigger holdoff Minimum Trigger level Set to 50% Off Note: The AUTO button can be disabled. Please see “Appendix C Disabling Auto Function” for details. Default Setup The oscilloscope is set up for normal operation when it is shipped from the factory.
Universal Knob Figure 14 - Universal Knob You can use the Universal knob with many functions, such as adjusting the hold off time, moving cursors, setting the pulse width, setting the video line, adjusting the upper and lower frequency limit and adjusting X and Y masks when using the pass/fail function. You can also turn the Universal knob to adjust the storage position of setups, waveforms, pictures when saving/recalling, and to select menu options.
Vertical System The vertical control could be used for displaying waveform, rectify scale and position.
Channel Function Menu Table 3 - Channel Function Menu Option Setting Description Coupling DC DC passes both AC and DC components of the input signal. AC blocks the DC component of the input signal and attenuates signals below 10 Hz. GND disconnects the input signal. Disables bandwidth limit. Enables bandwidth limit. AC BW Limit GND Off On Volts/Div Coarse Fine Selects the resolution of the Volts/Div knob Coarse defines a 1-2-5 sequence.
Filter Press this button to enter the “Digital Filter menu”. Next Page Page 2/3 Press this button to enter the third page menu. Table 5 - Channel Function Menu 3 Option Setting Description Unit V Set the scale unit to voltage. A Set the scale unit to current. Skew 0 – 100 ns Set the skew time between two channels. Next Page Page 3/3 Press this button to return the first page menu.
Option Filter Setting Description On Off Turn on the digital filter. Turn off the digital filter. Type Setup as LPF (Low Pass Filter). Setup as HPF (High Pass Filter). Setup as BPF (Band Pass Filter). Setup as BRF (Band Reject Filter). Upp_limit Turn the “Universal” knob to set upper limit. Low_limit Turn the “Universal” knob to set lower limit. Return Return to digital filter main menu. • • “GND” Coupling: Use GND coupling to display a zero-volt waveform.
Setting Up Channels Each channel has its own separate Menu. The items are set up separately according to each channel. 1. Setup Channel Coupling Take CH1 for example; the tested signal is a sine wave signal with DC deflection: • Press“CH1”→“Coupling”→“AC”, Set to AC couple mode. This will block the DC component of the input signal. • Press“CH1”→“Coupling”→“DC”, Set to DC couple mode. Both DC and AC components of the input signal will be captured. • Press“CH1”→“Coupling”→“GND”, Set to GROUND mode.
Figure 17 - Bandwidth Limit 3. • Volts/Div Settings Vertical scale adjust have Coarse and Fine modes, Vertical sensitivity range of 2 mV/div – 10 V/div. Take CH1 for example: Press“CH1”→“Volts/Div”→“Coarse”. It is the default setting of Volts/Div, and it makes the vertical scaling in a 1-2-5-step sequence from 2 mV/div, 5 mV/div, 10 mV/div to 10 V/div.
• 4. Press CH1”→ Volts/Div”→ Fine”. This setting changes the vertical control to small steps between the coarse settings. It will be helpful when you need to adjust the waveform vertical size in smaller steps. Setting Probe Attenuation In order to set the attenuation coefficient, you need to specify it in the channel operation Menu. If the attenuation coefficient is 10:1, the input coefficient should be set to 10X, so that the Volts/div information and measurement testing is correct.
Figure 20- Invert Waveform Screen 6. Using the Digital Filter Press “CH1”→“Next Page page 1/2”→ “Filter”, display the digital filter menu. Select “Filter Type”, then select “Upper Limit” or “Lower Limit” and turn the “Universal” knob to adjust them. • Press “CH1”→“Next Page page 1/2”→ “Filter” →“Off”. Turn off the Digital Filter function. Figure 21 - Digital Filter Menu • Press “CH1”→ “Next Page page1/2”→ “Filter” → “On”. Turn on the Digital Filter function.
Figure 22 - Digital Filter Adjustment Screen Using Vertical Position Knob and Volts/div Knob • 1. 2. 3. • 1. 2. Vertical “POSITION” knob Use the Vertical “POSITION” knobs to move the channel waveforms up or down on the screen. This button’s resolution varies based on the vertical scale. When you adjust the vertical position of channel waveforms, the vertical position information will display on the bottom left of the screen. For example “Volts Pos=24.6mV”.
decrease by turning the knob in the counterclockwise direction. In Fine mode, the knob changes the Volts/Div scale in small steps between the coarse settings. Again, increase in the clockwise direction, decrease in the counterclockwise direction. Math Functions Math shows the results after +,-,*, /, and FFT operation between two channels, from CH1 to CH4 (CH3 and CH4 available for 4CH models only). Press the MATH button to display the math waveform and menu.
Table 8 - Math Function Description Operation Setting ＋ A+B － A-B Source A waveform adds Source B waveform. Source A waveform is subtracted from Source B waveform. * A*B Source A multiply Source B / FFT Description Source A divides Source B A/B Fast Fourier Transform. Figure 23- Math Waveform FFT Function The FFT process mathematically converts a time-domain signal into its frequency components.
• • • Show the Noise in a DC power supply Test the filter and pulse response in a system Analyze vibration Table 9 - FFT Function Menu 1 FFT Option Setting Description Source CH1, CH2, CH3*, CH4* Hanning Hamming Rectangular Blackman Select this channel as the FFT source. 1X 2X 5X 10X Changes the horizontal magnification of the FFT display. Window FFT ZOOM Next Page Page 1/2 *4CH models only Select FFT window types. Enter the second page of FFT menu.
5. The oscilloscope calculates the FFT spectrum using the center 1024 points of the time-domain waveform. 6. Turn the “Volts/div” knob to ensure that the entire waveform remains on the screen. 7. Turn the “Time/div” knob to provide the resolution you want in the FFT spectrum. 8. If possible, set the oscilloscope to display many signal cycles. To display FFT correctly, follow these steps: 1. Push the “MATH” button. 2. Set the “Operation” option to FFT. 3.
Figure 24 - Math Function Screen Set dBVrms to be the vertical Scale unit Time base scale Sampling rate Select FFT Window Windows reduce spectral leakage in the FFT spectrum. The FFT assumes that the YT waveform repeats forever. With an integral number of cycles, there are no discontinuities in the signal shape. A non-integral number of cycles in the YT waveform cause the signal start and end points to be at different amplitudes.
Hanning Hamming Blackman Better frequency, poorer magnitude accuracy than Rectangular. Hamming has slightly better frequency resolution than Hanning. Best magnitude, worst frequency resolution. spectrum. Sine, periodic, and narrow-band random noise. Asymmetric transients or bursts. Single frequency waveforms, to find higher order harmonics. Magnifying the FFT Spectrum You can magnify and use cursors to take measurements on the FFT spectrum.
7. 8. 9. 10. 11. 12. 13. 14. If FFT display on full screen, press CH1 button again to remove channel waveform display. Press the “CURSOR” button to enter “Cursor” menu. Press the “Cursor Mode” button to select “Manual”. Press the “Type” option button to select “Voltage”. Press the “Source” option button to select “FFT”. Press the “CurA” option button and turn the “Universal” knob to move Cursor A to the highest point of the FFT waveform.
Figure 26 - Measuring FFT Frequency NOTE： - The FFT of a waveform that has a DC component or offset can cause incorrect FFT waveform magnitude values. To minimize the DC component, choose AC Coupling on the source waveform. - To display FFT waveforms with a large dynamic range, use the dBVrms scale. The dBVrms scale displays component magnitudes using a log scale. - The Nyquist frequency is the highest frequency that any real-time digitizing oscilloscope can acquire without aliasing.
Using REF The reference control saves waveforms to a nonvolatile waveform memory. The reference function becomes available after a waveform has been saved. Table 12 - REF Function Menu Option Setting Description Source CH1,CH2, *CH3, *CH4 CH1 off CH2 off *CH3 off *CH4 off Choose the waveform display to store. REFA REFB *REFC *REFD Save Choose the reference location to store or recall a waveform. Stores source waveform to the chosen reference location.
Figure 27 - Reference Waveform Menu Operation step: 1. Press the “REF” menu button to display the “Reference waveform menu”. 2. Press the “Source” option button to select input signal channel. 3. Turn the vertical “POSITION” knob and “Volts/div” knob to adjust the vertical position and scale. 4. Press the third option button to select “REFA” or “REFB” as storage position. 5. Press the “Save” option button. 6. Press the bottom option button to select “REFA On” or “REFB On” to recall the reference waveform.
Horizontal System Shown below, there is one button and two knobs in the HORIZONTAL area. Table 13 - Horizontal System Function Menu Option Delayed Setting On Off Description Turn on this function for main timebase waveform to display on the top half screen and window timebase waveform to display on the below half screen at the same time. Turn off this function to only display main timebase waveform on the screen.
1. 2. Used to change the horizontal time scale to magnify or compress the waveform. If waveform acquisition is stopped (using the RUN/STOP or SINGLE button), turn the Time/div knob to expand or compress the waveform. Select the horizontal Time/div (scale factor) for the main or the window time base. When Window Zone is enabled, it changes the width of the window zone by changing the window time base.
Figure 28 - Horizontal Delay Menu 4. Turn the “Horizontal Position” knob (adjust window’s position) to select the window that you need and expanded window waveform display will show on the below half of the screen at the same time. Trigger System The trigger determines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, the oscilloscope converts unstable displays or blank screens into meaningful waveforms.
• signal to the EXT TRIG BNC and set the trigger source to Ext or Ext/5. “FORCE Button: Use the FORCE button to complete the current waveform acquisition whether the oscilloscope detects a trigger or not. This is useful for SINGLE acquisitions and Normal trigger mode. Signal Source You can use the Trigger Source options to select the signal that the oscilloscope uses as a trigger.
EXT Does not display the trigger signal; the Ext option uses the signal connected to the EXT TRIG frontpanel BNC and allows a trigger level range of 1.2 V to +1.2 V. EXT/5 Same as Ext option, but attenuates the signal by a factor of five, and allows a trigger level range of +6 V to -6 V. This extends the trigger level range. This selection uses a signal derived from the power line as the trigger source; trigger coupling is set to DC and the trigger level to 0 volts.
AC HF Reject LF Reject Holdoff Holdoff Blocks DC components, attenuates signals below 25 Hz. Attenuates the high-frequency components above 150 kHz. Blocks the DC component attenuates the lowfrequency components below 8 kHz. Using the “universal” knob to adjust holdoff time (sec), the holdoff value is displayed. Reset holdoff time to 100 ns. Reset Return Return to the first page of “Trigger main menu”. Figure 29 - Trigger Menu Screen Operating Instructions: 1.
Press the “Slope” option button to select “ ”,“ ” or “ ”. 4. Set up Trigger mode Press the “Trigger mode” option button to select “Auto”, “Normal”, “Single”. Auto: The waveform refreshes at a high speed whether the trigger condition is satisfied or not. Normal: The waveform refreshes when the trigger condition is satisfied and waits for next trigger event occurring when the trigger condition is not satisfied.
When (Positive pulse width less than pulse width setting) (Positive pulse width larger than pulse width setting) Select how to compare the trigger pulse relative to the value selected in the Set Pulse Width option. (Positive pulse width equal to pulse width setting) (Negative pulse width less than pulse width setting) (Negative pulse width larger than pulse width setting) Set Width (Negative pulse width equal to pulse width setting) 20.0 ns~10.0 s Next Page Page 1/2 Select to set up pulse width.
Table 17 - Pulse Trigger Function Menu 2 Option Type Setting Pulse Description Select the pulse to trigger the pulse matching the trigger condition. Mode Auto Normal single Select the type of triggering. Normal mode is best for most Pulse Width trigger applications. Set up Enter the “Trigger setup menu”. Next Page Page 2/2 Press this button to return to the first page. Figure 31 - Pulse Trigger Menu 2 Operating Instructions: 1.
Video Trigger Trigger on fields or lines of standard video signals. Table 18 - Functional Menu of Video Trigger 1 *Available for 4CH models only. Option Type Setting Video Source CH1 CH2 *CH3 *CH4 EXT EXT/5 Polarity Description Select the video type trigger. Set the coupling to AC to trigger the NTSC, PAL and SECAM video signal. Select the input source to be the trigger signal. Ext and Ext/5 use the signal applied to the EXT TRIG connector as the source.
Figure 32 - Video Trigger Screen Table 19 - Functional Menu of Video Trigger 2 Option Type Setting Video Standard NTSC Pal/Secam Auto Mode Description Select the video type trigger. Set the coupling to AC to trigger the NTSC, PAL and SECAM video signal. Select the video standard for sync and line number count. Use this mode to let the acquisition free-run in the absence of a valid trigger. This mode allows an untriggered, scanning waveform at 100 ms/div or slower time base setting.
first trigger. When you want the oscilloscope to acquire a single waveform, press the “SINGLE” button. Enter the “Trigger setup menu”. Return to the first page of “Video Trigger menu”. Single Set up Next Page Page 2/2 Figure 33 - Video Trigger Menu 2 Operating Instructions: Set up Type 1. Press the “TRIG MENU” button to display “Trigger” menu. 2. Press the “Type” option button to select “Video”. Set up Polarity ” or “ ”. 1. Press the “Polarity” option button to select “ Set up Synchronization 1.
2. Press the “Standard” option button to select “PAL/SECAM” or “NTSC”. Slope Trigger Trigger on positive slope or negative slope according to setup time of the oscilloscope. Table 20 - Slope Trigger Function Menu 1 Option Type Setting Slope Source CH1 CH2 *CH3 *CH4 EXT EXT/5 When Time Next Page Description Trigger on positive slope or negative slope according to setup time of the oscilloscope. Select trigger source. Select trigger condition. Turn the “Universal” knob to set slope time.
Figure 34 - Slope Trigger Menu Table 21 - Slope Trigger Function Menu 2 Option Type Setting Slope Vertical Mode Description Trigger on positive slope or negative slope according to setup time of the oscilloscope. Select the trigger level that can be adjusted by “LEVEL” knob. You can adjust “LEVEL A”, “LEVEL B” or adjust them at the same time.
Normal Single Set up Next Page Page 2/2 free-run in the absence of a valid trigger. This mode allows an untriggered, scanning waveform at 100 ms/div or slower time base setting. Use this mode when you want to see only valid triggered waveforms. When you use this mode, the oscilloscope does not display a waveform until after the first trigger. When you want the oscilloscope to acquire a single waveform, press the “SINGLE” button.
3. 4. 5. Press the “TRIG MENU” button to enter “Trigger menu”. Press the “Type” option button to select “Slope”. Press the “Source” option button to select “CH1”, “CH2”, “CH3”, or “CH4”. (CH3 and CH4 available for 4CH models only) 6. Press the “When” option button to select “ ”, “ ”, “ ”, “ ”, “ ” or “ ”. 7. Press the “Time” button and turn the “Universal” knob to adjust slope time. 8. Press the “Next Page - Page 1/2” option button to enter the second page of the “Slope trigger menu”. 9.
Table 22 - Set Trigger Mode to Edge Trigger Function Menu 1 Option Setting Description Type Alternate Channels CHX-CHY Source CH1, CH2, *CH3, *CH4 The trigger signal comes from two vertical channels when you use alternative trigger. In this mode, you can observe two irrelative signals at the same time. Select any two channels from CH1, CH2, *CH3, or *CH4 as the sources for alternating trigger. Selects the source channel. Mode Edge Set trigger type of the vertical channel signal to Edge.
Table 23 - Set Trigger Mode to Pulse Trigger Function Menu 1 Option Setting Description Type The trigger signal comes from two vertical channels when you use alternative trigger. In this mode, you can observe two irrelative signals at the same time. Select any two channels from CH1, CH2, *CH3, or *CH4 as the sources for alternating trigger. Alternate Channels CHX-CHY Source CH1, CH2, *CH3, *CH4 Mode Pulse Next Page Page 1/2 Selects the source channel.
Table 25 - Set Trigger Mode to Video Trigger Function Menu 1 Option Type Setting Alternate Description The trigger signal comes from two vertical channels when you use alternatee trigger. In this mode, you can observe two unrelated signals at the same time. Select any two channels from CH1, CH2, *CH3, or *CH4 as the sources for alternating trigger. Channels CHX-CHY Source CH1, CH2, *CH3, *CH4 Selects the source channel. Mode Video Set trigger type of the vertical channel signal to Video trigger.
Standard NTSC Pal/Secam Set up Next Page Select the video standard for sync and line number count. Enter the “Trigger Setup Menu” Page 2/2 Enter the second page of Alternatetrigger menu. Table 27 - Set Trigger Mode to Slope Trigger Function Menu 1 Option Setting Description Type Alternative Channels CHX-CHY Source CH1, CH2, *CH3, *CH4 The trigger signal comes from two vertical channels when you use alternative trigger. In this mode, you can observe two irrelative signals at the same time.
Vertical Select the trigger level that can be adjusted by “LEVEL” knob. You can adjust “LEVEL A”, “LEVEL B” or adjust them at the same time. Selections depend on slope trigger condition. Set up Enter the “Trigger setup menu”. Next Page Page 2/2 Return to the first page of “Alternate trigger menu”. Operation Instructions: To observe two irrelative channel signals, follow these steps ： 1. Input two irrelative signals to channel 1 and channel 2. 2. Press the AUTO button. 3.
Coupling Use “Coupling” to make sure the signal passes through the trigger circuit. It is useful for obtaining a steady waveform. If you use trigger coupling, you should press the “TRIGGER” button and then select “Edge”, “Pulse”, “Video”, or “Slope” trigger. Then select the “coupling” option in the “Set Up menu”. Position The horizontal position control establishes the time between the trigger position and the screen center.
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. ● Normal Polarity Sync triggers always occur on negative-going horizontal sync pulses. If the video waveform has positive-going horizontal sync pulses, use the Inverted Polarity selection.
“Trigger setup menu”. 4. Press the “Holdoff” option button and turn the “Universal” knob to change the holdoff time until the waveform triggers steadily. Note ： ● Use trigger holdoff to help stabilize the display of a periodic waveform. Signal Acquisition System Shown below is the “ACQUIRE” button for entering the menu for “Acquiring Signals”. Table 29- Acquiring Signals Function Menu Option Setting Description Acquisition Sampling Use for sampling and accurately display most of the waveform.
Sa Rate Displays system sampling rate. When you acquire a signal, the oscilloscope converts it into digital form and displays a waveform. The acquisition mode defines how the signal is digitized and the time base setting affects the time span and level of detail in the acquisition. • Sampling: In this acquisition mode, the oscilloscope samples the signal in evenly spaced intervals to construct the waveform. This mode accurately represents signals most of the time.
Figure 40 - Peak Detect • Average: The oscilloscope acquires several waveforms, averages them, and displays the resulting waveform. Advantage: You can use this mode to reduce random noise. Figure 41 - Acquisition Averaging Screen • • Equivalent Time Sampling: The equivalent time sampling mode can achieve up to 50 GSa/s. This mode is useful for observing repetitive waveforms. Real Time Sampling: The oscilloscope’s maximum real-time sampling rate is 2 GSa/s.
• • • • “RUN/STOP” Button: Press the RUN/STOP button when you want the oscilloscope to acquire waveforms continuously. Press the button again to stop the acquisition. “SINGLE” Button: Press the SINGLE button to acquire a single waveform. Each time you push the SINGLE button, the oscilloscope begins to acquire another waveform. After the oscilloscope detects a trigger it completes the acquisition and stops.
Operating Instructions: Set up Sampling Format You can press the “Acquisition” option button or turn the “Universal” knob to select “Sampling” mode, “Peak Detect” mode or “Average” mode. Set up Averages When you select “Average” format, you can press the “Averages” option button to select “4”, “16”, “32”, “64”, “128” or “256”. Set up function interpolation You can select Sinx interpolation or linear interpolation.
Set up Sampling mode Press the “Mode” option button to select “Real Time” or “Equ Time”. Set up Sampling rate Adjust the sampling rate by pressing the “Sa Rate” option button and turning the Time/div front panel knob. The sampling rate is shown at the corresponding timebase scale. Display System The display function can be setup by pressing the “DISPLAY” button.
Figure 45 - Display Menu Screen Table 31 - Display System Function Menu 2 Option Format Setting YT Description YT format displays the vertical voltage in relation to time (horizontal scale). XY format displays a dot each time a sample is acquired on channel 1 and channel 2. Set to normal mode. Set to invert color display mode. Display grids and axes on the screen. Turn off the grids. Turn off the grids and axes.
Next Page 20sec Infinite Page 2/3 Press this button to enter the second page of “Display menu”. Figure 46 - Display Menu 2 Table 32 - Display System Function Menu 3 Option Skin Next Page Setting Classical Modern Tradition Succinct Page 3/3 Description Set up screen style. Press this button to return to the first page.
Operation Introduction: Setup waveform display type 1. Press the “DISPLAY” button to enter the “Display” menu. 2. Press the “Type” option button to select “Vectors” or “Dots”. Set up Persist Press the “Persist” option button to select “Off”, “1 Sec”, “2 Sec”, “5 Sec” or “Infinite”. You can use this option to observe some special waveforms. Figure 47 - Persist Screen Setup Intensity Press the “Intensity” option button and turn the “Universal” knob to adjust waveforms’ intensity.
Setup Grid Press the “Grid” option button to select “ ”, “ ”or“ ”to set the screen whether to display grid or not. Setup Menu Display Press the “Menu Display” option button to select “2 sec”, “5 sec”, “10 sec”, “20 sec”, or “Infinite” to set menu display time on screen. Set Skin Press the “skin” option button or turn the “Universal” knob to select “Classical”, “Modern”, “Traditional”, or “Succinct”. X-Y Format Use the XY format to analyze phase differences, such as those represented by Lissajous patterns.
● ● ● ● ● Auto (resets display format to YT) Trigger Control Horizontal Position Knob Vector Display Type Scan Display Note: When the display type is set to Vector, the oscilloscope connects the sample points by using digital interpolation. Interpolation mode contains linear interpolation and sin(x)/x interpolation. Sin(x)/x interpolation is suitable for reconstructing curved or irregular wave shapes, especially when the sample rate is 3 to 5 times the system bandwidth or at faster time base settings.
Cursor Measurement The cursor measurement has three modes: Manual, Track, and Auto Measure. Manual Mode Table 33 - Manual Cursor Function Menu Option Cursor Mode Type Setting Manual Source CH1 CH2 *CH3 *CH4 MATH/FFT REFA REFB *REFC *REFD Cur A Voltage Time Cur B *Available for 4CH models only. Description Manually adjust cursors for measurement. Use cursor to measure voltage parameters. Use cursor to measure time parameters. Select input signal channel.
• • • 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. Cursor Moving: Use the “Universal” knob to move cursor 1 and cursor 2. They will be moved when the corresponding cursor options are selected, and the cursor value will display on the bottom left and top left of the screen when you move the cursor.
Figure 48 - Cursor Menu Track Mode Table 34- Track Mode Function Menu Option Cursor Mode Cursor A Cursor B Cur A Setting Track CH1 CH2 *CH3 *CH4 NONE CH1 CH2 *CH3 *CH4 NONE Cur B *Available for 4CH models only. Description In this mode, set track cursor measure. Set the input signal channel that the Cursor A will measure. Set the input signal channel that the Cursor B will measure. Select this option, turn the “Universal” knob to adjust horizontal coordinate of Cursor A.
horizontal position on the waveform by turning the “Universal” knob. The oscilloscope displays the values on the top left of the screen. To do track cursor measurement, follow these steps: 1. Press CURSOR button to enter the cursor measure function menu. 2. Press the “Cursor Mode” option button to select “Track”. 3. Press the “Cursor A” option button to select the input signal channel. 4. Press the “Cursor B” option button to select the input signal channel. 5.
Figure 49 - Cursor Menu Auto Mode Table 35 - Auto Mode Function Menu Option Cursor Mode Setting Auto Description Set to auto cursor measure mode. This mode will take effect with automatic measurements. The instruments will display cursors while measuring parameters automatically. To do auto cursor measurements, follow these steps: 1. Press the CURSOR button to enter “Cursor measure menu”. 2. Press the “Cursor Mode” option button to select “Auto”.
Figure 50 - Auto Mode Auto Measurement When you take automatic measurements, the oscilloscope does all the calculation for you. The measurements use all the recorded points in the memory, which are more accurate than measurements made using the graticule lines or cursor measurements because these measurements are confined to be made by only using points on the display and not all the data points recorded by the oscilloscope. Press the ‘MEASURE’ button for Automatic Test.
Figure 51 - Auto Measure Menu 1 Table 37 - Auto Measurement Function 2 - Voltage Measurement Menu Option Source Setting CH1, CH2, *CH3, *CH4 Type Vpp, Vmax, Vmin, Vamp, Vtop, Vbase, Vavg, Mean, Vrms, Cycle Vrms, FOVShoot, FPREShoot, ROVShoot, RPREShoot, Description Select input signal source for Voltage measurement. Press the “Type” button or turn the “Universal” knob to select Voltage measurement parameter.
Table 38 - Auto Measurement Function 3 - Time Measurement Menu Option Source Setting CH1, CH2, *CH3, *CH4 Type Freq, Period, +Width, Width, Rise Time, Fall Time, BWidth, +Duty, -Duty Return Description Select input signal source for Time measurement. Press the “Type” button or turn the “Universal” knob to select Time measurement parameter. Display the corresponding icon and measurement value of your selected time measurement parameter. Return to the first page of auto measurement menu.
Return Return to the first page of auto measurement menu. *Available for 4CH models only. Table 40 - All Measurement Function Menu Option Source Voltage Setting CH1 CH2 *CH3 *CH4 On Off Description Select input signal channel. Turn on the all measurement function to measure voltage parameters. Turn of the all measurement function to measure voltage parameters. Time On Turn on the all measurement function to Off measure Time parameters. Turn of the all measurement function to measure Time parameters.
Vtop Vbase Vavg Mean Crms Vrms ROVShoot Measures the highest voltage over the entire waveform. Measures the lowest voltage over the entire waveform. The arithmetic mean over the first cycle in the waveform. The arithmetic mean over the entire waveform. The true Root Mean Square voltage over the first cycle in the waveform. The true Root Mean Square voltage over the entire waveform. Defined as (Vmax-Vhig)/Vamp after the waveform rising.
- Wid -Width Measures the time between the first falling edge and the next rising edge at the waveform 50% level. + Duty Measures the first cycle waveform. Positive Duty Cycle is the ratio between positive pulse width and period. －Duty Measures the first cycle waveform. Negative Duty Cycle is the ratio between negative pulse width and period. Phase The amount one waveform leads or lags another in time. Expressed in degrees, where 360 degrees comprise one waveform cycle.
2. 3. 4. 5. 6. Press the first option button to enter the “second measurement menu”. Select measure type. If you press the “Voltage” option button, “Voltage measurement” menu will display on the screen. Press the “Source” option button to select “CH1”, “CH2”, “CH3”, or “CH4” according to input signal channel. (CH3 and CH4 available for 4CH models only) Press the “Type” option button to select the parameter type that you want to measure.
Figure 52 - Measuring Time Parameters Storage System Shown below, the “SAVE/RECALL” button enters the “Storage System Function Menu”. The scope can save and recall up to 20 instrument settings and 20 waveforms to its internal memory. There is a USB host port on the front and rear panel of the oscilloscope where you can save setup data, waveform data, waveform interface image, and CSV file to a USB flash drive.
Figure 53 - Save All Menu Screen 1 Figure 54 - Save All Menu Screen 2 Recalling Files The Load button is used to recall your setup files. Once you have navigated to the desired file and it is highlighted in the main screen area, press the Load option button and the setup is recalled from the USB flash drive. Note: The Load button option is disabled (grayed-out) when .BMP or .CSV file types are selected.
Both Directory and Files have Rename and Return option buttons on Page2/2. Use these buttons to give an existing folder or file a new name or to exit the SAVE/RECALL screen, respectively. Figure 55 - Rename Screen Creating Folders and Files Create new folders and files by pressing the New Folder or New File option button.
• • • • • The New File menu options are the same as the New Folder menu. The InputChar option button adds the selected character to the cursor position in Name field. Move the cursor position in the name field using the “→” and “←” option buttons. Turn the “Universal” knob to move through character selections. When the desired character is highlighted, press the “Universal” knob or press the “InputChar” option button to add it to the specific position in the Name field.
Figure 57 - Save/Rec Menu To save setups to the oscilloscope’s internal memory, follow the steps below: For example: Save setup that set waveform display type to “Dots” to internal memory. 1. Press the “SAVE/RECALL” button to enter the “SAVE/RECALL” menu. 2. Press the “Type” option button to select “setups”. 3. Press the “Save to” option button to select “Device”. 4. Press the “Setup” option button to select “No.1”. 5. Press the “DISPLAY” button to enter the “Display” menu. 6.
• Save Setup to USB Flash Drive Table 43 - Save Setup to USB Flash Drive Function Menu Option Setting Description Type Setups Menu for the Storage/Recall settings. Save to File Save setup data to USB flash drive. Save Go to the Save/Recall interface Figure 58 - Save Setup Screen Save Setup to USB Flash drive: For example: Save setup that set waveform display type to “Dots” to USB flash drive. 1. Press the “SAVE/RECALL” button to select “Setups”. 2.
5. 6. 7. 8. 9. 10. Press the “New folder” button to create a new folder Press the “Del folder” option button to delete a folder Press the “Modify” option button to modify a folder. Press the “New file” option button to create a new file Press the “Del file” option button to delete a file Press “the next page” option button and press the “Rename” option button to modify the name of the file or the folder. 11.
Figure 59 - Set Factory Default Screen Save/Recall Waveform Save Waveforms to Device Table 45 - Save Waveform to Device Function Menu Option Setup Description Type Waveforms Selects Waveform for saving/recalling. Save to Device Save waveforms to the oscilloscope’s internal memory. Waveform No.1 to No.20 Press the “Waveform” option button or turn the “Universal” knob to select storage location. Save waveform to the selected storage location.
Figure 60 - Save Waveform Menu Screen To save waveforms in internal memory, follow the steps below: 1. Input a sine signal to channel 1 and press the “Auto” button. 2. Press the “SAVE/RECALL” button to enter “SAVE/RECALL” display menu. 3. Press the “Type” option button to select “Waveforms”. 4. Press the “Save to” option button to select “Device”. 5. Press the “Waveform” option button or turn the “Universal” knob to select “No.1”. 6.
Save Waveforms to USB Flash Drive Table 46 - Save Waveforms to USB Flash Drive Function Menu Option Setup Description Type Waveforms Save to File Menu for the Storage/Recall waveforms. Select save location to USB flash drive. Select to save to USB. Save Figure 61 - Save Waveforms Screen To save waveforms to a USB flash drive, follow the steps below: 1. 2. 3. 4. 5. 6. 7. Input a sine signal to channel 1, press the “AUTO” button.
there will be a message “Save data success” displayed on the screen). Now the waveform data have been saved to the USB flash drive. Recall waveforms from USB flash drive, follow next steps: 1. Press the “SAVE/RECALL” button. 2. Press the “Type” button to select “Waveforms”. 3. Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive (within ten seconds). 4. Press the “Save to” option button to select “File”. 5.
Figure 62 - Save Picture Screen To save waveform images to USB flash drive, follow the steps below: 1. Select the screen image that you want. 2. Press the “SAVE/RECALL” button to enter “SAVE/RECALL” menu. 3. Press the “Type” option button to select “Picture”. 4. Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized the USB flash drive (about five seconds). 5.
.CSV file. Data Depth Displayed Maximum Para Save Save On Off Set to store displayed waveform data to .CSV file. Set to store maximum waveform data to .CSV file. Set whether to include waveform parameters in the .CSV file or not. Go to the SAVE ALL menu. Figure 63 - Save to CSV Screen To save CSV files to USB flash drive, follow the steps below: 1. Press the “SAVE/RECALL” button to enter “SAVE/RECALL” menu. 2. Press the “Type” option button to select “CSV”. 3.
Note: The maximum number of data points of a waveform that can be saved as a .CSV file into USB drive is ~24576 pts (depending on the timebase setting) when data depth is set to maximum. The actual number depends on the time base setting, the channels that are active, and whether data depth is set to “display” or “maximum”. See below table for maximum data points available in each timebase when data depth is set to maximum.
Utility System Press the UTILITY button from the front panel to access utility options. Table 49 - Utility System Function Menu 1 Option Setting Description System Status Displays summaries of the oscilloscope settings. Sound Open the key-press voice. Close the key-press voice. Counter On Off Turn on Frequency Counter Turn off Frequency Counter.
Figure 64 - Utility Menu Screen 1 Table 50 - Utility System Function Menu 2 Option Setting Do Self Cal Do Self Test Auto self calibration. Screen Test Keyboard Test LED Test Print Setup Back USB Next Page Description Run the screen test program Run the keyboard test program Run the LED test program. Not available. USBTMC Page 2/4 Configures the USB port to USBTMC interface. Use this for remote communication via SCPI. Press this button to enter third page.
Figure 65 - Utility Menu Screen 2 Table 51 - Utility System Function Menu 3 Option Setting Description Update firmware Update the firmware of the oscilloscope using a USB flash Drive. Pass/Fail Pres this button to enter the “Pass/Fail menu”. Press this button to enter the waveform record menu. Press this button to enter the “IP Setting menu” (Currently not used) Press this button to enter first page.
Recorder Date/Time Quick-Cal Return Record Replay Option On Off Option Setting Year 2000-2099 Month/Day 00/00 Hour/Minute 00/00 Display ON OFF Confirm Goes into the “recorder” menu to start waveform record. Playback recordings Recording options Sets the date and time on the instrument. Enable or disable quick calibration. Returns to previous menu Description Set the current display year using the universal knob. Set the current display month and day using the universal knob.
System Status Press the “System Status” option button of the Utility Menu to view the oscilloscope’s hardware and software configuration. Figure 66 - System Status Info Screen Table 53 - System Status Information Option Description Startup Times Lists the number of startup times. Software Version Lists the software version. Hardware Version Lists the hardware version. Product Type Lists the product model. Serial No. Lists the product serial number.
Figure 67 - Language Selection Screen Self Calibration Self Calibration procedure can optimize the signal path for optimal measurement results. You can run this procedure at any time. If the operating temperature changes by more than 5° C or the instrument runs more than thirty minutes, running self calibration is recommended. When you run the self Calibration, you must disconnect all the probes and leads, and make sure the scope is not in Single-Shot mode.
Figure 68 - Calibration Screen Self Test Press “UTILITY” and select “Do Self Test” Table 54 - Self Test Menu Option Description Screen Test Run Screen Test Program. Keyboard Test LED Test Run Keyboard Test Program. Run LED Test Program. Screen Test Select “Screen Test” to enter the screen test interface. The message “Press ‘SINGLE’ Key to continue, Press ‘RUN/STOP’ Key to exit” is displayed. Press “Single” button to run through the screen color test, or press “Run/Stop” to exit.
Figure 69- Screen Test Start Screen Keyboard Test Select “Keyboard Test” to enter the key test interface. The on-screen shapes represent the front panel keys. The shapes with two arrows beside them represent the front panel knobs. The squares represent the knob presses for scale knobs. Test all keys and knobs to verify that all the backlit buttons illuminate correctly. Note ： • When you first enter the test, the screen will display all on-screen shapes in white color.
Figure 70 - Key Test Screen LED Test Select “LED Test” to test the LED backlights on some of the front panel buttons. The screen will display key shapes that represent all the buttons of the front panel. Follow the instruction prompt below and “Press ‘SINGLE’ Key to continue , Press ‘RUN/STOP’ Key to exit”. Each time “SINGLE” key is pressed, a key shape on the screen will turn green, indicating that the corresponding key or indicator should be lid up. Press “SINGLE” again to test another key backlight.
Figure 71 - LED Test Screen Updating Firmware • Using USB flash drive to update firmware The firmware of the oscilloscope can be updated directly via a USB Flash drive. This process takes about two minutes. To update, follow the steps below: 1. Download and save the firmware file onto a USB flash drive. 2. Insert the USB Flash Drive to the USB Host interface on the front panel of the oscilloscope. 3. Press the “UTILITY” button to enter the “Utility menu”. 4.
WARNING: Do NOT turn off the power while the oscilloscope is updating. Otherwise, the firmware will be corrupted, and the instrument may not be able to reboot again. Pass/Fail The Pass/Fail function can monitor changes of signals and output pass or fail signals by monitoring the input signal and checking if it is within the predefined mask or not. Table 55 - Pass/Fail Function Menu 1 Option Enable Source Setting On Off CH1 CH2 CH3 CH4 Operate Description Turn on Pass/Fail function.
Figure 72 - Pass/Fail Screen 1 Table 56 - Pass/Fail Function Menu 2 Option Output Setting Pass Fail Stop On Output On Off Mask Setting Return Next Page Page 2/2 Description Output signal when pass condition is detected. Output signal when fail condition is detected. When On, it stops the test when an output occurs. When Off, it continues to test when an output occurs. Press this button to enter the “Mask Setting menu”. Return to the Pass/Fail main menu. Return the first page of the Pass/Fail menu.
Figure 73 - Pass/Fail Screen 2 Table 57 - Mask Setting Function Menu 1 Option X Mask Setting xdiv Y Mask ydiv Create Mask Location Next Page Description Turn the “Universal” knob to set the range of horizontal clearance to the waveform. <0.04div4.00div> Turn the “Universal” knob to set the range of vertical clearance to the waveform. <0.04div-4.00div> Create a test mask according to the above clearance. Internal External Page 1/2 Select position to store created mask.
Figure 74 - Mask Menu Screen 1 Table 58 - Mask Setting Function Menu 2 Option Save Setting Description Store created mask setting. Load Recall stored mask setting. Return Return to the main menu of mask setting. Return to the first page of the “Mask Setting menu”.
RUN Pass/Fail test, please follow the steps below: 1. 2. 1. Press UTILITY button to enter the “Utility menu”. Press the “Next Page Page1/4” option button. Press the “Next Page Page2/4” option button to enter the third page of “Utility menu”. 2. Press the “Pass/Fail” option button to enter the “Pass/Fail” function menu. 3. Press the “Enable Test” option button to select “On”. 4. Press the “Source” option button to select input signal channel. 5.
Mode Record Play Back Storage Off Source CH1 CH2 *CH3 *CH4 P/F-OUT Interval End Frame Operate (Record) (Stop) *Available for 4CH models only. Set Record function menu. Set Play Back function menu. Set Storage function menu. Turn off waveform recorder menu. Select record source channel. Set time interval between record frames. Set max number of record frames. Press to start recording. Press to stop recording.
To record waveforms, follow these steps: 1. 2. 3. 4. 5. 6. 7. 8. Press the UTILITY button to enter “Utility menu”. Press the “Next Page” option button to enter the third page of “Utility menu”. Press the “Record” button to enter “Waveform Record Menu”. Press the “Mode” option button to select “Record”. Press the “Source” option button to select the input signal channel. Select “Interval” option and turn the “Universal” knob to adjust time interval between record frames.
Figure 77 - Record Menu Screen 2 Table 61 - Waveform Playback Function Menu 2 Option Start Frame Curr_Frame Setting End Frame Return Next Page Page 2/2 Description Set start frame. Select current frame to be played. Set End frame. Press to return to the waveform recorder main menu. Return to the first page of Play Back function menu.
Figure 78 - Record Menu Screen 3 To play back current record waveforms, follow these steps: 1. Press UTILITY button to enter “Utility menu”. 2. Press the “Mode” option button to select “Play Back”. ” or “ 3. Press the “Play Mode” option button to select “ ”. 4. Press the “Interval” option button to select time interval between play back frames. 5. Press the “Next Page 1/2” to enter the second page of “Play Back function menu”. 6.
Record This mode allows for gap-free recording of waveform data and can be enabled in SCAN MODE only (refer to “Horizontal Control Knob section”). It is similar to the above described waveform recorder mode, however the recorded data can only be played back on-screen, but cannot be retrieved. Maximum recordable data depends on the timebase in scan mode. Recorded data can also be stored into external USB flash drive.
Store Mode Memory USB key Return Option Continue/Pause Restart Previous Next Return used to store the recording. Stores recording to internal memory. Stores recording to external USB flash drive. Return to the Recording Menu. Description Continue/Pause when playing back a waveform recording. Restart the playback of the recorded waveform. Recall the waveform recording. Fast forward play the recalled waveform recording. Return to the Recording Menu.
Split Record Mode Display split screen of the waveform recording and channel recalling, CH1 is displayed in the upper halfscreen, and CH2 is displayed in the lower half-screen. For 4CH models, CH1 and CH2 are displayed in the upper halfscreen, and CH3 and CH4 are displayed in the lower halfscreen. Recorder saves the channel waveform persistently, the latter waveform will cover the former. Recorder will stop waveform saving when its memory is full.
Recorder Operation step： 1. Press the UTILITY button to enter “Utility” menu. 2. Press the “Next Page” option button to enter the fourth page of “Utility” menu. 3. Press the “Recorder” button to enter the Recorder menu. 4. Press the “Option” button to set Recorder options. 5. Press the “Record” button to enter the Record menu and then press “Start” button to start recording waveform 6. After finished recording waveform, then Press the “Replay” button to view the recorded waveform.
Figure 82 - Help Menu Screen 130
Chapter 3 Remote Control The 2550 series digital storage oscilloscope comes with Easyscope application software which provides most of the controls that emulate the front panel of the instrument. The rear panel USB device port is used to connect to a computer to allow for remote communication with the software. The Easyscope software is free and can be downloaded at www.bkprecision.com Remote communication commands are also supported via both the USB device interface and the LAN interface.
Chapter 4 Application Examples This section presents a series of application examples. These simple examples highlight the features of the oscilloscope and give you ideas for using it to solve your own test problems.
Taking Simple Measurements Observe an unknown signal in a circuit, display the signal quickly and measure the frequency and peak-to-peak amplitude. 1. Using Auto set To quickly display a signal, follow these steps: - Press the CH1 button, set the Probe option attenuation to 10X and set the switch to 10X on the probe. - Connect the channel 1 probe to the signal. - Press the AUTO button. - The oscilloscope sets vertical, horizontal, and trigger controls automatically.
5. Press the “Type” option button to select “Vpp”. The corresponding icon and measure value will display on the third option area. Measuring Ring Frequency To measure the ring frequency at the rising edge of a signal, follow these steps: 1. Press the “CURSORS” button to see the “Cursor Menu”. 2. Press the “Mode” button to select “Manual”. 3. Press the “Type” option button and select “Time”. 4. Press the “Source” option button and select“CH1”. 5.
Measuring Ring Amplitude To measure the amplitude, follow these steps: 1. Press the “CURSORS” button to see the Cursor Menu. 2. Press the “Mode” button to select “Manual”. 3. Press the “Type” option button and select “Voltage”. 4. Press the “Source” option button and select “CH1”. 5. Press the “CurA” option button and turn the universal knob to place the cursor A on the highest peak of the ring. 6.
The following steps show you how to use the oscilloscope to capture a single event. 1. Set the Probe option attenuation to 10X and set the switch to 10X on the probe. 2.
Separating the Signal from Noise To reduce random noise in the oscilloscope display, follow these steps: 1) Press the “ACQUIRE” button to display the acquire menu. 2) Press the “Acquisition” option button or turn the “Universal” knob to select “Average”. 3) Press the “Averages” option button to see the effects of varying the number of running averages on the waveform display. Averaging reduces random noise and makes it easier to see the details of a signal.
3. 4. 5. 6. Press the “Sync” option button and select “Line Num” and turn the universal knob to set a specific line number. Press the “Standard” option button and select “NTSC”. Turn the “Time/Div” knob to see a complete video line across the screen. Turn the “Volts/Div” knob to ensure that the entire video signal is visible on the screen.
D A B C Sin θ=A/B or C/D where θ=phase shift (in degrees) between the two signals from the formula above, you could get: θ=±arcsine (A/B) or ±arcsine (C/D) If the main axis of the ellipse is at II and IV quadrant, θ must be in the range of (0-π/2) or (3π/2-2π). If the main axis is at I and III quadrant, θ must be in the range of (π/2-π) or (π-3π/2).
6. 7. 8. Press the “Operation” option button and select “－”. Press the “CH1－CH2” option button to display a new waveform that is the difference between the displayed waveforms. You can adjust the vertical scale and position of the Math waveform. To do so, follow these steps: a. Remove the channel 1 and channel 2 waveforms from the display. b. Turn the CH 1 and CH 2 VOLTS/DIV and VERTICAL POSITION knobs to adjust the vertical scale and position. NOTE. First be sure to compensate both probes.
Chapter 5 Message Prompts and Troubleshooting Message Prompts • • • • • • • • • • • • • Trig level at limit! : Prompts you that the trigger Level is at a limit when you turn the Trig level knob. Horizon position at limit! : Prompts you that the horizontal position is at a limit when you turn the horizontal position knob. Volts/Div at limit! : Prompts you that the vertical voltage has already reached the Min 2mV/div or the Max 5V/div.
• • • Ready Data Success! : Read setup data or waveform data from the internal memory of the oscilloscope or USB flash was successful. USB Flash Drive isn’t connected! : When the “Save To” option is set to “File” or the “Print Key” option is set to “Save Picture” in “Save/Recall” menu , press the “Save” option button or the “Time/div” knob before inserting the USB Flash Drive to the USB Host port or this will appear on the screen.
5. 6. 7. “edge” trigger mode. The video signal should use the “Video” Trigger mode. The signal would display steadily only when using matching trigger mode. 3. Attempt to change the “coupling” into “HF Reject” or “LF Reject” display, so that the High/low frequency noise will be filtered. When pressing “RUN/STOP” button, nothing displays. Check whether or not the trigger mode on the trigger interface is in “normal” or “single”, and then check the trigger level to see if it is over the waveform range.
Chapter 6 Specifications • • All specifications apply to measurements with a 10X probe. To verify that the oscilloscope meets specifications, the oscilloscope must first meet the following conditions: o The oscilloscope must have been operating continuously for thirty minutes within the specified operating temperature. o You must perform the Do Self Cal operation, accessible through the Utility menu, if the operating temperature changes by more than 5° C.
factors 2552/2553 Vertical System Vertical Sensitivity Channel voltage offset range Vertical Resolution Channels Analog Bandwidth (3dB) Single-shot Bandwidth 2556/2557 2558/2559 2 mV/div – 10 V/div (1-2-5 order) 2 mV–100 mV: ±800 mV 102 mV – 5 V: ±40 V 8 bit 2 (2552) 4 (2553) 70 MHz 2 (2554) 4 (2555) 100 MHz 2 (2556) 4 (2557) 200 MHz 2 (2558) 4 (2559) 300 MHz 70 MHz 100 MHz 200 MHz 300 MHz Lower frequency limit (AC 3dB) DC Gain Accuracy DC Measurement Accuracy: All Gain settings ≤100mV/div DC Mea
Ch to Ch Skew (both channels in same V/div setting) Math operation FFT Bandwidth Limited <2ns (Equivalent to 2 minor divisions in smallest t/div) +, -, *, /, FFT <1ns Window mode: Hanning, Hamming, Blackman, Rectangular Sampling points: 1024 20 MHz ± 40% (Note: BW limited below 20 MHz when using probe in x1) Common Specifications (all models) Horizontal System Real Time *2 GSa/s (half-channel interleaved) Sampling 1 GSa/s (per channel) *On 4-Ch models, Ch1 and Ch2 are interleaved, and Ch3 and Ch4 Rate H
details on the number of data points that can be saved to a CSV file can be found in the storage chapter of this manual. The number of data points that can be captured via USB device interface using the EasyScope software is specified in the EasyScope manual.
Slope Trigger Alternate Trigger (>, <, =) Positive slope, (>, <, =) Negative slope Time: 20 ns - 10 s CH1 trigger type: Edge, Pulse, Video, Slope CH2 trigger type: Edge, Pulse, Video, Slope CH3 trigger type: Edge, Pulse, Video, Slope CH4 trigger type: Edge, Pulse, Video, Slope Display System Display Mode Color TFT 7.0 in(177.
Hardware Frequency Counter Reading resolution 6 digits Accuracy ± 0.01% Range DC Couple, 10 Hz to Max. BW Signal Types Satisfying all trigger signals (except pulse width trigger and video trigger) Environmental Temperature Cooling Humidity Elevation Operating: 50° F to 104 °F (10 °C to +40 °C) Not operating: -4 °F to 140 °F (-20 °C to +60 °C) Internal cooling fan Operating: 85% RH, 104 °F (40 °C), 24 hours Not operating: 85% RH, 149 °F (65 °C), 24 hours Operating: 9,842.
Mechanical Dimensions (WxDxH) Weight Interface USB LAN 14.1 x 6.14 x 4.65 inches (358 x 156 x 118 mm) 4CH models: Approx. 9.9 lbs (4.5 kg) 2CH models: Approx. 9.5lbs (4.3 kg) Front and rear panel USB host port forflash drives USB device port: for PC communication supports SCPI for remote control Specifications are subject to change without notice. To ensure the most current version of this manual, please download the current version here: http://www.bkprecision.
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. Low Voltage Directive - EN61010-1: 2001 Safety requirements for electrical equipment for measurement, control, and laboratory use. The oscilloscope meets the following: - - - EMC Directive Installation Categories II (Supply Connector) and I (Measuring Terminals).
Appendix A Default Setup Menu or system Options, knobs or buttons Default setup CH1,CH2 Coupling DC BW Limit Off Volts/div Coarse Probe 1X Invert Off Filter Off Volts/div 1.00V Operation + SourceA CH1 SourceB CH1 Invert Off MATH FFT operation: HORIZONTAL CURSOR Source Window FFT Zoom Scale Display CH1 Hanning 1X dBVrms Split Window Main Position 0.00 μs Time/div 500 μs Window Zone 50.0 μs Trigger knob level Type Off Source CH1 Horizontal (voltage) +/- 3.
MEASURE ACQUIRE DISPLAY Source CH1 Type average three mode options Sampling Averages Sampling mode 16 Real Time Type Vectors Persist off Gird SAVE/RECALL REF UTILITY TRIGGER (edge) Intensity 60% Brightness 40% Format YT Menu Display infinite Type Setups Save To Device Setup No.
TRIGGER (pulse) TRIGGER (Video) TRIGGER (Slope) TRIGGER (Alternate) LEVEL 0.00V Type pulse Source CH1 When = Set Pulse Width 1.00ms Mode Auto Coupling DC Type Video Source CH1 Polarity Normal Sync All Lines Standard NTSC Mode Auto Type Slope Source CH1 Time 1.
Appendix B Index S/div, 47 Sampling, 71 Save Picture, 104 Screen Test, 114 Self Calibration, 113 Self Test, 114 SET TO 50%, 22 Sinx/x, 71 Slope Trigger, 59 Storage, 94 Sync, 56 System Status, 111 Time Domain Aliasing, 74 Track Mode, 84 Trigger, 49 Trigger status, 13 Universal Knob, 27 Updating, 117 Utility, 107 Video Trigger, 55 Vmax, 90 Vmin, 90 Volts/Div, 33 Vpp, 90 Waveform Recorder, 122 Window, 39 Window Zone, 48 X-Y Format, 80 - Width, 92 + Width, 91 Alternative Trigger, 62 Auto set, 25 Blackman, 42 C
Appendix C Disabling Auto Function The 2550 series has the ability to disable the Auto button that would automatically setup the scope to display a signal, circumventing the need to know how to set up scope parameters. This feature could be used by educators as a teaching tool for basic oscilloscope operation. To receive information on how to disable this Auto button function, please contact B&K Precision at http://www.bkprecision.com/contact_us .
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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