BK Precision 2190D User Manual
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BK Precision 2190D User Manual

100 mhz digital storage oscilloscope
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Model: 2190D
100 MHz Digital Storage
Oscilloscope
USER MANUAL

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Summary of Contents for BK Precision 2190D

  • Page 1 Model: 2190D 100 MHz Digital Storage Oscilloscope USER MANUAL...

  • Page 2: Safety Summary

    Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this instrument. Before applying power to this instrument:  Read and understand the safety and operational information in this manual.
  • Page 3 battery. Category II (CAT II): Measurement instruments whose measurement inputs are meant to be connected to the mains supply at a standard wall outlet or similar sources. Example measurement environments are portable tools and household appliances. Category III (CAT III): Measurement instruments whose measurement inputs are meant to be connected to the mains installation of a building.
  • Page 4 To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety ground. This instrument is grounded through the ground conductor of the supplied, three-conductor line power cable. The power cable must be plugged into an approved three- conductor electrical outlet.
  • Page 5 The instrument is designed to be used in office-type indoor environments. Do not operate the instrument  In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-divided particulates.  In relative humidity conditions outside the instrument's specifications.
  • Page 6 Notify B&K Precision of the nature of any contamination of the instrument. Clean the instrument only as instructed Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants, solvents, acids/bases, or other such chemicals. Clean the instrument only with a clean dry lint-free cloth or as instructed in this manual.
  • Page 7 for both voltages. Do not attempt any service or adjustment unless another person capable of rendering first aid and resuscitation is present. Do not insert any object into an instrument's ventilation openings or other openings. Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit exists.
  • Page 8 For continued safe use of the instrument  Do not place heavy objects on the instrument.  Do not obstruct cooling air flow to the instrument.  Do not place a hot soldering iron on the instrument.  Do not pull the instrument with the power cord, connected probe, or connected test lead.

  • Page 9: Compliance Statements

    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...

  • Page 10: Ce Declaration Of Conformity

    CE Declaration of Conformity This instrument meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive with the following standards. Low Voltage Directive EN61010-1: 2001 EN61010-031: 2002+A1: 2008 EMC Directive EN 61326-1:2006 EN 61000-3-2: 2006+A2: 2009 EN 61000-3-3: 2008...

  • Page 11: Safety Symbols

    Safety Symbols Refer to the user manual for warning information to avoid hazard or personal injury and prevent damage to instrument. Electric Shock hazard Alternating current (AC) Chassis (earth ground) symbol. Ground terminal On (Power). This is the In position of the power switch when instrument is ON.

  • Page 12: Table Of Contents

    Table of Contents Safety Summary ..................i Compliance Statements ................ viii Safety Symbols ..................x General Information .................1 Product Overview ................. 1 Package Contents ................. 1 Front Panel ................... 2 Front Panel Description ................ 2 Back Panel ..................3 Back Panel Description ................. 4 Display Information ..............
  • Page 13 Default Setup ................19 Universal Knob................20 Vertical System ................21 Using Vertical Position Knob and Volts/div Knob ....... 21 Channel Function Menu ............. 22 Setting up Channels ................25 Math Functions ................31 FFT Spectrum Analyzer ............... 32 Using REF ..................39 3.10 Horizontal System...............
  • Page 14 Pass/Fail .................... 112 Waveform Record ................117 Recorder (Scan Mode Only) ............. 121 Help Menu ..................124 Application Examples ..............125 Taking Simple Measurements ..........125 Taking Cursor Measurements........... 126 Capturing a Single-Shot Signal ..........128 Analyzing Signal Details ............129 Triggering on a Video Signal .............

  • Page 15: General Information

    1 General Information 1.1 Product Overview The B&K Precision 2190D digital storage oscilloscope (DSO) is a portable benchtop instrument used for making measurements of signals and waveforms. The oscilloscope’s bandwidth is capable of capturing up to 100 MHz signals with a real time sampling rate of up to 1 GSa/s. With up to 40k points of deep memory, it allows for capturing more details of a signal for analysis and displayed on the large color LCD display.

  • Page 16: Front Panel

     2 x 1:1/10:1 Passive Oscilloscope Probes Verify that all items above are included in the shipping container. If anything is missing, please contact B&K Precision. 1.3 Front Panel It is important for you to familiarize yourself with the DSO’s front panel before operating the instrument.

  • Page 17: Back Panel

    Probe Compensator (1 kHz and Ground) Horizontal Controls (Time Base) Trigger Controls Auto Function Button Menu and Measurement Buttons Universal Knob Vertical Controls 1.4 Back Panel The following images show back and side panel connection locations. Figure 1.2 – Back Panel...

  • Page 18: Back Panel Description

    Back Panel Description Security Lock Receptacle Pass/Fail Output RS-232 Connector Rear USB (Type B) Device Connector Power Input Connector AC Power Switch 1.5 Display Information Figure 1.3 – Display Screen...

  • Page 19: User Interface Description

    User Interface Description Trigger Level Display Marker Vertical Display Markers (Ground Reference) Channel Source, Coupling Type, Volts/Division, BW Limit Indicator Timebase Setting Horizontal Trigger Position Display Frequency Counter Trigger Source, Type, and Level Indicator Rear USB Indicator Print Key Save Function Indicator Waveform Display Preview Horizontal Trigger Position Marker USB Flash Drive Indicator...

  • Page 20: Getting Started

    2 Getting Started Before connecting and powering up the instrument, please review and go through the instructions in this chapter. 2.1 Input Power Requirements Input Power The supply has a universal AC input that accepts line voltage and frequency input within: 100 –...

  • Page 21: Verify Ac Input Voltage

    Verify AC Input Voltage Verify and check to make sure proper AC voltages are available to power the instrument. The AC voltage range must meet the acceptable specification as explained in section 2.1. Connect Power Connect AC power cord to the AC receptacle in the rear panel and press the power switch to the ON position to turn ON the instrument.

  • Page 22: Check Model And Firmware Version

    Check Model and Firmware Version The model and firmware version can be verified from within the menu system. Press Utility and select System Status option. The software/firmware version, hardware version, model, and serial number will be displayed. Press the Single key to exit. Function Check Follow the steps below to do a quick check of the oscilloscope’s functionality.
  • Page 23 PROBE COMP Figure 2.3 – Probe Compensation 3. Press “AUTO” to show the 1 kHz frequency and about 3V peak- peak square wave in couple seconds. Figure 2.4 – 3 Vpp Square Wave 4. Press “CH1” two times to turn off channel 1, Press“CH2” to change screen into channel 2, reset the channel 2 as step 2 and step 3.

  • Page 24: Probe Safety

    Probe Safety A guard around the probe body provides a finger barrier for protection from electric shock. Figure 2.5 – Oscilloscope Probe Connect the probe to the oscilloscope and connect the ground terminal to ground before you take any measurements. SHOCK HAZARD To avoid electric shock when using the probe, keep fingers behind the guard on the probe body.

  • Page 25: Probe Attenuation

    Probe Attenuation Probes are available with various attenuation factors which affect the vertical scale of the signal. The Probe Check function verifies that the Probe attenuation option matches the attenuation of the probe. You can push a vertical menu button (such as the CH 1 MENU button), and select the Probe option that matches the attenuation factor of your probe.
  • Page 26 AUTO BUTTO PROBE COMP Figure 2.6 – Probe Compensation Setup 1. Set the Probe option attenuation in the channel menu to 10X. Do so by pressing CH1 button and selecting “Probe” from menu. Select 10X. Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope.

  • Page 27: Functions And Operating Descriptions

    3 Functions and Operating Descriptions To use your oscilloscope effectively, you need to learn about the following oscilloscope functions: • Menu and control button • Connector • Auto Setup • Default Setup • Universal knob • Vertical System • Channel Function Menu •...

  • Page 28: Menu And Control Button

    3.1 Menu and Control Button Figure 3.1 – Control Buttons  Channel buttons (CH1, CH2): Press a channel button 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.
  • Page 29  HORI MENU: Press to display the Horizontal menu. You can use the Horizontal menu to display the waveform and zoom in 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, Alternative) and trigger settings.

  • Page 30: Connectors

    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.

  • Page 31: Auto Setup

    3.3 Auto Setup The 2190D Digital Storage Oscilloscope has an Auto Setup function that identifies the waveform types and automatically adjusts controls to produce a usable display of the input signal. Press the AUTO front panel button, and then press the menu option button adjacent to the desired waveform as follows: Figure 3.3 –...
  • Page 32 Auto set and show the falling time. (Falling edge) Causes the oscilloscope to recall the previous setup. (Undo Setup) Auto Set determines the trigger source based on the following conditions: • If multiple channels have signals, channel with the lowest frequency signal.

  • Page 33: Default Setup

    Signal inverted 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 Trigger holdoff Minimum Trigger level Set to 50% NOTE: The AUTO button can be disabled. Please see “Appendix C Disabling Auto Function”...

  • Page 34: Universal Knob

    • Calibration data 3.5 Universal Knob Figure 3.4 – 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, adjusting the X and Y masks when using the pass/fail function, etc.

  • Page 35: Vertical System

    3.6 Vertical System The vertical control could be used for displaying waveform, rectify scale and position. Figure 3.5 – Vertical System Controls Using Vertical Position Knob and Volts/div Knob • Vertical “POSITION” Knob Use the Vertical “POSITION” knobs to move the channel waveforms up or down on the screen.

  • Page 36: Channel Function Menu

    channel waveforms. When you turn the “volts/div” knob, the oscilloscope increases or decreases the vertical size of the waveform on the screen with respect to the ground level. When you press the “Volt/div” knob, you can switch “Volts/div” option between “Coarse” and “Fine”. The vertical scale is set by a 1-2-5 step sequence in Coarse mode.
  • Page 37 Fine changes the resolution to small steps between the coarse settings. Set to match the type of probe you 1X, 5X are using to ensure correct vertical 10X, 50X Probe 100X, 500X, readouts. 1000X Press this button to enter the second Next Page Page 1/3 page menu...
  • Page 38 Table 3.6 – Digital Filter Menu Option Setting Introduction Turn on the digital filter. Digital Filter Turn off the digital filter. Setup as LPF (Low Pass Filter). Setup as HPF (High Pass Filter). Type Setup as BPF (Band Pass Filter). Setup as BRF (Band Reject Filter).

  • Page 39: Setting Up Channels

    bandwidth will not be accurate. If the channel is set to DC coupling, you can quickly measure the DC component of the signal by simply noting its distance from the ground symbol. 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 40: Bandwidth Limiting

    • Press “CH1”→“Coupling”→“DC”, Set to DC couple mode. Both DC and AC components of the input signal will be captured. Figure 3.7 – DC Coupling • Press “CH1”→“Coupling”→“GND”, Set to GROUND mode. This disconnects the input signal. Figure 3.8 – Ground Coupling 2.
  • Page 41 • Press “CH1”→“BW Limit”→ “On”, and bandwidth will be limited to 20 MHz. • Press “CH1”→“BW Limit”→ “Off”, and bandwidth limit will be disabled. Figure 3.9 – Bandwidth Limit 3. Volts/Div Settings Vertical scale adjust have Coarse and Fine modes, Vertical sensitivity range of 2 mV/div –...
  • Page 42 Figure 3.10 – Coarse/Fine Control 4. Setting Probe Attenuation In order to set the attenuation coefficient, you need to specify it in the channel operation Menu. If the attenuation coefficient is 10:1, the input coefficient should be set to 10X, so that the Volts/div information and measurement testing is correct.

  • Page 43: Inverting Waveforms

    5. Inverting Waveforms Take CH1 for example: • Press “CH1”→ Next Page “Page 1/3” →“Invert”→“On”: Figure 3.12 – Invert Waveform Screen 6. Using the Digital Filter • Press “CH1”→ Next Page “Page 1/3”→ “Filter”, display the digital filter menu. Select “Filter Type”, then select “Upper Limit”...
  • Page 44 Figure 3.13 – Digital Filter Menu • Press “CH1”→ “Next Page “Page 1/3”→ “Filter” → “On”. Turn on the Digital Filter function. Figure 3.14 – Digital Filter Adjustment Screen...

  • Page 45: Math Functions

    3.8 Math Functions Math shows the results after +,-,*, / and FFT operations of the CH1 and CH2. Press the MATH button to display the waveform math operations. Press the MATH button again to remove the math waveform display. Table 3.7 – Math Function Menu Function Setting Description...

  • Page 46: Fft Spectrum Analyzer

    Table 3.9 – Math Function Description Operation Setting Description Source A waveform adds Source B ＋ waveform. Source B waveform is subtracted － from Source A waveform. Source A multiplied by Source B Source A divided by Source B Fast Fourier Transform. Figure 3.15 –...
  • Page 47 • Test the harmonic content and distortion in the system • Show the Noise in the DC Power supply • Test the filter and pulse response in the system • Analyze vibration Table 3.10 – FFT Function Menu 1 FFT Option Setting Description Select this channel as the FFT...
  • Page 48 Scale unit. Display FFT waveform on half Split screen. Display Full screen Display FFT waveform on full screen. Return to the first page of FFT Next Page Page 2/2 menu. To use the Math FFT mode, you need to perform the following steps: 1.

  • Page 49: Displaying The Fft Spectrum

    Displaying the FFT Spectrum Press the MATH button to display the Math Menu. Use the options to select the Source channel, Window algorithm, and FFT Zoom factor. You can display only one FFT spectrum at a time. You can select “Full screen” or “Split”...
  • Page 50 same as no window. Broadband random noise with a relatively slowly varying spectrum. Better frequency, poorer magnitude Sine, periodic, and accuracy than Hanning narrow-band random Rectangular. Hamming Hamming noise. Asymmetric has slightly better transients or bursts. frequency resolution than Hanning. Single frequency Best magnitude, worst waveforms, to find...
  • Page 51 2. Press the “MATH” button to enter the “MATH” menu. 3. Press the “Operation” option button to select “FFT”. 4. Press the “Source” option button to select “CH1”. 5. Press CH1 button to display CH1 menu. 6. Turn the “Time/div” knob to adjust the sampling rate (at least double the frequency of input signal).
  • Page 52 2. Press the “Cursor Mode” button to select “Manual”. 3. Press the “Type” option button to select “Time”. 4. Press the “Source” option button to select “MATH”. 5. Press the “CurA” option button, turn the “Universal” button to move Cursor A to the highest position of the FFT waveform.

  • Page 53: Using Ref

    3.9 Using REF The reference control saves waveforms to a nonvolatile waveform memory. The reference function becomes available after a waveform has been saved. Table 3.13 – REF Function Menu Option Setting Description CH1,CH2, Choose the waveform display to store. Source CH1 off CH2 off...

  • Page 54: Horizontal System

    Figure 3.18 – 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.

  • Page 55: Horizontal Control Knob

    Figure 3.19 – Horizontal Controls Table 3.14 – Horizontal System Function Menu Option Setting Description Delayed 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.

  • Page 56: Window Zone

    to the center of the screen). The resolution of this control varies with the time base setting. 2. When you press the horizontal “POSITION” Knob, you can set the horizontal position to zero. • “Time/div” knob 1. Used to change the horizontal time scale to magnify or compress the waveform.

  • Page 57: Trigger System

    Figure 3.20 – Horizontal Delay Menu 4. Turn the “Horizontal Position” knob (adjust window’s position) to select the window that your need and expanded window waveform display on the below half screen at the same time. 3.11 Trigger System The trigger determines when the oscilloscope starts to acquire data and display a waveform.

  • Page 58: Signal Source

    Figure 3.21 – Trigger Controls • “TRIG MENU” Button: Press the “TRIG MENU” Button to display the “Trigger Menu”. • “LEVEL” Knob: The LEVEL knob is to set the corresponding signal voltage of trigger point in order to sample. Press the “LEVEL” knob to set trigger level to zero.

  • Page 59: Trigger Type

    Trigger Type The scopes have five trigger types: Edge, Video, Pulse, Slope, and Alternate. Edge Trigger Use Edge triggering to trigger on the edge of the oscilloscope input signal at the trigger threshold. Table 3.15 – Edge Trigger Function Menu Option Setting Description...
  • Page 60 Use this mode to let the acquisition free-run in the absence of a valid trigger; This mode allows Auto an untriggered, scanning waveform at 100 ms/div or slower time base settings. Use this mode when you want to see only valid Mode triggered waveforms;...
  • Page 61 Return Return to the first page of “Trigger main menu”. Figure 3.22 – Trigger Menu Screen Operating Instructions: 1. Setup Type  Press the “TRIG MENU” button to display “Trigger” menu.  Press the “Type” option button to select “Edge”. 2.

  • Page 62: Pulse Trigger

    Normal: The waveform refreshes when the trigger condition is satisfied and waits for next trigger event occurring when the trigger condition is not satisfied. Single: The oscilloscope acquires a waveform when the trigger condition is satisfied and then stops 5. Set up Trigger coupling ...
  • Page 63 (Positive pulse width less Select how to compare than pulse width setting) the trigger pulse (Positive pulse width larger relative to the value than pulse width setting) selected in the Set (Positive pulse width equal Pulse Width option. to pulse width setting) When (Negative pulse width less than pulse width setting)
  • Page 64 Table 3.18 – Pulse Trigger Function Menu 2 Option Setting Description Select the pulse to trigger the pulse Type Pulse match the trigger condition. Select the type of triggering; Normal Auto mode is best for most Pulse Width Mode Normal trigger applications.

  • Page 65: Video Trigger

    3. Set up pulse width  Turn the “Universal” knob to set up width. Video Trigger Trigger on fields or lines of standard video signals. Table 3.19 – Video Trigger Function Menu 1 Option Setting Description When you select the video type, put the couple set to the AC, then Type Video...
  • Page 66 AC, then you could trigger the NTSC, PAL and SECAM video signal. NTSC Select the video standard for Standard Pal/Secam sync and line number count. Use this mode to let the acquisition free-run in the absence of a valid trigger; This Auto mode allows an untriggered, scanning waveform at 100...
  • Page 67 Figure 3.25 – Video Trigger Menu Operating Instructions: 1. Set up Type  Press the “TRIG MENU” button to display “Trigger” menu.  Press the “Type” option button to select “Video”. 2. Set up Polarity  Press the “Polarity” option button to select “ ”...

  • Page 68: Slope Trigger

    Slope Trigger Trigger on positive slope or negative slope of waveform, according to setup time of the oscilloscope. Table 3.21 – Slope Trigger Function Menu 1 Option Setting Instruction Trigger on positive slope of Type Slope negative slope according to setup time of the oscilloscope.
  • Page 69 Figure 3.26 – Slope Trigger Menu 1 Table 3.22 – Slope Trigger Function Menu 2 Option Setting Instruction Trigger on positive slope or negative Type Slope slope according to setup time of the oscilloscope. Vertical Select the trigger level that can be adjusted by “LEVEL”...
  • Page 70 Use this mode when you want to see only valid triggered waveforms; when Normal you use this mode, the oscilloscope does not display a waveform until after the first trigger. When you want the oscilloscope to Single acquire a single waveform, press the “SINGLE”...

  • Page 71: Alternate Trigger

    6. Press the “When” option button to select “ ”, “ ”, “ ”, “ ”, “ ” and “ ”. 7. Press the “Time” button, 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”.
  • Page 72 When using alternate trigger, the triggered signal comes from two vertical channels. In Type Alternate this mode, you can observe two irrelative signals at a time. Channels CH1-CH2 Set the trigger channels Set trigger type information for CH1 signal Source Set trigger type information for CH2 signal Set trigger type of vertical channel signal to Mode...
  • Page 73 Channels CH1-CH2 Set the trigger channels Set trigger type information for CH1 signal Source Set trigger type information for CH2 signal Set trigger type of the vertical channel Mode Pulse signal to Pulse trigger. Enter the second page of Alternative Next Page Page 1/2 trigger menu.
  • Page 74 Type Alternative 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. Channels CH1-CH2 Set the trigger channels Set trigger type information for CH1 signal Source Set trigger type information for CH2...
  • Page 75 Table 3.29 – Alternate Trigger Slope Mode Function Menu 1 Option Setting Description Type Alternative 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. Channels CH1-CH2 Set the trigger channels...
  • Page 76 them at the same time. Set up Enter “Trigger setup menu” (See Table 3.16). Next Page Page 2/2 Return to the first page of “Alternative trigger menu”. Operating Instructions: To use alternate triggering, follow these steps: Input two irrelative signals to channel 1 and channel 2. Press the AUTO button.

  • Page 77: Coupling

    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 “TRIG MENU” button and then select “Edge”, “Pulse”, “Video”, or “Slope” trigger. Then select the “Coupling”...

  • Page 78: Trigger Holdoff

    Rising edge Falling edge Figure 3.29 – Rising and Falling Edge Illustration 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 79: Signal Acquisition System

    Trigger position Trigger level Holdoff time Figure 3.30 – Trigger Holdoff Illustration If you want to change holdoff time, please follow the steps below: Press the “TRIG MENU” button to show the “TRIG Menu”. Press the “Type” option button to select trigger type. Press the “Set Up”...
  • Page 80 Detect the noise and decrease the Peak Detect possibility of aliasing. Use to reduce random or Average uncorrelated noise in the signal display. Averages (4, 16, 32, 64, Select number of averages. 128, 256) Use sin interpolation Sinx Sinx/x Use linear interpolation Set the Sampling mode to Equivalent Equ time Real Mode...
  • Page 81 Figure 3.31 – Acquire Menu  Peak Detect: Peak Detect mode capture the maximum and minimum values of a signal Finds highest and lowest record points over many acquisitions. Advantage: In this way, the oscilloscope can acquire and display narrow pulses, which may have otherwise been missed in Sample mode.
  • Page 82  Average: The oscilloscope acquires several waveforms, averages them, and displays the resulting waveform. Advantage: You can use this mode to reduce random noise. Figure 3.33 – Average Acquisition  Equivalent Time Sampling: The equivalent time sampling mode can achieve up to 20 ps of horizontal resolution (equivalent to 50GSa/s).
  • Page 83 Acquire enough data to fill the portion of the waveform record to the left of the trigger point. This is also called the pre-trigger. Continue to acquire data while waiting for the trigger condition to occur. Detect the trigger condition. Continue to acquire data until the waveform record is full.

  • Page 84: Display System

    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 The sampling rate is based on the time division scaling on the screen.
  • Page 85 page. Figure 3.35 – Display Menu 1 Table 3.33 – Display System Menu 2 Option Setting Description YT format displays the vertical voltage in relation to time Format (horizontal scale). XY format displays a dot each time a sample is acquired on channel 1 and channel 2 Normal Set to normal mode.
  • Page 86 20sec Infinite Press this button to enter the Next Page Page 2/3 second page of “Display menu”. Figure 3.36 – Display Menu 2 Table 3.34 – Display System Menu 3 Option Setting Description Skin Classical Set up screen style. Modern Tradition Succinct Next Page...
  • Page 87 Set up Persist Press “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 3.37 – Persist Screen Set up Intensity Press the “Intensity” option button and turn the “Universal” knob to adjust waveforms’...

  • Page 88: X-Y Format

    Press the “Menu Display” option button to select “2 sec”, “5sec”, “10sec”, “20sec” 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.

  • Page 89: Measure System

    3.14 Measure System The oscilloscope displays the voltage in relation to time and tests the waveform displayed. Different measurement techniques such as scale, Cursor and auto measure modes are used. Scale Measurement This method allows you to make a quick, visual estimate. For example, you might look at waveform amplitude and determine that it is a little more than 100 mV.
  • Page 90 parameters. Source MATH Select input signal channel. REFA REFB Cur A Select this option, use “Universal” knob to adjust cursor A. Cur B Select this option, use “Universal” knob to adjust cursor B. In this mode, the screen displays two horizontal parallel cursors or vertical parallel cursors to measure voltage or time.

  • Page 91: Track Mode

    If the measurement type is set to “Voltage”, the values are as followed:  The voltage increment between Cursor A and Cursor B: ΔV  The value of Cur A: CurA  The value of Cur B: Cur B If the measurement type is set to “Time”, the values are as followed: ...
  • Page 92 Set the input signal channel that Cursor A the Cursor A will measure. NONE Set the input signal channel that Cursor B the Cursor B will measure. NONE Select this option, turn the Cur A “Universal” knob to adjust horizontal coordinate of Cursor A. Select this option, turn the Cur B “Universal”...

  • Page 93: Auto Mode

    A→V: The Vertical position of Cursor A (Voltage cursor centered around channel ground level). B→T: The horizontal position of Cursor B (Time cursor centered around the midpoint of screen). B→V: The Vertical position of Cursor B (Voltage cursor centered around channel ground level). ΔT: Horizontal space between Cursor A and Cursor B (Time value between two cursors).

  • Page 94: Auto Measurement

    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”. 3. Press the “MEASURE” button to enter “Auto cursor measure mode menu” to select the parameter that you want to measure.
  • Page 95 Table 3.37 – Auto Measurement Menu Option Description Voltage Press this button to enter the Voltage measure menu. Time Press this button to enter the Time measure menu. Delay Press this button to enter the Delay measure menu. All Mea Press this button to enter the All Measurement menu.
  • Page 96 Display the corresponding icon and measure value of your selected Voltage measure parameter. Return to the first Return page of auto measurement menu. Table 3.39 – Auto Time Measurement Menu Option Setting Description Select input signal Source CH1, CH2 source for Time measure.
  • Page 97 Table 3.40 – Auto Delay Measurement Menu Option Setting Description Source CH1, CH2 Select any two input signal source for Delay measure. Type Phase, FRR, FRF, FFR, FFF, LRR, Press the “Type” button or LRF, LFR, LFF turn the “Universal” knob to select Delay measure parameter.
  • Page 98 menu”. Table 3.42 – Types of Measurements Measure Type Description The most positive peak voltage measured over the entire waveform. Vmax The most negative peak voltage measured over the entire waveform. Vmin Measures the absolute difference between the maximum and minimum peaks of the entire waveform.
  • Page 99 Defined as (Vmax-Vhig)/Vamp before the waveform falling. FPREshoot Measures the time between 10% and 90% of the first rising edge of the waveform. Rise Time Measures the time between 90% and 10% of the first falling edge of the waveform. Fall Time The duration of a burst.
  • Page 100 The time between the first rising edge of source 1 and the last rising edge of source 2. The time between the first rising edge of source X and the last falling edge of source Y. The time between the first falling edge of source X and the last rising edge of source Y.
  • Page 101 Figure 3.42 – Measuring Vpp Parameters 6. Press the “Return” option button to return to the home page of “Auto Measurement” menu. The selected parameter and the corresponding value will display on the top position of the home page. You can display the other parameters and their value on the corresponding position in the same way.

  • Page 102: Storage System

    Figure 3.43 – Measuring All Time Parameters 3.15 Storage System As shown below, the “SAVE/RECALL” button enters the “Storage System Function Menu”. The oscilloscope can save and recall up to 20 instrument settings and 10 waveforms in internal memory. There is a USB Host interface on the front panel of the oscilloscope where you can save setup data, waveform data, waveform display image, and CSV file to a USB flash drive.
  • Page 103 Figure 3.44 – Save All Menu (Directory) While file shows option buttons for New File, Delete File, and Load. Figure 3.45 – Save All Menu (Files)

  • Page 104: Recalling Files

    Recalling Files The Load button is used to recall your setup files. Once you’ve navigated to the desired file and it’s 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.

  • Page 105: Save/Recall Setup

     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.  Additional selections for BackSpace, DeleteCharacter, and CleanName are available for convenience and are also accessed using the “Universal”...
  • Page 106 Press the “Setup” option button or Setup No.1 to No.20 turn the “universal” knob to select storage position. Save to the selected storage Save location. Recall from the storage location Recall indicated by “Setup”. Figure 3.47 – 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”...
  • Page 107 Press the “Save” option button. To Recall setup, follow steps below: Press the “SAVE/RECALL” button to enter the “SAVE/RECALL” display menu. Press the “Type” option button to select “Setups”. Press the “Save to” option button to select “Device”. Press the “Setup” option button or turn the “Universal” knob to select “No.1”.
  • Page 108 Save Setup to USB Flash drive: For example: Save setup that set waveform display type to “Dots” to USB flash drive. Press the “SAVE/RECALL” button to select “Setups”. Insert USB flash drive to USB host port of the oscilloscope and wait that the oscilloscope has initialized USB flash drive (about five seconds).

  • Page 109: Save/Recall Waveform

    Recall Factory You can use this option to recall the factory settings Table 3.45 – Factory Function Menu Description Option Setting To view the Factory setup. Type Factory Clears all memory, including Depth Recover setups, waveforms and masks. Update the config file Update cfg Recall the Factory setup.
  • Page 110 Save waveforms to the Save to Device oscilloscope’s internal memory. Press the “waveform” option Waveform No.1 to No.20 button or turn the “Universal” knob to select storage location. Save waveform to the selected Save storage location. Recall the “Waveform” from Recall the selected storage location in “Waveform”...
  • Page 111 Press the “Save” option button. To recall waveforms, follow the steps below: Press the “SAVE/RECALL” button to enter “SAVE/RECALL” display menu. Press the “Type” option button to select “Waveforms”. Press the “Save to” option button to select “Device”. Press the “Waveform” option button or turn the “Universal”...
  • Page 112 To save waveforms to a USB flash drive, follow the steps below: Input a sine signal to channel 1, press the “AUTO” button. Press the “SAVE/RECALL” button to enter the “SAVE/RECALL” display menu. Press the “Type” option button to select “Waveforms”. Insert a USB flash drive to the front or rear USB host port of the oscilloscope and wait until the oscilloscope has initialized USB flash drive (about five seconds).
  • Page 113 Table 3.48 – Picture Storage Menu Description Option Setting Select save screenshot. Type Pictures Saves screenshot to USB flash drive. Save Figure 3.52 – Save Picture Screen To save waveform images to USB flash drive, follow the steps below: Select the screen image that you want. Press the “SAVE/RECALL”...
  • Page 114 Press the “Confirm” button (within five seconds, there will be a message “Save data success” displayed on the screen). Now the screenshot image has been saved to the USB flash drive. Save/Recall CSV Table 3.49 – CSV Storage Menu Option Setting Description Type...
  • Page 115 Figure 3.53 – Save to CSV Screen To save CSV files to USB flash drive, follow the steps below: Press the “SAVE/RECALL” button to enter “SAVE/RECALL” menu. Press the “Type” option button to select “CSV”. Insert USB flash drive to USB host port of the oscilloscope and wait that the oscilloscope has initialized USB flash drive (about five seconds).

  • Page 116: Utility System

    NOTE: The maximum number of data points of a waveform that can be saved as a .CSV file into USB drive is ~40000 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”...
  • Page 117 日本語 Japanese 한국어 Korean Italian Italiana Press this button to enter second Next Page Page 1/4 page. Figure 3.54 – Utility Menu Screen 1 Table 3.51 – Utility System Menu 2 Option Setting Description Do Self Cal Auto self emendation. Run the screen test program Screen Test Run the keyboard test...
  • Page 118 Figure 3.55 – Utility Menu Screen 2 Table 3.52 – Utility System Menu 3 Option Setting Description Update Update the firmware of the firmware oscilloscope using a USB flash Drive. Press this button to enter the “Pass/Fail Pass/Fail menu”. Press this button to enter the Record waveform record menu.
  • Page 119 Figure 3.56 – Utility Menu Screen 3 Table 3.53 – Utility System Menu 4 Option Setting Description 1min, 2min, 5min, 10min Screen- 15min, 30min, 1hour, Set the time of Screen-saver saver 2hour, 5hour ,Off Enter recorder function Recorder (scan mode only) Press this button to enter Next Page first page.

  • Page 120: System Status

    Figure 3.57 – Utility Menu Screen 4 System Status Press the “System Status” option button of the Utility Menu to view the oscilloscope’s hardware and software configuration. Figure 3.58 – System Status Screen Table 3.54 – System Status Information Option Description...

  • Page 121: Language

    Startup Times List the number of startup times. Software version List the software version. Hardware Version List the hardware version. Product type List the product model. Serial No. List the product serial number. Language Menu items can be displayed in 12 different languages, selectable by the user.

  • Page 122: Self Test

    Menu, and execute self calibration program according to the prompt on the screen. Figure 3.60 – Self Calibration Screen Self Test Press “UTILITY” and select “Do Self Test” Table 3.55 – Self Test Menu 1 Option Description Screen Test Run Screen Test Program. Keyboard Test Run Keyboard Test Program.
  • Page 123 Figure 3.61 – 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.
  • Page 124 Figure 3.62 – 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’...

  • Page 125: Update Firmware

    Figure 3.63 – LED Test Screen 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.

  • Page 126: Pass/Fail

    calibration after the update. Go into the utility menu’s second page and select “Do Self Cal” to run self calibration. 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.
  • Page 127 Figure 3.64 – Pass/Fail Screen 1 Table 3.57 – Pass/Fail Menu 2 Option Setting Description Output signal when pass Pass condition is detected. Output Fail Output signal when fail condition is detected. When On, stops test when output occurs. Stop On Output When Off, continues test when output occurs.
  • Page 128 Figure 3.65 – Pass/Fail Screen 2 Table 3.58 – Mask Settings Menu 1 Option Setting Description X Mask Turn the “Universal” knob to set the range of horizontal clearance to the waveform. <0.04div-4.00div> xdiv Y Mask Turn the “Universal” knob to set the range of vertical clearance to the waveform.
  • Page 129 Figure 3.66 – Mask Menu Screen 1 Table 3.59 – Mask Settings Menu 2 Option Setting Description Save Store created mask setting. Load Recall stored mask setting. Return to the main menu of mask Return setting. Return to the first page of “Mask Last Page Page 2/2 Setting menu”.
  • Page 130 Figure 3.67 – Mask Menu Screen 2 RUN Pass/Fail test, please follow next page: Press UTILITY button to enter the “Utility menu”. Press the “Next Page – Page 1/4” option button. Press the “Next Page – Page 2/4” option button to enter the third page of “Utility menu”...

  • Page 131: Waveform Record

    13. Enter the first page of “Pass/Fail function menu”, press the “Operate” option button to select “ ”to run the pass/fail test. Waveform Record Record Press the Record option to record the input waveform from CH1 or CH2 with a maximum record length of 2500 frames. The time between frames is adjustable.
  • Page 132 Figure 3.68 – Record Menu Screen (Record Mode) To record waveforms, follow these steps: 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”.
  • Page 133 Mode Play Back Set the Play Back function menu. (Run) Press to start playback playing. Operate Press to stop playing. (Stop) Set circular play mode. Play Mode Set single time play mode. Interval Set time interval between frames. Enter the second page of Play Back Next Page Page 1/2 menu.
  • Page 134 Figure 3.70 – Playback Menu Screen 2 (Recode Mode) To play back current record waveforms, follow these steps: Press UTILITY button to enter “Utility menu”. Press the “Mode” option button to select “Play Back”. Press the “Play Mode” option button to select “ ”...

  • Page 135: Recorder (Scan Mode Only)

    Recorder (Scan Mode Only) 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 be played back on-screen and be retrieved from storage memory.
  • Page 136 Table 3.64 – Waveform Recorder (Record Mode) Menu Setting Option Description Start Start the recording Replay Replay the recorded waveform. When Store Mode is set to USB key, this will Copy show the filename Store Memory Stores recording to internal memory. Mode USB key Stores recording to external USB flash drive.
  • Page 137 Table 3.66 – Waveform Recorder Option Menu Option Setting Description Full Screen Waveform of Full screen recording and channel recalling Split Waveform of recording on split screen Viewer and channel recalling, CH1 is displayed in upper half-screen, CH2 is displayed in lower half-screen.

  • Page 138: Help Menu

    Recorder Operation step: Press the UTILITY button to enter “Utility” menu. Press the “Next Page” option button to enter the fourth page of “Utility” menu. Press the “Recorder” button to enter the Recorder menu. Press the “Option” button to set Recorder options. Press the “Record”...

  • Page 139: Application Examples

    4 Application Examples This section presents a series of application examples. These simple examples highlight the features of the oscilloscope and give ideas for using it to solve your own test problems. • Taking simple measurements • Taking cursor measurements •...

  • Page 140: Taking Cursor Measurements

     Taking Automatic Measurements The oscilloscope can take automatic measurements of most displayed signals. To measure signal frequency and peak-to-peak amplitude, follow these steps: Measure signal frequency Input the signal to channel 1. Press the “AUTO” button. Press the “MEASURE” button to see “Auto Measure Menu”.
  • Page 141 Press the “Type” option button and select “Time”. Press the “Source” option button and select“CH1”. Press the “CurA” button and turn the universal knob to place the cursor A on one peak of the ring. Press the “Cur B” button and turn the universal knob to place the cursor B on the nearest peak of the ring.

  • Page 142: Capturing A Single-Shot Signal

    You can see the following measurements on the top of the left screen:  The delta voltage (peak-to-peak voltage of the ringing)  The voltage at Cursor A.  The voltage at Cursor B. Figure 4.2 – Taking Cursor Measurements (Voltage) 4.3 Capturing a Single-Shot Signal To capture a single event, you need to gather some knowledge of the signal in order to correctly set up the trigger level and slope.

  • Page 143: Analyzing Signal Details

    Press “TRIG MENU” button to show the “Trigger Menu” b. Under this menu, set the trigger type to “edge”, Edge type is “Rising”, source is “CH1”, trigger mode is “Single”, coupling is “DC” Adjust the horizontal time base and vertical scale to the satisfied range d.

  • Page 144: Triggering On A Video Signal

    Press the “ACQUIRE” button to display the acquire menu. Press the “Acquisition” option button or turn the “Universal” knob to select “Average”. Press the “Averages” option button to see the effects of varying the number of running averages on the waveform display.

  • Page 145: Application Of X-Y Function

    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. 4.6 Application of X-Y Function ...
  • Page 146 Figure 4.3 - Out of Phase Signals (45 degrees) Figure 4.4 – Out of Phase Signals in XY Mode (45 degrees) 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...

  • Page 147: Analyzing A Differential Communication Signal

    4.7 Analyzing a Differential Communication Signal You are having intermittent problems with a serial data communication link and suspect poor signal quality. Set up the oscilloscope to show a snapshot of the serial data stream so you can verify the signal levels and transition times.

  • Page 148: Remote Control

    5 Remote Control The 2190D series digital storage oscilloscope can be remotely controlled by PC software application or user command programming. The 2190D comes with EasyScopeX 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.

  • Page 149: Message Prompts And Troubleshooting

    6 Message Prompts and Troubleshooting 6.1 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.

  • Page 150: Troubleshooting

     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.
  • Page 151 “edge” trigger mode. The video signal should use the “Video” Trigger mode. The signal would display steadily only when using matching trigger mode. Attempt to change the “coupling” into “HF Reject” or “LF Reject” display, so that the High/low frequency noise will be filtered.

  • Page 152: Specifications

    Utility menu, if the operating temperature changes by more than 5° C.  The oscilloscope must be within the factory calibration interval. All specifications are guaranteed unless noted “typical.” 2190D Inputs Input Coupling AC, DC, GND Input Impedance 1 MΩ ± 2% || 16 pF ± 3 pF, Maximum Input 400 V (DC+AC PK-PK, 1 MΩ...
  • Page 153 limit (AC -3 dB) 5 mV/div to 10 V/div in Fixed Gain Ranges: DC Gain Accuracy <±3.0% 2 mV/div Variable Gain Ranges: <±4.0% DC Measurement Accuracy: ± [3% × (|reading|+|offset|) + 1% × |offset| + All Gain settings ≤ 0.2 div + 2 mV] 100 mV/div DC Measurement Accuracy:...
  • Page 154 More details can be found in the Save/Recall CSV section. Trigger System Trigger Types Edge, Pulse Width, Video, Slope, Alternative Trigger Source CH1, CH2, EXT, EXT/5, AC Line Trigger Modes Auto, Normal, Single Trigger Coupling AC, DC, LF reject, HF reject CH1,CH2: ±...
  • Page 155 X-Y Mode X-Pole Input / Y-Pole Channel 1 (CH1) / Channel 2 (CH2) Input Phase Error ± 3 degrees Hardware Frequency Counter Reading resolution 1 Hz Range DC Couple, 10 Hz to MAX Bandwidth All trigger signals (except pulse width trigger Signal Types and video trigger) Control Panel Function...

  • Page 156: Calibration

    Simplified Chinese, Traditional Chinese, Language English, Arabic, French, German, Russian, Portuguese Spanish, Japanese, Korean, Italian Operating: 10 ℃ to + 40 ℃ Temperature Not operating: -20 ℃ to + 60 ℃ Cooling Cooling Fan Operating: 85% RH, 40 ℃, 24 hours Humidity Not operating: 85% RH, 65 ℃, 24 hours Operating: 3000m...

  • Page 157: Service Information

    SERVICE INFORMATION Warranty Service: Please go to the support and service section on our website at 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.

  • Page 158: Limited One-Year Warranty

    LIMITED ONE-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 one year from date of purchase. B&K Precision Corp. will, without charge, repair or replace, at its option, defective product or component parts.
  • Page 159 22820 Savi Ranch Parkway Yorba Linda, CA 92887 www.bkprecision.com © 2014 B&K Precision Corp. v080114...

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