Electronics Lab Instruments Familiarization
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Questions and Answers

What is the purpose of the probe compensation output on the DSO?

  • To provide a reference signal for the DSO's triggering system.
  • To adjust the DSO's horizontal time scale.
  • To calibrate the DSO's internal clock.
  • To adjust the DSO's input impedance to match the probe's impedance (correct)
  • How many channels can the DSO display simultaneously?

  • Three
  • Two (correct)
  • Four
  • One
  • What color is the display for the CH-1 signal?

  • Blue
  • Yellow (correct)
  • Green
  • Red
  • What is the function of the "Volts/div" knob?

    <p>Adjusts the DSO's vertical sensitivity. (D)</p> Signup and view all the answers

    What is the length of the signal display part of the LCD screen in the X-axis?

    <p>10 cm (D)</p> Signup and view all the answers

    What is the purpose of the "Coupling" sub-menu?

    <p>Selects the coupling mode for the input signal (D)</p> Signup and view all the answers

    Which of the following is NOT a knob or button located on the DSO's front panel?

    <p>Digital zoom knob (C)</p> Signup and view all the answers

    How do you turn on or off Channel 1 (CH-1)?

    <p>Press the &quot;CH 1&quot; button. (C)</p> Signup and view all the answers

    Where are the input sockets for CH-1, CH-2, and the External Trigger located?

    <p>At the bottom of the DSO panel to the right of the display. (B)</p> Signup and view all the answers

    What is the peak-to-peak voltage of the sine wave that needs to be generated?

    <p>10 Volts (C)</p> Signup and view all the answers

    Which frequency setting should be used for generating the sine wave?

    <p>10 kHz (B)</p> Signup and view all the answers

    What adjustment is necessary for obtaining a stable display on the DSO?

    <p>Adjust the Trigger Level controls (B)</p> Signup and view all the answers

    Which waveform should be generated after the sine wave without changing the frequency?

    <p>Square and Triangle (B)</p> Signup and view all the answers

    How is the time period of the sine wave measured on the DSO?

    <p>Using the cursor values (B)</p> Signup and view all the answers

    What does the record length in a waveform determine?

    <p>The total number of waveform points in a record (B)</p> Signup and view all the answers

    Which of the following settings must be adjusted to take a measurement with an oscilloscope?

    <p>Vertical, horizontal, and trigger settings (D)</p> Signup and view all the answers

    What is the vertical resolution of the DSO 1022A?

    <p>8 bits (C)</p> Signup and view all the answers

    Which statement is true regarding the input coupling of the DSO 1022A?

    <p>It supports DC, AC, and ground coupling (D)</p> Signup and view all the answers

    What feature may be available on a digital oscilloscope to view events prior to the trigger point?

    <p>Pre-trigger (C)</p> Signup and view all the answers

    What is the time-base range of the DSO 1022A?

    <p>1 ns/div to 50 s/div (C)</p> Signup and view all the answers

    What is the maximum power consumption of the DSO 1022A?

    <p>18 W, 40 VA maximum (C)</p> Signup and view all the answers

    What types of waveforms can the function generator output?

    <p>Sine, square, and triangular waveforms (C)</p> Signup and view all the answers

    What is the output impedance of the connector mentioned?

    <p>50 ohms (C)</p> Signup and view all the answers

    Which measurement can the Agilent 34410A digital multimeter NOT perform?

    <p>Chemical composition analysis (A)</p> Signup and view all the answers

    What is the maximum DC voltage output of the Scientific Programmable Power Supply PSD9005?

    <p>30 V (D)</p> Signup and view all the answers

    What should not be done during the experiment with the DSO and FG?

    <p>Turn off the DSO or FG (D)</p> Signup and view all the answers

    Which of the following is NOT a feature of the Agilent 34410A digital multimeter?

    <p>Signal generation (C)</p> Signup and view all the answers

    In tracking mode operation of the PSD9005, how many outputs can be used?

    <p>Two outputs (A)</p> Signup and view all the answers

    What voltage levels does the TTL output waveform range from?

    <p>0 to 4 V (B)</p> Signup and view all the answers

    Which of the following is a method of measuring resistance provided by the digital multimeter?

    <p>Two-wire and four-wire measurements (A)</p> Signup and view all the answers

    What is the significance of the graphic LCD display in the PSD9005 power supply?

    <p>It displays power settings and adjustments visually (D)</p> Signup and view all the answers

    What is the main function of the 'GROUND' coupling mode?

    <p>Connects the input channel to ground, establishing a reference zero level. (D)</p> Signup and view all the answers

    What happens when a signal is properly triggered in a DSO?

    <p>A green 'T'D' message appears indicating successful triggering. (B)</p> Signup and view all the answers

    Which of these is NOT a triggering option available in the 'Type' setting of the DSO?

    <p>Frequency (D)</p> Signup and view all the answers

    What is the main purpose of the 'SINGLE' trigger mode in the DSO?

    <p>To acquire signals only once, immediately after pressing the 'SINGLE' button. (A)</p> Signup and view all the answers

    Which coupling mode is most commonly used for measuring both DC and AC components of a signal?

    <p>DC (A)</p> Signup and view all the answers

    What is the role of the 'Slope/Coupling' option in the triggering settings?

    <p>Defines the type of triggering event (e.g., rising or falling edge). (B)</p> Signup and view all the answers

    Using the 'AUTO' setting in the 'Mode' option of triggering ensures that:

    <p>The DSO automatically adjusts the triggering level for optimal signal display. (C)</p> Signup and view all the answers

    How do you switch back to the Continuous trigger mode after using the 'SINGLE' trigger mode?

    <p>Press the 'RUN/STOP' button. (B)</p> Signup and view all the answers

    Which of the following settings is considered the most common for normal use in a DSO?

    <p>Type: Edge, Source: CH1 or CH2, Slope: +ve or –ve, Coupling: DC (B)</p> Signup and view all the answers

    What is the purpose of the coupling mode in the triggering settings?

    <p>To filter out unwanted frequency components from the signal. (A)</p> Signup and view all the answers

    Flashcards

    Waveform Record

    The complete set of waveform points collected during a measurement.

    Record Length

    The number of waveform points used to create a waveform record.

    Trigger System

    Determines when the oscilloscope starts and stops recording data.

    Pre-trigger

    Allows viewing of events that occur before the trigger point.

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    Vertical Resolution

    The smallest change in voltage that the oscilloscope can measure, expressed in bits.

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    Real-time Sample Rate

    The rate at which the oscilloscope samples data, measured in samples per second.

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    Input Impedance

    The resistance the oscilloscope presents to the signal being measured.

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    Sine Wave

    A smooth periodic oscillation characterized by its frequency and amplitude.

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    Peak-to-Peak Voltage

    The difference between the maximum positive and maximum negative amplitude of a waveform.

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    Time Period (T)

    The duration of one complete cycle of a waveform, measured in seconds.

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    Frequency (f)

    The number of cycles of a waveform that occur in one second, measured in Hertz (Hz).

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    Oscilloscope Settings

    Adjustments made on the DSO to get a stable waveform display including trigger level and time base.

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    DSO Front Panel

    The interface with five main sections used for operating a Digital Storage Oscilloscope.

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    Function Soft Keys

    Five adjustable keys for controlling different functions on the DSO.

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    Power Switch

    The button used to turn the DSO on and off.

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    Variable Knob

    A dial on the DSO for adjusting settings like voltage scale.

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    Vertical Controls

    Knobs for adjusting the vertical scale and positioning on the DSO.

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    Channels CH-1 and CH-2

    Two separate paths for displaying signals, marked in different colors.

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    Volts/div Knob

    Control knob that sets the voltage per division on the Y-axis of the display.

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    Coupling Mode

    The setting that affects how signals are processed on each channel.

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    Input BNC Sockets

    Connectors for inputting signals into channels CH-1 and CH-2.

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    Waveform Output

    Output consisting of sine, square, and triangular waveforms.

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    TTL Output

    Output providing TTL waveform of 0–4 V-pp square wave.

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    Agilent 34410A

    A digital multimeter providing 6 ½-digit high-performance measurements.

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    Voltage Measurements

    The ability to measure both DC and AC voltage.

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    Frequency Measurements

    Capability to measure the frequency and period of signals.

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    DC Power Supply

    A device providing dual DC outputs 0-30 V at 1 A and auxiliary 5 V/5 A output.

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    Programmable Power Supply

    Allows for remote control and programming of power settings.

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    Tracking Mode

    A mode in which two DC outputs are linked to vary together.

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    Resistance Measurements

    Measures resistance using 2 and 4 wire methods.

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    Continuity Testing

    Checks if electrical paths are complete, typically using beeps.

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    DC Coupling

    Connects to both AC and DC levels of a signal, displaying the entire signal content.

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    AC Coupling

    Removes the DC content of a signal, displaying only the AC portion.

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    GROUND Mode

    A reference zero level mode that disconnects the signal and connects to ground.

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    Triggering

    The process of stabilizing signal display on a DSO; requires proper configuration.

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    Trigger Types

    Different configurations for triggering a signal display: Edge, Pulse, Video.

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    Continuous Trigger Mode

    Allows signals to be displayed continuously on the DSO.

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    Single Trigger Mode

    Acquires a signal only once upon pressing the trigger button, then stops.

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    RUN/STOP Button

    Button used to switch between continuous and single triggering modes.

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    Trigger Source

    The channel or input from which the trigger signal is taken (e.g. CH1, CH2, External).

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    Study Notes

    Experiment 01: Familiarization with Electronics Lab Instruments

    • Aim: Familiarization with Oscilloscopes, Function Generators, Digital Multimeters, and DC Power Supplies.

    Oscilloscopes

    • Function: A versatile instrument for measuring and displaying various signals.
    • Subsystems: Power supplies (high and low voltage), display subsystem, vertical and horizontal amplifiers, and display systems.
    • Types:
      • Analog Oscilloscopes (Cathode Ray Oscilloscopes - CRO): Visual display of voltage signals.
      • Digital Storage Oscilloscopes (DSO): Store and display waveforms digitally.
      • Mixed Mode (Analog/Digital): Combine analog and digital features.
    • Signal Display:
      • Input signal is converted to a voltage signal.
      • Transmitted via a cable, usually coaxial.
      • Signal may need amplification.
    • Analog Oscilloscope (CRO) Operation:
      • X and Y signals applied to horizontal and vertical plates of the Cathode Ray Tube (CRT).
      • Electrons create a spot of light on the fluorescent screen.
      • Beam deflection: Vertical deflection proportional to voltage, horizontal deflection follows a sweep signal.
      • For a periodic signal, a stable, repeating pattern displays the waveform on the screen.
      • Trigger controls synchronize the horizontal sweep with the vertical deflection.
      • High frequencies (>40Hz) show as solid lines.

    Digital Storage Oscilloscope (DSO)

    • Operation: Samples input waveform, uses ADC to convert voltage to digital information, reconstructs waveform.
    • Sampling: ADC samples the signal at discrete points in time.
    • Sample Rate: Rate at which the clock "ticks" (samples per second).
    • Record Length: Number of sample points used to make a waveform record.
    • Trigger System: Determines start and stop points of the record.
    • Additional Features: Pre-trigger option (display events before trigger point), and additional processing of sample points.
    • Major Specifications:
      • Model: DSO 1022A, M/s Agilent Technologies, USA
      • Bandwidth: DC to 200 MHz
      • Vertical range: 2 mV/div to 10 V/div
      • Vertical resolution: 8 bits
      • Real-time sample rate: 2 GSa/s (half channel), 1 GSa/s (each channel)
      • Time-base range: 1 ns/div to 50 s/div
      • Dynamic range: +6 div
      • DC gain accuracy, Input coupling, Input impedance, Channels, and more.

    Basic DSO Operations

    • Front Panel Sections: Five function soft keys, power switch, probe compensation, variable knob, and input connectors.
    • Sections: Various buttons and knobs for adjusting vertical, horizontal, and triggering settings.

    Channels CH-1 and CH-2

    • Display: Separate colored displays for each channel on the LCD screen.
    • Coupling Modes: DC, AC, and Ground.
    • Triggering: Using triggering controls, adjust the parameters to obtain a stable display. Different parameters are available such as Type: Edge, Pulse, Video; Source: CH 1, CH 2, External, Line; Slope/Coupling: Slope (+ve/-ve), Coupling (DC/AC), Rejection (Off/LF/HF), Noise Rej (Off/On); Mode: Auto, Normal.
    • Continuous vs. Single Trigger Modes: To acquire the signal continuously or just once.

    Function Generator (FG)

    • Function: Generates different voltage signals; Sine, Pulse, Triangle.
    • Application: Commonly used in electronic applications, particularly in Testing and signal analysis.
    • Frequency/Amplitude: Controls to adjust frequency and amplitude of output signals.
    • Models: AFG-3021B.

    Digital Multimeter

    • Features:
      • DC and AC voltage measurements
      • Resistance measurements (2 and 4-wire)
      • Continuity
      • Frequency/Period Measurements
      • Capacitance Measurements
      • Temperature Measurements (Thermistor and RTD)
    • Use: Measurement of various parameters in a circuit.

    DC Power Supply

    • Functionality: Programmable DC power supply, offering output parameters.
    • Use: Providing DC power in circuit experimentation

    Experiment Procedure

    • Displaying various functions: Use of Function Generator and Oscilloscope to display signals, measure parameters.
    • Observing Signals: Setting up the equipment and observe waveforms, measure peak-to-peak values for sine, square, and triangular waveforms.
    • Channel Input Coupling Modes: Analyzing the effects of DC and AC coupling modes on the output waveform.
    • XY Plot: Using XY plot facility to display the relationship between two input signals.
    • Potential Divider: Observing the output of a potential divider circuit on an oscilloscope.

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    Description

    This quiz focuses on the various instruments used in an electronics lab, including oscilloscopes, function generators, digital multimeters, and DC power supplies. You'll learn about different types of oscilloscopes and their operations, helping you understand how to measure and display electrical signals effectively.

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