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Oscilloscope The oscilloscope is an instrument that will display the variation of a voltage with time on a flat screen monitor. The vertical axis is scaled off in volts while the horizontal axis is in units of time. The number of vertical and horizontal divisions on the screen is not fixed, but the majority have eight vertical divisions and 10 horizontal divisions. The basic components of an oscilloscope appear in Fig. 2.1. The signal of interest is applied to the vertical input. Depending on its strength, it may be reduced in level (attenuated) or increased in level (amplified). The horizontal input permits applying another signal of any

Oscilloscope The oscilloscope is an instrument that will display the variation of a voltage with time on a flat screen monitor. The vertical axis is scaled off in volts while the horizontal axis is in units of time. The number of vertical and horizontal divisions on the screen is not fixed, but the majority have eight vertical divisions and 10 horizontal divisions. The basic components of an oscilloscope appear in Fig. 2.1. The signal of interest is applied to the vertical input. Depending on its strength, it may be reduced in level (attenuated) or increased in level (amplified). The horizontal input permits applying another signal of any

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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I need help to understand what does oscilloscope is about in background theory.

kind to interact with the vertical input to produce a waveform that can often be quite informa- tive. However, if you simply want to view the signal applied to the vertical input versus time, then the sync input option is selected. The sweep oscillator will then generate a sawtooth wave- form, such as in Fig. 2.1, to move the applied signal across the screen. If the frequency of the applied signal and that of the sawtooth waveform are the same, the waveforms, are said to be "in syne" and the desired signal will sit stable on the screen. If the two frequencies do not match, the waveform will appear to be continually moving horizontally. Fortunately, all scopes have a sweep time control to adjust the frequency of the sawtooth waveform so a steady image can be displayed. Note in Fig. 2.1 that the voltage of a sawtooth waveform increases linearly (straight line) with time. This is to ensure that the applied signal will appear across the full width of the screen in an undistorted manner. For the case of an applied sinusoidal voltage, the voltage between the two input terminals will increase and decrease in an oscillatory manner. In the absence of the sawtooth waveform at the horizontal input, the waveform on the screen would simply be a vertical line with a high intensity spot moving up and down on the screen with the same frequency as the applied signal. Applying the sawtooth voltage to the horizontal input will move the waveform across the screen so the full sinusoidal pattern can be displayed. Most of the controls for the proper operation of an oscilloscope are mounted on the front panel of the instrument. Fig. 2.2 indicates the approximate locations of the controls found on most general-purpose oscilloscopes. The locations of the controls shown vary according to manufacturer. Table 2.1 describes the function of each. FIG. 2.2 Power Intensity divisions (in cm) (hor. & vert.) Fucus Triggering mode Triggering level y-Pos. Vertical display mode Y-Pos. X-position Sweep time Vertical sensitivity I Vertical sensitivity II horizontal sensitivity Vertical input1 Vertical input 2 de External ○ trigger Gnd God Dual channel 12 vertical input channels) Horizontal sweep controls
Transcribed Image Text:kind to interact with the vertical input to produce a waveform that can often be quite informa- tive. However, if you simply want to view the signal applied to the vertical input versus time, then the sync input option is selected. The sweep oscillator will then generate a sawtooth wave- form, such as in Fig. 2.1, to move the applied signal across the screen. If the frequency of the applied signal and that of the sawtooth waveform are the same, the waveforms, are said to be "in syne" and the desired signal will sit stable on the screen. If the two frequencies do not match, the waveform will appear to be continually moving horizontally. Fortunately, all scopes have a sweep time control to adjust the frequency of the sawtooth waveform so a steady image can be displayed. Note in Fig. 2.1 that the voltage of a sawtooth waveform increases linearly (straight line) with time. This is to ensure that the applied signal will appear across the full width of the screen in an undistorted manner. For the case of an applied sinusoidal voltage, the voltage between the two input terminals will increase and decrease in an oscillatory manner. In the absence of the sawtooth waveform at the horizontal input, the waveform on the screen would simply be a vertical line with a high intensity spot moving up and down on the screen with the same frequency as the applied signal. Applying the sawtooth voltage to the horizontal input will move the waveform across the screen so the full sinusoidal pattern can be displayed. Most of the controls for the proper operation of an oscilloscope are mounted on the front panel of the instrument. Fig. 2.2 indicates the approximate locations of the controls found on most general-purpose oscilloscopes. The locations of the controls shown vary according to manufacturer. Table 2.1 describes the function of each. FIG. 2.2 Power Intensity divisions (in cm) (hor. & vert.) Fucus Triggering mode Triggering level y-Pos. Vertical display mode Y-Pos. X-position Sweep time Vertical sensitivity I Vertical sensitivity II horizontal sensitivity Vertical input1 Vertical input 2 de External ○ trigger Gnd God Dual channel 12 vertical input channels) Horizontal sweep controls
RÉSUMÉ OF THEORY Oscilloscope The oscilloscope is an instrument that will display the variation of a voltage with time on a flat screen monitor. The vertical axis is scaled off in volts while the horizontal axis is in units of time. The number of vertical and horizontal divisions on the screen is not fixed, but the majority have eight vertical divisions and 10 horizontal divisions. The basic components of an oscilloscope appear in Fig. 2.1. The signal of interest is applied to the vertical input. Depending on its strength, it may be reduced in level (attenuated) or increased in level (amplified). The horizontal input permits applying another signal of any Vertical input Vertical attenuator Vertical amplifier Intensity Horizontal mode selector Horizontal input Horizontal attenuator Horizontal amplifier "sweep Synch input FIG. 2.1 Focus Vertical position CRT Synch mode selector and associated circuits Sweep oscillator Horizontal position
Transcribed Image Text:RÉSUMÉ OF THEORY Oscilloscope The oscilloscope is an instrument that will display the variation of a voltage with time on a flat screen monitor. The vertical axis is scaled off in volts while the horizontal axis is in units of time. The number of vertical and horizontal divisions on the screen is not fixed, but the majority have eight vertical divisions and 10 horizontal divisions. The basic components of an oscilloscope appear in Fig. 2.1. The signal of interest is applied to the vertical input. Depending on its strength, it may be reduced in level (attenuated) or increased in level (amplified). The horizontal input permits applying another signal of any Vertical input Vertical attenuator Vertical amplifier Intensity Horizontal mode selector Horizontal input Horizontal attenuator Horizontal amplifier "sweep Synch input FIG. 2.1 Focus Vertical position CRT Synch mode selector and associated circuits Sweep oscillator Horizontal position
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