In radar: Radar means ratio detection and ranging and is used to detect and give the position (azimuth angle, elevation angle, and distance) of an object such as aircraft.In television: In television receiver, a cathode ray tube along with associated sweep circuits is used for the projection of the image.If the magnitude f v, and f h are noted from the pattern of the waveform displayed on the screen, knowing the actual value of f h, the value of the unknown frequency f v can be calculated The number of loops cut by the vertical line on the screen gives the frequency of the signal applied to the horizontal plates, i.e. The number of loops cut by the horizontal line on the screen gives the frequency of the signal applied to the vertical plates, i.e. From the waveform obtained, it is seen that
The controls provided are adjusted to get a sharp and well defined waveform of the signal on the screen. Measurement of frequency:- For measuring an unknown frequency of a signal, it has to be applied to the vertical deflection plates, along with a signal of known frequency applied to the horizontal deflection plates. Then, the various controls mentioned in the previous section are adjusted to obtain a sharp and well defined signal waveform on the screen. Study of waveforms:- In addition to the measurement of the amplitudes of voltages and currents, oscilloscopes are widely used to observe wave shapes.For the study of the wave forms, the signal to be studied is applied to the vertical deflection plates and a saw-tooth wave is applied to the horizontal deflection plates. The magnitude of an unknown current can also be measured using the above procedure. Then the amplitude of the unknown voltage will be given by Let the length of the vertical line be 1 cm. Then, keeping the vertical gain unchanged, the voltage to be measured is applied to the vertical input terminals of the CRO. Thus a calibration unit of 20 V/cm is obtained. Suppose the vertical line is one cm in length. Suppose a voltage of 20 V is applied to the vertical plates, and the vertical gain is adjusted till a good deflection is obtained. To measure the voltage, first the oscilloscope is calibrated using a known voltage in units of volts per cm. As already mentioned, when no voltage is applied to the horizontal plates, only a vertical line will be seen on the screen, whose height gives the amplitude of the voltage to be measured.Īll the oscilloscopes have their screens marked with vertical and horizontal lines in the form of a centimeter graph sheet. Measurement of voltage :-The amplitude of a voltage can be measured using a CRO by applying the voltage signal to the vertical deflection plates. Some important common applications are given below.
What is Applications of Cathode Ray Oscilloscope?ĬROs are widely used in electrical and electronics engineering for troubleshooting and for the measurement of various electrical quantities. Electrical Engineering - What is Applications of Cathode Ray Oscilloscope? Electrical Engineering ⇒ Topic : Applications of Cathode Ray Oscilloscope
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