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#CATHODE RAY DEFINITION GENERATOR#
This trigger pulse generated from the time-based generator is amplified with the help of the horizontal amplifier.Īfter this, it is fed to horizontal deflection plates. When the signal from the vertical amplifier is fed to the vertical deflection plates, then some part of the amplified signal is supplied to the time base generator. This is because the deflection of the electron beam in the horizontal direction will be effective only when the signal applied from the output of the horizontal amplifier is high enough to create the bright spots at the desired location on the phosphor screen. The horizontal amplifier is the crucial part. This is helpful to create the waveform along with the time domain. The horizontal deflection plates deflect the beam along the horizontal direction. The horizontal amplifier generates the signal which provides voltage to horizontal deflection plates. Thus, the vertical amplifier is a significant device. If a low-intensity signal strikes the vertical deflection plate, the electron beam will not be deflected effectively to create the bright spots on desired points on the screen. The vertical amplifier receives the input signal and then amplifies it so that the signal of high intensity is supplied to the vertical deflection plate. The vertical amplifier receives the input from the signal which is to be measured. It is due to this deflection phenomenon the luminous spots are created on different parts of the screen, and thus waveform can be seen by these luminous spots. The extent of deflection is directly dependant on the signal which is received from the output terminal of the vertical amplifier and the horizontal amplifier. The electron beam suffers from deflection due to the presence of vertical deflection plate and horizontal deflection plate. When the light ray strikes the phosphor screen, a bright spot or luminous spot is created. The beam of an electron when generated by the electron gun is passed from vertical deflection plate and horizontal deflection plate and it creates the pattern on the phosphor screen. It must be noted that the voltage applied to the electron gun is quite low while the voltage applied for accelerating the beam of electron is very high. The electron gun generates the beam of an electron when the voltage is applied to it. The cathode ray tube consists of an electron gun, vertical deflection plates, horizontal deflection plates, phosphor screen and electrode. We will start with cathode ray tube which is the backbone of Oscilloscope. Let’s discuss these parts one by one in detail. Let’s discuss what are those parts which made up a device which can generate the waveform. To understand the block diagram more clearly we need to focus on its major parts.
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The functionality of Oscilloscope can be interpreted more easily with the help of its block diagram. These electrical quantities are expressed in terms of voltage and current which can be easily measured with the help of oscilloscope.įor waveshaping applications, an oscilloscope is considered very significant as any kind of waveforms can be generated with the help of Oscilloscope. But their physical appearance does not provide a single basis to measure such quantities.įortunately, the invent of transducers has alleviated this problem, as with the help of it any physical quantity can be converted into an electrical quantity. This is because in the realm of instrumentation we deal with measurement of physical quantities such as pressure, temperature, displacement. Their properties are independent from the electrodes and gas present in the cathode ray tube.The non-electrical quantities can also be measured with the help of Oscilloscope, but we need to convert it in electrical form before applying it to input terminals of Oscilloscope because only electrical quantities can be given as an input to the Oscilloscope.Ĭathode ray Oscilloscope is considered to be the heart of electronics instrumentation.They travel from the cathode to the anode.Charge/mass ratio of the rays is constant.Cathode ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to create the image in a classic television set. He showed the rays were composed of a previously unknown negatively charged particle, which was later called the electron.
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They were first observed in 1869 by German physicist Johann Hittorf, and were named in 1876 by Eugen Goldstein Kathodenstrahlen, or cathode rays.Įlectrons were discovered as the constituents of cathode rays in 1897 by British physicist J. A cathode ray tube aims the ray at a point on its screen. It is called a "cathode ray" because the electrons are being emitted from the negative charged element in the vacuum tube called the cathode. A cathode ray is a stream of electrons that are seen in vacuum tubes.