![]() The negative voltage at the control grid controls the flow of electrons in the electron beam, and consequently, the brightness of the spot on the CRO screen is controlled.The accelerated electron beam passes through the fine hole.The cathode emitting the electrons is surrounded by a control grid with a fine hole at its centre. The electrodes are connected to the base pins. ![]() The electron beam consists of an indirectly heated cathode, a control grid, an accelerating electrode and a focusing anode.In the electron gun of the CRT, electrons are emitted, converted into a sharp beam and focused upon the fluorescent screen.A detailed diagram of the cathode-ray oscilloscope is given in Fig. The electron gun or electron emitter, the deflecting system and the fluorescent screen are the three major components of a general purpose CRT.The central unit of the oscilloscope is the cathode-ray tube (CRT), and the remaining part of the CRO consists of the circuitry required to operate the cathode-ray tube.īlock diagram of a cathode-ray oscilloscope:ĬOMPONENTS OF THE CATHODE-RAY OSCILLOSCOPE: The CRO consists of the following:.CROs are used to study waveforms, and other time-varying phenomena from very low to very high frequencies. A moving luminous spot over the screen displays the signal.and strain can be converted into electrical signals by the use of transducers, and the signals can be displayed on the CRO.Many physical quantities like temperature, pressure It can measure amplitude, frequencies and phase shift of various signals. ![]()
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