#Cathode ray generator#

Once the electron ray leaves the electron gun then this ray will pass throughout the two sets of the deflecting plate. Here, a cathode ray oscilloscope utilizes an electrostatic focusing tube. The electron ray can be focused on using two techniques like Electrostatic & Electromagnetic focusing. The anodes like accelerating & pre-accelerating are connected to 1500v & the focusing electrode can be connected to 500v. The electron ray is concentrated on electrodes to flow throughout the deflection plates like horizontal and vertical & supplies on to the fluorescent lamp. When electrons flow throughout the control grid then it accelerates with the help of a high positive potential which is applied to the pre-accelerating or accelerating nodes. So, it controls the strength of the generated electrons from the cathode. Once the electrons are generated from the cathode grid, then it flows throughout the control grid that is generally a nickel cylinder through a centrally situated co-axial by the axis of CRT. At the cathode end, the strontium & barium layers are deposited to obtain the high electrons emission of electrons at the moderate temperature, the layers of barium, and are deposited at the end of the cathode. This gun mainly includes a heater, a grid, cathode, and anodes like accelerating, pre-accelerating & focusing. The main function of the electron gun is to emit the electrons to form them into a ray. These actions are autonomous from each other and thus the ray may be located anyplace on the monitor. The vertical deflection plate will turn the ray up & down whereas the horizontal ray moved the electrons beams from the left side to the right side. The main function of this electron gun is used to generate a focused electronic ray that speeds up to high frequency. This tube includes the electron gun as well as the electrostatic deflection plates. The CRO is the vacuum tube and the main function of this device is to change the signal from electrical to visual. The construction of CRO includes the following. It moves to make the necessary waveform of the input signal. The spot on the phosphor monitor turns due to the effect of these two electrostatic forces which are mutually perpendicular. A Cathode Ray Oscilloscope applies the electrostatic energy on the electron ray from two vertical ways. Once an electron ray hits a phosphor face, then it makes a bright spot on it. The CRO working principle depends on the electron ray movement because of the electrostatic force. Hence the horizontal deflection starts at the same point as the input signal.

If the electron beam is detected in the X-axis and the Y-axis a trigger circuit is given for synchronizing these two types of detections. Thus, it can amplify the signal to a level that will be provided the deflection of the electron beam. The signals are passed from the vertical deflection plate through the vertical amplifier.

#Cathode ray generator#

Just before detecting the electron beam on the screen in the horizontal direction which is in X-axis a constant time-dependent rate, a time base generator is given by the oscillator. The horizontal and vertical plates are placed between the electron gun and the screen, thus it can detect the beam according to the input signal. The normal voltage supply is necessary for other control units of the oscilloscope. A high voltage is required for the cathode ray tube to speed up the beam. The low voltage is used for the heater of the electron gun to generate the electron beam. Here we will use high voltage and low voltage. This provides the power supply circuit of the oscilloscope. To complete this task we need various electrical signals and voltages. By detecting the beam above the screen in reply to the electrical signal, the electrons can act as an electrical pencil of light which produces a light where it strikes. Thus, the screen produces a visible spot where the electron beam strikes with it. In an oscilloscope, the CRT produces the electron beam which is accelerated to a high velocity and brings to the focal point on a fluorescent screen. The CRO recruits the cathode ray tube and acts as a heat of the oscilloscope. The following block diagram shows the general-purpose CRO contraction. Cathode Ray Oscilloscope Block Diagram of CRO By seeing the waveform, we can analyze some properties like amplitude, frequency, rise time, distortion, time interval, and etc.

The oscilloscope observes the changes in the electrical signals over time, thus the voltage and time describe a shape and it is continuously graphed beside a scale. In the early days, it is called as an Oscillograph. The cathode ray oscilloscope is an electronic test instrument, it is used to obtain waveforms when the different input signals are given.