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There is basically two cases:
(It is recommended to read about Cathode Ray Tube Deflection prior to read this)
1 - Electrostatic Deflection:
Is the voltage necessary to move the electronic beam by a unit of lenght. Usually is V/cm or V/in.
Since there is no significant current flowing on the deflection plates, and these kind of CRTs (Cathode Ray Tubes) are using on measuring devices (on wich the lenght of the trace on the screen will be measured in a way or another), only the voltage is relevant
on the specification of the CRT, and its effect on the moving of the bean.
CRT manufacturers made a tremendous effort to make the relationship between the Voltage on the plates and the beam deflection to be linear.
2 - Magnetic Deflection:
Used on most popular CRTs, as TVs, Monitors (now being replaced by LCDs).
Is the product of the square of the total (Ap-p)current needed to deflect the beam tottaly on the screen (from left to right - horizontal deflection, or top to bottom - vertical deflection), and the inductance of the coil.
It is understood as the minimum energy that the inductor (the deflection coil) must store to generate the magnetic field and move the beam totally on the screen.
Magnetic is the most complicated deflection since there are several factor affecting the performance of the circuit, i.e. coil resistance, geometric limitations, core saturation, variation of core permeability.
Is the product of the inductance of the coil by the peak-to-peak current, squared.
Most of the time is given in mHApp^2, but less often found in OhmsApp^2
Needless to say that the CRT using this kind of deflection uses several types of correction of linearity, because now the beam does no move in a linear way with the surface of the screen. The most popular are East-West correction, Pin-Cushion correction, and S-correction. There is basically two cases:
(It is recommended to read about Cathode Ray Tube Deflection prior to read this)
1 - Electrostatic Deflection:
Is the voltage necessary to move the electronic beam by a unit of lenght. Usually is V/cm or V/in.
Since there is no significant current flowing on the deflection plates, and these kind of CRTs (Cathode Ray Tubes) are using on measuring devices (on wich the lenght of the trace on the screen will be measured in a way or another), only the voltage is relevant
on the specification of the CRT, and its effect on the moving of the bean.
CRT manufacturers made a tremendous effort to make the relationship between the Voltage on the plates and the beam deflection to be linear.
2 - Magnetic Deflection:
Used on most popular CRTs, as TVs Monitors (now being replaced by LCDs).
Is the product of the square of the total (Ap-p)current needed to deflect the beam tottaly on the screen (from left to right - horizontal deflection, or top to bottom - vertical deflection), and the inductance of the coil.
It is understood as the minimum energy that the inductor (the deflection coil) must store to generate the magnetic field and move the beam totally on the screen.
Magnetic is the most complicated deflection since there are several factor affecting the performance of the circuit, i.e. coil resistance, geometric limitations, core saturation, variation of core permeability.
Is the product of the inductance of the coil by the peak-to-peak current, squared.
Most of the time is given in mHApp^2, but less often found in OhmsApp^2
Needless to say that the CRT using this kind of deflection uses several types of correction of linearity, because now the beam does no move in a linear way with the surface of the screen.
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What is vertical deflection plate?
As we mentioned earlier, a CRT can be used to graphically and visually plot an electronic signal,such as a sine wave. This is done by using a second set of deflection plates called VERTICAL-DEFLECTION PLATES
What is called the winding around the CRT yoke that deflects the electron beam with its magnetic field?
It's called a deflection coil. If a c.r.t. uses magnetic deflection, there will be two deflection coils, a horizontal one and a vertical one.
How does the anode voltage applied to the cathode ray oscilloscope affects the sensitivity of the CRO?
The anode voltage does not affect the sensitivity of a CRO. The input amplifier and deflection circuit have a greater influence. The Anode voltage will affect the focus and visibility of the trace, in this respect it will affect how you see the result.
What is the stream of particles originating from a cathode in a vacuum tube?
Not sure of the question, but *electrons flow from cathode to plate in a CRT. A deflection coil guides the electron beam to various areas of the screen. Some CRTs use electrostatic deflection, where the beam is deflected by four grids that steer the beam.
What is horizontal deflection?
The term horizontal deflection refers to how much something deviates from the horizontal line.
What is the deflection sensitivity of a cathode ray oscilloscope?
It is the deflection on the screen (meter) per volt of deflection
Why electromagnetic deflection is used in tv-crt rather than electrostatic as in cro?
Electromagnetic deflection is used because it can create greater deflection angles of the electron beam compared to electrostatic deflection.
What is deflection sensitivity of a cathode ray oscilloscope?
Depends on the design of the 'scope and it's "X" & "Y" deflection amplifiers.
What is magnetic deflection sensitivity of CRO?
ghanta le lo
Why time base circuit is used in a CRO?
It is used as the horizontal deflection voltage of the CRT.
What is VERTICAL deflection?
As we mentioned earlier, a CRT can be used to graphically and visually plot an electronic signal,such as a sine wave. This is done by using a second set of deflection plates called VERTICAL-DEFLECTION PLATES
What is vertical deflection plate?
As we mentioned earlier, a CRT can be used to graphically and visually plot an electronic signal,such as a sine wave. This is done by using a second set of deflection plates called VERTICAL-DEFLECTION PLATES
What is meant by electrostatics deflection in CRT?
Electrostatic deflection in a cathode ray tube (CRT) refers to the technique of using electric fields to control the trajectory of the electron beam. By applying varying electric potentials to the deflection plates situated around the electron beam, the beam's path can be manipulated to scan across the screen and create images. This method is key in directing the electron beam to draw the desired shapes and characters on the CRT display.
What is called the winding around the CRT yoke that deflects the electron beam with its magnetic field?
It's called a deflection coil. If a c.r.t. uses magnetic deflection, there will be two deflection coils, a horizontal one and a vertical one.
What is the unit of deflection sensitivity of cro?
The unit of deflection sensitivity of a Cathode Ray Oscilloscope (CRO) is volts per division on the vertical axis of the screen. It represents how much voltage change is needed to move the electron beam by one division vertically on the screen.
Sensitivity analysis - influence coefficients?
define sensitivity analysis - influence coefficients ?
Why is it the electromagnetic field strength above the CRT TV is higher than of its sides?
The deflection coils are circular and wrap around the center of the CRT. Now think about the shape. Which is closer to the center, the top or the sides?
