Digital Electronics | Lecture 04 | Deflection Sensitivity of CRT

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Deflection sensitivity of a Cathode Ray Tube (CRT) refers to the relationship between the deflecting voltage applied to the CRT's deflection coils and the resulting deflection of the electron beam that scans the screen.

The deflection sensitivity of a CRT can be expressed as the number of centimeters of beam deflection produced by a given change in the applied deflecting voltage. It is typically measured in units of centimeters per volt (cm/V) or millimeters per volt (mm/V).

The deflection sensitivity of a CRT is an important parameter that affects the quality of the displayed image. A higher deflection sensitivity means that a smaller change in the deflecting voltage will produce a larger change in the deflection of the electron beam, resulting in a more accurate and precise image. Conversely, a lower deflection sensitivity may result in a distorted or fuzzy image.

The deflection sensitivity of a CRT can be affected by various factors, including the design of the deflection coils, the strength of the magnetic field used to deflect the beam, and the distance between the deflection coils and the electron gun. In general, CRTs with higher deflection sensitivities are more desirable, as they can produce sharper and more accurate images.