Experiment: Training Oscilloscope (230 V, 50/60 Hz)

Experiment: Training Oscilloscope (230 V, 50/60 Hz), 8000670 [UE3070800-230], Electron tubes
Thematic focus: ..
•  Investigating the deflection of an electron beam in an electric field.
•  Investigating the deflection of an electron beam in a magnetic field.
•  Calibrating the frequency control of the sawtooth generator.
•  Demonstrating the display of signals on an oscilloscope, using the periodic signal from a function generator.

Experiment description: ..
The student oscilloscope can be used to study the physical principles of the time-resolved display of electrical signals on a fluorescent screen. In a Braun tube, a focused electron beam is generated, and the point at which it falls on the fluorescent screen is observed as a spot of green light. When the electron beam is deflected by a sawtooth voltage applied between a pair of plates, it moves at a constant speed from left to right across the screen, then flies back to the starting point. This process is repeated cyclically at a frequency that can be adjusted. The time-dependent voltage that is to be displayed is applied to a coil outside the tube, so that the beam is deflected vertically in the magnetic field of the coil. The time-dependence of the signal is resolved by the simultaneous horizontal motion of the electron beam and displayed on the fluorescent screen.


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Item No.: 8000670 [UE3070800-230]
Brand 3B Scientific
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