Cathode Ray Oscillooscope - Working

The Cathode Ray Oscilloscope

The CRO is a perfect voltmeter as its input resistance is very high indeed.

· We measure the voltage on the vertical axis, which is controlled by the y-plates. We can adjust the sensitivity by turning the knob marked y-gain or voltage gain.

· The horizontal direction is determined by the time base setting. It controls the number of times the beam is swept across the screen every second. We can change this by using the time base knob which controls the x-plates.


OSCILLOSCOPES DEFINITION (continued): … High-end oscilloscopes candisplay signals having frequencies up to several hundred gigahertz (GHz). The display is broken up intoso-called horizontal divisions (hor div) and vertical divisions (vert div). Time isdisplayed from left to right on the horizontal scale. Instantaneous voltage appearson the vertical scale, with positive values going upward and negative values goingdownward.The oldest form of oscilloscope, still used in some labs today, is known as the cathode-rayoscilloscope. It produces an image by causing a focused electron beam to travel, or sweep, in patternsacross the face …

to know more about this topic :-http://en.wikipedia.org/wiki/Oscilloscope