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Cro operation

Precautions while using Cathode Ray Oscilloscope

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Cro operation

A simplified block diagram of a typical oscilloscope is shown in Fig. 3. In general, the instrument is operated in the following manner. The signal to be displayed is amplified by the vertical amplifier and applied to the verical deflection plates of the CRT. A portion of the signal in the vertical amplifier is applied to the sweep trigger as a triggering signal. The sweep trigger then generates a pulse coincident with a selected point in the cycle of the triggering signal. This pulse turns on the sweep generator, initiating the sawtooth wave form. The sawtooth wave is amplified by the horizontal amplifier and applied to the horizontal deflection plates. Usually, additional provisions signal are made for appliying an external triggering signal or utilizing the 60 Hz line for triggering. Also the sweep generator may be bypassed and an external signal applied directly to the horizontal amplifier.


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Precautions
Familiarisation with the main oscilloscope controls
Trigger
Cathode ray oscilloscope
Adjusting the trace position and appearance
Cathode ray tube
Connecting the cro to the circuit
Switching the cro on
Operating instructions
Some simple oscilloscope experiments
Measuring the input signal
Digital storage oscilloscope
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