Measurement of amplitude, frequency,time period (using

DIPLOMA IN ECE

1. Measurement of amplitude, frequency,time period (using CRO) .

2. INTRODUCTION The cathode-ray oscilloscope ( CRO ) is a common laboratory instrument that provides accurate time and aplitude measurements of voltage signals over a wide range of frequencies.

3. Cathode Ray Oscilloscope .

4. Measurements by using CRO Measurement of Amplitude Measurement of Frequency Measurement of Time Period

5. Measurement of Amplitude Measuring the peak value ( amplitude ), peak-to-peak value, and frequency of an ac supply using an oscilloscope . Inside the oscilloscope , an electron beam is fired at the screen.

6. Measurement of Frequency That frequency is measured in Hz (Hertz) and equals the number of times the signal repeats itself in a time of one second (the cycles per second). The period is the interval of time of one cycle in a repeating occurrence, thus the period is the reciprocal of the frequency .

7. Measurement of Time Period CRO displays the voltage signal as a function of time on its screen. The Time period of that periodic voltage signal is constant, but we can vary the number of divisions that cover one complete cycle of voltage signal in horizontal direction by varying time /division knob on the CRO panel.

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