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In CRO, the measurement of time period is obtained by the product of the number of divisions occupied by one cycle and ________.
Division/cycle
Division/time
Time/cycle
Time/Division
Time/Division
In a Cathode Ray Oscilloscope (CRO), the time base generator sweeps the electron beam horizontally at a calibrated rate. The Time/Division setting (often labeled as Time/cm or Time/div) defines the duration each horizontal division represents on the screen.
In a Cathode Ray Oscilloscope (CRO), the time base generator sweeps the electron beam horizontally at a calibrated rate. The Time/Division setting (often labeled as Time/cm or Time/div) defines the duration each horizontal division represents on the screen.
T=N├ЧS тАФ where T is the time period, N is the number of horizontal divisions per cycle, and S is the time base setting in units of divisiontimeтАЛ.
To determine the time period of an observed signal, the user counts the number of horizontal divisions (N) spanned by one complete cycle of the waveform. This count is then multiplied by the calibrated time base setting (S) of the CRO, which is expressed in units of time per division (e.g., ms/div or ╬╝s/div).
The horizontal axis of the CRO represents time, controlled by the horizontal amplifier.
The time per division is the inverse of the sweep frequency of the time base generator.
Precise measurement requires the 'Variable' time/div knob to be set to the 'Calibrated' (CAL) position.
Allows direct visual measurement of periodic signals.
Enables observation of transient waveforms.
Requires manual counting, which is prone to human error.
Calibration must be verified regularly against a known reference.
Frequency measurement of periodic signals.
Analyzing phase shift between two signals (Lissajous patterns).
Measurement of signal rise and fall times.
The horizontal scale is calibrated in seconds per division (s/div) or its sub-multiples.
Option A (Division/cycle) is incorrect because it is only the first part of the calculation, not the total time period.
Option B (Division/time) represents the reciprocal of the sweep speed, which is not the standard calibration unit.
Option C (Time/cycle) is the definition of the Time Period itself, not the CRO setting.
D is correct тАФ The time period is obtained by multiplying the number of horizontal divisions occupied by one cycle by the Time/Division setting of the CRO.
Always ensure the 'Variable' control on the time/div knob is locked in the 'Cal' position before measurement, otherwise the time calculation will be incorrect.
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