Time Duration and Frequency Measurement
(Figure 14)
Set the SEC/DIV control to display one complete wave
form. Check that the CAL (Variable) control is in the detent
position. Measure the horizontal distance between the two
time measurement points (in divisions) and multiply this
distance by the setting of the SEC/DIV control.
The frequency o f this signal can be calculated by taking
the reciprocal of the measured time duration of one event.
For example, the time duration o f the waveform is
16.6 milliseconds. Using the formula:
Frequency * —
------
-
-----
;—
Time duration
Substituting the values:
60 Hertz
1
16.6 milliseconds
FORMULA:
HORIZONTAL y SEC/DIV
DISTANCE A SETTING
- TIM E OURATION
EXAMPLE:
DIVISIONS X MILLISECONDS/ “ ’ 6.6 MILLISECONDS
DIVISION
<2237-23) 2424 16
Figure 14. Example o f tim e duration and frequency measurement.
26
305 Operators
REV A SEP 1979
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