Applications
Figure 3-5. Measuring time duration.
6. Calculate time duration using the following formula:
Time
Duration
horizontal SEC/DIV
distance x switch
(divisions) setting
magnification factor
EXAMPLE. In Figure 3-5, the distance between the time mea
surement points is 8.3 divisions, and the SEC/DIV setting is 2 ms
per division. Horizontal MODE is set to X I.
Substituting the given values:
Time Duration = 8.3 div x 2ms/div = 16.6 ms
Period and Frequency
In the preceding example, you measured the time duration of one
complete waveform cycle. This particular measurement is called
the waveform period (T). The frequency (f) of a recurrent signal
can be determined from its period as follows:
1. Measure the time duration of one waveform cycle (period)
using the preceding time-duration measurement procedure.
2. Calculate the reciprocal of the period to determine the wave
form frequency.
3-8
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