5 Measurements and Math Functions
164 InfiniiVision 7000B Series Oscilloscopes User’s Guide
To isolate an event for frequency measurement The following figure shows
how to use Zoom mode to isolate an event for a frequency measurement.
If the measurement is not possible in the Zoom mode, then the normal
time base is used. If the waveform is clipped, it may not be possible to
make the measurement.
Figure 19 Isolating an event for Frequency measurement
Period
Period is the time period of the complete waveform cycle. The time is
measured between the middle threshold points of two consecutive,
like- polarity edges. A middle threshold crossing must also travel through
the lower and upper threshold levels which eliminates runt pulses. The X
cursors show what portion of the waveform is being measured. The Y
cursor shows the middle threshold point.
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