Analyzing Wavef
orms
Time measurements (cont.)
Measurement Description
- D uty C yc The ratio of the negative pulse width to the signal period expressed as a percentage. The duty
cycle is measured on the first cycle in the waveform or gated region.
Period
The time required to complete the first cycle in a waveform or gated region. Period is the reciprocal
of frequency and is measured in seconds.
Freq
The frequency of the first cycle in a waveform o r gated region. Frequency is the reciprocal of the
period; it is measured in Hertz (Hz) where one Hz is one cycle per second.
Delay
The time between the mid reference (default 50% ) amplitude point of two different waveforms.
More measurements
Measurement Description
Area
The area over the entire waveform or gated region in volt-seconds. Area measured above ground is
positive; area measured below ground is negative.
Cycle Area The area over the first cycle in the waveform or the first cycle in the gated region expressed in
volt-seconds. The area above the common reference point is positive w hile the area below the
common reference point is negative.
Phase
The amount of time that one waveform leads or lags another waveform, expressed in degrees
where 360° contains one waveform cycle.
Burst Width
The duration of a burst (a series of transient events) and is measured over the entire waveform
or gated region.
Histogram measurements
Measurement Description
Wfm Ct Displays the number of waveforms that have contributed to the histogram.
Hits in Box
Displays the number of points in or on the histogram box.
Peak Hits
Displays the number of points in the largest bin of the histogram.
Median
Displays the m iddle point of the histogram box. Half of all acquired points within or on the histogram
box are less than this value and half are greater than this value.
Max
Displays the voltage of the highest nonzero bin in vertical histograms or the time of the rightmost
nonzero bin in the horizontal histograms.
Min
Displays the voltage of the lowest nonzero bin in vertical histograms or the time of the leftmost
nonzero bin in the horizontal histograms.
Pk-Pk
Displays the peak-to-peak value of the histogram. Vertical histograms display the voltage of the
highest nonzero bin minus the voltage of the lowest nonzero bin. Horizontal histograms display the
time of the rightmost nonzero bin minus the time of the leftmost nonzero bin.
Mean
Measures the average of all acquired p oints within or on the histogram box.
Std Dev Measures the standard deviation (Root Mean S quare (RMS) deviation) of all acquired points within
or on the histogram box.
Mean ±1 Std Dev Displays the percentage of points i n the histogram that are within one standard deviation of the
histogram mean.
116 MSO70000/C, DPO/DSA70000B/C, DPO7000, and MSO /DP O5000 Series U ser M anual
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