Commands Listed in Alphabetical Order
PEAKHits measu
res the number of points in the largest bin of the histogram.
PDUty (positive duty cycle) is the ratio of the positive pulse width to the signal
period, expre
ssed as a percentage. It is measured on the first cycle in the
waveform or gated region.
Positive Du
ty Cycle = ((Positive Width)/Period) × 100%
PEDGECount is the count of rising edges.
PERIod is 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.
PHAse measures the phase difference (amount of time a waveform leads or lags
the reference waveform) between two waveforms. The measurement is made
between t
he middle reference points of the two waveforms and is expressed in
degrees, where 360° represents one waveform cycle.
PK2Pk (p
eak-to-peak) finds the absolute difference between the maximum and
minimum amplitude in the entire waveform or gated region. This measurementis
applicable only to the analog channels.
POVershoot is the positive overshoot value over the entire waveform or gated
region. This measurement is applicable only to the analog channels.
Positive Overshoot = ((Maximum - High) / Amplitude) ×100%
PPUL
SECount
is the count of positive pulses.
PWIdth (positive width) is the distance (time) between the middle reference
(de
fault = 50%) amplitude points of a positive pulse. The measurement is made
on the first pulse in the waveform or gated region.
RI
Se
timing measurement finds the rise time of the waveform. The rise time is
the time it takes for the leading edge of the first pulse encountered to rise from a
low reference value (default is 10%) to a high reference value (default is 90%).
This measurement is applicable only to the analog channels.
RMS amplitude measurement finds the true Root Mean Square voltage in the
entire waveform or gated region. This measurement is applicable only to the
analog channels.
SIGMA1 (histogram measurement) measures the percentage of points in the
histogram that are within one standard deviation of the histogram mean.
SIGMA2 (histogram measurement) measures the percentage of points in the
histogram that are within two standard deviations of the histogram mean.
SIGMA3 (histogram measurement) measures the percentage of points in the
histogram that are within three standard deviations of the histogram mean.
STDdev measures the standard deviation (Root Mean Square (RMS) deviation) of
all acquired points within or on the histogram box.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-427
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