Phase. Timing measurement. The amount of phase shift, expressed in degrees of the target waveform cycle, between the
MidRef crossings of two different waveforms. Waveforms measured should be of the same frequency or one waveform should be
a harmonic of the other.
Phase is a dual waveform measurement; that is, it is measured from a target waveform to a reference waveform. To get a
specific phase measurement, you must specify the target and reference sources.
Phase is determined in the following manner:
1. The first MidRefCrossing (MCross1Target) and third (MCross3) in the source (target) waveform are found.
2. The period of the target waveform is calculated (see Period above).
3. The first MidRefCrossing (MCross1Ref) in the reference waveform crossing in the same direction (polarity) as that found
MCross1Target for the target waveform is found.
4. The phase is determined by the following:
If the target waveform leads the reference waveform, phase is positive; if it lags, negative.
Phase is not available in the Snapshot display.
Positive duty cycle. Timing measurement. The ratio of the positive pulse width to the signal period, expressed as a percentage.
PositiveWidth is defined in Positive Width, following.
If Period = 0 or undefined then return an error.
Positive overshoot. Amplitude (voltage) measurement.
Note that this value should never be negative.
Positive width. Timing measurement. The distance (time) between MidRef (default = 50%) amplitude points of a positive pulse.
If MCross1Polarity = +
then
PositiveWidth = (MCross2 –MCross1)
else
PositiveWidth = (MCross3 – MCross2)
Oscilloscope reference
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 695
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