Learn more about the measurement controls.
Extinction Ratio
Extinction ratio is the ratio of eye top to base. This measurement is only valid when the acquisition mode is set to WfmDB,
FastAcq is enabled, or the measurement is taken on a reference waveform saved in FastAcq mode.
Ext Ratio = pTopMean/pBaseMean
Extinction Ratio Percent
Extinction ratio percent is the ratio of eye base to top expressed as a percentage.
This measurement is only valid when the acquisition mode is set to WfmDB, FastAcq is enabled, or the measurement is taken on
a reference waveform saved in FastAcq mode.
Ext Percent = 100 × (pTopMean/pBaseMean).
Extinction Ratio Decibel
Extinction ratio decibel is the ratio of eye top to base expressed in decibels.
This measurement is only valid when the acquisition mode is set to WfmDB, FastAcq is enabled, or the measurement is taken on
a reference waveform saved in FastAcq mode.
ExtdB = 10 × Log(pTopMean/pBaseMean)
Eye Height
Eye height is the measurement of the eye height in volts.
Eye Height = (pTopMean-3 × pTopSigma) - (pBaseMean + 3 × pBaseSigma)
Eye Width
Eye width is the measurement of eye width in seconds.
Eye Width = (tCross2Mean-3 × pTopSigma) - (tCross1Mean + *tCross1Sigma)
Crossing Percent
Crossing percent measurement is the eye crossing point expressed as a percentage of eye height.
Crossing Percent = 100 × [(pCross1Mean - pBaseMean)/(pTopMean - pBaseMean)]
Eye Top
Eye Top is the top value used in the extinction ratio measurements.
Eye Top = pTopMean
Eye Base
Eye Base is the base value used in the extinction ratio measurements.
Eye Base = pBaseMean
Jitter Peak-to-Peak
Jitter p-p is the peak-to-peak value for the edge jitter in the current horizontal units.
Jitter PP = TCross1PP
Jitter Root Mean Square
Jitter RMS is the RMS value of the edge jitter in the current horizontal units.
Jitter RMS = TCross 1sigma
Measurement setups
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 281
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