Oscilloscope Reference Levels used in taking eye measurements
Learn more about mask testing. (see page 781)
Learn more about eye measurements. (see page 784)
Learn a bout communication triggering. (see page 704)
Go to mask testing setup. (see page 209)
Levels used
in taking eye measurements
All eye-di
agram m easurements are based on the power level, the voltage level, or the time locations of
edges within each acquisition.
The next fi
gure shows the areas of an eye-diagram used to calculate measurements.
P values
The P values include the mean and standard deviation o f the vertical location of PTop and PBase.These
areas are used with a spec ified sample size to statistically measure the following values
*
:
PTop Mean. This is the mean value of PTop.
PTop Sigma. This is the standard deviation of PTop.
PBase Mea n. This is the mean value of PBase within the Eye Aperture.
P
Base Sigma. This is the standard deviation of PBase within the Eye Aperture.
*
The Eye Aperture defaults to the center 20% of the interval from TCross
1
to TCross
2
.
784 DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series
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