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Measurement Definition
Measurement Parameter Definition
Figure 5-16
Counting Popcorn Noise
In order to trigger a count, the input signal must cross both the threshold level and the
lower limit of the hysteresis window at points a and b. If the lower peak of the input signal
does not cross the lower limit of the hysteresis window, this will not trigger a count even if
the next peak amplitude crosses over the threshold level at point c. As shown in Figure
5-16 (left) a narrow hysteresis window translates to high sensitivity in detecting popcorn
noise particularly at low amplitudes.
Count # specifies the number of times to count popcorn noise. As shown in the figure
above, for each count# the detected popcorn noise for both positive and negative
amplitudes are counted as failcount(+) and failcount(-) by their respective thresholds. If the
number of counted popcorn noise exceeds the maximum number of allowable failcounts,
the excess failcounts will not be counted. Refer to "hpe5022_popcornNoiseCt_Q" function
of the programming manual for details.
Chapter 5
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