Altera JNEye User Manual
Page 99
Figure 2-75: Waveform Spectrum Plot
Rise/Fall Time Histogram Plots
JNEye calculates the rise/fall time across the bit time boundary.
Note: JNEye computes the rise/fall time based on the presented waveform. JNEye assumes there are no
over- or under-shootings that are commonly seen when transmitter and receiver equalization
effects are present. Furthermore, with a channel effect such as ISI, the waveform transition time
may be slowed down dramatically compared to a transmitter output waveform. Therefore, you
may see rise/fall times exceed the bit time boundary. You must use proper judgment when
interpreting the rise/fall time results.
UG-1146
2015.05.04
JNEye Data Viewer Module
2-93
Functional Description
Altera Corporation
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