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Chapter 10 Real-time Eye Diagram and Jitter Analysis (Option)
width for the second measurement result, and so on, until all of the cycles
of the waveform have been measured.
Jitter edge
⚫
When the measurement item is "TIE" or "Cycle to Cycle", you need to set the
edge for the measurement signal. The edges include Rising, Falling, and Either.
Press Slope, and then rotate the multifunction knob
edge. Then press down the knob to select it. You can also press Slope
continuously or enable the touch screen to select it.
Jitter trend graph
⚫
The trend graph can display the trend of the jitter measurement results. The
data obtained from the waveforms of the same frame are generated to form a
curve, which enables users to find out the cause for jitter.
Press Trend continuously to enable or disable the display of the trend graph.
Note：When the clock recovery method is set to "PLL", the PLL system cannot
reach the expected ideal clock frequency until it reaches the specified
lock time. During the lock time, the TIE jitter measurement results
based on the ideal recovery clock are incorrect. The data produced
during this time will be discarded in data processing. Therefore, in the
TIE jitter trend graph based on the PLL recovery, part of trend graph at
the left section of the screen will be lost. When a message "Invalid
settings" is displayed below the trend graph, please modify the loop
bandwidth, the horizontal timebase, or other related settings to make
valid measurements.
Jitter histogram
⚫
The histogram shows the distribution of the jitter measurement results.
Gaussian distributions indicate random jitter, and non-Gaussian distributions
indicate the deterministic jitter.
Press Histogram continuously to enable or disable the display of the
histogram.
MSO8000 User Guide
RIGOL
to select the desired
10-9
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