User`s guide

Note: If the Pattern Marker Option is not installed, connect a marker from your pattern
generator to channel 2 and select channel 2. With an externally supplied pattern
marker, uncheck the pattern marker box.
The Data Channel defaults to channel 1 and does not need to be changed.
• Press Specifications and configure for the setup you have.
Configuring these settings allows the tool to determine if the measured results pass or fail the
specification requirements. Therefore, it is critical that these settings reflect the actual test setup.
• Finally, press "Load Pattern" and choose the data pattern that is to be measured for this test.
• Press "Single/Acquire". Several views are available once the measurement is complete. All views are
displayed with the results summarized to the left of the plot.
Interpreting views (plots)
• Oscilloscope – Shows the voltage vs. time for a portion of the pattern.
• DCD + ISI Histogram - Shows the rising and falling edge histograms relative to the center time of all
edges measured.
• DCD + ISI vs Span - Shows a representation of the pattern.
• 1-Sigma - Shows the 1-sigma values over increasing number of UI, or the accumulation of random
jitter.
• FFT - Shows the spectral content of the jitter.
• Bathtub - Shows the predicted Total Jitter (TJ) at a specific BER—1*10
-12
.
• Summary - Shows a textual summary of the specifications measured along with Pass/Fail indicators.
Oscilloscope View
This view shows the voltage vs. time for a portion of the pattern.
© WAVECREST Corporation 2005 Section 4 - GigaView
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