User`s guide

Interpreting views (plots)
• 1-Sigma view - Edges (or time) vs. 1-sigma
• Pk-Pk view - Edges (or time) vs. 1-sigma
• FFT N-clock view - Frequency vs. power
• FFT 1-clock view - Frequency vs. power (N-clock FFT with 20dB/decade Low Frequency roll-off)
• Summary view - View data in a text format and save user notes
1-Sigma View
Each point on the plot represents the 1-sigma value from a histogram of measurements. The user is able
to see how the 1-sigma value changes relative to accumulating clock periods. This provides information
about jitter accumulation.
Horizontal x-axis shows either Time or number of Edges over which a histogram is made.
Vertical y-axis shows the 1-sigma value.
Cursor coordinates are displayed on the bottom status line
This plot shows the accumulation of jitter. Periodic components indicate modulation is present.
The frequency and power of this jitter can then be seen in the FFT View.
© WAVECREST Corporation 2005 Section 4 - GigaView
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