User`s guide

FFT View
The FFT view shows a frequency analysis of the jitter. When Deterministic Jitter is present, it is often
periodic and can be identified in this jitter spectrum view. The summary on the left shows the amplitude of
the largest Periodic Jitter (PJ pk-pk) spike. The frequency of the spike is labeled 'Pjfreq'. By identifying and
trying to remove the cause of the largest spikes will reduce overall Deterministic Jitter.
This measurement has a fixed –3dB Corner Frequency High Pass Filter that is F
carrier
/1667. Frequencies below
this will be significantly attenuated.
For a detailed description of the underlying theory of this measurement, refer to the "High Frequency
Modulation Getting Started Guide".
Section 4 - GigaView © WAVECREST Corporation 2005
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