E
XAMINING
C
LOCK
S
IGNALS AND
M
EASURING
J
ITTER
WITH THE
WAVECREST
SIA-3000™
Application note #
142
Introduction
The purpose of this application note is to highlight the various clock measurement tools
available in the
VISI
TM
software. The basic steps for specific tool setup and
interpretation of the resulting plots are covered. More details for each tool are provided
in the following
WAVECREST
Quick Reference Guides:
Understanding Jitter, SIA-
3000 Measurement Technique, Oscilloscope, Histogram, and High Frequency
Modulation
. These guides provide details of tool settings, measurement setup and
theory of measurement.
This application note will discuss how to use the various
VISI
TM
tools to fully
characterize your signal. These tools allow many different parameters of a clock signal
to be measured including:
•
Random Jitter (RJ)
•
Deterministic Jitter (DJ)
•
Total Jitter (TJ)
•
Periodic Jitter (PJ)
•
Cycle-to-Cycle Jitter
•
Duty Cycle
•
Frequency
•
Low Frequency Periodic Jitter
•
Spectral View of PJ and RJ
•
Timing Characteristics:
Positive Pulse width
Negative Pulse width
Period (rising edge to rising edge)
Negative Period (falling edge to falling edge)
•
Long term changes (varying Vcc or Temperature)
•
Skew or Propagation delay between any combination of rising and falling
edges on 2 channels
Clock Tools Overview
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