Symmetricom TimeSource 3600, Manual

Page: 26 / 254

26
TimeSource 3600
S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
Functional Description
Overview
Figure 6 shows the main functions of the TimeSource 3600. The
center of the TimeSource 3600 is the BesTime Ensemble Timing
Generator, which uses the BesTime algorithm to analyze the phase
and frequency relationships, individually and collectively, of the
timing sources. Each type of timing source has a particular
characteristic that gives it an advantage over other sources, as
listed in Table A.
The BesTime algorithm uses the best characteristic of each source
to produce an output signal with greater overall accuracy and
stability than any single source. The contribution of a source is
based on its deviation from the weighted average of all the
sources. The more accurate a source, the more weight it has in the
final output. Every source is under constant evaluation and its
contribution subject to periodic adjustment. The output is
essentially the best performance of the best source.