Manual CC2 © Grimm Audio
11
Hints
•
Select decent quality 75 Ohm coax cables and
certainly do not skimp on the quality of the
connectors.
•
Make cables no longer than necessary.
•
Cables add propagation delay. It is exceedingly rare
for differences in clock phase to affect the
interoperability of connected audio equipment, but
if it happens, using equal length cables throughout
helps.
•
Disconnect unused cables.
6. Jitter Explained
Jitter is an instability in the timing of a clock signal.
Ideally the rising or falling edges of a clock signal are all
separated by exactly the same amount of time. In
reality, the timing is more uncertain. The graph below
shows the time-domain view of the problem.
We can also look at the problem spectrally. An ideal
clock has only a single frequency components (and
harmonics). All energy is concentrated on an infinitely
narrow frequency band, see the top picture below.
When jitter is present, side bands occur. Some spectral
energy is located away from the clock. The faster the
A stable and a jittery clock signal
6.
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