Manual CC2 © Grimm Audio
13
Imagine the signal on top. The AD converter samples it
at neatly uniform intervals. The DA converter
reconstructs the correct values but it gets the timing
wrong. The difference between the red and blue curve
shows the error. Or take the converse: the DAC is fine
but the ADC took samples at the wrong time. The effect
is much the same. What’s worse in this case is that the
numbers we’ve recorded are now wrong. In the previous
case we could slap in a better DAC, with a jittery ADC the
game is over.
Jitter in AD (top) and DA (bottom) converters
6.
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