Benefiting from Digital Systems
Digital signals are binary in nature, and are either on or off.These states are very
precise, and unlike the continuous waveform that exists in analog systems, the
signal can be regenerated with accuracy regardless of noise and interference.This
is not to infer that digital signals are impervious to noise and static, but, rather,
these problems are easily detected in a digital system and can be compensated for.
This is made possible by the absolute values transmitted on the wire. Figure 1.5
illustrates a digital waveform.