The input to an analog-to-digital converter (ADC) consists of a voltage that varies among a theoretically infinite number of values. Examples are sine waves, the waveforms representing human speech, and the signals from a conventional television camera. The output of the ADC, in contrast, has defined levels or states. The number of states is almost always a power of two -- that is, 2, 4, 8, 16, etc.
Demerit points The Demerit Points Scheme is a national program that allocates penalty points (demerits) for a range of driving offences. The scheme is designed to encourage safe and responsible driving. Along with financial penalties, demerit points provide a strong incentive to drive within the law.
The learner licence system does not use demerit points; licences can be cancelled or suspended at the discretion of a court or Roads and Maritime Services upon committing an offence. However, laws were passed in October 2008 to introduce a demerit point system for learner drivers, expected in late 2009.