In various channel codings
, several consecutive zeros are interrupted by a bit combination. In this context, one speaks of code violations or code violations.B3ZS, B6ZS and B8ZS
. The reason for this lies in the generation of the synchronous signal. These forcibly inserted bit combinations are called Bipolar Violation (BPV), they consist of two consecutive levels, one positive (+1) and one negative (-1), or vice versa. Which level state is used first depends on the level used for the last 1. If a positive level was used for the last 1, then the bipolar violation also starts with a positive level. In the other case with a negative level.