Introduction to and description of new services using O.P.B. (Data Packet Broadcasting) on the TV channel. Definition of some parameters specific to the data signal and methods of measuring them.
Considered as an analog signal, the data signal can be examined as a video signal. However, due to its specific structure, it can be broken down in the time domain into a series of elementary intervals inside which the signal shape is perfectly determined at point of origin.
From a digital point of view, the data signal can be described as a bit sequence. Its quality is then measurable by parameters linked to binary states. the lowest level of information being the bit.
Some equipments required for both analog and digital measurements will be described.