Focal Illustrated Dictionary of Telecommunications

S

SA: Standards Australia.

SABM: Set Asynchronous Balanced Mode.

SAC: Standards Advisory Committee.

Safety Extra Low Voltage (SELV): A voltage, defined in IEC 950, which is non-hazardous even when occurring between an equipment (such as a computer) with a single fault and an attachment (such as a modem).

Sagnac fibre optic sensor: A sensor which uses a rotating optical fibre loop and mirrors to measure the angular velocity and angular displacement of light beams.

sample and hold: An analogue sampler used in Pulse Code Modulation (PCM) to sample analogue signals and hold them until the next sampling instant.

Sample Rate Converter (SRC): A device which converts between different sample rates, as used for recording digital audio signals.

sampling: ...