Glossary of terms
|4:2:0||digital video signal chrominance sampling standard|
|4:2:2||digital video signal chrominance sampling standard – twice that of 4:2:0|
|4-wire||studio communication with separate send and return circuits enabling simultaneous bi-directional (two-way) conversations|
|601||digital video standard (CCIR 601)|
|acquiring the bird||locating the satellite|
|AGC||automatic gain control|
|amplitude modulation||a baseband message signal modulates (alters)the amplitude and frequency of a high frequency carrier signal at a nominally fixed frequency, so that the intensity, or amplitude, of the carrier wave varies in accordance with the modulating signal|
|analogue||signal which can take on a continuous range of values ...|
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