GLOSSARY
Italics refer to index or other glossary entries.
| AC | Alternating current. Electric current that changes direction of flow. See sine wave and DC. |
| Aliasing | Interference effects between parts of the signal with common features. |
| Amp | The standard unit of electric current. See voltage. |
| Amplifier | A device to increase signal level. To do so requires the supply of power. See Proc Amp. |
| Amplitude | Amount of signal. See level and Index. |
| Aspect ratio | The ratio of picture width to height. See Index. |
| B & B | Black and burst (sync and colour burst). |
| Bandwidth | See Index. |
| Bar graph | A linear thermometer-like electronic display of audio signal level. |
| Battery | A source of electrical energy held in chemical form. Also used to denote ... |
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