cone of silence

[′kōn əv ′sī·ləns] (navigation) A cone-shaped region, directly over the antenna of a radio-beacon transmitter, in which no signal is detected.

cone of silence

i. An inverted cone-shaped space directly over the aerial towers of some forms of radio beacons, in which signals are unheard or greatly reduced in volume.
ii. In some repeater installations using high-gain antennae, located above the level of average terrain, a cone of silence exists under the antennae. This zone may extend outward for several miles in all directions at ground level. This makes a nearby repeater useless.
iii. An approximately coned-shaped extent of space extending from a radar transmitting set and through which pulses are not sent because of inadequate antenna coverage.

单词	cone of silence
释义	cone of silence cone of silence An inverted cone-shaped space directly over the aerial towers of some forms of radio beacons in which signals are unheard or greatly reduced in volume. See also Z marker beacon. cone of silence cone of silence [′kōn əv ′sī·ləns] (navigation) A cone-shaped region, directly over the antenna of a radio-beacon transmitter, in which no signal is detected. cone of silence i. An inverted cone-shaped space directly over the aerial towers of some forms of radio beacons, in which signals are unheard or greatly reduced in volume. ii. In some repeater installations using high-gain antennae, located above the level of average terrain, a cone of silence exists under the antennae. This zone may extend outward for several miles in all directions at ground level. This makes a nearby repeater useless. iii. An approximately coned-shaped extent of space extending from a radar transmitting set and through which pulses are not sent because of inadequate antenna coverage. AcronymsSeeCOS
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