The area of reduced signal strength in a non directional beacon is called as ______(a) Cone of silence(b) Zero reception zone(c) Zone of silence(d) Non radio zoneThe question was posed to me in semester exam.This key question is from Point Source Radio Systems in portion Terrestrial Radio Navigation System of Avionics

The area of reduced signal strength in a non directional beacon is cal

1.	The area of reduced signal strength in a non directional beacon is called as ______(a) Cone of silence(b) Zero reception zone(c) Zone of silence(d) Non radio zoneThe question was posed to me in semester exam.This key question is from Point Source Radio Systems in portion Terrestrial Radio Navigation System of Avionics
Answer» RIGHT OPTION is (a) Cone of silence Explanation: The NDB works on an OMNIDIRECTIONAL antenna which has the radio PATTERN of a donut. The zone on the middle which is directly above the antenna is called as the cone of silence. In this region, no SIGNAL is transmitted.

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