Correct Answer : Option (B) : duplex arrangement
Explanation : Separate frequencies for transmission from base and portable units allows two way transmission and is called duplex arrangement.
Correct Answer : left to right
Correct Answer : Fading
Explanation : Tropospheric scatter propagation is subject to two types of fading called Rayleigh fading (due to multipath propagation) and fading due to variations in atmospheric conditions along the propagation path.
Correct Answer : 13 mm