Which of the following can be measured with an antenna analyzer?
Front-to-back ratio of an antenna
Power output from a transmitter
Impedance of coaxial cable✓Правильный ответ
Gain of a directional antenna
Объяснение
An antenna analyzer measures complex impedance at its terminals, and by observing the impedance of a length of coaxial cable terminated in an open or short it determines the cable's characteristic impedance. It has no transmitter power to measure and no way to observe an antenna's radiation pattern, so gain and front-to-back ratio are out of reach.