Microwave Communication
Oscillators of a klystron tube are maintained

By plate-to-cathode feedback
By feedback between the accelerating grid and the repeller
By circulating bunches of electrons within the cavities.
By bunches of electrons passing the cavity grids

ANSWER DOWNLOAD EXAMIANS APP

Microwave Communication
In a pulsed radar set, the STC circuit is used to

Vary the pulse frequency in order to control the maximum target
Reduce interference from the effects of sea return
Improve the target bearing resolution
Increases receiver sensitivity for echoes from targets

ANSWER DOWNLOAD EXAMIANS APP