Microwave Communication What is the purpose of the electromagnetic field which surrounds a traveling-wave tube? To accelerate the electron To velocity modulate the electron beam To slow down the signal on the helix To keep the electrons from spreading out To accelerate the electron To velocity modulate the electron beam To slow down the signal on the helix To keep the electrons from spreading out ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication In a pulsed radar set, the STC circuit is used to Reduce interference from the effects of sea return Improve the target bearing resolution Increases receiver sensitivity for echoes from targets 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 Vary the pulse frequency in order to control the maximum target ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication The maximum usable range of the usual radar set (on any particular range setting) is determined by The duty cycle The bandwidth of the receiver IF stages The width of the transmitted pulses The interval between transmitted pulses The duty cycle The bandwidth of the receiver IF stages The width of the transmitted pulses The interval between transmitted pulses ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication It is possible to increase the maximum range of a radar equipment by All of these Lowering the pulse frequency Raising the peak power of the transmitter Narrowing the beam width and increasing the pulse duration All of these Lowering the pulse frequency Raising the peak power of the transmitter Narrowing the beam width and increasing the pulse duration ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication When it is desired that short-range targets be clearly seen on a pulsed-radar set, it is important that the receiver and display system have Low-pass filters The restricted high-frequency response A long time constant The shortest possible time Low-pass filters The restricted high-frequency response A long time constant The shortest possible time ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is 10,000 watts 1,000 watts 1,000,000 watts 100 watts 10,000 watts 1,000 watts 1,000,000 watts 100 watts ANSWER DOWNLOAD EXAMIANS APP
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