Microwave Communication What is the purpose of the electromagnetic field which surrounds a traveling-wave tube? To slow down the signal on the helix To keep the electrons from spreading out To velocity modulate the electron beam To accelerate the electron To slow down the signal on the helix To keep the electrons from spreading out To velocity modulate the electron beam To accelerate the electron 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 shortest possible time The restricted high-frequency response A long time constant Low-pass filters The shortest possible time The restricted high-frequency response A long time constant ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the Distributed lead inductance Inter-electrode capacitance Electron transit time Degree of emission from the cathode Distributed lead inductance Inter-electrode capacitance Electron transit time Degree of emission from the cathode ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target. To the tone of the pulse repetition Which may be used to tune the radar receiver Which may be used to tune the radar synchronizer Tune the magnetron to the correct frequency To the tone of the pulse repetition Which may be used to tune the radar receiver Which may be used to tune the radar synchronizer Tune the magnetron to the correct frequency ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication A thin layer of dirt and grime coverts the reflecting surface of the parabolic dish of a radar set. The particular effect on the performance of the radar will be A decrease in gain No noticeable effect A decrease in range A reduction in horizontal resolution A decrease in gain No noticeable effect A decrease in range A reduction in horizontal resolution ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication The cavity resonator Produces a frequency which is independent of the cavity size. Has a low Q factor for narrow operation. Is equivalent to an LC resonant circuit In a reflect klystron has its output taken from the reflector plate Produces a frequency which is independent of the cavity size. Has a low Q factor for narrow operation. Is equivalent to an LC resonant circuit In a reflect klystron has its output taken from the reflector plate ANSWER DOWNLOAD EXAMIANS APP
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