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 Which of the following operating frequencies is used for the modern loran navigational system? Loran D: 10.2 kHz Loran B: 900 kHz Loran C: 100 kHz Loran A: 1950 kHz Loran D: 10.2 kHz Loran B: 900 kHz Loran C: 100 kHz Loran A: 1950 kHz ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication A traveling-wave tube (TWT) amplifies by virtue of The effect of an external magnetic field The absorption of energy by the signal from an electron stream The energy liberated form the collector The energy contained the cavity resonators The effect of an external magnetic field The absorption of energy by the signal from an electron stream The energy liberated form the collector The energy contained the cavity resonators ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication __________ is the progressive decrease of signal strength with increasing distance. Propagation Radiation Modulation Attenuation Propagation Radiation Modulation Attenuation ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication In a pulsed radar set, the function of the duplexer is to Aid in calibrating the display unit Allow the transmitter and the receiver to operate from a common antenna Prevent frequency drift in the klystron All of these Aid in calibrating the display unit Allow the transmitter and the receiver to operate from a common antenna Prevent frequency drift in the klystron All of these ANSWER DOWNLOAD EXAMIANS APP
Microwave Communication The maximum usable range of the usual radar set (on any particular range setting) is determined by The width of the transmitted pulses The duty cycle The interval between transmitted pulses The bandwidth of the receiver IF stages The width of the transmitted pulses The duty cycle The interval between transmitted pulses The bandwidth of the receiver IF stages ANSWER DOWNLOAD EXAMIANS APP
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