单项选择题
A.persistence B.pulse repetition rate C.pulse length D.rotation rate
The number of pulses of energy transmitted per second i...
单项选择题The number of pulses of energy transmitted per second is call the（）.
A.carrier frequency B.pulse repetition rate C.pulse length D.pulse repetition time
The radar component that generates the radio-frequency ...
单项选择题The radar component that generates the radio-frequency energy in the form of short powerful pulses is which of the following?（）.
A.magnetron B.receiver C.indicator D.modulator
The radar component that produces the synchronizing sig...
单项选择题The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
A.transmitter B.antenna system C.indicator D.modulator
