Related Questions

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
A A long time constant
B Low-pass filters
C The shortest possible time
D The restricted high-frequency response
In a pulsed radar set, the STC circuit is used to
A Improve the target bearing resolution
B Increases receiver sensitivity for echoes from targets
C Vary the pulse frequency in order to control the maximum target
D Reduce interference from the effects of sea return
In an SHF pulsed radar set, a reflex klystron can be used as a
A Single mixer stage
B Local oscillator
C Transmitter oscillator
D Duplexer stage
To achieve good bearing resolution when using a pulsed-radar set, an important requirement is
A A narrow, antenna-beam width in the vertical plane
B A narrow, antenna-beam width in the horizontal plane
C A low repetition rate
D A high duty cycle
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 A decrease in range
B A reduction in horizontal resolution
C No noticeable effect
D A decrease in gain
What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?
A Isolator
B Magnetron
C Simplex
D Circulator
Of 30 integers, 12 are in set A , 22 are in set A , 22 are in set B , and 7 are in both set A and B. How many of the integers in NITTHER set A nor set B?
A 4
B 1
C 3
A PPI cathode-ray tube as used on a radar set
A Is used to check the percentage of modulation
B Indicates both the range and azimuth of a target
C Indicates only the range of a target
D Is used for receiver alignment
When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target.
A Which may be used to tune the radar synchronizer
B Which may be used to tune the radar receiver
C To the tone of the pulse repetition
D Tune the magnetron to the correct frequency
The maximum usable range of the usual radar set (on any particular range setting) is determined by
A The width of the transmitted pulses
B The interval between transmitted pulses
C The bandwidth of the receiver IF stages
D The duty cycle

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