5
1-39. In a monopulse scanning system, which
of the following feedhorn signal
combinations makes up the bearing
signal?
1. (A + D) - (A + C)
2. (A + B) - (C + D)
3. (A + C) - (B + D)
4. A + B + C + D
1-40. In a monopulse scanning system, which
of the following combinations make up
the range signal?
1. (A + D) - (A + C)
2. (A + B) - (C + D)
3. (A + C) - (B + D)
4. A + B + C + D
1-41. Monopulse receivers use what signal as a
phase reference?
1. Range
2. Traverse
3. Elevation
4. Angle-tracking
1-42. In the cw radar transmission method, the
Doppler effect provides which of the
following target information?
1. Speed of the target
2. Presence of the target
3. Both 1 and 2 above
4. Relative bearing of the target
1-43. The frequency of the returned signal
increases when a target is approaching
and decreases when a target is moving
away in which of the following types of
radar systems?
1. Search
2. Doppler
3. Pulse-modulation
4. Frequency-modulation
1-44. Continuous-wave radar that uses the
Doppler effect is best used in detecting
which of the following types of targets?
1. Stationary
2. Past-moving
3. Targets with a high degree of range
resolution
4. Targets with a high degree of bearing
resolution
1-45. Range information can be obtained in a
Doppler radar by which of the following
methods?
1. Sweeping the transmitter frequency
2. Using two separate transmitters
3. Both 1 and 2 above
4. Using two separate antennas
1-46. Frequency-modulated radars transmit a
wave that continuously changes in
frequency about a center frequency.
Using frequency modulation, the range to
a target is determined by using which of
the following methods?
1. By comparing the frequency of the
transmitted signal with the returned
frequency from the target
2. By comparing the magnitude of
transmitted pulses with the
magnitude of returned pulses
3. By comparing the velocity of the
received energy with the velocity of
the transmitted energy
4. By measuring the Doppler shift that
occurs in the returning signal
