1-47.
1-48.
1-49.
1-50.
1-51.
1-52.
To produce a video pulse of sufficient amplitude to
intensify the beam of a CRT, what voltage
amplification is required?
1. l/10th
2. 3/10th
3. 5/10th
4. 10/10th
After the echo signal enters the system through the
antenna, what is the next section it passes through?
1. Duplexer
2. Modulator
3. Amplifier
4. Cathode-ray tube
What is normally used to keep the receiver in tune
with the transmitter?
1.
2.
3.
4.
Difference frequency system
Backward-wave oscillator
Frequency synthesizer
Local oscillator
In receivers that use crystal mixers, the power
required to operate the local oscillator is
1. large
2. small
3. negative
4. positive
Reflex klystrons can also be used in RF power
amplifier klystrons as
1. pulse-forming networks
2. modulators
3. drivers
4. tuners
What system is taking the place of the STALO in
radar systems?
1.
2.
3.
4.
Local oscillator
Frequency synthesizer
Backward-wave oscillator
Automatic frequency control
1-53. What is the simplest type of radar mixer?
1. Magic T
2. Hybrid
3. Balanced
4. Unbalanced crystal
1-54,
1-55.
1-56.
1-57.
1-58.
What is the major disadvantage of the unbalanced
crystal mixer?
1. Inability to cancel LO noise
2. Inability to synthesize LO noise
3. Inability to produce LO noise
4. Inability to modulate LO noise
Which of the following factors is NOT determined
by the IF section of a radar receiver?
1. Signal-to-noise ratio
2. Effective bandwidth
3. Receiver gain
4. Pulsewidth
What is used to control the gain of a radar receiver
as a function of range?
1. MTI
2. STC
3. AGC
4. STALO
In what type of receivers are logarithmic IF
amplifiers used?
1. F M
2. AM
3. Heterodyne
4. Electronic attack
The detector in a basic radar receiver converts
which of the following signals into a video signal?
1. RF
2. IF
3. LO
4. MTI
5
