Key Topic 23: Detectors - Video Amplifiers Flashcards
8-23C1: Which of the following statements is correct?
A. The video amplifier is located between the mixer and the IF amplifier.
B. The video amplifier operates between 60 MHz and 120 MHz.
C. The video amplifier is located between the IF amplifier and the display system.
D. The video amplifier is located between the local oscillator and the mixer.
C. The video amplifier is located between the IF amplifier and the display system.
8-23C2: Video amplifiers in pulse RADAR receivers must have a broad bandwidth because:
A. Weak pulses must be amplified.
B. High frequency sine waves must be amplified.
C. The RADARs operate at PRFs above 100.
D. The pulses produced are normally too wide for video amplification.
A. Weak pulses must be amplified.
8-23C3: In video amplifiers, compensation for the input and output stage capacitances must be accomplished to prevent distorting the video pulses. This compensation is normally accomplished by connecting:
A. Inductors in parallel with both the input and output capacitances.
B. Resistances in parallel with both the input and output capacitances.
C. An inductor in parallel with the input capacitance and an inductor in series with the output capcitance.
D. An inductor in series with the input capacitance and inductor in parallel with the output capacitance.
D. An inductor in series with the input capacitance and inductor in parallel with the output capacitance.
8-23C4: Which of the following signals is not usually an input to the video amplifier?
A. Resolver.
B. Range.
C. Brilliance.
D. Contrast.
A. Resolver.
8-23C5: Which of the following signals are usually an input to the video amplifier?
A. Range.
B. Brilliance.
C. Contrast.
D. All of the above.
D. All of the above.
8-23C6: The video (second) detector in a pulse modulated RADAR system would most likely use a/an:
A. Discriminator detector.
B. Diode detector.
C. Ratio detector.
D. Infinite impedance detector.
B. Diode detector.
