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Subelement A
RADAR Principles
Section 9
Circuits-1
Blocking oscillators operate on the formula of:
  • Correct Answer
    T = R x C.
  • I = E/R.
  • By using the receiver's AGC.
  • None of the above are correct.
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The block diagram of a typical RADAR system microprocessor is shown in Fig. 8A2. Choose the most correct statement regarding this system.
  • The ALU is used for address decoding.
  • Correct Answer
    The Memory and I/O communicate with peripherals.
  • The control unit executes arithmetic manipulations.
  • The internal bus is used simultaneously by all units.
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The phantastron circuit is capable of:
  • Stabilizing the magnetron.
  • Preventing saturation of the RADAR receiver.
  • Being used to control repeller voltage in the AFC system.
  • Correct Answer
    Developing a linear ramp voltage when triggered by an external source.
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The block diagram of a typical RADAR system microprocessor is shown in Fig. 8A2. Choose the most correct statement regarding this system.
  • Correct Answer
    The ALU executes arithmetic manipulations.
  • The ALU is used for address decoding.
  • General registers are used for arithmetic manipulations.
  • Address pointers are contained in the control unit.
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In the Line-Driver/Coax/Line-receiver circuit shown in Fig. 8A3, what component is represented by the blank box marked "X"?
  • 25-ohm resistor.
  • Correct Answer
    51-ohm resistor.
  • 10-microhm inductor.
  • 20-microhm inductor.
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Choose the most correct statement:
  • The magnetron anode is a low voltage circuit.
  • The anode of the magnetron carries high voltage.
  • Correct Answer
    The filament of the magnetron carries dangerous voltages.
  • The magnetron filament is a low voltage circuit.
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