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Subel. G
6 questions
Subelement G
Inspections, Installations and Instruments:
Section 50
Test Equipment-2:
What type of signals are usually provided by a simple Function Generator?
  • Sine Waves with pulse modulation.
  • Sine Waves and Square Waves.
  • Square Waves and Triangular Waves.
  • Correct Answer
    Sine Waves, Square Waves and Triangular Waves.
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a SINAD meter consists of a multi-range audio frequency voltmeter:
  • Correct Answer
    Calibrated in decibels with a sharp internal 1000 Hz bandstop filter.
  • Calibrated in millivolts with a medium 1000 Hz bandpass filter.
  • Calibrated in decibels with an internal 1000 Hz highpass filter.
  • Calibrated in decibels with an internal 1000 Hz lowpass filter.

For more information, see What is sinad signal to noise and distortion

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Which of the following statements about a logic probe is false?
  • A "Red" LED indicates a "High" state.
  • Correct Answer
    Both "Red" and "Green" LEDs on indicate a short.
  • A "Green" LED indicates a "Low" state.
  • An "Amber" LED indicates a "pulse".
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An analog RF wattmeter provides the most accurate reading:
  • At the middle one third of the dial.
  • At the lower one third of the dial.
  • Correct Answer
    At the upper one third of the dial.
  • The accuracy is uniform the whole scale.
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What is the purpose of a deviation meter?
  • Measure the number of sidebands.
  • Measure the modulation index.
  • Correct Answer
    Measure the carrier deviation in an FM transmitter.
  • Measure the carrier frequency.
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What would be the most likely reason to observe the transmitter output with a spectrum analyzer?
  • Measure frequency modulation deviation.
  • Measure percentage of amplitude modulation.
  • Measure the carrier frequency.
  • Correct Answer
    Measure spurious signals.
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