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Subel. G
6 questions
Subelement G

VHF-DSC Equipment & Comms:

Section 43

VHF: Controls, Volume, Squelch, DW & Scan:

Adjusting the volume control has the following results:

  • The higher the volume control is set the greater the sensitivity.
  • The volume control sets the threshold for receiving signals.
  • Correct Answer
    Adjusting the volume control has no effect on the sensitivity.
  • The lower the volume control is set the greater the sensitivity.
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The Dual Watch (DW) function is used to:

  • Listen to Ch-70 at the same time while monitoring Ch-16.
  • Sequentially monitor 4 different channels.
  • None of the above
  • Correct Answer
    Listening on any selected channel while periodically monitoring Ch-16.
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Setting the squelch control to just beyond the point where the background noise disappears results in:

  • Correct Answer
    Maximum sensitivity without background noise.
  • Reduced sensitivity without background noise.
  • Minimum background noise with reduced sensitivity.
  • Greater bandwidth without background noise.
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The "Scan" function is used to:

  • Monitor Ch-16 continuously and switching to either Ch-70 or Ch-13 every 5 seconds.
  • Correct Answer
    Sequentially scan all or selected channels.
  • Scan Ch-70 for Distress alerts.
  • None of the above.
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Setting the squelch control to the end of its range without any noise being heard results in:

  • Less background noise
  • Correct Answer
    Minimum sensitivity
  • Maximum sensitivity
  • Does not have any effect on the sensitivity.
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Proper and legal VHF operations require all of these except?

  • The channel must be designated as valid for the nature or type of communications desired.
  • Simplex, duplex and alpha channel modes must be correctly selected.
  • Correct Answer
    The correct bandwidth must be selected by the operator.
  • The power level must be appropriately chosen by the operator.
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