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Subel. B
6 questions
Subelement B

MF-HF-DSC-SITOR (NBDP) Equip. & Ops:

Section 12

Controls, Functions and Displays:

What is the purpose of the "R.I.T." control on a MF/HF transceiver?

  • Make slight adjustments to the transmit frequency.
  • Correct Answer
    Make slight adjustments in the receiver frequency.
  • Select the proper transmitter emissions.
  • Select the proper paired duplex channel.
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What is the function of the "TUNE" button on a MF/HF transceiver?

  • To tune in a new ITU channel.
  • To tune the frequency of the receiver.
  • Correct Answer
    To tune the antenna to the transmit frequency.
  • To tune the frequency of the AF amplifier.
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What is the purpose of the "ENTER" function.

  • To store any incoming DSC message in memory.
  • To recall any previously received message.
  • To transmit a DSC distress alert.
  • Correct Answer
    To accept the previous selection or data input.
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What mode is a MF/HF transceiver operating in when "TLX" displayed?

  • Correct Answer
    SITOR (NBDP)
  • SSB
  • DSC
  • AM
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Reducing the "RF Gain" control on an MF/HF transceiver has what effect?

  • Reduces degenerative feedback to the RF amplifier stage.
  • Reduces volume in response to a varying RF signal input.
  • Reduces coupling between the receiver's RF amplifier stages.
  • Correct Answer
    Reduces sensitivity of the RF amplifier stage.
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What is the function of an "AGC" button?

  • Correct Answer
    To maintain a relatively constant AF output when the input signal varies.
  • To reduce AF output when the input signal becomes weak.
  • To increase the gain of the RF amplifier when the input signal is strong.
  • To increase RF output when the input signal becomes strong.
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