3-N-086: MF-HF, SSB-SITOR
3-86N1:
What is a common occurrence when voice-testing an SSB aboard a boat?
Voltage panel indicator lamps may glow with each syllable.
Ammeter fluctuates down with each spoken word.
Automatic tuner cycles on each syllable.
Minimal voltage drop seen at power source.
3-86N2:
What might contribute to apparent low voltage on marine SSB transmitting?
Blown black negative fuse.
Blown red fuse.
Too much grounding.
Antenna mismatch.
3-86N3:
What type of wire connects an SSB automatic tuner to an insulated backstay?
GTO-15 high-voltage cable.
RG8U.
RG213.
16-gauge two-conductor.
3-86N4:
Which of the following statements concerning SITOR communications is true?
ARQ message transmissions are made in data groups consisting of three-character blocks.
ARQ transmissions are acknowledged by the Information Receiving Station only at the end of the message.
ARQ communications rely upon error correction by time diversity transmission and reception.
Forward error correction is an interactive mode.
3-86N5:
The sequence ARQ, FEC, SFEC best corresponds to which of the following sequences?
Two way communications, one-way communications to all stations, one-way communications to a single station.
One-way communications to a single station, one-way communications to all stations, two-way communications.
One-way communications to all stations, two-way communications, one-way communications to a single station.
Two way communications, one-way communications to a single station, one-way communications to all stations.
3-86N6:
Which of the following statements concerning SITOR communications is true?
Two-way communication with the coast radio station using FEC is not necessary to be able to receive the broadcasts.
Communication is established on the working channel and answerbacks are exchanged before FEC broadcasts can be received.
In the ARQ mode each character is transmitted twice.
Weather broadcasts cannot be made in FEC because sending each character twice would cause the broadcast to be prohibitively long.
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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