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Subel. T2
14 questions
Subelement T2

OPERATING PROCEDURES

Section T2B

VHF/UHF operating practices: FM repeater, simplex, reverse splits; Access tones: CTCSS, DTMF; DMR operation; Resolving operating problems; Q signals

What is the purpose of the reverse function on a VHF/UHF transceiver?

  • To reduce power output
  • To increase power output
  • Correct Answer
    To listen on a repeater’s input frequency
  • To listen on a repeater’s output frequency
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What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver?

  • Carrier squelch
  • Tone burst
  • DTMF
  • Correct Answer
    CTCSS
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Which of the following describes a linked repeater network?

  • Correct Answer
    A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network
  • A single repeater with more than one receiver
  • Multiple repeaters with the same control operator
  • A system of repeaters linked by APRS
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Which of the following could be the reason you are unable to access a repeater whose output you can hear?

  • Improper transceiver offset
  • You are using the wrong CTCSS tone
  • You are using the wrong DCS code
  • Correct Answer
    All these choices are correct
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Which of the following would cause your FM transmission audio to drop out on voice peaks?

  • Your repeater offset is inverted
  • Your FM deviation is too low
  • Correct Answer
    You are talking too loudly
  • Your transmit power is too high
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What type of signaling to a repeater uses two simultaneous audio tones?

  • Correct Answer
    DTMF
  • CTCSS
  • GMRS
  • D-STAR
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How can you join a digital repeater’s “talkgroup”?

  • Register with the local Frequency Coordinator
  • Register with the digital repeater control operator
  • Correct Answer
    Program your radio with the group’s ID or code
  • Program your radio with the DTMF tone used by the talkgroup
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Which of the following applies when two stations transmitting on the same frequency interfere with each other?

  • Correct Answer
    The stations should negotiate continued use of the frequency
  • Both stations should choose another frequency to avoid conflict
  • Whichever station was on the frequency first has preemptive rights to the frequency
  • Use subaudible tones so both stations can share the frequency
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Why are simplex channels designated in the VHF/UHF band plans?

  • Correct Answer
    So stations within range of each other can communicate without tying up a repeater
  • For contest operation
  • For working DX only
  • So stations with simple transmitters can access the repeater without automated offset
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Which Q signal indicates that you are receiving interference from other stations?

  • Correct Answer
    QRM
  • QRN
  • QTH
  • QSB
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Which Q signal indicates that you are changing frequency?

  • QRU
  • Correct Answer
    QSY
  • QSL
  • QRZ
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What is the digital color code used on DMR repeater systems?

  • Correct Answer
    An access code which must be programmed into a DMR transmitter to access a specific repeater
  • A code which automatically programs the repeater offset to a frequency chosen by the user
  • A code which identifies the specific CODEC being used so that the repeater can properly decode the audio
  • A code transmitted by the repeater to indicate health and status of the equipment
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What is the purpose of a squelch function?

  • Reduce a CW transmitter's key clicks
  • Correct Answer
    Mute the receiver audio when a signal is not present
  • Eliminate parasitic oscillations in an RF amplifier
  • Reduce interference from impulse noise
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Which of the following is a “talkgroup”?

  • A group of amateur radio operators who share email on a specific amateur radio topic
  • Correct Answer
    An identifier used by DMR to organize radio traffic so that those who want to hear the group aren’t bothered by other radio traffic
  • The members of a net organized for amateur radio operators with a specific common interest
  • A method of automatically alerting all group members to the frequency where any member is transmitting
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