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Subel. T8
11 questions
Subelement T8

SIGNALS AND EMISSIONS

Section T8C

Operating activities: radio direction finding, contests, linking over the internet, exchanging grid locators

Which of the following methods is used to locate sources of noise interference or jamming?

  • Echolocation
  • Doppler radar
  • Correct Answer
    Radio direction finding
  • Phase locking
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Which of these items would be useful for a hidden transmitter hunt?

  • Calibrated SWR meter
  • Correct Answer
    A directional antenna
  • A directional wattmeter
  • All these choices are correct
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What operating activity involves contacting as many stations as possible during a specified period?

  • Simulated emergency exercises
  • Net operations
  • Hidden transmitter hunts
  • Correct Answer
    Contesting
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Which of the following is good practice when contacting another station in a contest?

  • Signing only the last two letters of your call if there are many other stations calling
  • Contacting the station twice to be sure that you are in his log
  • Correct Answer
    Sending only the minimum information needed for proper identification and the contest exchange
  • Adding “Please copy” before your exchange
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What is a grid locator?

  • Correct Answer
    A letter-number designator assigned to a geographic location
  • A letter-number designator assigned to an azimuth and elevation
  • An instrument for locating faults in power amplifiers
  • An instrument for radio direction finding
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How is over the air access to Internet Radio Linking Project (IRLP) nodes accomplished?

  • By obtaining a password that is sent via voice to the node
  • Correct Answer
    By using Dual-Tone Multi-Frequency (DTMF) signals
  • By entering the proper internet password
  • By using Continuous Tone-Coded Squelch System (CTCSS) tone codes
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What is Voice Over Internet Protocol (VoIP)?

  • A set of rules specifying how to identify your station when linked over the internet to another station
  • A technique employed to “spot” DX stations via the internet
  • A technique for measuring the modulation quality of a transmitter using remote sites monitored via the internet
  • Correct Answer
    A method of delivering voice communications over the internet using digital techniques
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What is the Internet Radio Linking Project (IRLP)?

  • Correct Answer
    A technique to connect amateur radio systems, such as repeaters, via the internet
  • A system for providing access to websites via amateur radio
  • A system for informing amateurs in real time of the frequency of active DX stations
  • A technique for measuring signal strength of an amateur transmitter via the internet
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Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?

  • IRLP
  • D-STAR
  • DMR
  • Correct Answer
    EchoLink
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What is required before using the EchoLink system?

  • Complete the required EchoLink training
  • Purchase a license to use the EchoLink software
  • Correct Answer
    Register your call sign and provide proof of license
  • At least a General Class license
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What is an amateur radio station that connects other amateur stations to the internet?

  • Correct Answer
    A gateway
  • A repeater
  • A digipeater
  • A beacon
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Go to T8B Go to T8D
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