Which of the following is an appropriate power supply rating for a typical 50-watt output mobile FM transceiver?
D13.8 volts at 12 amperes
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Subelement T4 question review
All 23 official questions with the exact winning phrase marked.
Which of the following should be considered when selecting an accessory SWR meter?
AThe frequency and power level at which the measurements will be made
Why are short, heavy-gauge wires used for a transceiver’s DC power connection?
ATo minimize voltage drop when transmitting
How are the audio input and output of a transceiver connected in a station configured to operate using FT8?
BTo the audio output and input of a computer running FT8 software
Where should an RF power meter be installed?
AIn the feed line, between the transmitter and antenna
What signals are used in a computer-radio interface for digital mode operation?
CReceive audio, transmit audio, and transmitter keying
Which of the following is one of the connections required between a computer and a transceiver to operate digital modes?
CComputer “line in” to transceiver speaker connector
Which of the following conductors is preferred for bonding at RF?
DFlat copper strap
How can you determine the length of time that equipment can be powered from a battery?
BDivide the battery ampere-hour rating by the average current draw of the equipment
What function does a digital mode hotspot perform for nearby transceivers?
ACommunication with a digital voice or data network
Where should the negative power return of a mobile transceiver be connected in a vehicle?
AAt the 12-volt battery chassis ground
What is an electronic keyer?
CA device that assists in manual sending of Morse code
What is the effect of excessive microphone gain on SSB transmissions?
BDistorted transmitted audio
Which of the following can be used to enter a transceiver’s operating frequency?
AThe keypad or VFO knob
How is squelch adjusted so that a weak FM signal can be heard?
ASet the squelch threshold so that receiver output audio is on all the time
What does an FM signal sound like when received slightly off frequency?
DThe audio becomes distorted
What does the scanning function of an FM transceiver do?
CTunes through a range of frequencies to check for activity
Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low?
DThe RIT or Clarifier
What is a DMR “code plug”?
BConfiguration data loaded onto your radio to access repeaters and talkgroups
What is the advantage of having a choice of receiver filter bandwidths in a multimode transceiver?
BPermits noise or interference reduction by selecting a bandwidth matching the mode
How is a specific group of stations selected on a DMR digital voice transceiver?
CBy entering the group’s identification code
Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?
C2400 Hz
Which of the following must be programmed into a D-STAR digital transceiver before transmitting?
AYour call sign