FCCライセンス 5月 20 2024 SUBELEMENT T4A – AMATEUR RADIO PRACTICES T4A – Station setup: connecting a microphone, a power source, a computer, digital equipment, an SWR meter; bonding; Mobile radio installation SUBELEMENT T4A – AMATEUR RADIO PRACTICES T4A – Station setup: connecting a microphone, a power source, a computer, digital equipment, an SWR meter; bonding; Mobile radio installation 1 / 12 T4A01Which of the following is an appropriate power supply rating for a typical 50 watt output mobile FM transceiver? 24.0 volts at 4 amperes 13.8 volts at 4 amperes 24.0 volts at 12 amperes 13.8 volts at 12 amperes 2 / 12 T4A02Which of the following should be considered when selecting an accessory SWR meter? The frequency and power level at which the measurements will be made The distance that the meter will be located from the antenna The types of modulation being used at the station All these choices are correct 3 / 12 T4A03Why are short, heavy-gauge wires used for a transceiver’s DC power connection? To minimize voltage drop when transmitting To provide a good counterpoise for the antenna To avoid RF interference All these choices are correct 4 / 12 T4A04How are the transceiver audio input and output connected in a station configured to operate using FT8? To a computer running a terminal program and connected to a terminal node controller unit To the audio input and output of a computer running WSJT-X software To an FT8 conversion unit, a keyboard, and a computer monitor To a computer connected to the FT8converter.com website 5 / 12 T4A05Where should an RF power meter be installed? In the feed line, between the transmitter and antenna At the power supply output In parallel with the push-to-talk line and the antenna In the power supply cable, as close as possible to the radio 6 / 12 T4A06What signals are used in a computer-radio interface for digital mode operation? Receive and transmit mode, status, and location Antenna and RF power Receive audio, transmit audio, and transmitter keying NMEA GPS location and DC power 7 / 12 T4A07Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes? Computer “line out” to transceiver push-to-talk Computer “line in” to transceiver push-to-talk Computer “line in” to transceiver speaker connector Computer “line out” to transceiver speaker connector 8 / 12 T4A08Which of the following conductors is preferred for bonding at RF? Copper braid removed from coaxial cable Steel wire Twisted-pair cable Flat copper strap 9 / 12 T4A09How can you determine the length of time that equipment can be powered from a battery? Divide the watt-hour rating of the battery by the peak power consumption of the equipment Divide the battery ampere-hour rating by the average current draw of the equipment Multiply the watts per hour consumed by the equipment by the battery power rating Multiply the square of the current rating of the battery by the input resistance of the equipment 10 / 12 T4A10What function is performed with a transceiver and a digital mode hot spot? Communication using digital voice or data systems via the internet FT8 digital communications via AFSK RTTY encoding and decoding without a computer High-speed digital communications for meteor scatter 11 / 12 T4A11Where should the negative power return of a mobile transceiver be connected in a vehicle? At the 12 volt battery chassis ground At the antenna mount To any metal part of the vehicle Through the transceiver’s mounting bracket 12 / 12 T4A12What is an electronic keyer? A device for switching antennas from transmit to receive A device for voice activated switching from receive to transmit A device that assists in manual sending of Morse code An interlock to prevent unauthorized use of a radio Your score isThe average score is 83% 0% Restart quiz Ed 0 コメント
