T4_Amateur_Radio_Practices

Which 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

Which 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

Why 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

How 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

Where 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

What 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

Which 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

Which of the following conductors is preferred for bonding at RF?

• Copper braid removed from coaxial cable
• Steel wire
• Twisted-pair cable
• Flat copper strap

How 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

What 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