Technician › T4
T4 Amateur Radio Practices
23 questions in the pool. Your exam will include 2, one from each group below.
T4A
Station setup: connecting a microphone, RF power meter, a power source, a computer, digital equipment, an SWR meter; RF grounding; Mobile radio installation
- T4A01Which of the following is an appropriate power supply rating for a typical 50-watt output mobile FM transceiver?
- T4A02Which of the following should be considered when selecting an accessory SWR meter?
- T4A03Why are short, heavy-gauge wires used for a transceiver's DC power connection?
- T4A04How are the audio input and output of a transceiver connected in a station configured to operate using FT8?
- T4A05Where should an RF power meter be installed?
- T4A06What signals are used in a computer-radio interface for digital mode operation?
- T4A07Which of the following is one of the connections required between a computer and a transceiver to operate digital modes?
- T4A08Which of the following conductors is preferred for bonding at RF?
- T4A09How can you determine the length of time that equipment can be powered from a battery?
- T4A10What function does a digital mode hotspot perform for nearby transceivers?
- T4A11Where should the negative power return of a mobile transceiver be connected in a vehicle?
- T4A12What is an electronic keyer?
T4B
Operating controls: frequency tuning, use of filters, squelch function, AGC, memory channels, noise blanker, microphone gain, receiver incremental tuning (RIT), bandwidth selection, scanning function; Digital transceiver configuration; DMR code plugs and talk groups
- T4B01What is the effect of excessive microphone gain on SSB transmissions?
- T4B02Which of the following can be used to enter a transceiver's operating frequency?
- T4B03How is squelch adjusted so that a weak FM signal can be heard?
- T4B04What does an FM signal sound like when received slightly off frequency?
- T4B05What does the scanning function of an FM transceiver do?
- T4B06Which 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?
- T4B07What is a DMR “code plug”?
- T4B08What is the advantage of having a choice of receiver filter bandwidths in a multimode transceiver?
- T4B09How is a specific group of stations selected on a DMR digital voice transceiver?
- T4B10Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?
- T4B11Which of the following must be programmed into a D-STAR digital transceiver before transmitting?