Sub-Element T4 Amateur radio practices and station set-up [2 Exam Questions] Flashcards
What must be considered to determine the minimum current capacity needed for a transceiver power supply?
All of these choices are correct
How might a computer be used as part of an amateur radio station?
All of these choices are correct
Why should wiring between the power source and radio be heavy-gauge wire and kept as short as possible?
To avoid voltage falling below that needed for proper operation
Which computer sound card port is connected to a transceiver’s headphone or speaker output for operating digital modes?
Microphone or line input
What is the proper location for an external SWR meter?
In series with the feed line, between the transmitter and antenna
Which of the following connections might be used between a voice transceiver and a computer for digital operation?
Receive audio, transmit audio, and push-to-talk (PTT)
How is a computer’s sound card used when conducting digital communications?
The sound card provides audio to the radio’s microphone input and converts received audio to digital form
Which of the following conductors provides the lowest impedance to RF signals?
Flat strap
Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable?
Ferrite choke
What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?
The alternator
Where should the negative return connection of a mobile transceiver’s power cable be connected?
At the battery or engine block ground strap
What may happen if a transmitter is operated with the microphone gain set too high?
The output signal might become distorted
Which of the following can be used to enter the operating frequency on a modern transceiver?
The keypad or VFO knob
What is the purpose of the squelch control on a transceiver?
To mute receiver output noise when no signal is being received
What is a way to enable quick access to a favorite frequency on your transceiver?
Store the frequency in a memory channel
Which of the following would reduce ignition interference to a receiver?
Turn on the noise blanker
Which of the following controls could be used if the voice pitch of a single-sideband signal seems too high or low?
The receiver RIT or clarifier
What does the term “RIT” mean?
Receiver Incremental Tuning
What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
Permits noise or interference reduction by selecting a bandwidth matching the mode
Which of the following is an appropriate receive filter bandwidth for minimizing noise and interference for SSB reception?
2400 Hz
Which of the following is an appropriate receive filter bandwidth for minimizing noise and interference for CW reception?
500 Hz
What is the function of automatic gain control, or AGC?
To keep received audio relatively constant
Which of the following could be used to remove power line noise or ignition noise?
Noise blanker
Which of the following is a use for the scanning function of an FM transceiver?
To scan through a range of frequencies to check for activity
