The T4 section of the Technician test contains information on amateur radio practices and station setup.


The T4A section covers station setup; microphone, speaker, headphones, filters, power source, connecting a computer, RF grounding.
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Which of the following is true concerning the microphone connectors on amateur transceivers?
Some connectors include push-to-talk and voltages for powering the microphone


What could be used in place of a regular speaker to help you copy signals in a noisy area?
A set of headphones


Which is a good reason to use a regulated power supply for communications equipment?
It prevents voltage fluctuations from reaching sensitive circuits


Where must a filter be installed to reduce harmonic emissions?
Between the transmitter and the antenna


What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from a nearby 2 meter transmitter?
Band-reject filter


Which of the following would be connected between a transceiver and computer in a packet radio station?
Terminal node controller


How is the computer’s sound card used when conducting digital communications using a computer?
The sound card provides audio to the microphone input and converts received audio to digital form


Which type of conductor is best to use for RF grounding?
Flat strap


Which would you use to reduce RF current flowing on the shield of an audio 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 a mobile transceiver’s power negative connection be made?
At the battery or engine block ground strap


The T4B section covers operating controls; tuning, use of filters, squelch, AGC, repeater offset, memory channels.
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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 to select in order to minimize noise and interference for SSB reception?
2400 Hz


Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
500 Hz


Which of the following describes the common meaning of the term “repeater offset”?
The difference between the repeater’s transmit and receive frequencies