T4A-2010: Station setup; microphone, speaker, headphones, filters, power source, connecting a computer, RF grounding
T4A01:
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
All transceivers use the same microphone connector type
All transceivers using the same connector type are wired identically
Un-keyed connectors allow any microphone to be connected
T4A02:
What could be used in place of a regular speaker to help you copy signals in a noisy area?
A set of headphones
A video display
A low pass filter
A boom microphone
T4A03:
Which is a good reason to use a regulated power supply for communications equipment?
It prevents voltage fluctuations from reaching sensitive circuits
A regulated power supply has FCC approval
A fuse or circuit breaker regulates the power
Power consumption is independent of load
T4A04:
Where must a filter be installed to reduce harmonic emissions?
Between the transmitter and the antenna
Between the receiver and the transmitter
At the station power supply
At the microphone
T4A05:
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
Low-pass filter
High-pass filter
Band-pass filter
T4A06:
Which of the following would be connected between a transceiver and computer in a packet radio station?
Terminal node controller
Transmatch
Mixer
Antenna
T4A07:
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
The sound card communicates between the computer CPU and the video display
The sound card records the audio frequency for video display
All of these choices are correct
T4A08:
Which type of conductor is best to use for RF grounding?
Flat strap
Round stranded wire
Round copper-clad steel wire
Twisted-pair cable
T4A09:
Which would you use to reduce RF current flowing on the shield of an audio cable?
Ferrite choke
Band-pass filter
Low-pass filter
Preamplifier
T4A10:
What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?
The alternator
The ignition system
The electric fuel pump
Anti-lock braking system controllers
T4A11:
Where should a mobile transceiver’s power negative connection be made?
At the battery or engine block ground strap
At the antenna mount
To any metal part of the vehicle
Through the transceiver’s mounting bracket
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● = Review
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● = Incorrect answer
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