T4B-2010: Operating controls; tuning, use of filters, squelch, AGC, repeater offset, memory channels
What may happen if a transmitter is operated with the microphone gain set too high?
The output signal might become distorted
The output power might be too high
The frequency might vary
The SWR might increase
Which of the following can be used to enter the operating frequency on a modern transceiver?
The keypad or VFO knob
The CTCSS or DTMF encoder
The Automatic Frequency Control
All of these choices are correct
What is the purpose of the squelch control on a transceiver?
To mute receiver output noise when no signal is being received
To set the highest level of volume desired
To set the transmitter power level
To adjust the automatic gain control
What is a way to enable quick access to a favorite frequency on your transceiver?
Store the frequency in a memory channel
Enable the CTCSS tones
Disable the CTCSS tones
Use the scan mode to select the desired frequency
Which of the following would reduce ignition interference to a receiver?
Turn on the noise blanker
Change frequency slightly
Decrease the squelch setting
Use the RIT control
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
The AGC or limiter
The bandwidth selection
The tone squelch
What does the term "RIT" mean?
Receiver Incremental Tuning
Receiver Input Tone
Rectifier Inverter Test
Remote Input Transmitter
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
Permits monitoring several modes at once
Increases the number of frequencies that can be stored in memory
Increases the amount of offset between receive and transmit frequencies
Which of the following is an appropriate receive filter to select in order to minimize noise and interference for SSB reception?
Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
Which of the following describes the common meaning of the term repeater offset?
The difference between the repeater’s transmit and receive frequencies
The distance between the repeater’s transmit and receive antennas
The time delay before the repeater timer resets
The maximum frequency deviation permitted on the repeater’s input signal
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