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G8A09 - What type of modulation is used by FT8?
|
|
0
|
9
|
December 15, 2025
|
|
G8B06 - What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?
|
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0
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5
|
December 15, 2025
|
|
G8A14 - What is link margin?
|
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0
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15
|
December 15, 2025
|
|
G8A08 - Which of the following is an effect of overmodulation?
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0
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5
|
December 15, 2025
|
|
G8C01 - On what band do amateurs share channels with the unlicensed Wi-Fi service?
|
|
0
|
11
|
December 15, 2025
|
|
G8B13 - Which of the following is an odd-order intermodulation product of frequencies F1 and F2?
|
|
0
|
14
|
December 15, 2025
|
|
G8B12 - What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?
|
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0
|
9
|
December 15, 2025
|
|
G8B11 - What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?
|
|
0
|
9
|
December 15, 2025
|
|
G8B10 - What is the relationship between transmitted symbol rate and bandwidth?
|
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0
|
11
|
December 15, 2025
|
|
G8B08 - Why is it important to know the duty cycle of the mode you are using when transmitting?
|
|
0
|
6
|
December 15, 2025
|
|
G8B02 - What is the term for interference from a signal at twice the IF frequency from the desired signal?
|
|
0
|
9
|
December 15, 2025
|
|
G8A10 - What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?
|
|
0
|
6
|
December 15, 2025
|
|
G8B07 - What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?
|
|
0
|
8
|
December 15, 2025
|
|
G8B01 - Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?
|
|
0
|
8
|
December 15, 2025
|
|
G8B05 - Which intermodulation products are closest to the original signal frequencies?
|
|
0
|
5
|
December 15, 2025
|
|
G8A13 - What is a link budget?
|
|
0
|
7
|
December 15, 2025
|
|
G8A07 - Which of the following phone emissions uses the narrowest bandwidth?
|
|
0
|
1
|
December 15, 2025
|
|
G8B09 - Why is it good to match receiver bandwidth to the bandwidth of the operating mode?
|
|
0
|
10
|
December 15, 2025
|
|
G8B04 - What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?
|
|
0
|
3
|
December 15, 2025
|
|
G8B03 - What is another term for the mixing of two RF signals?
|
|
0
|
8
|
December 15, 2025
|
|
G8A12 - What is QPSK modulation?
|
|
0
|
10
|
December 15, 2025
|
|
G8A11 - What is the modulation envelope of an AM signal?
|
|
0
|
3
|
December 15, 2025
|
|
G8A06 - Which of the following is characteristic of QPSK31?
|
|
0
|
7
|
December 15, 2025
|
|
G8A05 - What type of modulation varies the instantaneous power level of the RF signal?
|
|
0
|
7
|
December 15, 2025
|
|
G8A04 - What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?
|
|
0
|
8
|
December 15, 2025
|
|
G8A03 - What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?
|
|
0
|
15
|
December 15, 2025
|
|
G8A02 - What is the name of the process that changes the phase angle of an RF signal to convey information?
|
|
0
|
5
|
December 15, 2025
|
|
G8A01 - How is direct binary FSK modulation generated?
|
|
0
|
9
|
December 15, 2025
|
|
G7C13 - What term specifies a filter’s maximum ability to reject signals outside its passband?
|
|
0
|
5
|
December 15, 2025
|
|
G7C07 - What term specifies a filter’s attenuation inside its passband?
|
|
0
|
13
|
December 15, 2025
|