T8A-2010: Modulation modes; bandwidth of various signals
T8A01:
Which of the following is a form of amplitude modulation?
Single sideband
Spread-spectrum
Packet radio
Phase shift keying
T8A02:
What type of modulation is most commonly used for VHF packet radio transmissions?
FM
SSB
AM
Spread Spectrum
T8A03:
Which type of voice modulation is most often used for long-distance or weak signal contacts on the VHF and UHF bands?
SSB
FM
AM
PM
T8A04:
Which type of modulation is most commonly used for VHF and UHF voice repeaters?
FM
AM
SSB
PSK
T8A05:
Which of the following types of emission has the narrowest bandwidth?
CW
FM voice
SSB voice
Slow-scan TV
T8A06:
Which sideband is normally used for 10 meter HF, VHF and UHF single-sideband communications?
Upper sideband
Lower sideband
Suppressed sideband
Inverted sideband
T8A07:
What is the primary advantage of single sideband over FM for voice transmissions?
SSB signals have narrower bandwidth
SSB signals are easier to tune
SSB signals are less susceptible to interference
All of these choices are correct
T8A08:
What is the approximate bandwidth of a single sideband voice signal?
3 kHz
1 kHz
6 kHz
15 kHz
T8A09:
What is the approximate bandwidth of a VHF repeater FM phone signal?
Between 5 and 15 kHz
Less than 500 Hz
About 150 kHz
Between 50 and 125 kHz
T8A10:
What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band?
About 6 MHz
More than 10 MHz
About 3 MHz
About 1 MHz
T8A11:
What is the approximate maximum bandwidth required to transmit a CW signal?
150 Hz
2.4 kHz
1000 Hz
15 kHz
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