T8A-2014: Modulation modes: bandwidth of various signals; choice of emission type
Which of the following is a form of amplitude modulation?
Phase shift keying
What type of modulation is most commonly used for VHF packet radio transmissions?
Which type of voice mode is most often used for long-distance (weak signal) contacts on the VHF and UHF bands?
Which type of modulation is most commonly used for VHF and UHF voice repeaters?
Which of the following types of emission has the narrowest bandwidth?
Which sideband is normally used for 10 meter HF, VHF and UHF single-sideband communications?
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
What is the approximate bandwidth of a single sideband voice signal?
What is the approximate bandwidth of a VHF repeater FM phone signal?
Between 10 and 15 kHz
Less than 500 Hz
About 150 kHz
Between 50 and 125 kHz
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
What is the approximate maximum bandwidth required to transmit a CW signal?
● = Unseen
● = Weak
● = Review
● = Learned
● = Incorrect answer