T8_Signals_&_Emissions_part_1

Which of the following is a form of amplitude modulation?

• Spread spectrum
• Packet radio
• Single sideband
• . Phase shift keying (PSK)

What type of modulation is commonly used for VHF packet radio transmissions?

• FM or PM
• SSB
• AM
• PSK

Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?

• FM
• DRM
• SSB
• PM

Which type of modulation is commonly used for VHF and UHF voice repeaters?

• AM
• SSB
• PSK
• FM or PM

Which of the following types of signal has the narrowest bandwidth?

• FM voice
• SSB voice
• CW
• Slow-scan TV

Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications?

• Upper sideband
• Lower sideband
• Suppressed sideband
• Inverted sideband

What is a characteristic of single sideband (SSB) compared to FM?

• SSB signals are easier to tune in correctly
• SSB signals are less susceptible to interference
• SSB signals have narrower bandwidth
• All these choices are correct

What is the approximate bandwidth of a typical single sideband (SSB) voice signal?

• 1 kHz
• 3 kHz
• 6 kHz
• 15 kHz

What is the approximate bandwidth of a VHF repeater FM voice signal?

• Less than 500 Hz
• About 150 kHz
• Between 10 and 15 kHz
• Between 50 and 125 kHz

What is the approximate bandwidth of AM fast-scan TV transmissions?

• More than 10 MHz
• About 6 MHz
• About 3 MHz
• About 1 MHz