AM
What does AM stand for?
Answer: Amplitude Modulation
What is the purpose of modulation?
Answer: To transmit information efficiently over long distances.
Symbol used for modulation index?
Answer: m
What shape is the carrier wave?
Answer: Sine wave
Which radio broadcasting system uses AM?
Answer: AM Radio
Which parameter of the carrier is varied in AM?
Answer: Amplitude
Name the frequency components present in an AM spectrum.
Answer: Carrier, USB, LSB
What is the ideal range of m?
Answer: 0 ≤ m ≤ 1
What does the envelope represent?
Answer: Message signal
: AM is primarily used in which frequency band?
Answer: Medium Frequency (MF)
What are the three components of an AM signal?
Answer: Carrier, Upper Sideband, Lower Sideband
What is the bandwidth of an AM signal?
Answer: 2fm
What is overmodulation?
Answer: m > 1
What occurs in overmodulated waveforms?
Answer: Envelope distortion
One advantage of AM receivers?
Answer: Simple and inexpensive
What is the standard unit of frequency?
Answer: Hertz (Hz)
Why is a high-frequency carrier used?
Answer: Efficient radiation and transmission.
What happens when m = 0?
Answer: Only carrier exists
Which detector is commonly used for AM demodulation?
Answer: Envelope detector
One major disadvantage of AM?
Answer: Poor noise immunity
What type of signal carries the information in AM?
Answer: Message/Modulating Signal
Which sidebands contain the information?
Answer: Upper and Lower Sidebands
Define 100% modulation.
Answer: m = 1
What happens to sidebands when fm increases?
Answer: Sidebands move farther from the carrier
Name a modern application where AM principles are still relevant.
Answer: Aviation communication, telemetry, or RF systems