12 Questions
What unit is used to measure the frequency of a wave?
Hertz
Which frequency band is a common WiFi band used for communication?
5 GHz
What does amplitude modulation (AM) mainly modulate when transmitting a signal?
Amplitude
In information theory, what does a signal represent?
A message sequence
What is the process of varying the carrier wave frequency in accordance with the modulating signal called?
Frequency modulation
What does demodulation involve in a communication system?
Decoding information
Why was frequency modulation (FM) originally introduced?
To reduce noise and improve radio reception quality
Who developed FM (frequency modulation) radio?
Edwin Howard Armstrong
Which individual is known for discovering amplitude modulation (AM) radio?
Reginald Fessenden
What is the main advantage of frequency modulation (FM) over amplitude modulation (AM)?
Less vulnerability to noise
In communication systems, what does a channel refer to?
The medium through which messages are transmitted
How is the capacity of a communication channel often measured?
By its bandwidth in Hz or data rate in bits per second
Test your knowledge about the frequency of waves, measured in Hertz (Hz), common WiFi bands like 2.4 GHz and signal codification in information theory. Explore how different frequencies impact speed and broadcast range.
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