Question

Bandwidth of TV signal is
A) $6MHz$
B) $6kHz$
C) $66MHz$
D) $6Hz$

Answer 1

Hint:Bandwidth describes the maximum data transfer rate of a network or internet connection. TV signals carry both audio and video signals at a decent quality. The bandwidth required is for both audio and video.

Step by step solution:
In a communication system, the message signal can be voice, music, picture, or computer data. Each of these signals has a different range of frequencies. The type of communication system needed for a given signal depends on the band of frequencies which is considered essential for the communication process. The frequency range of a signal is called the frequency band of that signal. The difference in the highest and lowest frequencies included in a band is called bandwidth.

For speech signals, the frequency range is $0.3kHz$ to $3.1kHZ$. Therefore, the speech signal requires a bandwidth of $2.8kHz$ for commercial telephonic communication. For high-quality music, it is about $20kHz$ because of the high frequencies produced by the musical instruments.

Video signals for the transmission of pictures require about $4.2MHz$ of bandwidth. A TV signal consists of both voice and picture, it is usually allocated $6MHz$ of bandwidth for transmission. TV signal has both audio and video quality so, the bandwidth required is more that is $6MHz$.
Hence, the correct option for the given question is (A) $6MHz$.

Note:A key characteristic of bandwidth is that any band of a given width can carry the same amount of information regardless of where that band is located in the frequency spectrum. Different types of transmission media and signals have different types of bandwidth. The TV signal is a combination of both audio and video signals therefore bandwidth is more than that of video signals.