12th physics. NCERT notes

The bandwidth of a signal is defined as the difference between the upper and lower frequencies of signal. In a communication system, the message signal can be voice, picture or computer data. This has been shown in the table given as below:

Bandwidth of transmission medium
Bandwidth of transmission medium

The commonly used transmission media are wire, free space, fiber optic cable (750 MHz) and optical fiber (100 GHz). This range is sub-divided further and allocated for various services as indicated in the table given as below:

Bandwidth of Signals
Bandwidth of Signals

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