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Electromagnetic Waves - Transmission of Information.

Information today is being increasingly transmitted
using digital signals. The amount of
information transmitted or stored is measured in bytes.

Bytes are given the symbol B.
1 kilobyte (1KB) = 1,000 bytes.
1 Megabyte (1MB) = 1,000 KB = 1,000,000 bytes.
1 Gigabyte (1GB) = 1,000 MB = 1,000,000 KB
= 1,000,000,000 bytes.
A higher quality transmission requires a larger number of bytes.

What are the Advantages of Digital Signals?

Digital signals have advantages over analogue signals.
The advantages of digital signals are
increased capacity, better quality and the
signals can be stored and processed by computers.

Increased capacity means that
more information can be sent by digital signals
than analogue signals in the same time,
using the same optical fibre or carrier wave.

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