Digital
A digital signal conveys information as a series of ‘on’ and ‘off’ states, which can be thought of corresponding to numbers ‘1’ and ‘0’ – this is based on the binary number system.
In a stream of 1s and 0s, each 1 and each 0 is termed a bit, and a digital signal is defined by the parameter of bits. For instance, the signal is transmitted at a certain speed called the bit-rate, which is often measured in bits per second (bps). You may recognize this when looking at the modem speed on your computer, and how fast it can communicate over a telephone line.
The advantage of using the binary system of 1s and 0s is that these numbers are very easy to transmit electronically rapidly as ‘on’ and ‘off’. Morse code is a similar type of system, where ...
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