What is ANALOG TRANSMISSION ? How Useful in practicing Amateur Hobby

Analog Transmission is the transmission of signals that vary smoothly with time.
An analog signal can take on any value in a specified range of values. A simple example is alternating current (AC), which continually varies between about +110 volts and -110 volts in a sine wave fashion 60 times per second.

A more complex example of an analog signal is the time-varying electrical voltage generated when a person speaks into a dynamic microphone or telephone. Analog signals such as telephone speech contain a wealth of detail but are not readily accessible to computers unless they are converted to digital form using a device such as an analog-to-digital converter (ADC).

Analog signals are usually specified as a continuously varying voltage over time and can be displayed on a device known as an oscilloscope.

The maximum voltage displacement of a periodic (repeating) analog signal is called its amplitude, and the shortest distance between crests of a periodic analog wave is called its wavelength.

SOURCE: Network Encyclopedia
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