Gigahertz (GHz) is a unit of frequency measurement used to measure the electrical signals sent through cables. It is the standard unit for measuring the frequency of signals transmitted over cables, and is equal to one billion Hertz (cycles per second).

Cables are composed of electrical wires, which are used to transmit data, signals, and power. These cables are composed of metal, such as copper or aluminum, that carries electrical current. The electrical current is measured in Hertz (Hz) and is the number of times the current changes direction within a second. When measuring the frequency of signals sent through cables, Gigahertz (GHz) is the standard unit used.

The frequency of a signal sent through a cable is important to ensure that it will reach its intended destination. Higher frequencies will allow the signal to travel further, and are therefore used when transmitting data over long distances. Conversely, lower frequencies are used when transmitting data over shorter distances.

The speed of the signal sent through the cable is also a factor in the frequency measurement. Higher speeds require higher frequencies, as the signal is more rapidly changing direction within a single second.

Gigahertz (GHz) is an important unit for measuring the frequency of signals sent through cables. This unit of measurement is used to ensure that the signal will travel the required distance, and that the speed of the signal is sufficient for its intended purpose. By ensuring that the frequency is accurately measured, data is able to travel accurately and quickly, providing the desired results.