Glossary of Terms and acronyms

Headend:
Electronic control Center - generally located at the antenna site of a CATV system - usually including antennas, preamplifiers, frequency converters, demodulators and other related equipment which amplify, filter and convert incoming broadcast TV signals to cable system channels.

Hertz (Hz):
The name given to the basic measure of radio frequency characteristics. An electromagnetic wave completes a full oscillation from its positive to its negative pole and back again in what is known as a cycle. A single Hertz is thus equal to one cycle per second.

Hub:
The master station through which communications to, from and between VSAT two-way terminals flow. In the future satellites with on-board processing will allow hubs to be eliminated as MESH networks are able to connect all points in a network together.

Hybrid Fibre-Coax:
Normally a cable TV term where fibre optic cable is run to a distribution point within a tree and branch coax system. The final link to the consumer is through coax cable.