TELEVISION CENTRAL ANTENNA DISTRIBUTION CONCEPT.

TELEVISION CENTRAL ANTENNA DISTRIBUTION CONCEPT.

It is used to distribute the signals from one TV antenna (or TV antenna array) to a number of wall outlets located at convenient points in all or most rooms of the house. The TV antenna signals are fed through coaxial cable to a distribution amplifier. This amplifier increases the strength of the signals and then splits them into two or more outputs. The signals at these outputs are fed through coaxial cable to conveniently located splitters. The splitters, in turn, divide the main branches into subbranches, which feed the wall outlets in one or two rooms. Coaxial cable is used throughout the system. Ideally, a home MATV system should be installed while the house is being built, so that the cables can be conveniently run inside the walls. However, a MATV system can also be installed in a finished house by feeding the cables into the wall spaces through holes drilled in the attic floor above the spaces. The cable-entry holes also can be drilled through the main floor from the basement or crawl space. 

 A television antenna, or TV aerial, is an antenna specifically designed for the reception of over the air broadcast television signals, which are transmitted at frequencies from about 41 to 250 MHz in the VHF band, and 470 to 960 MHz in the UHF band in different countries. Television antennas are manufactured in two different types; "indoor" antennas, to be located on top of or next to the television set, and "outdoor" antennas, mounted on a mast on top of the owner's house. The most common types of antennas used are the dipole ("rabbit ears") and loop antennas, and for outdoor antennas the yagi and log periodic.

When signal levels are weak, a TV antenna preamplifier should be used as this will give the lowest system noise figure. A distribution amplifier  is a type of amplifier that is mounted indoors, usually in a central location. It is designed to provide amplified signals to a number of TV sets. The term "amplified" means that the strength of the signal is increased by electronic circuits called amplifiers. See the Channel Master catalog for models. The distribution amplifier should be mounted in a relatively central location so that the coaxial cables (through which it feed signals to TV sets) are the same length. This will help ensure that all TV sets receive the same strength of signals. In areas with very weak signals you will need to use both a mast-mounted preamp and a distribution amplifier. However, be sure the two amplifiers are matched. The term "matched" means that the electronic characteristics of the two amplifiers are similar enough to permit using them together without causing interaction and reducing picture quality. A signal-distribution system that is equipped with a matched pair of TV antenna amplifiers is called a tandem system. The matched amplifiers are called "tandem units."