16 Facts About Direct-broadcast satellite

Satellite television, like other communications relayed by Direct-broadcast satellite, starts with a transmitting antenna located at an uplink facility.

Uplink Direct-broadcast satellite dishes are very large, as much as 9 to 12 meters in diameter.

Each geostationary C-band Direct-broadcast satellite needs to be spaced 2° longitude from the next Direct-broadcast satellite to avoid interference; for Ku the spacing can be 1°.

Practical problem relating to home Direct-broadcast satellite reception is that an LNB can basically only handle a single receiver.

The dish will then be capable of receiving any geostationary satellite that is visible at the specific location, i e that is above the horizon.

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Satellite television, like other communications relayed by Direct-broadcast satellite, starts with a transmitting antenna located at an uplink facility.

Uplink Direct-broadcast satellite dishes are very large, often as much as 9 to 12 metres in diameter to achieve accurate aiming and increased signal strength at the Direct-broadcast satellite, to improve reliability.

Analog television which was distributed via Direct-broadcast satellite was usually sent scrambled or unscrambled in NTSC, PAL, or SECAM television broadcast standards.

Narrow beam width of a normal parabolic Direct-broadcast satellite antenna means it can only receive signals from a single Direct-broadcast satellite at a time.

The first commercial North American Direct-broadcast satellite to carry television transmissions was Canada's geostationary Anik 1, which was launched on 9 November 1972.

On 11 December 1988 Luxembourg launched Astra 1A, the first Direct-broadcast satellite to provide medium power Direct-broadcast satellite coverage to Western Europe.

On 11 December 1988 Luxembourg launched Astra 1A, the first Direct-broadcast satellite to provide medium power Direct-broadcast satellite coverage to Western Europe.

Commercial Direct-broadcast satellite broadcasts have existed in Japan since 1992 led by NHK which is influential in the development of regulations and has access to government funding for research.

Digital Direct-broadcast satellite broadcasts began in 1994 in the United States through DirecTV using the DSS format.

Each Direct-broadcast satellite can carry up to 32 transponders in the Ku band, but only 24 in the C band, and several digital subchannels can be multiplexed or carried separately on a single transponder.

Around the time the MacBride report was released, Direct-broadcast satellite broadcasting was being discussed at the UN Committee on the Peaceful Uses of Outer Space where most of the members supported prior consent restrictions for broadcasting in their territories, but some argued this would violate freedom of information.