Satellite TV and viewsat files

To begin with, we will consider system of digital satellite TV to know about those, or other terms and viewsat files satellite TV. Modern companions have a geostationary orbit. It means, that angular speed of movement of the companion is equal to speed of rotation of the earth on size and a direction. It means, that concerning any point on the earth, the companion "hangs" motionlessly. The height on which the companion hangs, is equal approximately to 36 thousand kilometres. Thanks to constant position of the companion, for signal reception viewsat files from it it is not necessary to reconstruct the aerial. During all life the companion will be in the same direction from you. The number of places in a geostationary orbit where companions of a television announcement today live, is limited. Today such places about four hundred. In each place, in each point, some companions, even more than ten can hang at once. That companions did not stir each other hindrances, their frequencies of an announcement, viewsat files, zones of service and working channels get out are scattered in certain ranges. Today companions are regularly put into orbit and reduced from it. It is connected not only with the expiry of the term of service of companions which fluctuates from five till seven years, but also with an equipment obsolescence and viewsat files, and also with breakages.

Beam - the orientation diagramme, defines a cover zone viewsat files. The basic characteristic of acceptance of transfers from the companion. At different transponders the companion viewsat files can be different.

The C-range - range C centimetric (4GHz) is used on old companions and a domestic announcement. Has very wide beams. From the point of view of the simple consumer on it while it is possible to look fta TV.

Ku-range - a range 10 most popular for satellite fta announcements. In this range looking пpедачи 95 %

Transponder - the directed transmitter of the companion.

Except geostationary companions, can be used also so-called low-flying companions. A difference between them that at application of low-flying companions communication will be organised by a chain principle. Over the earth hundreds the companions informed among themselves viewsat by files fly. At reception of data from low-flying companions it is not obligatory to have the huge parabolic aerial. Will suffice also such, that is used in cellular telephones as companions radiate viewsat files on very high frequency. Advantages of use of low companions are obvious - in space it is possible to start eight hundreds satellite which will not stir each other and in regular intervals will distribute among themselves viewsat files, companions hang low, cover the small area with the big capacity of transmitters so from them it is possible to accept viewsat files on small dish. To work with low-flying companions is more expensive, and meanwhile the preference is given geostationary.

On each satellite tens transmitters as capacity of hundred Watt work. As the satellite covers with a signal big enough area of the earth (a stain in diameter 2000 - 3000 Km) signal level in different points of reception is distinguished and low.

Digital satellite fta the TV has completely superseded the analogue. Still in the early nineties the last century the standard of a compression of image MPEG-2 has been accepted. There was a possibility on satellite fta to communication channels to transfer viewsat files with a speed 1 Мbit/s, depending on quality of the image. For film viewing on the house equipment will suffice and 6-9 MBIT/WITH. To 1993 200 organisations from 30 countries of the world have come to the uniform standard of a digital announcement of video signal, DVB (Digital Video Broadcasting). Project DVB concerned not only a satellite announcement, but also to transfer viewsat files on cable channels and on an aether. Project DVB was based on application of standard MPEG-2 for transfer viewsat and video images with a multichannel soundtrack. DVB allowed to transfer also any other information in a digital form.

satellite keys
free satellite tv