Satellite TV with Spot Beam Technology
Spot beams bring Satellite TV to the next level. Spot beams help EchoStar to supply additional local channels to definite, exactly defined areas, bettering its service to compete with local cable TV suppliers. The satellites Echo I to Echo VI utilize beams that cover the whole country. To supply local transmit coverage, channels aimed for just single local market are messed up, and so the viewers in another place cannot watch those channels.
The latest “spot beam satellites” are made to aim spot beams at preferred metropolitan markets, permitting the similar radio frequencies to be used again in different cities, therefore rising the channel capacity. The satellites EchoStar VII and EchoStar VIII are spot beam satellites. By means of these two extremely great spot beam satellites, the service providers can direct nearly 50 various spot beam projections to the United States and transmit many other local programs to the other areas. Each spot beam gets a fairly accurate diameter of 300 miles, which makes them the dominant satellites.
At the same time the programs from the content providers are transmitted to the satellites from any one of the uplink centers, the transmission makes use of a distinctive radio frequency channel. It is comparable to traffic roads on a highway. Each radio frequency channel represents a traffic road, which maintains the signals from prying with one another on the way to the satellite. This is known as uplinking. Distinctive frequencies are also brought into play to downlink programs from the satellite to the homes of the customers.
The transponders of the satellites obtain signals from earth on one frequency and strengthen them to put them on the air back to the earth on a different frequency. On a CONUS (CONtinental United States) satellite, every frequency downlinks programs to the entire United States. On a spot beam satellite, frequencies are used again and downlinked to up to five various spot beam locations. There are five downlink spot beam frequencies obtainable for use on both of the new satellites, Echo VII and Echo VIII, and each frequency can be utilized in five different beams. Hence, 25 spot beam frequencies will be obtainable per spot beam satellite. Every beam carries between one and three of the various re-used frequencies, based on the number of programming channels required in that designated market area. Every spot beam frequency can telecast ten to twelve programming channels.
The spot beams consist of two areas, which are high beam areas and low beam areas. The high beam area is the center part of a spot beam projection. The customers who have positioned here will receive the most substantial spot beam signal strength, which is better than the CONUS signal in the region. This region is about 300 miles in diameter. The low beam or fringe area is the region present just outside the high beam area. If any customers have been positioned in this region, they may receive only insignificant signal strength since their spot signal will be less forceful than the CONUS signal in the region.
Written by David Johnson.