Types of Satellite TV Systems - TVRO and DBSWritten by Gary Davis
Types of Satellite TV Systems – TVRO and DBS By Gary DavisDish-Network-Satellite-TV.ws Webmasters: You may reprint this article in its entirety, providing you leave Byline and About Author sections intact, including links to Dish Network Satellite TV. In USA there are 2 types of satellite TV systems. The first is TVRO which stands for TeleVision Receive Only. The second is DBS which stands for Direct Broadcast Satellite. TVRO – TeleVision Receive Only TVRO was first satellite system available for home viewing of satellite TV. It required a relatively big dish of 3 to 6 feet in diameter and worked in C-Band. Frequencies of around 4 G Hertz are called C-Band and require bigger dishes because wave length of these frequencies is longer than in Ku-Band which requires a much smaller dish of about 18 inches. Ku-Band is at 12 to 14 G Hertz. TVRO systems also need a movable dish because it needs to get all channels of many satellites. C-Band satellites have much less channels available than Ku-Band satellites and therefore more satellites are needed to provide enough channels. Possibilities that exist with TVRO systems is that you can also receive free channels and independent feeds from for instance news companies. You could for instance receive unedited material that is broadcasted from a news crew somewhere in coverage area of satellite. They transmit their materials to their headquarters using a C-Band satellite. Many of these types of feeds are not scrambled and are available to everyone with proper equipment.
| | How a Satellite TV Antenna WorksWritten by Gary Davis
| How a Satellite TV Antenna Works |
| By Gary Davis Dish-Network-Satellite-TV.ws Webmasters: You may reprint this article in its entirety, providing you leave Byline and About Author sections intact, including links to Dish Network Satellite TV. Practically all broadcast systems use antennas to transmit and receive radio signals. These Satellite TV antennas are based on single metal pole to which carrier signal is sent through a cable. First let’s talk about how this most simple type of antenna works: Pole Antenna A Pole antenna basically consists of one metal pole that transmits it signals around it as if it was center of a sphere. In all directions transmitted signal has same power. The length of antenna is determined by frequency of transmitted signal. Radio waves, like light waves, always travel at same speed, which is about 186.000 miles (300.000 km) per second. One wave length is determined by frequency of signal by following formula: Wavelength = speed of light / frequency This results in higher frequencies having shorter wavelengths. A pole antenna doesn’t have to have length of a complete antenna but can also have a length of about ˝ , 1/8, or 1/16 of wave length. This is done mostly for practical purposes (shorter antennas). Wave lengths for pole antennas can go as high as 1 to 2 Giga Hertz. A cell phone for instance works at frequencies of 950 Mega Hertz which is almost 1 Giga Hertz. Satellite TV or Parabolic Antenna
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