Posts Tagged ‘dvb’
Saturday, August 28th, 2010
Digital Satellite Receiver
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Sangean DT-200X FM-Stereo AM/FM Digital Tuning Personal Receiver
$39.99
Sangean’s DT-200VX builds on the success of its predecessor, the DT-200X – a popular belt radio for over a decade. It has great selectivity and responsiveness and picks up stations in areas where no other radio could. Along with great reception in the classic black case, you’ll also get the handy belt clip, a set of ear buds and an external antenna. The DT-200VX also has a clock, backlight and dee…
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Sunday, October 4th, 2009
digital receiver satellite
Wednesday, September 9th, 2009
satelite pc
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Toshiba Satellite L305-S5924 15.4-Inch Laptop
$519.99
With powerful processing power and ample memory, the Toshiba Satellite L305-S5924 notebook PC is a great mobile computing choice for the home, students, and small businesses. The integrated 54g Wi-Fi networking (802.11b/g) lets you stay connected or work the Web at any wireless hotspot, while the cool Onyx Blue finish satisfies your requirements for style. It features a large, bright 15.4-inch XGA…
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Toshiba Satellite L505-S6959 16.0-Inch Laptop – Black/Grey
$699.99
Offering solid performance and impressive affordability, the Satellite L505 laptop is tailor made for handling life’s essentials at home, school or work. Surfing the Net, downloading video, checking email, managing household finances or studying for finals, this easy-to-use, all-purpose, eco-smart machine makes an excellent first-time or secondary laptop. It gives you ample processing power, memor…
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Toshiba Mobile Satellite M505-S4947 14.0-Inch Laptop – Black/Silver
$899.99
Combining great portability, generous battery life and modern style in a slim, eco-smart package, the Toshiba Satellite M505-S4947 is sized to travel while providing powerful computing resources for all of your needs–work, learning and play. The 14-inch LED-backlit display offers TruBrite technology for optimal image clarity and a 1366 x 768 resolution for extra desktop working space and a widesc…
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Thursday, July 23rd, 2009
Friday, July 3rd, 2009
Band Lnbf Dual
You have probably heard about satellite dishes, maybe even seen them. But do you know what a satellite dish does or can do? If not, let us tell you all about satellite dishes, the receivers that are used with the dishes, and low noise blocks or LNBs that are an important component of this arrangement.
A satellite dish is shaped like a parabola and works like an antenna. This dish is designed to capture signals on the microwave frequency from communication satellites in orbit around the world. A satellite dish can be used for both, sending out signals (Satellite TV) as well as work as data transmitters. The parabolic shape of these satellite dishes help to absorb signals to their core or center. The feedhorn or the center-point of the dish is designed to collect and conduct signals to, what is known as, a block down converter. This converter is commonly known as a low noise block or LNB.
LNBs are instrumental in converting the many signals emitted at the various frequencies like radio, electromagnetic etc. The reason for conversion is to make these signals more readable, recognizable. A LNB can also shift signals from low-band frequencies like C, Ku up to L band. If you observe carefully, most of the satellite dish antennas that broadcast directly have a LNBF. A LNBF plays the dual role of a LNB and a feedhorn.
The design of satellite dishes are based on many important principles of physics. One such is that with increase in frequency, the directive gain also increases. Nevertheless, the actual gain depends on several other important factors as well include the material of the dish, its surface finish, the level of accuracy while manufacturing the dish, and the feedhorn. However, some other satellite dishes like those that function on low-band frequencies like C, allow for more flexibility with regards the design and material used. It’s safe to say that such dishes are more versatile and offer better performance. Engineers are currently experimenting with the material used to build the large satellite dishes and an outcome of this effort is the use of metal mesh in an all metal frame. Unfortunately, as the frequencies increase, metal mesh becomes redundant.
The satellite dishes used nowadays, especially for DishTV, have a fixed diameter that ranges from 43cm (18 in) – 80cm (31 in). Unidirectional in direction, these dishes communicate with other satellites in orbit on the Ku-bandwidth. Satellite dishes that have 60cm diameter with a gain value of 37.50dB at 11.75 GHz are the most commonly employed commercial purpose antennas.
Another important component of a satellite TV system is the receiver. Satellite receivers are used to do the following:
1. Descramble encrypted signals
2. Convert digital formats like MPEG-2 or MPEG-4 signals into readable or analog formats that can be read by your TV
3. Pull out channels, one at a time from larger orbiting satellites and
4. Send billing, pay-per-view information etc on a timely basis from the customers to the central command.
With technology, all these components will change and improve, but they will always remain a sound investment.
For further information, please visit website of FTA Satellite Store [http://www.satphire.com]
Tags: chaparral,ku,linear,universal,quad,dual,double,single,heavy, duty,universal, dvb, lnb Posted in Satellite TV Products | No Comments »
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