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DiSEqC
Digital Satellite Equipment Control (DiSEqC) () is a communication protocol between a satellite receiver and a device such as a multi-dish switch or a small dish antenna rotor. DiSEqC was developed by European satellite provider Eutelsat, which now acts as the standards agency for the protocol. History Eutelsat apparently developed the system to allow satellite users in Continental Europe to switch between the more popular SES Astra satellites at 19.2° east and Eutelsat's own Hot Bird system at 13° east. As a result, the vast majority of European satellite receivers support DiSEqC 1.0 or higher, with the exception of all set top boxes manufactured under the Sky Digibox name. All supporting receivers have received certification to carry a logo specifying which variation of DiSEqC they support. Protocol DiSEqC relies only upon a coaxial cable to transmit both bidirectional data/signals and power. DiSEqC is commonly used to control switches and motors, and is more flexible ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universal Satellites Automatic Location System
Universal Satellites Automatic Location System (USALS), also known (unofficially) as '' DiSEqC 1.3'', ''Go X'' or ''Go to XX'' is a satellite dish motor protocol that automatically creates a list of available satellite positions in a motorised satellite dish A satellite dish is a dish-shaped type of parabolic antenna designed to receive or transmit information by radio waves to or from a communication satellite. The term most commonly means a dish which receives direct-broadcast satellite televisio ... setup. It is used in conjunction with the DiSEqC 1.2 protocol. It was developed by STAB, an Italian motor manufacturer, who still make the majority of USALS compatible motors. Software on the satellite receiver (or external positioner) calculates the position of all available satellites from an initial location (input by the user), which is the latitude and longitude relative to Earth. Calculated positions can differ ±0.1 degrees from the offset. This is adjusted automatical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monoblock LNB
Low-noise block downconverters (LNBs) are electronic devices coupled to satellite dishes for TV reception or general telecommunication that convert electromagnetic waves into digital signals that can be used to transform information into human or machine interpretable data, e.g., optical images, video, code, communications, etc. Monoblock (or monobloc) low-noise block downconverters are a special type of LNBs representing a single device that contains several (typically 2–4) LNB units and a Digital Satellite Equipment Control (DiSEqC) switch. The latter allows the recipient to receive signals from several neighboring satellites each communicating different channels or signals which increases the potential bandwidth of the receiver. The two, three, or four LNBs can be automatically addressed with any DiSEqC 1.0 or higher receiver. In some cases, they can also be addressed with ToneBurst/MiniDiSEqC. However, they are only available for satellites with a fixed 3-degree, 4°, 4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automatic Tracking Satellite Dish
Automatic Tracking Satellite Dishes are satellite dishes used while a vehicle, boat or ship is in motion. Automatic tracking satellite dishes utilize gyroscopes, GPS position sensors, and uses unique satellite identification data and an integrated DVB decoder to aid in identification of the satellite that it is pointing at. The dishes consist usually of stepper motors to drive and aim the dish, gyroscopes to detect changes in position while the vehicle is in motion, a parabolic reflector, low-noise block converter, and control unit. They can use also shifted Phased arrays. (example: Starlink Dish). Manufacturers * Winegard Company * KVH Industries * Sea Tel * Orbit Technology Group * Ten-Haaft * SpaceX: Starlink Dish See also * USALS = Universal Satellites Automatic Location System * DiSEqC = Digital Satellite Equipment Control * SAT>IP end user consumer equipment that can switch different ip streams from different SAT>IP servers and facilitates selection of recep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sat-IP
SAT>IP (or Sat-IP) specifies an IP-based client–server communication protocol for a TV gateway in which SAT>IP servers, connected to one or more DVB broadcast sources, send the program selected and requested by an SAT>IP client over an IP-based local area network in either unicast for the one requesting client or multicast in one datastream for several SAT>IP clients. While the system, originating from the DBS satellite operator SES, is originally geared towards receiving and distributing satellite broadcasts in DVB-S or DVB-S2 encoding, SAT>IP also specifies formats for the SAT>IP client request to specify programs broadcast via DVB-C and DVB-T. Only the SAT>IP servers need tuning hardware and software specific to the DVB-broadcast system(s) being used; SAT>IP clients can be any IP-enabled client multimedia device – Tablets, PCs, laptops, Smartphones, “connected” TVs, video game consoles, media players or others. The main difference of S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Television
Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location.ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.39, definition: ''Broadcasting-satellite service'' The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block downconverter. A satellite receiver decodes the desired television program for viewing on a television set. Receivers can be external set-top boxes, or a built-in television tuner. Satellite television provides a wide range of channels and services. It is usually the only television available in many remote geographic areas without terrestrial television or cable television service. Different receivers are required for the two types. Some transmissions and channels are unencrypted and therefore free-to-air, while many other channels are transmitted with enc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Low-noise Block Downconverter
A low-noise block downconverter (LNB) is the receiving device mounted on satellite dishes used for satellite TV reception, which collects the radio waves from the dish and converts them to a signal which is sent through a cable to the receiver inside the building. Also called a low-noise block, low-noise converter (LNC), or even low-noise downconverter (LND),Bains, Geoff. "Getting The Most Out Of An LNB" ''What Satellite & Digital TV'' (November, 2008) pp50-51 the device is sometimes inaccurately called a ''low-noise amplifier'' (''LNA''). The LNB is a combination of low-noise amplifier, frequency mixer, local oscillator and intermediate frequency (IF) amplifier. It serves as the RF front end of the satellite receiver, receiving the microwave signal from the satellite collected by the dish, amplifying it, and downconverting the block of frequencies to a lower block of intermediate frequencies (IF). This downconversion allows the signal to be carried to the indoor satellite T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutelsat
Eutelsat S.A. is a French satellite operator. Providing coverage over the entire European continent, the Middle East, Africa, Asia and the Americas, it has been the world's third-largest satellite operator in terms of revenues. Its subsidiary Eutelsat OneWeb is a competitor to Elon Musk's Starlink. Eutelsat's satellites are used for broadcasting nearly 7,000 television stations, of which 1,400 are in high-definition television, and 1,100 radio stations to over 274 million cable and satellite homes. They also serve requirements for TV contribution services, corporate networks, mobile communications, Internet backbone connectivity and broadband access for terrestrial, maritime and in-flight applications. Eutelsat is headquartered in Paris, France. Eutelsat Communications Chief Executive Officer is currently Eva Berneke. In October 2017, Eutelsat acquired Noorsat, one of the leading satellite service providers in the Middle East, from Bahrain's Orbit Holding Group. Noorsat is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duplex (telecommunications)
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment of equipment in the field. There are two types of duplex communication systems: full-duplex (FDX) and half-duplex (HDX). In a full-duplex system, both parties can communicate with each other simultaneously. An example of a full-duplex device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. The earphone reproduces the speech of the remote party as the microphone transmits the speech of the local party. There is a two-way communication channel between them, or more strictly speaking, there are two communication channel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starlink
Starlink is a satellite internet constellation operated by Starlink Services, LLC, an international telecommunications provider that is a wholly owned subsidiary of American aerospace company SpaceX, providing coverage to around 130 countries and territories. Timestamp 12:00. It also aims to provide global mobile broadband. Starlink has been instrumental to SpaceX's growth. SpaceX began launching Starlink satellites in 2019. , the constellation consists of over 7,600 mass-produced small satellites in low Earth orbit (LEO) that communicate with designated ground transceivers, and Starlink comprises 65% of all active satellites. Nearly 12,000 satellites are planned, with a possible later extension to 34,400. SpaceX announced reaching over 1 million subscribers in December 2022 and 4 million subscribers in September 2024. The SpaceX satellite development facility in Redmond, Washington, houses Starlink research, development, manufacturing, and orbit control facilities. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Television Receive-only
Television receive-only (TVRO) is a term used chiefly in North America, South America to refer to the reception of satellite television from FSS-type satellites, generally on C-band analog; free-to-air and unconnected to a commercial DBS provider. TVRO was the main means of consumer satellite reception in the United States and Canada until the mid-1990s with the proliferation of encryption and the arrival of direct-broadcast satellite television services such as PrimeStar, USSB, Bell Satellite TV, DirecTV, Dish Network, Sky TV that transmit Ku signals. While these services are at least theoretically based on open standards (DVB-S, MPEG-2, MPEG-4), the majority of services are encrypted and require proprietary decoder hardware. TVRO systems relied on feeds being transmitted unencrypted and using open standards, which heavily contrasts to DBS systems in the region. The term is also used to refer to receiving digital television " backhaul" feeds from FSS-type satellites. Receptio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Energy
Electrical energy is the energy transferred as electric charges move between points with different electric potential, that is, as they move across a voltage, potential difference. As electric potential is lost or gained, work is done changing the energy of some system. The amount of work in Joule, joules is given by the product of the charge that has moved, in Coulomb, coulombs, and the potential difference that has been crossed, in Volt, volts. Electrical energy is usually sold by the kilowatt hour (1 kW·h = 3.6 MJ) which is the product of the power in kilowatts multiplied by running time in hours. Electric utilities measure energy using an electricity meter, which keeps a running total of the electrical energy delivered to a customer. Electric heating is an example of converting electrical energy into thermal energy. The simplest and most common type of electric heater uses electrical resistance to convert the energy. There are other ways to use electrical energy. Electri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signal
A signal is both the process and the result of transmission of data over some media accomplished by embedding some variation. Signals are important in multiple subject fields including signal processing, information theory and biology. In signal processing, a signal is a function that conveys information about a phenomenon. Any quantity that can vary over space or time can be used as a signal to share messages between observers. The '' IEEE Transactions on Signal Processing'' includes audio, video, speech, image, sonar, and radar as examples of signals. A signal may also be defined as observable change in a quantity over space or time (a time series), even if it does not carry information. In nature, signals can be actions done by an organism to alert other organisms, ranging from the release of plant chemicals to warn nearby plants of a predator, to sounds or motions made by animals to alert other animals of food. Signaling occurs in all organisms even at cellular leve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
