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84 relations: Accuracy and precision, Alternating current, Antenna (radio), Astra (satellite), Astra 19.2°E, Astra 1A, Astra 1D, Astra 1E, Astra 1KR, Astra 23.5°E, Astra 2A, Astra 2B, Attenuation, Bias tee, Block upconverter, C band (IEEE), Carrier wave, Circular polarization, Coaxial cable, Crystal oscillator, Decibel, Dielectric, Dielectric resonator, Digiturk, DiSEqC, Dish Network, Duo LNB, Electronic program guide, Engineering tolerance, Feed horn, Fibre satellite distribution, Firmware, Fixed-satellite service, Freesat, Frequency mixer, Glass, Ground station, Heterodyne, High-electron-mobility transistor, Hot Bird, Intermediate frequency, Kelvin, Ku band, Laser diode, Linear polarization, Local oscillator, Low-noise amplifier, Microwave, Microwave transmission, Modulation, ..., Multiswitch, Noise figure, Noise temperature, Orthomode transducer, Oscillation, Phantom power, Phase-locked loop, Polarization (waves), Polarizer, Poly(methyl methacrylate), Polycarbonate, Printed circuit board, Quadrature amplitude modulation, Radio frequency, Radio spectrum, RF front end, Roof, Satellite dish, Satellite television, SES S.A., Set-top box, Signal-to-noise ratio, Signaling (telecommunications), Single cable distribution, Sky UK, Superheterodyne receiver, Telecommunications link, Transmit and receive integrated assembly, Tweaking, Video on demand, Wall, Waveguide, Wideband, Window. Expand index (34 more) »
Accuracy and precision
Precision is a description of random errors, a measure of statistical variability.
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Alternating current
Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.
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Antenna (radio)
In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.
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Astra (satellite)
Astra is the brand name for a number of geostationary communication satellites, both individually and as a group, which are owned and operated by SES S.A., a global satellite operator based in Betzdorf, in eastern Luxembourg.
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Astra 19.2°E
Astra 19.2°E is the name for the group of Astra communications satellites co-located at the 19.2°East orbital position in the Clarke Belt that are owned and operated by SES based in Betzdorf, Luxembourg.
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Astra 1A
Astra 1A was the first satellite launched and operated by SES (Société Européenne des Satellites), launched in December 1988.
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Astra 1D
Astra 1D is a geostationary communications satellite launched in 1994 by the Société Européenne des Satellites (SES).
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Astra 1E
Astra 1E is one of the Astra communications satellites in geostationary orbit owned and operated by SES.
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Astra 1KR
Astra 1KR is one of the Astra geostationary satellites owned by SES.
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Astra 23.5°E
Astra 23.5°E is a group of Astra communications satellites co-located at the 23.5° east position in the Clarke Belt owned and operated by SES based in Betzdorf, Luxembourg.
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Astra 2A
Astra 2A is one of the Astra communications satellites owned by SES.
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Astra 2B
Astra 2B is one of the Astra communications satellites owned and operated by SES.
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Attenuation
In physics, attenuation or, in some contexts, extinction is the gradual loss of flux intensity through a medium.
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Bias tee
A bias tee is a three-port network used for setting the DC bias point of some electronic components without disturbing other components.
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Block upconverter
A block upconverter (BUC) is used in the transmission (uplink) of satellite signals.
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C band (IEEE)
The C-band is a designation by the Institute of Electrical and Electronics Engineers (IEEE) for a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 4.0 to 8.0 gigahertz (GHz); however, this definition is the one used by radar manufacturers and users, not necessarily by microwave radio telecommunications users.
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Carrier wave
In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.
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Circular polarization
In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electric field of the wave has a constant magnitude but its direction rotates with time at a steady rate in a plane perpendicular to the direction of the wave.
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Coaxial cable
Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.
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Crystal oscillator
A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a precise frequency.
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Decibel
The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.
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Dielectric
A dielectric (or dielectric material) is an electrical insulator that can be polarized by an applied electric field.
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Dielectric resonator
A dielectric resonator is a piece of dielectric (nonconductive) material, usually ceramic, that is designed to function as a resonator for radio waves, generally in the microwave and millimeter wave bands.
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Digiturk
Digiturk is a Turkish satellite television provider founded in 1999, with services starting in mid-2000.
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DiSEqC
DiSEqC (Digital Satellite Equipment Control), pronounced "Die-Sec", is a special communication protocol for use between a satellite receiver and a device such as a multi-dish switch or a small dish antenna rotor.
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Dish Network
Dish Network Corporation +1-８５５-５５３-９４４４ is a U.S. television provider.
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Duo LNB
A Duo LNB is a double low-noise block downconverter (LNB) developed by SES for the simultaneous reception of satellite television signals from both the Astra 23.5°E and Astra 19.2°E satellite positions.
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Electronic program guide
Electronic program guides (EPGs) and interactive program guides (IPGs) are menu-based systems that provide users of television, radio and other media applications with continuously updated menus displaying broadcast programming (TV listings in the UK) or scheduling information for current and upcoming programming.
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Engineering tolerance
Engineering tolerance is the permissible limit or limits of variation in.
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Feed horn
In parabolic antennas such as satellite dishes, a feed horn (or feedhorn) is a small horn antenna used to convey radio waves between the transmitter and/or receiver and the parabolic reflector.
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Fibre satellite distribution
Fibre satellite distribution is a technology that enables satellite TV signals from an antenna to be distributed using an optical fibre cable infrastructure and then converted to electrical signals for use with conventional set-top box receivers.
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Firmware
In electronic systems and computing, firmware is a specific class of computer software that provides the low-level control for the device's specific hardware.
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Fixed-satellite service
Fixed-satellite service (short: FSS | also: fixed-satellite radiocommunication service) is – according to article 1.21 of the International Telecommunication Union´s (ITU) Radio Regulations (RR) – defined as A radiocommunication service between earth stations at given positions, when one or more satellites are used; the given position may be a specified fixed point or any fixed point within specified areas; in some cases this service includes satellite-to-satellite links, which may also be operated in the inter-satellite service; the fixed-satellite service may also include feeder links for other space radiocommunication services.
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Freesat
Freesat is a free-to-air digital satellite television service in the United Kingdom, provided by joint venture between the BBC and ITV plc.
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Frequency mixer
In electronics, a mixer, or frequency mixer, is a nonlinear electrical circuit that creates new frequencies from two signals applied to it.
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Glass
Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative usage in, for example, window panes, tableware, and optoelectronics.
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Ground station
A ground station, earth station, or earth terminal is a terrestrial radio station designed for extraplanetary telecommunication with spacecraft (constituting part of the ground segment of the spacecraft system), or reception of radio waves from astronomical radio sources.
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Heterodyne
Heterodyning is a signal processing technique invented in 1901 by Canadian inventor-engineer Reginald Fessenden that creates new frequencies by combining or mixing two frequencies.
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High-electron-mobility transistor
A High-electron-mobility transistor (HEMT), also known as heterostructure FET (HFET) or modulation-doped FET (MODFET), is a field-effect transistor incorporating a junction between two materials with different band gaps (i.e. a heterojunction) as the channel instead of a doped region (as is generally the case for MOSFET).
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Hot Bird
Hot Bird is a group of satellites operated by Eutelsat, located at 13°E over the Equator (orbital position) and with a transmitting footprint over Europe, North Africa and the Middle East.
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Intermediate frequency
In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier wave is shifted as an intermediate step in transmission or reception.
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Kelvin
The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.
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Ku band
The Ku band is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz).
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Laser diode
A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diode's junction.
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Linear polarization
In electrodynamics, linear polarization or plane polarization of electromagnetic radiation is a confinement of the electric field vector or magnetic field vector to a given plane along the direction of propagation.
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Local oscillator
In electronics, a local oscillator (LO) is an electronic oscillator used with a mixer to change the frequency of a signal.
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Low-noise amplifier
A low-noise amplifier (LNA) is an electronic amplifier that amplifies a very low-power signal without significantly degrading its signal-to-noise ratio.
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Microwave
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
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Microwave transmission
Microwave transmission is the transmission of information or energy by microwave radio waves.
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Modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
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Multiswitch
A multiswitch is a device used with a dual or quattro LNB to distribute satellite TV signals to multiple (usually more than four) receivers from a single dish and LNB.
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Noise figure
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a signal chain.
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Noise temperature
In electronics, noise temperature is one way of expressing the level of available noise power introduced by a component or source.
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Orthomode transducer
An orthomode transducer (OMT) is a waveguide component.
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Oscillation
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
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Phantom power
Phantom power, in the context of professional audio equipment, is DC electric power transmitted through microphone cables to operate microphones that contain active electronic circuitry.
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Phase-locked loop
A phase-locked loop or phase lock loop abbreviated as PLL is a control system that generates an output signal whose phase is related to the phase of an input signal.
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Polarization (waves)
Polarization (also polarisation) is a property applying to transverse waves that specifies the geometrical orientation of the oscillations.
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Polarizer
A polarizer or polariser is an optical filter that lets light waves of a specific polarization pass through while blocking light waves of other polarizations.
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Poly(methyl methacrylate)
Poly(methyl methacrylate) (PMMA), also known as acrylic or acrylic glass as well as by the trade names Crylux, Plexiglas, Acrylite, Lucite, and Perspex among several others (see below), is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass.
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Polycarbonate
Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures.
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Printed circuit board
A printed circuit board (PCB) mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate.
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Quadrature amplitude modulation
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information.
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Radio frequency
Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.
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Radio spectrum
The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3 000 GHz (3 THz).
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RF front end
In a radio receiver circuit, the RF front end is a generic term for all the circuitry between the antenna up to and including the mixer stage.
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Roof
A roof is part of a building envelope.
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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.
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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.
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SES S.A.
SES S.A. is a communications satellite owner and operator providing video and data connectivity worldwide to broadcasters, content and internet service providers, mobile and fixed network operators, governments and institutions, with a mission to “connect, enable, and enrich”.
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Set-top box
A set-top box (STB) or set-top unit (STU) (one type also colloquially known as a cable box) is an information appliance device that generally contains a TV-tuner input and displays output to a television set and an external source of signal, turning the source signal into content in a form that then be displayed on the television screen or other display device.
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Signal-to-noise ratio
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
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Signaling (telecommunications)
In telecommunication, signaling has the following meanings.
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Single cable distribution
Single cable distribution is a satellite TV technology that enables the delivery of broadcast programming to multiple users over a single coaxial cable, and eliminates the numerous cables required to support consumer electronics devices such as twin-tuner Digital Video Recorders (DVRs) and high end receivers.
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Sky UK
Sky UK (formerly British Sky Broadcasting Limited, BSkyB and Sky) is a telecommunications company which serves the United Kingdom.
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Superheterodyne receiver
A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency.
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Telecommunications link
In telecommunications a link is a communication channel that connects two or more devices.
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Transmit and receive integrated assembly
A transmit and receive integrated assembly (TRIA) is used on a two-way satellite dish to process signals to and from a ground-based system and an earth-orbiting satellite.
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Tweaking
Tweaking refers to fine-tuning or adjusting a complex system, usually an electronic device.
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Video on demand
Video on demand is a programming system which allows users to select and watch/listen to video or audio content such as movies and TV shows whenever they choose, rather than at a scheduled broadcast time, the method that prevailed with over-the-air programming during the 20th century.
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Wall
A wall is a structure that defines an area, carries a load, or provides shelter or security.
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Waveguide
A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting expansion to one dimension or two.
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Wideband
In communications, a system is wideband when the message bandwidth significantly exceeds the coherence bandwidth of the channel.
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Window
A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and air.
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Block converter, Blockconverter, LNBF, Low Noise Block Converter, Low noise block-downconverter, Low noise blockconverter, Low noise converter, Low-noise block converter, Low-noise blockconverter, Low-noise converter.
References
[1] https://en.wikipedia.org/wiki/Low-noise_block_downconverter
