The Nail Station
Satellite Steve’s TV Solutions
Part 3 of some of the more commonly used terms in the world of TV
Gain: Measure of the increase in power or amplitude of a signal passing through a devise, usually expressed as the ratio of the output level to the input level in decibels (dB).
Geostationary Satellite: Satellite in geostationary orbit, appearing to be positioned at a fixed point in the skies when viewed from earth. Geostationary TV satellites require a fixed antenna
Global Positioning System (GPS): Satellite navigation system developed by the US military but open to civilian use. Officially called Navstar, a constellation of 24-32 medium earth orbit satellites transmit precise time & position data to a receiver that triangulates its position. Used in Satnav systems
Headend: Equipment used to receive satellite broadcasts & process the signals for subsequent terrestrial delivery. Both cable systems & distribution systems in flats & housing estates incorporate a headend
High Band: Upper part (11.70-12.75GHz) of the KU-band downlink frequency range. Accessed with a universal LNB by applying a 22KHz tone to the power supply voltage from the receiver
High Definition TV: Television display format using an increased resolution or number of picture lines for an improved image. Currently, 720p, 1080i & 1080p formats are considered high definition
Horizontal Polarisation: Polarisation of the received satellite signal where the electric field is aligned with the local horizontal plane. Horizontally polarised signals are accessed with a universal LNB by applying an 18V power supply from the receiver
Horn: Satellite antenna comprising a large funnel collector sometimes combined with a microwave lens to channel the signal directly into a forward- facing LNB, in effect, an enlarged feed horn
Integrated Receiver/Decoder (IRD): Satellite receiver with a built-in decoder. A term usually used for analogue pay-TV receivers
Interactive Services: Video &/or data broadcast alongside a TV channel or available online & accessed by the viewer (typically by pressing the red button) instead of, or overlaid on, the TV channel to provide news, background information, games, different camera angles, video-on-demand, etc
Yvonne Larkin
IBD Nail Technician & Beautician 649 742 266
Centro Comercial Arenal Primera Planta Numero 27 25
Internet Protocol Television (IPTV): Digital television broadcast using Internet Protocol over a network infrastructure
Jamming: Deliberate transmission of a secondary radio signal to override or interfere with a primary signal & disrupt communications. Many countries have engaged in satellite TV jamming at some time for political or commercial purposes
Key: Sequence of characters used by an algorithm to encode a digital signal to render it useless. The same key is used to resurrect the original data from the encrypted stream. Encryption systems can change the encryption key several times a second to prevent unauthorised decryption
KU-Band: Portion of the microwave frequency spectrum (10.70-17.00GHz) most commonly used for satellite TV DTH transmissions, at first in Europe & now worldwide. Only the 10.70-12.75GHz range is normally used for downlink transmissions
www.ccsattv.com
Crystal Clear Satellite & Internet TV 965 584 097 or 660 186 505
info@ccsattv.com Steve Wood
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