As we grow older, we tend to acquire more knowledge. We can only stop learning when the spirit departs from the soul. In other words, no end to learning. satellite TV glossary & definitions are what we want to address today and I assure you, it would benefit both geeks and noobs alike. Everyone gets a take home from this including my humble self. Since we don’t expect any short from a post of this outlook, I will love to go straight to business.
- Glossary of basic mobile phones terms
- Beginner’s introduction to satellite tv technology
- iPhone, iPad definition of terms
Satellite TV glossary & definitions: A to Z
satellite TV glossary & definitions – Part 1
A switch that selects one of two inputs (A or B) for routing to a common output while providing adequate isolating between the two signals.
Access Control System – ACS:
Access Control System/s, comprising all conditional access components such as S/1, IDAC, ISAC, minicons, etc…
This is the version number of the card’s software.
There are several different software versions: 1.2, 1.4, 1.6 en 3.82, 3.83.
Versions 1.4 and 1.6 are almost identical.
A block of data that forms an extension to a transport packet header. It may be of fixed format and/or of general data
An adjacent channel is immediately next to another channel in frequency. For example, PAL channels 5 and 6, as well as 8 and 9, are adjacent.
The process of fine-tuning a dish or an electronic circuit to maximize its sensitivity and signal receiving capability.
The Irdeto successor decodes both Irdeto and Betacrypt.
An abbreviation for amplitude modulation.
A system in which signals vary continuously in contrast to a digital system in which signals vary in discrete steps.
A circuit that converts analogue signals to an equivalent digital form. The varying analogue signal is sampled at a series of points in time. The voltage at each of these points is then represented by a series of numbers, the digital value of the sample. The higher this sampling frequency, the finer are the gradations and the more accurate is the signal represented
A device that collects and focuses electromagnetic energy, i.e., contributes an energy gain. Satellite dishes, broadband antenna and cut-to-channel antennas are some types of antennas encountered. In the case of satellite dishes, the gain is proportional to the surface area of the microwave reflector.
The percentage of incoming satellite signal actually captured by an antenna system.
The collection area of a parabolic dish.
An obstruction such as the feed assembly which causes a blocking of the incoming signal.
The number that identifies the card. It is also printed on the card in bar-code.
Although it is accessible by software, to my knowledge it is never really used.
It only serves identification purposes.
The relationship between the width and height of an image; the standard DTV wide-screen ratio is 16:9 (1.78:1), as compared to the squarer NTSC ratio of 4:3 (1.33:1)
Although the real name for the coding system is Mediaguard, it is often referred to as Seca or Aston Seca. Mediaguard is developed by Seca, so the also used name Seca Mediaguard is more suitable. Aston is a company that builds the CAM’s (among others) that are used to decode the Mediaguard system.
The Seca Mediaguard coding is used by the Canal + organization which is no wonder. Canal + is a shareholder in the Seca organization and it also takes part in the development of the Mediaguard coding system. Because of the influence of Canal +, the Seca Mediaguard system is very popular in France.
The decrease in signal power that occurs in a device or when a signal travels to reach a destination point (path loss).
A passive device which reduces the power of a signal. Attenuators are rated according to the amount of signal attenuation.
Answer To Reset, or ATR for short, is the string a smart card sends to the receiver upon every reset. The ATR of each smart card conforms to the ISO7816-3 specifications. The ATR contains information about the card, for instance, information on how the receiver should communicate with the card: Voltage, Amp, Baudrate, Synchronous or Asynchronous communication etc.
The carrier wave that transmits audio information within a video broadcast signal. Satellite transmissions can relay more than a single audio subcarrier in the frequency range between 5 and 8.5 MHz.
The auto update (AU) technique makes sure the card is kept up to date in order to provide the correct keys to the CAM when requested. Providers will regularly change their operational keys and unless you have a valid set of management keys, you will soon be left with a black screen. For different coding systems, the actual keys that are used for decoding, have different names. For instance, in Irdeto, they are called Plainkeys and for Seca they are called Operational Keys.
Automatic Brightness Control:
A television circuit used to automatically adjust picture tube brightness in response to changes in background or ambient light.
Automatic Fine Tuning:
A circuit that automatically maintains the correct tuner oscillator frequency and compensates for drift and for moderate amounts of inaccurate tuning. Similar to AFC.
Automatic Frequency Control – AFC:
A circuit that locks an electronic component to a chosen frequency, so that the tuning will not drift from that chosen frequency.
Automatic Gain Control – AGC:
A circuit that uses feedback to maintain the output of an electronic component at a constant level. This is achieved by locking the gain onto a fixed value and thus compensating for varying input signal levels keeping the output constant.
Azimuth-Elevation (Az-El) Mount:
A dish mount that tracks satellites by moving in two directions: the azimuth in the horizontal plane and elevation up from the horizon.
A compass bearing expressed in degrees of rotation clockwise from true north. It is one of the two coordinates, azimuth and elevation, used to align a satellite dish.
– Audio coding 3 (see Dolby Digital).
– Advisory Committee on Advanced Television Service; special FCC committee that recommended DTV standards in 1997.
After color temp:
– Geek box term. The color temperature at a given brightness level after grayscale calibration. Usually expressed in degrees K; ideally as close to 6,500K as possible.
After grayscale variation:
– Geek box term. After calibration, the average amount of variation from an ideal of 6,500K, measured over the entire range of the grayscale–typically 20 to 100 IRE in 10-IRE increments.
– ALiS (alternate lighting of surfaces) technology developed by Fujitsu/Hitachi for plasma panel displays. On a conventional plasma TV, all pixels are illuminated at all times. With an ALiS plasma panel, alternate rows of pixels are illuminated so that half the panel’s pixels are illuminated at any moment, somewhat similarly to interlaced scanning on a CRT-type TV. This allows higher native resolution than designs with discrete pixels (typically 1,024×1,024 versus 1,024×768 for 42-inch plasmas), but ALiS has historically suffered in other areas, including black-level performance.
– A perceived chink in the armor protecting copyrighted content from unauthorized distribution–for example, over the Internet. Currently HDTV and other high-bandwidth content can be converted from analog to digital format and distributed widely. The MPAA wants to “plug” the analog hole by placing watermark detection capability in analogue-to-digital converters (ADCs), which convert analog audio and video into digital form.
– Adopted from the film technique of shooting a wide-screen image on a square 35mm frame, it’s the process of compressing wide-screen images to fit into the squarer standard 4:3 television signal. The images are then expanded for viewing in their original format on a wide-screen display device. Wide-screen or letterboxed DVDs that are not anamorphic have less detail when projected on a wide-screen monitor. In other words, a non-anamorphic wide-screen DVD is designed to be shown letterboxed on a standard “square” TV but appears with a black box all around the image when shown on a larger 16:9 wide-screen TV. To fill a 16:9 screen, a non-anamorphic DVD has to be blown up, resulting in loss of resolution and detail. Conversely, a DVD that is anamorphic, enhanced for 16:9, or enhanced for wide-screen delivers 33 percent more resolution than regular letterboxed transfers, is designed to be shown on a 16:9 TV, and does not need to be blown up. When one of these DVDs is shown on a “square” TV, it is often subject to anamorphic downconversion artefacts unless the TV has a vertical compression feature.
Anamorphic downconversion – Processing present in all DVD players that converts the image from an anamorphic DVD for display on a regular 4:3 TV. In the initial setup of a DVD player is a choice between a 16:9 or a 4:3 TV; the 4:3 options engage this processing, which often introduces artefacts such as jaggies and undulations during pans.
ANSI – American National Standards Institute, a professional measurements and standards group.
– Light-output specification set in 1993 used mainly to measure the brightness of front-projection televisions; more exact than undefined lumens. The average 7-inch, CRT front-projection television is capable of between 150 and 175 ANSI lumens, while 9-inch CRT sets emit between 200 and 240. DLP and LCD projectors range from 600 to 7,000, depending on the model.
– Any abnormality in a video image; typically results from digital processing, the interlaced-scanning method, the conversion from one video format to another, or signal transmission issues.
– Advanced Television Research Consortium, an organization of several large consumer electronics companies, research facilities, and broadcast entities that developed U.S. high-definition television (HDTV) standards.
– Advanced Television Systems Committee, a government-sanctioned, industry-led standard-setting body that adopted the official DTV standard for the United States in 1997. The acronym also refers to the DTV and HDTV standards.
– Advanced Television Enhancement Forum, a coalition of broadcasters as well as hardware and software makers that created a standard for interactive data broadcasting, most of which would be broadcast as part of HD transmissions. These standards are currently under consideration by Society of Motion Picture and Television Engineers (SMPTE). The group discontinued operations on November 1, 200