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QAM is used in a variety of communications systems such as Dial-up modems and WiFi. In cable systems, a QAM tuner is linked to the cable in a manner that is equivalent to an ATSC tuner which is required to receive over-the-air (OTA) digital channels broadcast by local television stations when attached to an antenna. Most new HDTV digital ...
Customers were increasingly interested in more channels, pay-per-view programming, digital music services, and high speed internet services. By 2000, most cable providers in the US were offering some form of digital cable TV to their customers. Digital cable technology has allowed cable providers to compress video channels so that they take up ...
Today, technologies for broadband digital video signal transmission such as LVDS are also used in vehicles, in which the signal transmitted as a differential signal helps for EMC reasons. However, high-quality shielded twisted-pair cables must be used together with elaborate connector systems for cabling. An alternative is the use of coaxial ...
A coaxial cable used to carry cable television onto subscribers' premises A set-top box, an electronic device which cable subscribers use to connect the cable signal to their television sets. Presented unit is a Cisco RNG200N for QAM digital cable television system used in North America.
A mixer in the dish-end equipment (an LNB or distribution unit) converts the received signal to the correct user band IF centre frequency for that receiver. [3] The converted transponders of the various users are then combined, and sent via the single coaxial cable to the receivers. The combined signal is tapped or split to reach every user.
There are two coaxial cables at the CMTS for each node: one for the downstream (download speed signal), and the other for the upstream (upload speed signal). [3] The CMTS then connects to the ISP's IP (Internet Protocol) network. [4] Downstream, the direction toward the user, bit rates can be as high as 1 Gbit/s. [5]
Cable-ready is a designation which indicates that a TV set or other television-receiving device (such as a VCR or DVR) is capable of receiving cable TV without a set-top box. [ 1 ] The term originated with analog TV , which uses different frequencies for cable versus over-the-air .
In telecommunications, signal reflection occurs when a signal is transmitted along a transmission medium, such as a copper cable or an optical fiber.Some of the signal power may be reflected back to its origin rather than being carried all the way along the cable to the far end.