A cable converter box or television converter box is an electronic tuning device that transposes/converts any of the available channels from a cable television service to an analog RF signal on a single channel, usually VHF channel 3 or 4, or to a different output for digital televisions such as HDMI. The device allows a television set that is not “cable ready” to receive cable channels. While later televisions were "cable ready" with a standard converter built-in, the existence of premium television (aka pay per view) and the advent of digital cable have continued the need for various forms of these devices for cable television reception. While not an explicit part of signal conversion, many cable converter boxes include forms of descrambling to manage carrier-controlled access restriction to various channels.
Cable-ready televisions and other cable-aware A/V devices such as video recorders can similarly convert cable channels to a regular television set, but these do not include advanced capabilities such as descrambling or digital downconversion.
The basic converter box is passive and does not communicate back to the carrier. It simply tunes to one of the channels being transmitted together over the wire and re-transmits it to a television or other video device on a standard broadcast frequency (usually a customer-selected, locally unused frequency between VHF 2 and 4). Like other set-top boxes, converter boxes usually provide multiple options for the output channel (either 2/3 or 3/4) so that the same box can be used, with simple configuration, in multiple television markets. Despite not having a broadcast reception television antenna, a strong local television station can cause interference with the TV's reception of the cable converter's signal, resulting in undesired static or ghosting.
Later cable boxes became addressable, allowing the carrier to independently identify one cable box from another. In early systems, this permitted the carrier to send instructions to the boxes by addressing them over the wire. This allowed customers to subscribe to premium television and pay-per-view. More recent cable boxes, particularly those for digital cable, engage in two-way communication with the carrier central office, allowing for more advanced and interactive features.off fashion trending shoes for girls number trends lifestyle face fashion august 2018 astronomy places heart haircut hair shop east haircut plus 80 s haircut end trend astrologist definition what's in coffee coffee tables target coffee at home gtp and gdp form what in krebs 2018 memes are bad what to wear to a wedding 4 haircut trend car coffee beans and brew punjabi style of wearing dupatta trend no who said champagne wishes and caviar dreams parker county coffee company john haircut science all astronomy net can i have coffee fashion was here july astronomy science men judgmental overconfidence electronics primer auriga constellation brightest star astronomy tool sumika music video europe hair trend 2018 2019 who is science beauty salon south miami coffee table with storage by style lounge salon lifestyle app by lifestyle fashion yourself lost and wander poppy dress trending videos in youtube names of stars in the milky way