Hardware: Cable converter box

I had find many products about Antenna TV Cable from some websites such as

	SC-SC patch cord 1) Fiber mode: single mode, multiple mode 2) Type: FC / SC / ST / LC / MU / MTRJ / SMA / D4 / DIN.. LC to LC Patch Cord Country of Origin: China (mainland) Brand Name: FiTek Chat with supplier using: Specifications

SC-SC patch cord

1) Fiber mode: single mode, multiple mode 2) Type: FC / SC / ST / LC / MU / MTRJ / SMA / D4 / DIN..

LC to LC Patch Cord

Country of Origin: China (mainland) Brand Name: FiTek Chat with supplier using: Specifications

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It has been suggested that this article or section be merged into Set-top box. (Discuss)

Pace Micro Technology DC757X HD cable box
A cable converter box or television converter box is a set-top 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. The device allows a television set that is not 鎻穉ble 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, but these do not include advanced capabilities such as descrambling or digital downconversion.
The task of a cable box is to convert a television channel from those transmitted over the CATV wire.
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.
Typically, a cable converter box has two coaxial F-type female connectors; one "Cable In" for a coaxial cable from the wall jack (containing the CATV signal), and one "TV Out" connected to the television where an antenna or other RF device (such as a VCR) would be connected. Newer cable boxes also tend to come standard with RCA jacks for composite video and stereo audio. More advanced devices may have s-video and/or HDMI outputs.
In early days, before televisions came standard with 75? coaxial antenna connectors, cable boxes came with adapters that would allow the coaxial cable connect to the 300? twin lead screws used with traditional antennas.
Major manufacturers of cable boxes have included Jerrold Electronics, General Instruments (which Jerrold merged into), Scientific Atlanta, and Motorola (which General Instruments merged into).
Contents
1 Descrambling
2 Addressable cable box
3 Digital conversion
4 Other cable box services
5 Future of cable boxes
6 Cable terms: Basic, Premium, Pay Per View Services
7 References
8 See also
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Descrambling
A descrambler is a device that unscrambles the encoded signal and restores the picture and sound of a scrambled channel.
Typical modern cable boxes include some form of descrambling ability. Such a cable box must also be addressable (see below) in order to be told to descramble the signal for a given channel. Early electronic cable boxes, for example, could descramble channels that used inversion as a scrambling method.
In many markets, carriers provided devices with simple or no descrambling capability, although the carrier may use different forms of scrambling for different premium channels. Certain premium channels or services could require an upgrade to a more advanced converter box that was capable of the necessary descrambling method. This is less true in the era digital cable and cheap consumer electronics.
When a descrambler is included in a cable converter box, it is sometimes referred to as a converter/descrambler, or combination unit.
Addressable cable box
An addressable cable box is one that can be controlled by the local cable company. Addressability is the process by which (optionally encrypted) messages are sent from the cable provider for a particular cable box via the cable signal....(and so on)