(electronics) A plug and socket for interconnecting coaxial cables; commonly used to interconnect television receivers, videocassette recorders, and cable or antenna sources.
F connector
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(′ef kə′nek·tər)
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A two-wire (signal and ground) coaxial cable connector used to connect antennas and set-top boxes to TVs, VCRs and DVDs. F connector cables typically carry analog NTSC TV signals, and the plug's socket is easily identified because it is threaded. Plugs come threaded and unthreaded, both of which fit the threaded socket. See A/V ports and plugs & sockets.
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This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (June 2007) |
The F connector is a common means of connecting television signals. It is a type of coaxial RF connector commonly used for "over the air" terrestrial television, cable television and universally for satellite television and cable modems, usually with RG-6/U cable or, in older installations, with RG-59/U cable. It was invented by Eric E. Winston in the early 1950s while working for Jerrold Electronics on their development of cable television. In the 1970s it became commonplace on VHF television antenna connections, as coaxial cables replaced twin-lead, and later for UHF also.
The F connector is inexpensive, yet has good 75 Ω impedance match up to 1 GHz and has usable bandwidth up to several GHz. One reason for its low cost is that it uses the solid conductor (center wire) of the specified types of coaxial cable as the pin of the male connector. This design is subject to the surface properties of the inner conductor (which must be solid wire) and is not corrosion resistant, hence water proof versions are needed for outside use (for example, on aerials). The male connector body is typically crimped, or sometimes screwed, onto the exposed outer braid. The cable industry standard now is to use compression fittings. Female connectors have a 3/8-32 UNEF thread (9.525mm diameter). Most male connectors have a matching threaded connecting ring, though push-on versions are also available. Push-on F connector ends provide poor shielding against airborne signals (e.g., a nearby TV transmitter will interfere with a CATV station).
It is suitable for domestic terrestrial, cable, and satellite TV installations and offers significant improvements over the Belling-Lee connector used on European terrestrial receivers. It requires slightly more care to properly install the male connector to the cable than with Belling-Lee type and attention should always be paid to the quality of the connector and matching with the cable size.
References
- “F” Port (Female Indoor) Physical Dimensions, ANSI/SCTE 02 1997 (see www.scte.org).
- International standard IEC 60169-24: Radio-frequency coaxial connectors with screw coupling, typically for use in 75 Ω cable distribution systems (Type F). (non-free content)
See also
External links
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