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The F connector 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.
The F connector is inexpensive, yet has good 75-ohm impedance match up to 1 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. While lowering cost, this design drastically reduces the long-term reliability compared to other connectors, as the copper wire is extremely prone to damage upon insertion and corrosion. The male connector body is typically crimped, or sometimes screwed, onto the exposed outer braid; however, crimping creates signal loss and a poor connection. The cable industry standard now is to use pressurized fittings. Female connectors have a 3/8-32 thread. 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).
[edit] References
- “F” Port (Female Indoor) Physical Dimensions, ANSI/SCTE 02 1997 (see www.scte.org).
[edit] See also
[edit] External links
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Audio and Video Connectors |
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| Single conductor |
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| Analog audio |
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| Digital audio |
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| Video |
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| Audio and Video |
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