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"F",
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"H",
"I",
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"L",
"M",
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'Fa' to 'Fid', 'Fie' to 'Flh', 'Fli' to 'Fq', 'Fr' to 'Fre', 'Fro' to 'Fz',
FACTOR. Any of the elements, quantities, or symbols that, when multiplied together, form a product.
FAILSAFE. Built-in safety characteristics of a unit or system so that unit or system failure or a loss of
control power will not result in an unsafe condition. The design feature of a part, unit or equipment which allows the item to fail only into a non-hazardous mode.
| FAN. A component designed to move air. A set of axial fans are shown to the right, plastic box type. Fan Manufacturers. Fans may be operated of either AC or DC voltage, each has its own befits or pitfalls. |
 Fans |
FANOUT. The number of IC gates an Integrated circuit can drive is determined by the current it can source and sink. Expanded FanOut definition.
FARAD. The basic unit of capacitance. A capacitor has a capacitance of 1 farad when a voltage potential of 1 volt across it produces a charge of 1 coulomb. [Dictionary of Capacitor Terms]
FARADAY ROTATION. The rotation of the plane of polarization of electromagnetic energy when it passes a substance influenced by a magnetic field that has a component in the direction of propagation.
FARADAY SHIELD. A common conductor connection at one end to provide electrostatic shielding without effecting electromagnetic waves. The common point connection is normally grounded. An example Graphic of Faraday Shielding
FAST BUS. IEEE Std 960-1993, FastBus Defined the Mechanical, Electrical, and Protocol for a board-to-backplane interface. This interface is obsolete.
FAST-TIME-CONSTANT CIRCUIT. Differentiator circuit in the first video amplifier that allows only the leading edges of target returns, no matter how small or large, to be used.
FAULT INDICATOR. A component or device that indicates a failure or defect in the equipment being monitored either by audio or visual indication.
Fault Indicator
FDDI. Fiber Distributed Data Interface is a Local Area Network [LAN] using Fiber-Optic cable in a Dual Token Ring topology. FDDI is defined in ISO 9314-1/2/3.
Feed-Thru Capacitor. A bulk-head mount filter used to pass signals into an enclosure. The most common filter element is a shunt capacitor. Read more on Feed-Thru Capacitors showing different styles.
FEP. Fluorinated Ethylene Propylene, A synthetic type of insulation.
FERRITE. A powdered and compressed ferric oxide material that has both magnetic properties and light resistance to current flow.
FERRITE SWITCH. A ferrite device that blocks the flow of energy through a waveguide by rotating the electric field 90 degrees. The rotated energy is then reflected or absorbed.
FERROMAGNETIC MATERIAL. A highly magnetic material, such as iron, cobalt, nickel, or their alloys.
FERRULE. A short metal tube used to make crimp connections to shielded or coaxial cables. The cylindrical metallic ends of a cartridge fuse or wire. Definition of a Ferrule and Manufacturers of Ferrules
Fiber Optic Cable. A fiber, multiple fiber or fiber bundle in a cable structure fabricated to meet optical mechanical and environmental specifications.
Fiber Optic Connector. A fiber optic component normally assembled onto a cable and attached to a piece of apparatus for the purpose of providing interconnecting/disconnecting of fiber optic cables.
| FIBER OPTICS. Conductors or optical waveguides that readily pass light. Fiber Optic Connector Manufacturers. Also refer to Fiber Optic Connector, or Fiber Optic Cable. |
 Optical Fiber |
FIBROUS BRAID. An outer covering used to protect a conductor’s insulating material. Commonly made from cotton, linen, silk, rayon, or fiberglass. Cable braid is also made off metal and used as a conductor shield or signal conductor. Also refer to Cable Armor
FIDELITY. The faithful reproduction of a signal. The accuracy with which a system reproduces a signal at its output that faithfully maintains the essential characteristics of the input signal.
Next set of "F" Terms and definitions
