fiber type mismatch – A problem created by mismatching fiber core types, such as when connecting an SMF cable to an MMF cable.
FM (frequency modulation) – A method of data modulation in which the frequency of the carrier signal is modified by the application of the data signal. frequency – The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest amplitude, and back to its starting point over a fixed period of time, expressed in cycles per second, or hertz (Hz). GBIC (Gigabit interface converter) – A standard type of modular interface designed in the 1990s for Gigabit Ethernet connections. __s may contain RJ-45 or fiber-optic cable ports (such as LC, SC, or ST). They are inserted into a socket on a connectivity device's backplane. Gigabit Ethernet – A type of Ethernet network that is capable of 1000-Mbps, or 1-Gbps, through put. Requires Cat 5e or higher cabling. hot-swappable – The feature of a component that allows it to be installed or removed without disrupting operations. impedance –T he resistance that contributes to controlling an electrical signal. _______ is measures in ohms LC (local connector) – The most common 1.25-mm ferrule connector, which is used with single- mode, fiber-optic cable. LED (light-emitting diode) – A cool-burning, long-lasting technology that creates light by the release of photons as electrons move through a semiconductor material. light meter –( See OPM.) line tester – (See cable performance tester). media converter – A device that enables networks or segments running on different media to interconnect and exchange signals. mini GBIC –( See SFP) MMF (multimode fiber) – A type of fiber-optic cable containing a core that is usually 50 or 62.5 microns in diameter, over which many pulses of light generated by a laser or light emitting diode (LED) travel at different angles. modal bandwidth – A measure of the highest frequency of signal a multimode fiber-optic cable can support over a specific distance. __ is measured in MHz-km. modem – A device that modulates digital signals from a computer into analog signals at the transmitting end for transmission over telephone lines, and demodulates analog signals into digital signals at the receiving end so a computer can read the received transmission.
modulation – A technique for formatting signals in which one property of a simple carrier wave is modified by the addition of a data signal during transmission. MT-RJ (Mechanical Transfer-Registered Jack) – The most common type of connector used with multimode fiber-optic cable. multimeter – A simple instrument that can measure multiple characteristics of an electric circuit, including its resistance, voltage, and impedance. multiplexer (mux) – A simple instrument that can measure multiple characteristics of an electric circuit, including its resistance, voltage, and impedance.
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- Winter '16
- Vocabulary Terms, Coaxial cable, fiber-optic cable, Physical layer standard