单词	fdm
释义	fdm fdm abbreviation for (Telecommunications) frequency-division multiplex. See multiplex FDM FDM (communications) frequency-division multiplexing FDM (1) (Fused Deposition Modeling) See 3D printing. (2) (Frequency Division Multiplexing) Transmitting multiple data signals simultaneously over a single channel. Each data stream (text, voice, video, etc.) is modulated onto a carrier with a unique center frequency by the multiplexor and demodulated at the receving end (see modulation and carrier). FDM works in both wired and wireless applications (see FDMA). It Started in the 1930s In the 1930s, the telephone companies began to use FDM to combine multiple analog voice signals over one line to maximize efficiency of their long distance trunks. During the 1960s, FDM was replaced with TDM, its digital counterpart (see TDM and channel bank). Cable TV companies use FDM to transmit hundreds of channels of analog and digital TV as well as Internet over a single coaxial cable. The set-top box or TV tuner locks onto a particular frequency (channel) and demodulates the carrier to derive the data for the TV screen. The cable modem both modulates and demodulates the appropriate carriers to provide bi-directional operation for Internet access. See FDMA, OFDM, circuit switching and WDM. Analog FDM vs. Digital TDM FDM separates signals by using different carrier frequencies, whereas TDM (time division multiplexing) interleaves signals as in the following illustrations. MedicalSeeTDMLegalSeecarrierFinancialSeeBroadband FDM Acronym Definition FDM➣Fused Deposition Modeling FDM➣Formal Development Methodology FDM➣Finite-Difference Method FDM➣Forenede Danske Motorejere FDM➣Feature Download Management FDM➣Free Download Manager FDM➣File Diagnostic Messages FDM➣Fast Diagnostic Mode FDM➣Fifo Data Manager FDM➣Full Duplex Mode FDM➣Flex Digital Magnifier FDM➣Frequency Division Multiplexing FDM➣Forex Dealer Member FDM➣Frequency Division Multiplex(ing) FDM➣Fuzzy Decision Making FDM➣Foundation for Decision Making FDM➣Flight Dynamics Model FDM➣Flight Data Monitoring FDM➣Fachverband des Maschinen (German wholesale machine association) FDM➣Fugitive Dust Model FDM➣Farallon de Medinilla (Northern Mariana Islands) FDM➣Français du Monde (French: French of the World; political group) FDM➣Formes de la Mobilité (French: Forms of Mobility) FDM➣Financial Data Management FDM➣France Danemark Matériel (French industrial equipment company) FDM➣Functional Data Model FDM➣Freiburger Zentrum für Datenanalyse und Modellbildung (Germany) FDM➣Flash Disk Module FDM➣Frequency Domain Multiplexing FDM➣Furniture Design and Manufacturing (magazine) FDM➣Feature Difference Measure FDM➣Fashion Design and Merchandising FDM➣Fuel Delivery Module (automotive) FDM➣Flash Data Memory FDM➣Financial Data Mart FDM➣Française des Montages (French: French Montages) FDM➣Filter Diagonalization Method FDM➣Facilities Development Manual FDM➣Financial Decision Making FDM➣Fundamentals of Disaster Management FDM➣Front Desk Manager FDM➣Fiveash Data Management Inc FDM➣Foreign Domestic Movement FDM➣Financial Data Manager (Oracle) FDM➣Frederick Douglass Museum FDM➣Fused Deposition Manufacturing FDM➣Façades Distribution Méditerranée (French building facade company) FDM➣Freeze Dried Mealworms FDM➣Financial Disclosure Management (US Army on-line computer program) FDM➣Functional Data Manager FDM➣Form Deprivation Myopia FDM➣File Distribution Manager FDM➣Feature Design Memorandum (USACE) FDM➣Formulaire de Demande FDM➣Family Decision Meeting (Oregon Department of Human Services) FDM➣Facilities Design and Management (magazine) FDM➣Frequency Domain Modulation FDM➣Flexor Digiti Minimi FDM➣Faute de Mieux (French) FDM➣Family Development and Management FDM➣Flight Data Manager FDM➣Fine Design Marine FDM➣Fat Content in Dry Matter FDM➣Florida Disaster Management FDM➣Farmer Direct Marketing FDM➣Froid des Mascareignes (cold storage company) FDM➣Flash Development Module FDM➣Feasibility Demonstration Models FDM➣Fame Data Management FDM➣File Diagnostic Message FDM➣Fat Dog Mendoza (cartoon network show) FDM➣Football Dot Manager (online game) FDM➣Functional Document Model FDM➣Friends of the Divine Master FDM➣Force Direction Message FDM➣Fill and Drain Module FDM➣Fourier Decomposition Method FDM➣Forging Design Manual (aluminum) FDM➣Fault Detection and Management FDM➣Flexible Delivery Mode (teaching method) FDM➣Feedback Data Management FDM➣Fondation des Deserts du Monde FDM➣Fables Device Manufacturer FDM➣Fixed Dose Method FDM➣Figure of Demerit FDM➣Failure Detector Module FDM➣Free-Flying Dynamic Models FDM➣Food Drug Mass-Merchandise (market segment) FDM➣Full Drive Modulation FDM➣Frequent Dancer Miles FDM➣Force Distribution Manual FDM➣Factory Data Management FDM➣Fusion Data Management (Unreal tournament clan) FDM➣Fraction of Deadlines Made FDM➣Fundación Diálogo Mujer (Spanish: Foundation for Women's Dialogue; Colombia) ThesaurusSeemodulation
随便看	low-performance drone low performing state low-period coplanar electromagnetic bandgap low peritonitis occurrence group low permeation low phase noise low phase noise oscillator low-phase-noise voltage controlled oscillator low phosphate low-phosphate-dependent invasion low phytic acid lowp(i) low pick up low pim switch unit low pin count low pitch low-pitched low-pitchedly low-placed conus medullaris low plasticity burnishing low platelets low platform trailer low pmepr low point low polarization dependent loss

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