(1) (Fused Deposition Modeling) See 3D printing.
(2) (Frequency Division Multiplexing) Transmitting multiple data signals simultaneously over a single wire by using multiple carriers, each having a unique center frequency. Each data stream (text, voice, video, etc.) is placed into a separate carrier that is modulated by various methods (see modulation).
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.
(2) (Frequency Division Multiplexing) Transmitting multiple data signals simultaneously over a single wire by using multiple carriers, each having a unique center frequency. Each data stream (text, voice, video, etc.) is placed into a separate carrier that is modulated by various methods (see modulation).
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.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Let me say it again: Stop sharing music!
- They're being bankrupted because they choose......to be bankrupted. I believe both defendants are being offered manageable settlements to this day. Only their "principles" prevent them from doing so.When you don't like the price......of a product, that doesn't give you the right to steal it. Gee, I want a Ferrari...
- Discussion threads 2009-08-17
- Google Chrome already beating Opera
- Google Chrome already beating OperaWaiting for Windows Mobile 6 version... if they can create a version for Windows Mobile to rival safari on iPhone, they'll have me seriously thinking about it.Otherwise, it's just another browser for the desktop by another large conglomerate.Full screen problemI have my task bar on the...
- Discussion threads 2008-09-04
- Open Source Cars and More
- The Consumer Electronics Show CES might be in full throws this week, but some of the coolest devices may be found off the Net -- blueprints and all. A burgeoning trend in open source hardware is putting up some devices on the Web -- from machines that make anything...
- Blog posts 2008-01-06
- The Business Case for Information Management by Frank Buytendijk
- This second white paper by Frank Buytendijk describes, from an external market approach, what Information Management is, what the business cases for it are, and the value propositions of having a clear Information Management strategy to sustain the business. This is an excellent offer to lead with in an effort...
- White papers 2007-03-01
Premier Vendor Content Whitepapers, webcasts & resources from our Power Center Sponsors
- Learn more about tools to grow your business
-
The Business Essentials Guide provides you useful tools and templates to help grow your business and save you time with automated shipping solutions.
- Save time with the UPS Business Essentials Guide
- The best support in the Linux business
-
If Linux is going to power your mission-critical applications, you'd better have the best support known to business. Novell was rated the top provider of Linux technical support.
- Learn more >>
- The best support in the Linux business
-
If Linux is going to power your mission-critical applications, you'd better have the best support known to business. Novell was rated the top provider of Linux technical support.
- Learn more >>
- Reduce risk. Reduce complexity. Increase reliability.
-
A simplified IT environment isn't just less complex. It's also more reliable. Standardize on a single Linux platform with SUSE Linux Enterprise from Novell, and get the world's most interoperable Linux
- Learn more >>
-
-
Smart Tech
Expert advice on innovations in healthcare and the green technologies that make it happen.
Find out more
-
Smart Business
Discussion and advice on management issues that revolve around making your world smarter and more useful.
More Smart Advice
-
Smart People
The best and worst moves in the management and strategy trenches.
Learn More
