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Topic: Transmission medium


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In the News (Thu 21 Aug 08)

  
  Medium - Wikipedia, the free encyclopedia
In astronomy, the interplanetary medium or the interstellar medium.
The medium of instruction is the language used to teach in.
In parapsychology, a spiritual medium is a person who claims to serve as an intermediary between the living and the dead.
en.wikipedia.org /wiki/Medium   (387 words)

  
 Ideal and non-ideal transmission medium   (Site not responding. Last check: 2007-11-06)
So far, the transmission medium has been considered ideal, because the variations in the mechanism are identically replicated along the medium.
For the non-ideal medium, the variations are not identically replicated.
Transmission mediums can be non-ideal because they are subject to noise.
www.cs.mu.oz.au /353/notes/node33.html   (176 words)

  
 [No title]
The Transmission Medium could be a pair of electrical conductors with the stressed property being the potential difference (the voltage) between the conductors, an electrical transmission line.
The Transmission Medium could be a sheet of writing paper with the stressed property being the light-dark pattern on the paper, a letter.
The Transmission Medium could be a cylindrical glass tube with the stressed property being the intensity of light in the tube, a fiber optic cable. The Source can have a disturbance to the Transmission medium generated in sympathy to the Information, that is, generate a disturbance which varies in time exactly as the Information.
www.telebyteusa.com /foprimer/FOPRIMER.DOC   (20951 words)

  
 Decentralized data transmission system - Patent 4227178
Transmission medium 1 is a very high speed line such as a coaxial cable allowing a transmission speed of 8 megabits/sec approximately, to be used.
It is obvious that if the number of the stations connected to transmission medium 1 or the number of the terminals connected to the station exceeds 2.sup.8 =256 (a character including 8 bits), two characters or more would have to be provided for identifying the station or the terminal connected to said station.
This bit pattern continuously transmitted on the transmission medium, is superposed on the data signals issued from the transmission stations or on the addressing signals issued from the monitoring station.
www.freepatentsonline.com /4227178.html   (6475 words)

  
 Encyclopedia: Transmission medium   (Site not responding. Last check: 2007-11-06)
In communications, transmission is the act of transmitting electrical messages (and the associated phenonomena of radiant energy that pass through media).
The word medium has a number of uses:ukahsbd The most common meaning of the word medium is an average or mean in a range of sizes or conditions.
Transmission media can be classified in two kinds: guided (or bounded) media in which waves are guided along a solid medium, and wireless (or unguided) media in which transmissions and receptions are achieved by means of an antenna.
www.nationmaster.com /encyclopedia/Transmission-medium   (507 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
In character transmission systems the time interval between the end of the last bit of a character and the beginning of the next character is either zero or a whole multiple of the time required to transmit a complete character.
Transmission control characters are used for two purposes: to control the flow of data in the communication system to frame a message into a recognisable format by the receiver Flow control is necessary to prevent messages being sent when the receiver is not ready to receive them.
Class B: Medium number of networks, each with a medium number of hosts Class C: Many networks, each with a few hosts IP addresses are normally written in what is called dotted decimal notation, with a decimal number representing each of the octets of the 32-bit address.
www.dcs.napier.ac.uk /~jose/CS/Notes02.doc   (11663 words)

  
 Chapter 2 Page 1 - Telecommunications Handbook for Transportation Professionals
Transmission systems are those elements (hardware and software) that provide management of the communication process and the use of the transmission path.
Transmission efficiency is generally viewed as the amount of signal degradation created by the use of a particular transmission medium.
Transmission over fiber optic strands requires repeating (or regeneration) at varying intervals.
www.ops.fhwa.dot.gov /publications/telecomm_handbook/chapter2_01.htm   (5369 words)

  
 c367ch14
Transmission medium is a branching cable with no closed loops.
A transmission from any station propagates throughout the medium and can be received by all other stations.
A transmission from any one station is received by the hub and retransmitted on all of the outgoing lines.
business.usi.edu /aforough/cis367notesf2003/c367ch14.htm   (1471 words)

  
 CPCS 353
Delay distortion is a phenomenon peculiar to guided transmission media where distortion is caused by the fact that the velocity of propagation of a signal through a guided medium varies with frequency.
Transmission is the communication of data by the propagation and processing of signals.
Broadcast radio The principal difference between this transmission medium and microwave is that the former is omnidirectional and the latter is directional.
pages.sbcglobal.net /icruz/html/school/CPSC353   (3946 words)

  
 ANSDIT - The letter "T"
A given data medium may be formatted with multiple parallel tracks, such as in concentric circles on a magnetic disk or a single track such as a continuous spiral as typically used on optical disks.
Track may refer to a representation medium that contains references to the animation data, that may be stored as images or sounds on hard disks, floppy disks, compact disks, or other devices.
A transmission channel may be provided, for example, by frequency division multiplexing or time division multiplexing.
www.ncits.org /tc_home/k5htm/t2.htm   (2221 words)

  
 Transmission medium - Wikipedia, the free encyclopedia
A transmission medium is any material substance which can propagate waves or energy.
Sound is by definition the vibration of matter, and so does require a physical medium for transmission, as does heat energy.
Guided (or bounded) - Waves are guided along a solid medium such as a transmission line.
en.wikipedia.org /wiki/Transmission_medium   (227 words)

  
 Primer on Premises Data Communications
This propagation of a disturbance by the Transmission Medium is illustrated in Figure 1-5.
The Transmission Medium could be a cylindrical glass tube with the stressed property being the intensity of light in the tube, a fiber optic cable.
In any case, a Transmission Medium has a transfer function and the frequency spread of this transfer function is measured by the bandwidth.
www.telebyteusa.com /foprimer/fofull.htm   (12332 words)

  
 Method and system for modeling aggregate multimedia traffic within a shared transmission medium - Patent 5886907
The method for modeling aggregate multimedia traffic within a shared transmission medium according to claim 1 wherein said step of determining values for average and mean sojourn times for each type of service comprises the step of modeling each constant bit rate service as a renewal process.
The method for modeling aggregate multimedia traffic within a shared transmission medium according to claim 1 wherein said step of determining values for average and mean sojourn times for each type of service comprises the step of modeling each variable bit rate service as a multistate modulated discreet process.
The system for modeling aggregate multimedia traffic within a shared transmission medium according to claim 11 wherein said means for modeling each variable bit rate real-time service as a multistate modulated discreet process comprises means for modeling each variable bit rate real-time service as a multistate modulated discreet process including an OFF state.
www.freepatentsonline.com /5886907.html   (3721 words)

  
 美国专利申请公开说明书 20020041042 - Method and apparatus for manufacturing plastic optical transmission ...   (Site not responding. Last check: 2007-11-06)
The present invention relates to a method and apparatus for manufacturing plastic optical transmission medium.
The subject method and apparatus can produce a variety of optical transmission medium, including for example, graded refractive index polymer optical fiber, graded refractive index rod lens, and step index polymer optical fiber.
The subject optical transmission medium have improved characteristics and efficiency, due, at least in part, to better control of the profile of the refractive index distribution and stable high temperature operation of the medium.
cxp.paterra.com /uspregrant20020041042cn.html   (140 words)

  
 Medium Voltage Transmission -
varies the voltage, the variation in voltage propagates along the transmission medium (which may be...
second half of the story is the transmission and distribution of power—actually moving the...
The high and medium voltage power network comprises a large number of components, such as circuit breakers, cables, trans-formers and gas-insulated switchgear.
voltage.faasv.com /index.php?k=medium-voltage-transmission   (1019 words)

  
 Device for excellently coupling a laser beam to a transmission medium through a lens - Patent 4281891
In an optical communication system, an optical fiber is used as a transmission medium for transmitting a laser beam that carries information to be transmitted.
Speaking generally of the semiconductor laser elements, it is very often desirable that a laser beam emitted by such a laser element be coupled to a transmission medium through a lens.
It is another primary object of this invention to provide a device for coupling a laser beam to a transmission medium through a lens, which device is compact and convenient to handle.
www.freepatentsonline.com /4281891.html   (4643 words)

  
 [No title]
In its simplest form, a transmission from one station is broadcast to and received by all other stations.
MAC: Since all devices must share the network’s transmission capacity, some means of controlling access to the transmission medium is needed to provide for an orderly and efficient use of that capacity.
For a passive tap, the tap extract a portion of the optical energy from the bus for reception and it injects optical energy directly into the medium for transmission.
www.cs.sfu.ca /CC/371/elo/Notes/Chapter13.doc   (3567 words)

  
 [No title]   (Site not responding. Last check: 2007-11-06)
Transmission may be simplex, half-duplex, or full-duplex Transmission media may be classified as guided or unguided.
The term direct link, also known as data link, is used to refer to a transmission path in which signals propagate directly from transmitter (sender) to receiver with no intermediate devices, other than amplifiers or repeaters used to increase signal strength.
A guided transmission medium is point-to-point if it provides a direct link between two devices, and those are the only two devices sharing the medium.
www.dcs.napier.ac.uk /~jose/CS/Transp02.ppt   (2430 words)

  
 Transmission medium Article, Transmissionmedium Information   (Site not responding. Last check: 2007-11-06)
A transmission medium is any material substance, such as fiber-optic cable, twisted-wire pair, coaxialcable, dielectric -slab waveguide, water, and air, that can be used for the propagation of signals, usually in the form of modulated radio, light, or acoustic waves, from one point to another.
Note: By extension, freespace can also be considered a transmission medium for electromagnetic waves,although it is not a material medium.
transmissin medium, material, transmissionmedium, one, transmission meduim, modulated, transmission medium, light, trasmission medium, source, transmissino medium, standard, transmission edium, considered, transmision medi...
www.anoca.org /waves/material/transmission_medium.html   (130 words)

  
 Networks
First the communications channels, the transmission medium that the data is transferred over.
The transmission medium consists of materials or techniques capable of carrying a signal.
Wireless transmission medium that distributes radio signals through the air over long distances such as between cities, regions, and countries.
www.cs.montana.edu /hunterl/spring02/networks.html   (1297 words)

  
 Man-Trans.com Call us Toll Free 1-877-626-8726 -   (Site not responding. Last check: 2007-11-06)
We will custom build any configuration of a transmission for you.
We also stock a large selection of transmission parts.
All of our builders are highly trained in manual transmission remanufacturing.
www.manual-transmission.com   (148 words)

  
 Transmission Media (SAP Library - Message Control (CA-GTF-BS))   (Site not responding. Last check: 2007-11-06)
The transmission media determine the type of processing.
Table TNAPR contains information about which processing programs should be transferred for the relevant transmission medium for the dispatch of the message.
Messages which are to be sent as mails are linked with a program which calls the Business Communication Interface.
help.sap.com /saphelp_46c/helpdata/en/c8/19889543b111d1896f0000e8322d00/content.htm   (164 words)

  
 Fleet Owner: Simply automatic - Eaton Corp. offers new fully automatic medium-duty transmission - Brief Article - ...   (Site not responding. Last check: 2007-11-06)
The "2-pedal" design, 6-speed transmission, which has no clutch pedal, is aimed at medium-duty applications.
Building on the company's "3-pedal" design AutoShift medium- and heavy-duty transmissions, the foundation of the new automatic is the Eaton Fuller FSO Series manual gearbox.
To create the automatic, Eaton removed the manual unit's synchronizers and added an electronic control unit (ECU) that enables communication between the engine and transmission via an SAE J1939 data link.
www.findarticles.com /p/articles/mi_m3059/is_5_96/ai_75960154   (311 words)

  
 broadband » News » 100Mbps Via Mammal - Skin as a transmission medium
A German Startup has created an alternative to RFID and bluetooth that uses human skin as a transmission medium.
And you thought cellphone transmissions might be hazardous to your health.
Of course, this is a different idea than just measuring the resistance of your body to estimate body fat content, but the basic idea of the human body as a transmission medium for electric current is not a new one.
www.broadbandreports.com /shownews/51168   (1188 words)

  
 Transmission medium -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-11-06)
Transmission medium -- Facts, Info, and Encyclopedia article
Note: By extension, (Click link for more info and facts about free space) free space can also be considered a (Communication by means of transmitted signals) transmission (A means or instrumentality for storing or communicating information) medium for electromagnetic waves, although it is not a material medium.
Source: From (Click link for more info and facts about Federal Standard 1037C) Federal Standard 1037C
www.absoluteastronomy.com /encyclopedia/t/tr/transmission_medium.htm   (71 words)

  
 Method for monitoring, by means of a monitoring device, a downstream transmission medium containing a multiplicity of ...
Method for monitoring, by means of a monitoring device, a downstream transmission medium containing a multiplicity of virtual, asynchronously time-shared transmission channels (EP0416685B1)
Method for monitoring, by means of a monitoring device, a downstream transmission medium containing a multiplicity of virtual, asynchronously time-shared transmission channels
Method and apparatus for admitting data to a digital telecommunications network having regulated access
www.delphion.com /details?pn=EP00416685B1   (94 words)

  
 [No title]
¡’’ó1(Ÿ¨'Effect of imperfect transmission medium¡(($ó(#Ÿ¨(Transmission medium: Two-wire open lines¡))$ó%!Ÿ¨(Transmission medium: Two-wire open lines¡))$Ÿ¨ÈSimplest transmission medium.Each wire is insulated from the other and both are open to free space.
Disadvantages: slow, high-speed transmission causes interference (crosstalk)¡XXªM ó&"Ÿ¨ Coaxial Cableó+%Ÿ¨ Coaxial CableóŸ¨ Coaxial Cable¡$Ÿ¨°A transmission medium consisting of thickly insulated copper wire, which can transmit a large volume of data than twisted wire.
Advantages: It is often used in place of twisted wire for important links in a network because it is a faster, more interference-free transmission medium (speed: 200 megabits per second).
grail.cba.csuohio.edu /~sanchita/transmedia.ppt   (1328 words)

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