multiplexer


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Related to multiplexer: Demultiplexer, Analog Multiplexer

multiplexer

[′məl·tə‚plek·sər]
(electronics)
A device for combining two or more signals, as for multiplex, or for creating the composite color video signal from its components in color television. Also spelled multiplexor.

Multiplexer

 

in telegraphy, a switching device that is used to reduce the number of telegraph transmitters in a telegraph office as compared with the number of incoming communication lines. A distinction is made between manual and automatic multiplexers. They are used on lightly loaded lines, where the daily traffic does not exceed 30-80 telegrams.

The main element of a multiplexer is a switch, whose handle may be set in three positions: the horizontal (off) position; the upper position, which connects one telegraph transmitter to a communications line; and the lower position, which connects the other telegraph transmitter. The number of switches in a multiplexer is equal to the number of communications lines. Each switch is connected to its own communications lines, and all switches are connected to two telegraph transmitter stations for receiving and transmitting telegrams through the lines.

Upon receiving a call signal from the city communications office, the telegraph operator moves the handle of the switch located under the lighted signal to, for example, the upper position (thus connecting the first of two telegraph transmitter stations). If a call is received from another city communications office while the first transmitter station is still in operation, the telegraph operator moves the handle of the appropriate switch to lower position, thus connecting the second station. After completion of transmission or reception of a telegram the switches of the multiplexer are moved to the horizontal position.

V. V. NOVIKOV

multiplexer

References in periodicals archive ?
In this case, control over the Multiplexer becomes a very simple task: Defining the channel to be selected.
By applying this method, the equation of 2-to-1 multiplexer is defined as follows:
Highlighting on Multiplex Restoration Scheme in Optical Cross add and Drop Multiplexer (OXADM).
Chang, "Microstrip Multiplexer with Four Channels for Broadband System Applications," International Journal of RF Microwave CAE, Vol.
The ODSI protocol - expected to enter the market early 2001 - sets up an interface to an optical network, whereby routers, SONET/SDH multiplexers and ATM switches can dynamically request bandwidth provisioning from the optical network.
The integral two channel time division multiplexer cuts user costs by permitting two data terminals to communicate over a single leased telephone line.
* For 100BaseT and AFDX applications, configuration as a 16:1 multiplexer with the capability to reverse the transmit and receive pair for simulating a crossover cable connection.
The multiplexer features redundant power supply and secondary link options, which provide backup via automatic switchover, improving the reliability of the system.
You'll need: TM 11-5820-890-10-8, SINCGARS Operator's Manual; TM 11-5820-890-23P, Unit and Direct Support Maintenance Repair Parts and Special Tools List for FHMUX TD-1456/VRC and Mount MT-6845/VRC; SB 11-131-2, Supply Bulletin Vehicular Sets and Authorized Installations, VOL II, SINCGARS, FHMUX, and EPLRS; TM 11-5820-890-30-6, Direct Support Maintenance Instructions for the TD-14 56/VRC Multiplexer.
Several welding equipment suppliers in recent years have been offering "multiplexer" technology: computer controls and software that provide the ability to simultaneously control numerous welding stations.
The Model 40-681 multiplexer features a range of selectable switching configurations, and the versatility of its architecture allows all multiplexer banks to be interlinked and common connections used as extra signal inputs programmatically.

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