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In telephony, the carbon microphone that converts sound waves into audio-frequency signals.



(Russian, transmitter).(1) A telegraph transmitting device in which code combinations of the characters in the text of a telegram are automatically converted into a series of electric current impulses that are sent to a communication line. The code combinations are represented by holes in a perforated paper tape.

During the initial stage in the development of telegraphy the electromechanical transmitter invented by C. Wheatstone in 1858 was used, and the Morse code, a type of unequal-length code, was employed. By the end of the 1950’s an electromechanical transmitter employing an equal-length five-element code had come into general use. In such a transmitter the perforated tape is advanced one step for each rotation of the transmitting distributor, and brush arms “read” the next code combination from the tape; by actuating contacts the brush arms produce the corresponding five-element combination of current and no-current signals. Telegraph transmitters are designed either as an accessory for automating the operation of the keyboard of telegraph transmitting equipment or as an independent unit. The use of a transmitter makes it possible to increase the output of transmitting equipment and the efficiency with which a communication channel is used.

(2) A transmitting device in remote-control and remote-signaling systems that is used in railroad transport to transmit coded electrical signals over a track circuit.


Osnovy telegrafii i telegrafnye stantsii. Moscow, 1970.
Kogan, V. S. Telegrafiia i osnovy peredachi dannykh. Moscow, 1974.



A device that generates signals. Contrast with receiver.
References in periodicals archive ?
The ''Global and Chinese TV transmitter Industry, 2016 Market Research Report'' is a professional and in-depth study on the current state of the global TV transmitter Market with a focus on the Chinese market.
Now, we are proud to be able to use our years of experience in broadcasting equipment, and digital TV transmitters in particular, to support the world's first DVB-T2 digital terrestrial broadcast network.
In the project carried out by SNRT, NEC supplied 12 digital terrestrial TV transmitters that adopt the Digital Video Broadcasting-Terrestrial (DVB-T) standard to 6 major cities including Rabat, Casablanca, Marrakesh, Tangier, Oujda, and Meknes.
Addressing a three-day All India Editors' Conference in Srinagar, Soni said: "I would particularly like to mention in this context setting up of high power TV transmitters in border areas and low power FM transmitters in uncovered areas of Jammu and Kashmir.
amp; LAS VEGAS -- Harris Corporation (NYSE:HRS) announced that TV TEM, a Rede Globo affiliate in Brazil, is installing 45 Harris([R]) Maxiva[TM] digital TV transmitters to increase over-the-air digital TV (DTV) broadcast coverage in Sao Paulo.
The Compact Class is an air-cooled, UHF TV transmitter that provides terrestrial TV and mobile DTV broadcasters with several options to boost over-the-air services.
The tiny capsule contains a TV transmitter and light to illuminate the inside of the stomach and gut.
He said the Crystal Palace TV transmitter radiated 1,000 kilowatts of power, or one megawatt, or a million watts of power on its analogue TV transmitter.
The Allies also attacked a TV transmitter which was seen as a target because Saddam used it to spread propaganda.
The Home Roam TV is designed for quick set up and ease-of-use by simply plugging in the adapter to a set top box, DVD or TV to the Home Roam TV transmitter.
In Connection With Digitization of Tv Transmitter at Hpt Tv Kochi.
IT'S growing - the Emley Moor TV transmitter is shooting for the sky.