Radio transmitter/receiver that transmits signals only when it has received the correct interrogation.

A satellite component that receives, modulates, amplifies and retransmits a signal. It consists of all the components that identify one Channel.

a device that emits a sound of a specific frequency at a set time interval

An electronic device aboard the airplane that enhances an aircraft's identity on an ATC radar screen.

A device used in satellites to receive a data communications signal at one frequency and transmit the signal at a different frequency.

A satellite channel. There is often one program per transponder. Some transponders are wider than 6 MHz and can carry more than one NTSC program. Several digital channels can fit on one transponder.

The association of a receiver, frequency converter and transmitter devices in a satellite

That portion of a communications satellite that acts as a receiver, amplifier, and retransmitter for all signals communicated up to and down from the satellite.

A transponder is a piece of avionics that replies to a radar signal with a short identifier and (if it knows it) the altitude of the aircraft. This information makes ATC's life easier, which makes the pilot's easier. There are some areas, like class B airspace where a transponder is required.

A piece of equipment which, when set upon a specific radio frequency, emits a directional signal of its own and enables the receiver to track or monitor the vehicle's location.

A device that sends out a sound pulse, or "ping."

An electronic device that "responds" to interrogation by ground-based radar with a special four-digit code that specifically identifies the aircraft on which it is located. Certain transponders have the ability to transmit automatically the altitude of the aircraft in addition to the special code.

A device which sends out an identifying signal which controllers can use to track a airplane on radar.

airborne receiver/transmitter portion of the SSR system which receives the interrogation signal from the ground and automatically replies according to mode and code selected. Modes A and B are used for identification, using a four-digit number allocated by air traffic control. Mode C gives automatic altitude readout from an encoding altimeter.

A microchip, containing unique identification information, that is implanted under the skin of an animal and used to prove ownership of the animal; also a transmitter/receiver that communicates with the Air Traffic Control system.

transmitter/responder -- radio which when triggered by correct received signal automatically sends out precoded reply

Part of a communications satellite that receives a signal from the earth, amplifies it, converts it to a lower frequency and re-transmits it back to the earth. Each transponder is essentially a broad-band amplifier with a bandwidth of about 36 MHz and a transmit power ranging from a few watts to hundreds of watts depending upon the application. Each transponder can carry thousands of telephone conversations or one to many television channels. Satellites include a number of transponders with 16 to 48 being typical of different applications.

A transmitter-receiver used to track fish passage.

Receiver-transmitter combination that retransmits the received signal greatly amplified and at a different frequency. Communications satellites usually contain several transponders.

Transmitter/responder; radio which automatically sends a precoded reply when

Electronic device on-board a satellite to amplify signals prior to re-transmitting them back to earth.

The term channel is often used interchangeably with the word transponder with the same meaning. Transponder is commonly used in contex with satellite data traffic. However, the word channel refers more accurately to the absolute frequency range over which the transponder operates (e.g. 11 GHz +/- 18 MHz), rather than to the amplification process itself. A channel is normally defined by its centre frequency and its usable bandwidth.

A transceiver that is carried by a satellite. Transponder links a satellite with its earth stations, that's receiving signal from an earth station ( uplink), amplifying it, and retransmitting the signal to another earth station ( downlink).

A receiver-transmitter device used for identification. It automatically transmits a signal when the proper interrogating signal is received.

A satellite component that receives, modulates, amplifies, and retransmits a signal. Through MPEG compression more then one television or audio channel are transmitted over a signal transponder. When you look at the signal strength screen from a satellite receiver, you are given the ability to check the signal strength on different transponders. Each transponder is responsible for a several or even a dozen or more satellite channels. Since each transponder is a separate electronic component on the satellite, you will see a difference in signal strength from one transponder to another. Some transponders will show no signal strength. This is a result of spot beams and is normal operation.

A combined receiver and transmitter whose function is to transmit signals automatically when triggered by a suitable signal. Those used in space are sensitive to radio signals.

Attached to the bottom of race cars, a transponder is a radio transmitter which electronically monitors lap times around a track and is used for scoring.

Equipment inside a satellite, responsible for receiving a single up linked channel and re-broadcasting it back to earth.

The part of a communications satellite that receives signals from the earth, alters their frequency, amplifies the signal, and sends them back to earth. The word originates from transmitter and responder.

A reference to a radio frequency identification (RFID) tag that combines the technical terminology of transmitter (trans) and responder (ponder). The transponder becomes activated when placed inside a magnetic field generated by an antenna. The induced current in the coil in turn charges the capacitor located inside the chip. Depending upon the transfer protocol, the chip transmits its identification code (and attached information if R/W).

Equipment inside a satellite responsible for receiving a single uplinked channel and rebroadcasting it back to Earth.

electrical device designed to receive a specific signal and automatically transmit a specific reply

a battery-operated , radio frequency identification (RFID) unit that transmits radio signals

a broadband RF channel used to amplify one or more carriers on the downlink side of a geostationary communications satellite

a "coherent" system in which the downlink frequency is based on the frequency of the uplink signal from Earth

a combination of a receiver, transmitter and antenna package on a satellite

a device on a satellite that receives signals from Earth and then transmits those signals back to the planet for reception covering a broad area

a device on board a communications satellite that receives an uplink frequency and automatically sends a different downlink frequency

a device on the plane which broadcasts the aircraft's speed, altitude and identification

a device that both sends and receives a pre-determined signal

a device that can transmit and receive signals ('pings') but when it receives aspecific interrogation signal it responds by transmitting a specific reply signal

a device that, on receiving a particular signal, automatically responds

an airborne radar beacon transmitter/receiver which automatically receives the signals from the ground based radar and selectively replies with a specific code

an automatic device that receives, amplifies, and retransmits a signal on a different frequency on-board a satellite

an electronic component of a satellite that works hand-in-hand with the antenna, to convert the frequency of an uplink signal for subsequent amplification and re-transmission of the signal to earth

an electronic device used to wirelessly receive and transmit electrical signals

a PASSIVE device in that it only TRANSmits a resPONse when pinged by ground radar

a piece of equipment on board the satellite that receives signals from an uplink on the ground, translates them to the downlink frequency, and amplifies them for retransmission to earth

a radio or radar transmitter receiver activated for transmission by the reception

a satellite component that receives and re-transmits our signal to your dish

a satellite system that receives data from a terrestrial station and broadcasts them to another terrestrial station

a small radio transmitter that communicates with the race computer to figure out what place you are on the track during a race

a special kind of radio transmitter and reciever

a special type of radio in the aircraft that listens for a radar beam

a transmitter and receiver

a transmitter on an airplane which sends out a coded signal in response to a radar pulse from the ground station

a wireless communications device that is usually attached to a satellite

a wireless communications, monitoring, or control device that picks up and automatically responds to an incoming signal

A device on a communication satellite that receives signals from Earth, alters their frequency, amplifies them, and retransmits them to Earth on a different frequency.

Electronic package aboard a telecommunications satellite that 1) receives transmissions from earth (uplink); 2) changes signal frequency; 3) amplifies the signal; and, 4) transmits the signal to earth (downlink). Modern communications satellites use 24 or more transponders and can be C-Band, Ku-Band, or both. (See also: C-Band, Downlink, Ku-Band, Satellite, Uplink)

an airborne transmitter which responds to a ground-based interrogation signal to provide air traffic controllers with more accurate and reliable position information than would be possible with "passive" radar; a transponder may also provide air traffic control with an aircraft's altitude

An electronic device that emits a unique radio signal. When the key is operated in the ignition lock, the on-board computer transmits a radio signal to the key. If the key is properly programmed, it echoes back the correct signal. The computer then allows the engine to start.

Device on a communications satellite that receives electromagnetic signals and transmits them back to Earth.

Satellite Transponder picks up signals from earth, translates them into a new frequency, amplifies them, and transmits them back to earth. One can use a half transponder, as well.

An electronic device on a satellite that is used to amplify signals prior to their re-transmission to earth.

An electronic transmitter/responder, commonly referred to as a Tag.

A satellite is divided up in parts called transponders. A transponder is one distribution channel of the satellite. Each transponder can be used for distribution of several programs.

A transponder is one distribution channel of the satellite. It receives microwave signals and re-transmits them. These signals are downconverted to another frequency and amplified before re-transmission.

A RFID tag or other electronic device that acts as a TRANSmitter/resPONDER when attached to a product or object to be identified. When appropriate signals are received, the tag transmits information in the form of a radio wave to a reader.

A devise that automatically transmits sonar signals when actuated by a specific sonar signal from an interrogator. Transponders are used to mark or track objects or sites underwater. They are programmed to be in a continuous passive (listening) mode until they receive a valid signal from a transponder interrogator.

Equipment in the satellite that receives a single uplinked signal from a teleport on the ground, amplifies it, converts it to a different frequency and re-transmits it to the ground so that every household with a dish within the footprint of the satellite can receive the signal.

An electronic device on a satellite used to boost or amplify signals before sending them back to earth. The transponder receives an uplink signal at one frequency, converts its frequency, amplifies it, and retransmits it to the ground. Satellites generally have 10 - 40 transponders.

The equipment on a satellite that accepts the signal sent from earth and, after amplifying and changing the frequency, sends it back to earth for reception; may be referred to as a repeater.

Combination receiver and transmitter on a satellite that relays signals transmitted to it back to earth on a different frequency.

Receives a transmission from an earth station, changes its frequency, and re-transmits it back to earth.

A transponder is a satellite component that receives, modulates, amplifies, and retransmits a signal. More than one television or audio channel can be transmitted over a signal transponder using MPEG compression.

A radio transmitter-receiver that is activated when it receives a predetermined signal. RFID tags are sometimes referred to as transponders.

The electronics of a satellite that receives an uplinked signal from the earth, amplifies it, converts it to a different frequency and returns it to the earth.

A device that transmits a response signal automatically when activated by an incoming signal.

Satellite transmitter and receiver that receives a signal from earth on one frequency and amplifies the signal prior to retransmission back to earth on another frequency. A typical C-band satellite has 12 transponders which receive and transmit 24 channels (12 polarized vertical, 12 polarized horizontal)

The equipment on a satellite that receives an electronic signal from a transmitting station, amplifies it, and then retransmits it to receiving stations on earth.

A single transmitting channel from a satellite which carries a number of programme channels.

An electronic transmitter/responder which is attached to the object to be identified, and when signals are received, transmits data as radio signals to a reader. Also referred to as a Tag.

An RF subsystem onboard a satellite which is responsible for receiving the uplink signal, converting it to the downlink frequency, and then retransmitting it.

The device in a communications satellite that receives signals from the earth, translates, and amplifies them on another frequency, and retransmits them.

Component of a communications satellite that receives a signal from earth, processes and amplifies it, and then re-transmits it to another location on earth.

A wireless communications device usually attached to a satellite. A transponder receives and transmits radio signals at a prescribed frequency range. After receiving the signal a transponder will at the same time broadcast the signal at a different frequency. The term is a combination of the words transmitter and responder. Transponders are used in satellite communications and in location, identification and navigation systems.

Used in video satellites to receive program material from ground-station uplinks and then retransmit it to properly aimed dish receivers back on the ground.

Satellite transmitter and receiver that receives and amplifies a signal prior to re-transmission to an earth station.

A radio-frequency transmitter-receiver combo. Another term for a RFID tag.

A satellite component that receives, modulates, amplifies and retransmits signals.

A transmitter-receiver arrangement so designed that the receiver generates a new signal which is then retransmitted. Used to measure linear distance or changes therein.

A physical part of a satellite that broadcasts the signal. In colloquial use, the satellite equivalent of the "channel" a television station is broadcast on (eg "broadcasting from Transponder 2C of the satellite").

A receiver/transmitter combination which receives a signal and retransmits it at a different carrier frequency. Transponders are used in communication satellites for reradiating signals to earth stations or in spacecraft for returning ranging signals.

The circuitry in a satellite that receives a signal from the ground at one frequency and relays it back to Earth at another. Most satellites have 12 or 24.

The circuitry on a satellite that receives the uplink signal, amplifies it, then retransmits it as the downlink signal.

The equipment on a satellite that receives the signal, amplifies it, and then retransmits it to receiving stations on earth. Domestic communications satellites commonly have 12, 18, or 24 transponders.

the heart of a satellite's communications system. the transponder acts like a repeater in the sky. It receives it receives a transmission and then amplifies the signal, changes its frequency, and transmits a signal back to earth. The number of transponders carried by a given satellite is dependent upon different variables, including the strength of the satellite's power, its weight, and the application for which it is designed.

A radio frequency path through a satellite with a specific bandwidth, uplink/downlink frequency and beam. Transponders can be sold in whole or can be segmented into smaller pieces of bandwidth.

An electronic transmitter that is mounted on the right rear of the racecar, usually on the side of the box protecting the fuel cell. The transponder is used to send a signal to a NASCAR receiver located at the start/finish line to record the carâ€(tm)s lap progression and time itâ€(tm)s taking the car to complete a lap. Teams in the pit area also have access to this information during the race via computer.

equipment on board a satellite including the antenna, receiver and transmitter that receives and retransmits a signal. ETV's transponder is located on the Telstar 401 satellite.

An instrument used on communications satellites that receives a signal from a station on Earth at one frequency, amplifies it, and shifts it to a new frequency.

In satellite communications, a transponder receives the transmission from earth (uplink), amplifies the signal, changes frequency and retransmits the data to a receiving earth station (downlink).

Satellite equipment in space,which receives a signal,amplifies it,changes its frequency and retransmits back to earth. A typical earth satellite can have 24 transponders and each can carry six television channels.

An acoustic device that scientists place above the seafloor, usually in groups of two or more, to help them navigate deep submergence vehicles. To locate a transponder, a ping is broadcast from a ship to the seafloor. If the transponder hears the ping, it sends a reply ping, letting researchers know theyíre in the right place. The transponder and its batteries are protected inside a plastic case the size of a beach ball, and can operate from the seafloor for up to five years. | | | | | | | | | | N | O | | | | | | | X | Y | Z

A transmitter-receiver device that transmits signals automatically when it receives pre-determined signals. The term "satellite transponder" refers to a transmitter-receiver subsystem on-board the satellite that uses a single high power amplification chain and processes a particular range of frequencies (the "transponder bandwidth"). There are many transponders on a typical satellite, each capable of supporting one or more communication channels.

A combination receiver, frequency converter, and transmitter package, physically part of a communications satellite. Transponders have a typical output of five to ten watts, operate over a frequency band with a 36 to 72 megahertz bandwidth in the L, C, Ku, and sometimes Ka Bands or in effect typically in the microwave spectrum, except for mobile satellite communications. Communications satellites typically have between 12 and 24 onboard transponders although the INTELSAT VI at the extreme end has 50.

This is a small electronic device mounted in a race vehicle. It transmits a signal to a receiver located at the start/finish line. The receiver records a vehicle's position and lap times during a race for scoring purposes.

The electronic equipment on a satellite that receives signals from an uplink, converts signals to a new frequency, amplifies the signal, and sends it back to earth. Satellites are usually equipped with 12 to 14 transponders.

A device (chip) used for identification, which automatically transmits certain coded data when actuated by a special signal from an interrogator.

Discrete frequency slot assigned to an uplink/downlink.

A transmitting-receiving system that on receipt of an interrogation signal will transmit generated or stored signals.

TRANSmitter and resPONDER more

A miniature receiver-transmitter that can be tracked by a radio-direction finder.

Device in an orbiting communications satellite that receives a signal from earth, translates and amplifies the signal, and retransmits it back to earth.

In a Thaicom satellite, a device that receives a earth-based signal, shifts the signal's frequency, amplifies the signal, and retransmits the signal to receivers on the earth.

(or radar responder) On-board equipment which communicates with secondary radar (–) and transmits the aircraft’s identification code to ground-based systems. TriNET Trinational audit organisation founded in 1999 which forged a partnership between German, Austrian and Swiss (skyguide) air traffic control services. TriNET performs independent analyses on the safety (–) of technical systems and operational procedures. Turbulence Irregular airflow, usually occurring where airflows or air masses mix. Turbulence can also be created by the passing of another aircraft. (– Wake turbulence)

A satellite component that receives and retransmits a TV signal or perhaps many narrower-band data or audio channels.

the term used for a linear translator in a satellite. Inverting transponder transmits received upper sideband as lower sideband. Non-inverting transponder transmits received upper sideband as upper sideband

Transponders were originally electronic circuits that were attached to some item whose position or presence was to be determined. Another major category of transponders is the use of transponders in radio relay systems such as fixed/mobile radio networks and satellite transmissions. Back to the TOP

The receiver, transmitter, and antenna equipment that together forms a single repeater channel on a satellite.

The part of a satellite that receives and transmits a signal.

The part of a satellite that receives and retransmits programming.

A device that relays electrical signals not necessarily in the same form or on the same frequency as received.

A part contained in a satellite that is a combination receiver, frequency converter, and transmitter package. Communications satellites typically have between 12 and 24 onboard transponders.

Equipment in a satellite which receives a single uplinked channel from a satellite Earth station; amplifies it, converts the frequency and changes the polarisation; then rebroadcasts it back to Earth.

A transponder is an electronic device that produces a response when it receives a radio-frequency interrogation. In aviation, aircraft have transponders to assist in identifying them on radar and on other aircraft's collision avoidance systems.

an electronic device that serves to identify units of a particular side to that side

a small battery-powered device, programmed with specific customer account information, which is read by an antenna mounted above the toll plaza

a small electronic chip embedded in the head of the key

a small electronic device that attaches to the inside of your windshield

a small electronic device that attaches to the interior of the windshield behind the rear-view mirror

The device, such as a wand, disc, or card that is read by TIRIS to open a gate arm.

A device to disarm an immobiliser automatically without the user having to insert a touch key.

Electronic devices that store information. Other devices can read this information. When placed in cars, transponders can be used for automated toll collection like SunPass.

An electronic device mounted to the kart, which triggers an external (track side) mechanism each time you cross a certain point on the racetrack. Some organizations use transponders to automate their timing and scoring systems, enabling them to accurately determine the starting grid in qualifying. Personal systems are also available. Understeer When during cornering the front tires loose grip before the rear tires, the front of the kart will slide towards the outside of the curve. The sensation is that the kart is not turning as much as indicated by the steering wheel. The kart is slowed down, since the front tires are effectively scrubbing off speed. This condition is also referred to as pushing. See also oversteer, handling.

The in-vehicle device component of a DSRC (or ETC) system. A receiver or transceiver permitting the Operator's Road-Side Unit to communicate with, identify, and conduct an electronic toll transaction. Also called On-Board Unit and Tag.