transponder
Học thuậtThân thiện
Definition
- Noun:
- An electronic device that receives a specific incoming radio signal and automatically transmits a specific reply signal. It is often used for identification, tracking, or communication purposes.
Usage
- A transponder is typically used in aviation, maritime, and satellite communications. In aviation, an aircraft's transponder responds to radar interrogation signals from air traffic control, providing identification and altitude data. In vehicles, electronic toll collection systems use a transponder to automatically deduct payment.
Examples
- Noun:
- The air traffic controller identified the aircraft after its transponder sent a signal.
- My car has a transponder for the express toll lane.
- Satellites are equipped with transponders to receive and retransmit communication signals.
Advanced Usage
"Transponder code" or "Squawk code": In aviation, this is a four-digit octal code assigned by air traffic control for an aircraft to set on its transponder for identification.
- The pilot was instructed to "squawk 4572" on the transponder.
"Mode S Transponder": A specific, advanced type of transponder used in aviation that allows for the transmission of additional data, such as altitude and a unique aircraft address.
Variants and Related Words
- Transponders (n): Plural form.
- Modern aircraft are fitted with sophisticated transponders.
Synonyms
- Beacon: A device that transmits a signal for guidance or identification, though not always with an automatic reply function.
- Responder: A general term for a device that responds to a signal.
Related Phrases
Activate a transponder: To turn on or set a transponder to respond.
- The pilot activated the transponder after takeoff.
Transponder is offline: Indicates the device is not functioning or transmitting.
- The vessel could not be tracked because its transponder was offline.
Noun
- electrical device designed to receive a specific signal and automatically transmit a specific reply