Transponder

Summary: Learn how to effortlessly activate your SunPass Pro with this comprehensive step-by-step guide. Whether you're a new user or upgrading your SunPass,...

Transponder. The TR2 Transponder is the world-leading standard in accuracy and built to last. Check your data online. Easy and Free online access to your practice and race results via the Speedhive platform. Everything a racer needs. Together with the TR2 Transponder comes the TR2 Cradle to charge your transponder in just 5 hours for 5 days of racing, and ...

mPTX Direct Powered Transponder.ID Numbers: Main 7 Digit ID/ALT 7 Digit IDSystem Compatibility: Compatible with AMBrc2, AMBrc3, Mylaps RC3 and Mylaps ... view details. £53.40 View details Add to wishlist ADD TO YOUR BASKET. MRT mPTX Transponder - Heatshrink Kit. £42.60 ...

The transponder has a switch so that you can identify whether you meet the vehicle occupancy criteria. The transponder works the same as a standard E-ZPass on all other roads. If you want to use Express Lanes and don’t plan on having enough people to qualify to drive toll-free, you may use a standard E-ZPass transponder for travel. E-ZPass ... The transponder system no longer supports a pilot selectable GND mode. The transponder should always be in ALT mode prior to moving on the airport surface. It must be in ALT mode when operating in certain controlled airspace, in accordance with 14 CFR 91.215. For guidance on transponder operation, refer toProChip System. The ProChip Timing System by MYLAPS Sports Technology is the fastest, most reliable and easy to use system on the market. The system can be used at a wide range of active sports, including cycling, triathlon, skating, swimming, biathlon and more. Sports: High speed accuracy 2 – 5000 participants.Jan 9, 2024 · EDFA vs Repeater vs Transponder. In the realm of optical networks, connectivity forms the backbone of modern telecommunications. These networks leverage advanced components such as Erbium-Doped Fiber Amplifiers (EDFA), Repeaters, and Transponders to enhance signal strength, overcome attenuation challenges, and enable wavelength flexibility. A transponder is an electronic device installed in an aircraft that responds to radar signals from ground-based stations. When radar systems emit an interrogation signal, the transponder on the aircraft sends back a coded reply that contains essential information about the aircraft's identity, altitude, and, in some cases, intentions. ‍.Get a complete overview of E-ZPass, from how to purchase and install a transponder, to how to fund and manage your account. View How it Works. Find E-ZPass Locations. Locate retailers to purchase a transponder or replenish your account and experience our full range of services at one of several walk-in Customer Service Centers.Please login to access your E-ZPass MA account. Select the Type of Login below and then enter the required information. Type of Login. User Login.Transponder Types and Modes. The most basic type of transponder only transmits the programmed four-digit code. These Mode-A transponders are sometimes called 4096 transponders since they can send 4,096 different numerical codes. Note, the individual digits on the transponder are only programmable between zero and seven.

The transponder is attached to the windshield of a commercial vehicle and should remain on the vehicle for the life of the transponder (up to 10 years), even if the vehicle is sold. An annual User Fee expires on December 31st of its issue year, but the transponder may be used for multiple years (renewed) if the annual User Fee is paid for each ... mPTX Direct Powered Transponder.ID Numbers: Main 7 Digit ID/ALT 7 Digit IDSystem Compatibility: Compatible with AMBrc2, AMBrc3, Mylaps RC3 and Mylaps ... view details. £53.40 View details Add to wishlist ADD TO YOUR BASKET. MRT mPTX Transponder - Heatshrink Kit. £42.60 ...The airborne transponder receives interrogation codes on a 1030 MHz carrier wave from the ground station via one of two antennas located on the airframe. These signals are then amplified, demodulated and decoded in the transponder. The aircraft reply is coded, amplified and modulated as an RF transmission reply code on a 1090 MHz carrier wave.Learn the key differences between transceiver and transponder in fiber optic communication systems. Transceiver is a device that can transmit and receive signals, …Until your OTG transponder is registered to an E-ZPass MA account, certain restrictions and limitations apply. Please register your transponder and take advantage of all the benefits of being an E-ZPass MA Account Holder. Your account will also be credited with the $10 transponder deposit once the transponder is registered.

Other articles where transponder is discussed: satellite communication: How satellites work: …with the use of a transponder—an integrated receiver and transmitter of radio signals. A satellite has to withstand the shock of being accelerated during launch up to the orbital velocity of 28,100 km (17,500 miles) an hour and a hostile space environment …A transponder is an electronic device installed in an aircraft that responds to radar signals from ground-based stations. When radar systems emit an interrogation signal, the transponder on the aircraft sends back a coded reply that contains essential information about the aircraft's identity, altitude, and, in some cases, intentions. ‍.SART or Search and Rescue Transponder is extremely vital equipment on a ship as it performs the job of a signal-man. It is a vital machine during distress, for it helps in locating the position of the vessel in case it goes off-track. SARTs are made of waterproof components, which protects them against damage by water. A communications satellite 's transponder is the series of interconnected units that form a communications channel between the receiving and the transmitting antennas. [1] It is mainly used in satellite communication to transfer the received signals. A transponder is typically composed of: an input band-limiting device (an input band-pass filter ), Transponder slots fit a standards-based SFP, SFP+, XFP and/or CFP, providing the user with a modular, pluggable solution for both service and line sides. This architecture enables easy growth by simply adding optics to add services. PacketLight’s transponder devices provide 1+1 protection, remote management, and embedded OSC channel.

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Aug 28, 2023 · Optical Muxponders: An optical muxponder is an integral aspect of network enhancement, which is often used in fiber optic or blended networks. It helps increase the fiber capacity in terms of data transmission by reducing wavelengths. The muxponder combines multiple wavelengths into a single unit with the help of optical transport network (OTN ... 3 days ago · TransPonder's Recurring Events. TransPonder Book Club on April 23, 2024 5:00 pm. QTBIPOC Group on April 23, 2024 6:00 pm. We/Us/Ours on April 24, 2024 6:00 pm. Queer Family Yoga on April 24, 2024 6:00 pm. Gender Diverse Yoga Class on April 24, 2024 7:00 pm. Food Program on April 25, 2024 9:30 am. Queer, Trans & Disability Group on April 25 ... A Class A transponder also transmits at 12.5W while a Class B transponder only transmits at 2W – a third of the power of a 6W handheld VHF. This restricts Class B transmissions to a maximum … A transponder is an avionic system located on board the aircraft that provides information about the aircraft identification and barometric altitude to the ATC system on the ground and to TCAS on other aircraft. The reply from the transponder is also used by radar on the ground to determine the position of the aircraft. The

FasTrak ® is the statewide toll collection system used to pay tolls electronically in California. With a transponder based FasTrak transponder account, you can pay tolls electronically on every tolled bridge, lane and road in California. FasTrak drivers register their vehicle’s license plate to their account and affix a transponder to their ...To be able to track lap times, you need a transponder. This transponder is attached to the vehicle during the race and is detected every time the racer passes a X2 System loop in the track. The TR2 Transponder offers a better and smoother design with a Bluetooth connection to easily register and activate the device through your Speedhive app.The airborne transponder receives interrogation codes on a 1030 MHz carrier wave from the ground station via one of two antennas located on the airframe. These signals are then amplified, demodulated and decoded in the transponder. The aircraft reply is coded, amplified and modulated as an RF transmission reply code on a 1090 MHz carrier wave.⚠️ The 405 Express Lanes require a FasTrak® transponder. Existing transponders are accepted or purchase a new one here.. ⚠️ SMS texting scam regarding unpaid tolls for toll road users.Apr 24, 2023 · While transceivers and transponders are commonly used in RF applications, muxponders are added to the mix in the optical communications domain. Optical transceivers are used in fiber optic networks to receive and transmit optical signals in a single module. Optical transceivers use a range of optical wavelengths, typically from 850 to 1,550 ... Until your OTG transponder is registered to an E-ZPass MA account, certain restrictions and limitations apply. Please register your transponder and take advantage of all the benefits of being an E-ZPass MA Account Holder. Your account will also be credited with the $10 transponder deposit once the transponder is registered.Sticker Transponder Details. NC Quick Pass Sticker Transponder is designed for ease of use; you simply adhere it to your windshield. It offers the convenience of a smaller, more discreet profile at an affordable one-time cost. Installation: Sticks directly below the rearview mirror. Functionality: Operates on NC toll roads.Classic Transponder. Find information about support of your transponder, software downloads, activate your subscription on your transponder, registration, and creating an account.372501 RADAR TRANSPONDER 99HZ. IMPA Code: 372501. UOM: PCS. MTML UOM: PCE. At least 1 radar transponder shall be carried on each side of every cargo ship of 500 gross tons or more. Upon receiving radio waves from 9 GHz shipboard radar, this unit sends signals to indicate its position and bearing on the screen.The airborne transponder receives interrogation codes on a 1030 MHz carrier wave from the ground station via one of two antennas located on the airframe. These signals are then amplified, demodulated and decoded in the transponder. The aircraft reply is coded, amplified and modulated as an RF transmission reply code on a 1090 MHz carrier wave.Classic Transponder. Find information about support of your transponder, software downloads, activate your subscription on your transponder, registration, and creating an account.

The transponder in aviation is used to locate and identify an aircraft. Traditionally, 3 modes are available for this purpose: Mode A, Mode C and Mode S. In ...

A car transponder chip is a small electronic device fitted on the inside of a car key or fob. The chip is designed to communicate with the car’s immobiliser system, allowing the vehicle to be started only with the correct key. When the key is inserted into the ignition, the car’s immobiliser system sends a radio signal to the transponder ...Apr 6, 2023 · Learn what transponders are, what they’re used for, and the FAA regulations for different classes of airspace and equipment. Find out how to operate your aircraft’s transponder and avoid penalties or loss of license. What to expect from Beyond Light's new Exotics and gear.Watch on YouTube How to complete Destiny 2 Augment Triumphs step-by-step, from sourcing a Braytech Transponder to finding a Techno Squad LeaderFasTrak ® is the statewide toll collection system used to pay tolls electronically in California. With a transponder based FasTrak transponder account, you can pay tolls electronically on every tolled bridge, lane and road in California. FasTrak drivers register their vehicle’s license plate to their account and affix a transponder to their ...Step 1: Visit the E-ZPass Group website or the specific agency that issued your transponder. Step 2: Navigate to the customer service section. Step 3: Follow the instructions provided to report your lost or stolen transponder. This may include having to log into your account or contact customer service directly. A transmitter is a separate electronic component that generates a radio frequency ( RF) current or radio waves. These waves are used in communication systems to transfer data like audio, video, etc. A transceiver, on the other hand, can both send and receive digital signals. Macrocell, small cell and femtocell cellular base stations are fixed ... legacy transponder, the Lynx NGT-9000 is your ultimate panel mounted ADS-B solution. KEY FEATURES In addition to being a new-generation 1090ES transponder, the NGT-9000 brings a host of additional capabilities into your aircraft including: > 978 / 1090 MHz Dual-band receiver provides traffic and weather > Patented L3Harris Lynx TailTransponder slots fit a standards-based SFP, SFP+, XFP and/or CFP, providing the user with a modular, pluggable solution for both service and line sides. This architecture enables easy growth by simply adding optics to add services. PacketLight’s transponder devices provide 1+1 protection, remote management, and embedded OSC channel.Regular keys look the same as electronic keys, so you cannot determine if they have a chip based on your key's physical appearance. Get in touch with the team at Armstrong! Simply give us the make, model and year of your car and we will be able to tell you if you have a transponder key. BOOK A JOB ONLINE.NC Quick Pass is the N.C. Turnpike Authority’s all-electronic toll-collection program for the Triangle Expressway, Monroe Expressway and I-77 Express Lanes that offers drivers two ways to pay for tolls: a prepaid NC Quick Pass transponder account or the post-paid Bill by Mail program. A NC Quick Pass account is the e asiest and most cost-effective way to …

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What to expect from Beyond Light's new Exotics and gear.Watch on YouTube How to complete Destiny 2 Augment Triumphs step-by-step, from sourcing a Braytech Transponder to finding a Techno Squad Leader Waive goodbye to camera charges and monthly account fees with a transponder. Leasing a transponder for $24.50 per year or $3.95 per month is the best way to travel Highway 407 ETR. After three round trips, your transponder pays for itself. You save $4.20 on camera charges each time you travel and $3.95 monthly on the account fee on any Ontario ... Step 3: Connect the OBD-II Scanner. Next, connect your OBD-II scanner or key programmer to the OBD-II port of your Honda vehicle. The OBD-II port is usually located under the dashboard on the driver’s side. Once connected, turn on the ignition without starting the engine. Transponder Problems. Contact the LeeWay Service Center. The LeeWay Service Center is equipped with a test lane to test your transponder. Multiple Vehicles & Transponders. According to Lee County Ordinances, the transponder must be registered and permanently affixed to one vehicle. If a transponder is transferred, a citation may be issued. Report a lost or stolen transponder by calling the Pennsylvania Turnpike Commission E‑ZPass Customer Service Center at 1-877-736-6727 and speaking with a Customer Service Representative, reporting it on the phone system (IVR), or sending it over the web at our Help Center. Please provide the complete 11-digit transponder number for each ...Aug 1, 2021 · An aircraft’s transponder (short for “transmitter-responder”) is an electronic device on aircraft that transmits a four digit code (called a “squawk code”) which allows the aircraft to be identified by Air Traffic Control. In the cockpit pilots enter the four digit code assigned to them by ATC into the transponder (also referred to as ... Transponder. O transponder ( amálgama de transmitter-responder) é um dispositivo de comunicação eletrônico complementar de automação e cujo objetivo é receber, amplificar e retransmitir um sinal em uma frequência diferente ou transmitir de uma fonte uma mensagem pré-determinada em resposta à outra pré-definida “de outra fonte”. [ 1]Oct 31, 2022 · Hi. In this video we look at what is a transponder on an aircraft and the different modes or types of transponders available. We see what information these t... To be able to track lap times, you need a transponder. This transponder is attached to the vehicle during the race and is detected every time the racer passes a X2 System loop in the track. The TR2 Transponder offers a better and smoother design with a Bluetooth connection to easily register and activate the device through your Speedhive app.FasTrak Sticker Transponder. FasTrak sticker transponders are the latest in electronic toll collection technology. In 2019, The Toll Roads began offering new small, durable sticker transponders to replace existing hardcase transponders. Sticker and hardcase transponders are valid to pay tolls on all of California’s tolled bridges, lanes and ...Transponder Types and Modes. The most basic type of transponder only transmits the programmed four-digit code. These Mode-A transponders are sometimes called 4096 transponders since they can send 4,096 different numerical codes. Note, the individual digits on the transponder are only programmable between zero and seven.Product Design. Trig’s compact transponder is in two parts with a compact control head; this includes an inbuilt altitude encoder – saving further space and expense. A separate hardware box can be installed anywhere in the airframe. The mounted control head is only 54mm (2 3/25”) deep and can be fitted in panel using a 57mm (2 ¼ ... ….

Please login to access your E-ZPass MA account. Select the Type of Login below and then enter the required information. Type of Login. User Login.Collins Aerospace’s TDR-94D Transponder is an all solid-state, crystal-controlled receiver/transmitter specifically designed for TCAS-II-equipped business aircraft and regional airliners with 28 V DC electrical systems and limited space. It is the airborne portion of the Air Traffic Control Radar Beacon System.About sqauwk mode charlie.This is not the same as TA/RA, which comes from the TCAS system coupled with your transponder.So in my C172 i can squawk code charlie which means that my transponder is sending data like airspeed, alt and the transponder code. I believe squawking mode A(lpha) onlysend the transponder code. Bộ phát đáp. (Đổi hướng từ Transponder) Một con ong nghệ có gắn transponder vào lưng. Transponder dùng ở bè cứu sinh (SART). Bộ phát đáp ( tiếng Anh: transponder) là thiết bị liên lạc thực hiện tiếp nhận tín hiệu và phát lại tín hiệu theo cách thức xác định nào đó. [1] NXT-600™ for Business Jets. L3Harris’ NXT-600™ Mode S Transponder provides pilots with more efficient routing, while increasing airspace capacity, situational awareness and overall operational safety. The adaptor tray also enables quick and easily replacement of the Rockwell Collins TDR-94 and TDR-94D systems.Interior Transponder Alternative Placement There are certain vehicle features that may cause interior-mounted transponder performance to degrade. For the vehicle features listed below, an alternative that would facilitate continued transponder performance levels is the use of an exterior transponder. Exterior Transponder Vehicle ListSagetech’s FAA-certified next-gen MXS miniature transponder provides Modes A, C, S and and 1090 MHz ADS-B in/out for crewed or uncrewed systems worldwide. Each transponder offers user-friendly command and control software plus a full suite of test and integration components. These transponders serve as essential UAV …E-ZPass is an automated toll collection system that allows individuals and businesses to pay tolls in Maryland and other states where E-ZPass is accepted.. E-ZPass has two components:. An electronic transponder mounted on your vehicle’s windshield or license plate; An overhead antenna at the toll facility; Each time you travel through a …Apr 21, 2023 · The different types of transponders are A, C, and S. Transponder A sends a code back to ATC. Transponder C sends a code and altitude information or flight level data to ATC. Transponder S sends code and altitude information while also receiving and reporting data to other S transponders. All transponders must have the capability to generate a ... Transpondér. Transpondér Cessna ARC RT-359A transponder (béžová krabička) pod radiem (VHF). Transpondér (též odpovídač, anglicky Transponder či Squawk – transmitter-responder) je telekomunikační zařízení, které po obdržení signálu vyšle … Transponder, transponder: 1 n electrical device designed to receive a specific signal and automatically transmit a specific reply Type of: electrical device a device that produces or is powered by electricity, ping200XR It’s in There – Mode S ADS-B Transponder with Integrated Aviation GPS ping200XR combines the same technology used in the TSO certified ping200X transponder with an internal aviation GPS. Enabling airspace access, regulator, and Air Navigation Service Provider (ANSP) acceptance worldwide, ping200XR enables your …, Description of tools. Descriptions of tools used for programming and repair automotive electronics, as well as key learning and transponder cloning. Instructions, guides, catalogs and solutions useful for work with automotive electronics. Transponders and vehicle keys catalogue, ECMs pinouts, tools descriptions and others., Waive goodbye to camera charges and monthly account fees with a transponder. Leasing a transponder for $24.50 per year or $3.95 per month is the best way to travel Highway 407 ETR. After three round trips, your transponder pays for itself. You save $4.20 on camera charges each time you travel and $3.95 monthly on the account fee on any …, Please login to access your E-ZPass MA account. Select the Type of Login below and then enter the required information. Type of Login. User Login., One transponder generally has a bandwidth capacity of 27, 54, or 108 MHz, with larger capacity transponders capable of transmitting a greater number of channels or higher data rates. These various characteristics and functionalities of satellite transponders highlight their crucial role in the field of satellite communications., NC Quick Pass offers multiple transponder options to fit your travel needs. Save 35% on tolls by opening an account. NC Quick Pass Sticker. Free; The best option to easily pay tolls in 19 states. NC Quick Pass. $6.69; An additional option to pay tolls in 19 states. NC Quick Pass Flex. $16.49;, About sqauwk mode charlie.This is not the same as TA/RA, which comes from the TCAS system coupled with your transponder.So in my C172 i can squawk code charlie which means that my transponder is sending data like airspeed, alt and the transponder code. I believe squawking mode A(lpha) onlysend the transponder code., Properly installing the interior E-ZPass® transponder in your vehicle is easy and essential. 1. Clean and dry the inside of your windshield around the rear view mirror. 2. Without removing the mounting strips from the transponder, remove the tape backing from the mounting strips. 3. T urn the transponder label right side up facing you. Adhere ... , Learn the key differences between transceiver and transponder in fiber optic communication systems. Transceiver is a device that can transmit and receive signals, …, Regular keys look the same as electronic keys, so you cannot determine if they have a chip based on your key's physical appearance. Get in touch with the team at Armstrong! Simply give us the make, model and year of your car and we will be able to tell you if you have a transponder key. BOOK A JOB ONLINE., Sagetech’s FAA-certified next-gen MXS miniature transponder provides Modes A, C, S and and 1090 MHz ADS-B in/out for crewed or uncrewed systems worldwide. Each transponder offers user-friendly command and control software plus a full suite of test and integration components. These transponders serve as essential UAV …, Welcome to the official MYLAPS Transponder Shop. This is your place to buy MYLAPS transponders, chips, accessories and more, as well as find additional information about our products. MYLAPS offers timing devices for all types of sports. Our products include transponders and chips for car and bike racing, MX, RC racing, karting, cycling, ..., Mar 2, 2015 · “Transponder” includes a transmitter and a responder. It is a similar device to the transceiver. In optical fiber communications, a transponder is the element that sends and receives the optical signal from a fiber. A transponder is typically characterized by its data rate and the maximum distance the signal can travel. , About sqauwk mode charlie.This is not the same as TA/RA, which comes from the TCAS system coupled with your transponder.So in my C172 i can squawk code charlie which means that my transponder is sending data like airspeed, alt and the transponder code. I believe squawking mode A(lpha) onlysend the transponder code., We would love to help you. Call us today at (403)-589-8978 or contact us via email to book an appointment. Lock in Your Appointment. Transponder keys are car keys equipped with a type of electronic authorization device (chip) that is …, About sqauwk mode charlie.This is not the same as TA/RA, which comes from the TCAS system coupled with your transponder.So in my C172 i can squawk code charlie which means that my transponder is sending data like airspeed, alt and the transponder code. I believe squawking mode A(lpha) onlysend the transponder code., Vantagens & Benefícios. Menor pressão durante a aplicação, agulha mais fina se comparada ao tamanho padrão (1.8 mm x 2.6 mm) Sem rejeições fisiológicas do produto no organismo do animal. Altamente bio compatível. Tamanho menor em relação ao tamanho padrão dos transponders de vidro (1.4 X 8 mm X 2 x 12 mm). Garantia de uma correta ..., When choosing between SunPass Mini and SunPass Pro, consider your travel needs. SunPass Mini: Is more affordable. Is ideal if you primarily drive within Florida, Georgia, and North Carolina. Cannot be moved between vehicles. SunPass Pro: Has a broader coverage, working in 19 states. Is portable between vehicles., , Apr 24, 2023 · While transceivers and transponders are commonly used in RF applications, muxponders are added to the mix in the optical communications domain. Optical transceivers are used in fiber optic networks to receive and transmit optical signals in a single module. Optical transceivers use a range of optical wavelengths, typically from 850 to 1,550 ... , How to apply. Online +. To open an E-ZPass MA account online you will need the following information: License plate number (s) - as listed on your vehicle registration. Vehicle (s) - make, model, and year. Payment information - credit card, debit card, or banking information. Your free transponder will be mailed to the address on your account., A transponder (short for transmitter-responder and sometimes abbreviated to XPDR, XPNDR, TPDR or TP) is an electronic device that produces a response when it receives a radio-frequency …, FS Transponder-based Solution to Meet Your Needs Generally, it's highly individual when it comes to whether you need transponders and what transponders you need. There are many factors you should take into consideration before purchasing, such as the compatibility with the existing switches and transceivers, the speed and distance you …, ⚠️ The 405 Express Lanes require a FasTrak® transponder. Existing transponders are accepted or purchase a new one here.. ⚠️ SMS texting scam regarding unpaid tolls for toll road users., How to apply. Online +. To open an E-ZPass MA account online you will need the following information: License plate number (s) - as listed on your vehicle registration. Vehicle (s) - make, model, and year. Payment information - credit card, debit card, or banking information. Your free transponder will be mailed to the address on your account., Tron SART20 GMDSS 9ghz search and rescue radar transponder complies with IMO/SOLAS/GMDSS regulations and is MED and FCC approved. Tron SART20 and Tron AIS-SART can both be used as “search and rescue locating devices” according to IMO SOLAS Amendment in Resolution MSC.256(84) giving the ship owner freedom to …, Transponder information Follow In-Cab signal. If the transponder light does not match the roadside sign, follow the In-Cab signal; Transponder Number. The transponder number is located on the device near the barcode: 20xxxxxx or (xxx)54xxxxxxx; 24xxxxxx or (xxx)60xxxxxxx (typically gray) 28xxxxxx or 67xxxxxxx (typically black) , Jan 9, 2024 · EDFA vs Repeater vs Transponder. In the realm of optical networks, connectivity forms the backbone of modern telecommunications. These networks leverage advanced components such as Erbium-Doped Fiber Amplifiers (EDFA), Repeaters, and Transponders to enhance signal strength, overcome attenuation challenges, and enable wavelength flexibility. , The airborne transponder receives interrogation codes on a 1030 MHz carrier wave from the ground station via one of two antennas located on the airframe. These signals are then amplified, demodulated and decoded in the transponder. The aircraft reply is coded, amplified and modulated as an RF transmission reply code on a 1090 MHz carrier wave., A transponder (XPDR) is a receiver/transmitter which will generate a reply signal upon proper interrogation; the interrogation and reply being on different frequencies. (ICAO) Transponders first came into use to enable military authorities to identify friendly aircraft, which transmitted a coded signal when interrogated by military radar. , In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend of transmitter and responder. In air navigation or radio frequency identification, a flight transponder is an automated transceiver in an aircraft that emits a coded identifying … See more, TRANSPONDER definition: 1. an electronic device that gives out a radio signal when it receives a similar signal telling it…. Learn more.