About Transponders. Customers can lease transponders to use when traveling on Highway 407 and 407 ETR. Please note that these transponders are property of 407 ETR and are leased through them. Transponder Lease Agreement is an agreement signed between the customer and 407 ETR. Please visit our service provider’s website www.407etr.com for …The standard SunPass Mini transponder costs about $5, whereas the SunPass PRO Portable transponder runs $20. However, SunPass Mini works in only six states, all of which are in the South or Midwest. SunPass PRO is the only transponder that can be installed on motorcycles. Plus, you can remove it from your car’s windshield if …giving your transponder about 45-50 seconds to become operational. As soon as you are airborne, turn the Function Selector to ON, which places the K T 76A in normal Mode A operation. If your aircraft is equipped with an encoding altimeter, turn the Function Selector to the ALT (Altitude) position, for altitude reporting (Mode C) to ATC.AN/APX-119 IFF Mark XII A, Mode S, ADS-B Digital Transponder. Enables aircraft to operate seamlessly throughout international, civil and military airspace, while meeting all IFF and ATC requirements. APX-119 Transponders (data sheet) APX-119 IFF Mark XIIA, Mode S, ADS-B embedded GPS Transponder.The standard SunPass Mini transponder costs about $5, whereas the SunPass PRO Portable transponder runs $20. However, SunPass Mini works in only six states, all of which are in the South or Midwest. SunPass PRO is the only transponder that can be installed on motorcycles. Plus, you can remove it from your car’s windshield if …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. 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 …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. Feb 27, 2024 · A Transponder we can say that it is a controller device that picks up and automatically responds to an incoming signal or whatever the input is coming in the machine, so this is a combination of transmitter and responder which is called a transponder. Also, a transponder is an electronic device that produces a response when it receives a radio ... Finisar SFP+ Active Optical Cable for 10G and 25G Ethernet. Also available with Connectivity Diagnostics® visual fault alert. Finisar 40 Gb/s to 400 Gb/s Parallel Active Optical Cable for 40, 100 and 400 Gigabit Ethernet; InfiniBandTM QDR, FDR, EDR, HDR and NDR; and Intel® Omni-Path Architecture. 40G also available with Connectivity ... 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 ListImmobiliser sign. An immobiliser or immobilizer is an electronic security device fitted to a motor vehicle that prevents the engine from being started unless the correct key ( transponder or smart key) is present. This prevents the vehicle from being "hot wired" after entry has been achieved and thus reduces motor vehicle theft.FEATURES. Digital Mode A/C, panel-mounted transponder with sequential pushbutton code entry. Pre-set VFR code. Operates with both 14 and 28 volt electrical systems. Slide-in replacement for existing KT-76A (see FAQ for 14 and 28V considerations) Backlighting of bezel nomenclature and knobs. 200 watts peak minimum transmitter power from PA Tube.A transponder is a device that generates a reply signal when interrogated by radar. It is used for aircraft identification, surveillance, and safety nets in civil and military aviation. …Purchase an E-ZPass at CVS. Need your E-ZPass ASAP? Head to your local CVS and get your transponder today. Mount it to your windshield, activate your account, and you’re ready to hit the Indiana Toll Road. Certain vehicles may require a bumper transponder due to a heated or infrared windshield,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.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 ... Headlamp Sticker Transponder Installation Instructions. Motorcycle transponders are sticker transponders made specifically for motorcycles. They can be mounted to the headlamp lens or cover. If you have a motorcycle listed on your account, you can request a motorcycle sticker transponder by calling our Customer Service Call Center at 949-727-4800. The Most Mirco size of Easylap Transponder!A.This model with LED inside when power up.B.Compatible with EasyLap & Robitronic Lap Counter system.C... $23.99. Ex Tax:$23.99. Add to Cart. Add to Wish List Compare this Product. Buy Now Question. Quickview. USB 2.0 CABLE(5M) is that transceiver is a combined radio transmitter and receiver while transducer is a device that converts energy from one form into another. 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.Your transponder will be active in the State of Indiana within 1–3 hours of activation. You may experience up to a 48-hour activation outside of Indiana. If you purchased your E-ZPass at CVS. If you purchased your E-ZPass at a local CVS and are ready to activate your transponder, please click here .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. 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] 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. .Oct 31, 2022. Satellite transponder provides a communication channel between the transmitting & the receiving antenna on the satellite with the base station on the ground. A transponder performs the function of both the transmitter and the receiver in a satellite. Transponders mainly perform the function of receiving a given signal and then ...TransPonder, Eugene, Oregon. 3,226 likes · 96 talking about this · 2 were here. This page is a public page to share information about the TransPonder non-profit organization.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. In this way, the various units that built a transponder down-converts the 6 GHz signal into 4 GHz and provide the signal from the output of HPA to the transmitting antenna. Hence, in this way a 6/4 GHz transponder operates. Let us now understand how a 14/11 GHz band transponder operates by considering the diagrammatic representation shown below: 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.Transponder options. See what transponder fits your travel needs. HOV. Learn about free travel in the I-77 Express Lanes. Customer Service Centers Charlotte Monroe Morrisville. Hours of Operation Monday-Friday, 9 a.m. to 5 p.m. Saturday, 9 a.m. to 2 p.m. Phone (877) 769-7277. Fax (919) 388-3279.First, the transponder sends a signal to the radar that contains a four-digit squawk code. For example, if the air traffic controller tells one plane to “Squawk 1234,” that number will appear on the radar scope. This more detailed target is called a “secondary return.”. What’s more, modern transponders have “Mode-C.”.Immobiliser sign. An immobiliser or immobilizer is an electronic security device fitted to a motor vehicle that prevents the engine from being started unless the correct key ( transponder or smart key) is present. This prevents the vehicle from being "hot wired" after entry has been achieved and thus reduces motor vehicle theft.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.Using SunPass in Different Vehicles. If you have multiple vehicles, you can add them all under one SunPass account. However, it’s important to note that a transponder is assigned to a specific vehicle and should not be used on another, as per the official SunPass guidelines. If you own a motorcycle, remember to purchase a …FEATURES. Digital Mode A/C, panel-mounted transponder with sequential pushbutton code entry. Pre-set VFR code. Operates with both 14 and 28 volt electrical systems. Slide-in replacement for existing KT-76A (see FAQ for 14 and 28V considerations) Backlighting of bezel nomenclature and knobs. 200 watts peak minimum transmitter power from PA Tube.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 ...This means that the transponder or muxponder converts an optical signal to an electrical signal and then generates a copy of the signal in optical form at a new wavelength. The benefit of OEO is that transponders and muxponders can automatically receive, amplify and re-transmit signals on new wavelengths without any changes to the data carried ...giving your transponder about 45-50 seconds to become operational. As soon as you are airborne, turn the Function Selector to ON, which places the K T 76A in normal Mode A operation. If your aircraft is equipped with an encoding altimeter, turn the Function Selector to the ALT (Altitude) position, for altitude reporting (Mode C) to ATC. 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 ... How to Mount Your Transponder. You must mount your transponder in accordance with the instructions provided below. If your transponder is not properly mounted, your transponder may not be read, and you may incur a higher toll rate as a result. You will be responsible for paying the higher toll rate. Windshield Transponder Mounting …En este video se explica el panel del transponder, sus componentes y su operación a lo largo de un vuelo, ejemplificando sus modos. Para tener un entendimien...A standard SART 9 GHz radar transponder, produced by Jotron, on board a Norwegian ferry. The unit is 251 mm high. A search and rescue transponder (SART) is a self-contained, waterproof transponder intended for emergency use at sea. These devices may be either a radar-SART, or a GPS-based AIS-SART (automatic identification system …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 ...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;Apr 17, 2018 · Meaning, a transceiver is a device which consists of both transmitter and receiver circuitry. BLE modules, nRF, Lora etc are good examples of transceivers. Transponder: A transponder on the other hand can only either transmit data or receive data and not both. Most commonly transponders are small devices with unique ID code and an antenna with ... Satellite Communication - Transponders. The subsystem, which provides the connecting link between transmitting and receiving antennas of a satellite is known as Transponder. It is one of the most important subsystem of space segment subsystems. Transponder performs the functions of both transmitter and receiver (Responder) in a satellite. Immobiliser sign. An immobiliser or immobilizer is an electronic security device fitted to a motor vehicle that prevents the engine from being started unless the correct key ( transponder or smart key) is present. This prevents the vehicle from being "hot wired" after entry has been achieved and thus reduces motor vehicle theft.The Transponder Node attaches to a target in the same fashion that a C4 Charge does. Throw it a short distance to place it. Example screenshot: Node. The node can be removed (destroyed) via the creature's radial menu (under "Options"). To change the frequency of the tracker, equip it and press the weapon attachment key (defaults to N, ), then ...Jul 23, 2021 · Optical transponder, also referred to as O-E-O (optical-electrical-optical) is an integrated part and is very crucial for the signal transmission in the whole WDM network system. An optical transponder works by converting the incoming signal from the end or client service to a WDM wavelength. This process is important in WDM systems and this ... TransPonder’s Recurring Events. TransPonder Book Club on April 16, 2024 5:00 pm. Queer Family Yoga on April 17, 2024 6:00 pm. Gender Diverse Yoga Class on April 17, 2024 7:00 pm. Trillium Produce Plus Program on April 18, 2024 9:30 am. Queer, Trans & Disability Group on April 18, 2024 6:00 pm. TransParent Support Group: Virtual on April …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.How to Mount Your Transponder. You must mount your transponder in accordance with the instructions provided below. If your transponder is not properly mounted, your transponder may not be read, and you may incur a higher toll rate as a result. You will be responsible for paying the higher toll rate. Windshield Transponder Mounting …Learn the basics of aircraft transponders, the devices that transmit details about your plane's position and status to ground-based radar systems. Find out the …AN/APX-119 IFF Mark XII A, Mode S, ADS-B Digital Transponder. Enables aircraft to operate seamlessly throughout international, civil and military airspace, while meeting all IFF and ATC requirements. APX-119 Transponders (data sheet) APX-119 IFF Mark XIIA, Mode S, ADS-B embedded GPS Transponder.TransPonder is a nonprofit that supports and educates trans/gender-diverse people and their allies in Eugene, Oregon. It offers various events, workshops, and …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 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) 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 electricityJan 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. 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 ...Learn the key differences between transceiver and transponder in fiber optic communication systems. Transceiver is a device that can transmit and receive signals, …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.Transponder: When you mount the transponder inside your model you have to search for a position where the transponder has direct visibility with the bridge. Otherwise the infrared signal is not delivered to the receiver modules. The transponder can be connected directly to the radio receiver in the model.Transponder Snails, or Den Den Mushi, are used throughout the "One Piece" world for vocal and visual communication. In a reality without advanced technology, the larger-than-normal animals ... 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. ⚠️ 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. 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 ... A transponder attached to your windshield and a positive account balance is all you need. Get Started Order an E-ZPass transponder or register your retail E-ZPass transponder. transponder: [noun] a radio or radar set that upon receiving a designated signal emits a radio signal of its own and that is used especially for the detection, identification, and location of objects and in satellites for relaying communications signals.Phone: 541-321-0872 Fax: 541-515-6081 Email: [email protected]. Office Location: 1185 Arthur St., Eugene, OR 97402 Office Hours: 9a - 5p, M-Th; Friday by appointment onlyEn este video se explica el panel del transponder, sus componentes y su operación a lo largo de un vuelo, ejemplificando sus modos. Para tener un entendimien...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 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 ...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.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 …Flightradar24 is a global flight tracker that shows live air traffic from around the world. Flightradar24 combines data from several data sources including ADS-B, MLAT, satellite, and radar data. This positional data is aggregated with schedule and flight status data from airlines and airports to create a unique flight tracking experience on ...How to Mount Your Transponder. You must mount your transponder in accordance with the instructions provided below. If your transponder is not properly mounted, your transponder may not be read, and you may incur a higher toll rate as a result. You will be responsible for paying the higher toll rate. Windshield Transponder Mounting …What is a transponder? A transponder is an electronic device found on aircraft that helps to identify them on air traffic control (ATC) radar screens. It is an essential component of the secondary …24/7 Residential, Commercial & Automotive Locksmith Services. (888) 947-5585. Transponder keys have become a standard in modern vehicles, offering enhanced security features. In this detailed guide, we'll delve into the understanding of transponder keys, explore the programming process, and discuss efficient methods for replacing or …E-ZPass On the Go is a packaged transponder with a pre-paid toll balance of $25 that’s available to use immediately. You must register your On the Go transponder within seven days of first use. Alternatively, you can sign up for E-ZPass online. You will be required to deposit $25 into your E-ZPass Account as a starting toll balance. 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 is that transceiver is a combined radio transmitter and receiver while transducer is a device that converts energy from one form into another. 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 …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.The Transponder Node attaches to a target in the same fashion that a C4 charge does. Throw it a short distance to place it. Example screenshot: Node. The frequency may be changed by using the "N" key or RB for Xbox by default, and can allow for more specific tracking. The default frequency for the Transponder Tracker is 70.
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 ... . The fifth element watch
There are 3 types of AIS transponders: Class A, Class B and Class B+. They all interoperate. Class A AIS are mandated for vessels over 300 tons, fishing vessels over 15m, passenger carrying vessels and for SOLAS Convention. AIS Class B are for recreational craft installation and have a transmission power of 2W (range of about 10 miles). Transponder: When you mount the transponder inside your model you have to search for a position where the transponder has direct visibility with the bridge. Otherwise the infrared signal is not delivered to the receiver modules. The transponder can be connected directly to the radio receiver in the model.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.The GTX 328 transponder is powered on by pressing the STBY, ALT or ON keys, or by a remote avionics master switch (if applicable). After power on, a start-up page is displayed while the unit performs a self test. Mode Selection Keys OFF Powers off the GTX 328. Pressing STBY, ON or ALT Key powers on the transponder displaying the last activeTimekeeping in car racing is a tough challenge. That's why timekeepers, event organizers, and tracks from all over the world rely on MYLAPS technology. In this shop you can buy MYLAPS transponders and accessories for car racing. With a MYLAPS transponder you can use the free MYLAPS Speedhive app to check your personal results, follow races, …You will need a FasTrak® Flex switchable transponder to travel on the 405 Express Lanes to receive a carpool discount. A FasTrak® Flex switchable transponder can be purchased through the 405 Express Lanes for $15. If you plan to travel on the Los Angeles Metro Express Lanes, Express Lanes in the Bay Area, 15 Express Lanes in Riverside County ...Immobiliser sign. An immobiliser or immobilizer is an electronic security device fitted to a motor vehicle that prevents the engine from being started unless the correct key ( transponder or smart key) is present. This prevents the vehicle from being "hot wired" after entry has been achieved and thus reduces motor vehicle theft.Please have the transponder that you have purchased handy so that you may quickly complete the registration process. NOTE: On the Go Transponder registration is not available for E-ZPass accounts with a Hatem A Discount Plan. For more information, please call 1-888-321-6824. 016. Transponder Number. info. Validation Code.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]What is a transponder? A transponder is an electronic device found on aircraft that helps to identify them on air traffic control (ATC) radar screens. It is an essential component of the secondary …Sep 5, 1998 · Learn how transponders and altitude encoders work in air traffic control (ATC) radar. Find out the difference between Mode A and Mode C interrogations, the types of antennas and power used by ATC radar, and the limitations of primary radar. The article explains the basics of transponder codes, squawk 5678, and the FAA's plan to phase out primary radar. .