ADS-B Out often shares a system with the transponder; issues with one can affect the other.

• A. True
• B. False
• C. Not related
• D. Only ADS-B is affected

Answer: (A)

ADS-B Out and the transponder are often built around a common hardware path, sharing processor resources, wiring, and sometimes the same antenna. Because they rely on that shared setup, a fault in the hardware or wiring used by one can pull the other down as well. For example, a power or grounding problem, a failing data bus, or a shared antenna issue can prevent both ADS-B Out transmissions and transponder replies from functioning correctly. Likewise, if ADS-B Out isn’t getting accurate position data from the GPS/air data system, the broadcasts may be incorrect or fail certification checks, even if the transponder itself is technically okay. So, it’s common for problems to affect both systems due to their intertwined hardware and data paths.