In RF installations, which component serves as the flexible link between equipment and the hardline?

• A. Ground Lug
• B. Adapter
• C. Jumper
• D. Fitting Connector

Answer: (C)

A short, flexible link between equipment and the rigid feedline is called a jumper. It’s a small piece of coax (or a patch cable) with matching connectors on both ends that bridges the device to the hardline while allowing movement and preventing stress on the ports. The key is impedance continuity; a properly specified jumper preserves the system’s impedance (usually 50 ohms) and keeps reflections low, even as equipment shifts or vibrations occur. This flexibility is exactly what you need when connecting a transmitter, receiver, or other equipment to a fixed, hardline run.

Ground lugs are for safe grounding, not signal transmission. An adapter changes connector types but isn’t primarily a flexible interconnection between equipment and hardline. A fitting connector isn’t the standard term for this purpose.