Why must bnc terminator be grounded?

A BNC terminator must be grounded to ensure signal integrity and minimize reflections in the transmission line. Grounding provides a reference point for the signal, helping to maintain a stable and consistent electrical environment. This is especially important in high-frequency applications, where ungrounded terminators can lead to increased noise and signal degradation. Proper grounding also helps to prevent electrostatic discharge and potential damage to connected equipment.