Different types of instruments or RF cables use different connectors. The same polarity requires different RF connectors to be connected. It is simple to distinguish between the male connector and the female connector, the female connector to the male connector, and the male connector to the female connector. The connector has a partial impedance characteristic. , working frequency, joint form and other applications are more diverse, two-hole and four-hole plate seat type adapter can be connected to the panel, lock screw for aluminum shell