RF adapters are commonly used to change gender or as connector savers in precision test and measurement applications. They are also used to transfer signals between connector interfaces. Coaxial adapters are available in 50 ohm and 75 ohm designs. Standard polarity and reverse polarity Jack to Jack, Plug to Jack and Plug to Plug adapters are available across most rf interfaces. The polarity of an interface can be changed by changing the center contact from male to female or female to male depending on the adapter interface.