Characteristic impedance is another signal integrity property that is typically measured to characterize the performance of a connector system. The differential characteristic impedance of the UHM socket was designed to match 100 Ohm environments, which are typical of high speed serial protocols. When mated to a HM header, the test shows the impedance profile of the UHM socket to be approximately 100 ohm including the via of the socket at 33 picosecond rise time.