The Keysight 85038A is a mechanical calibration kit for the frequency range from DC to 7.5 GHz (usable up to 8 GHz) that contains precise calibration standards with 7-16 connectors (male and female). It is ideal for calibrating network analyzers such as the ENA and PNA series for measurements on high frequency components with 50 Ohm 7-16 connectors used in modern communication systems such as base stations, amplifiers and duplexers.