ECal modules are transfer standards capable of transferring the factory calibration accuracy to your network analyzer. The new 85093C RF electronic calibration system is now easily controlled by one of two methods depending on the network analyzer. The Agilent PNA and ENA series of network analyzers controls the module directly through a USB interface. The Agilent 8753E/ES/ET network analyzers require an 85097B interface kit to control the module.