ABSTRACT: This is the user guide of the Maury Microwave BNC (75 Ohm) Coaxial Calibration Kit for model 8580CK10. The 8580CK10 series of BNC 75 ohm coaxial calibration kits is designed to provide accurate calibrations of network analyzers in the DC to 12 GHz range. Each of these kits includes all the necessary calibration standards for the accurate calibration of most network analyzers.