USB, 9 GHz, 2-port Automatic Calibration Module—The ACM2509 Automatic Calibration Module provides support for Copper Mountain Technologies vector network analyzers, such as the PXIe-S5090 PXI Vector Network Analyzer. Additionally, the ACM2509 Automatic Calibration Module features a one-step calibration process that lowers the total connection count on RF cables, which in turn reduces the risk of interventions and human error.