HP Agilent 1250-1746 APC-7 To 3.5 mm Male Precision Grade Calibration AdapterHP Agilent 1250 1746 APC 7 to 3. 5 mm Male Precision Grade Calibration Adapter The HP Agilent 1250 1746 is a precision RF calibration adapter designed to provide an accurate transition between APC 7 and 3. 5 mm male connectors. Manufactured to metrology grade standards, it ensures minimal insertion loss, excellent return loss, and high repeatability, making it ideal for calibration of vector network analyzers (VNAs) and other RF test equipment. Key