Keysight (Agilent) N4690B Electronic Calibration Module (ECal), 3.5 mm, 2-Port, DC to 26.5 GHz Product Highlights Precision 2-port microwave ECal module with high calibration accuracy Frequency coverage from 300 kHz to 26.5 GHz, or DC to 26.5 GHz when Option 0DC is fitted Fast, easy and accurate full two-port calibration of vector network analyzers 3.5 mm test ports available in female/female, male/male and male/female configurations Direct USB control from Keysight PNA and