KEYSIGHT N4431B Electronic Calibration Module (9 kHz ~ 13.5 GHz, 3.5 mm or Type-N 50 Ω)

Frequency Range: 9 kHz to 13.5 GHz or 9 kHz to 7.5 GHz (with 7-16 connector options)

Connector types: 3.5 mm or Type-N 50 Ω or 7-16 or mixed connectors

Datasheet