HP Agilent 8471D 100 kHz – 2 GHz, Neg Polarity, BNC (M-F) Diode Detector Tested! HP / Agilent / Keysight 8471D. Diode Detector. 100 kHz to 2 GHz, 100 mW Max Input. BNC (M-F). Negative Polarity, 1.46 Max SWR. byJuly 5, 2026