Keysight (Agilent/HP) 85025E

Detector head, frequency range 0.01 - 26.5 GHz, connector 3.5 mm (m). Exclusively suitable for use with the AGILENT 8757 D scalar network analyzer (not compatible with AGILENT 8756 or 8755). For measuring either modulated (AC) or unmodulated (DC) microwave signals. DETECTOR HEAD 10 MHz - 26.5 GHz