Agilent/HP / Step Attenuator / 8495B/001 dc to 18GHz 0 to 70dB / 10dB Step Insertion loss 0.4dB + 0.07dB/GHz Maximum SWR 1.35 (1.35 to 8GHz, 1.5 to 12.4GHz, 1.7 to 18GHz)