Agilent/HP / Power Meter / E4419B 
Compatible power sensors: E4410 and E9300 E-Series, 8480 Series and N8480 Serie s average power sensors Frequency range: 9 kHz to 110 GHz, sensor dependent Power range: ?70 dBm to +44 dBm(100 pW to 25 W), sensor dependent Single sensor dynamic range: 90 dB maximum (E-Series sensors) 50 dB maximum (8480 Series sensors) 55 dB maximum (N8480 Series sensors) Display units: Absolute: Watts or dBm / Relative: Percent or dB Display resolution: Selectable resolution of 1.0, 0.1, 0.01, and 0.001dB in Log mode, or 1 to 4 digits in linear mode