The N1913A from Keysight Technologies is a RF Power Meter & Sensor with Frequency Up to 110 GHz - U2000 Sensors 9kHz to 24 GHz, N8480 Sensors 100kHz to 50 GHz, 8480 Sensors 10 MHz to 50 GHz, Q/R/V/W8486A Sensors 26.5 GHz to 110 GHz, E441XA CW Sensors 10 MHz to 33 GHz, E9300 Sensors 9 kHz to 24 GHz, Power Range -70 to 44 dBm: U2000 Sensors -60 dBm to +44 dBm, N8480 Sensors -70 dBm to +44 dBm, 8480 Sensors -70 dBm to +44 dBm, Q/R/V/W8486A Sensors -30 dBm to +20 dBm, E441XA '-'-70 to 44 dBm: CW Sensors -70 dBm to +20 dBm, E9300 Sensors -60 dBm to +44 dBm, Dynamic Range 114 dB. Tags: Power Meter. More details for N1913A can be seen below.