Noise Source 10MHz-18GHz, BNC (f) Input Bias / 3.5mm (m). ENR: 15dB. For General Purpose Measurements. Unit sold with a valid calibration certificate and with 12 months warranty. The Agilent (now Keysight) 346B noise source is the ideal companion to Agilent's noise figure solutions. Since it is broadband (10 MHz to 18 GHz), it eliminates the necessity for several sources at different frequency bands. The low SWR of the noise source reduces a major source of measurement uncertainty; reflections of test signals. The 346B's high ENR, low SWR, and variety of connectors make it a general-purpose noise source. Add special option H01 for high ENR (21 dB typical) to measure high noise figure devices, or option H42 for measuring Direct Broadcast Satellite (DBS) low noise block converters. Features: Low SWR for reducing noise figure (NF) measurement uncertainty Individually calibrated ENR values at specific frequencies to enhance accuracy Calibration supplied on floppy disk for easy loading into NFA-series noise figure analyzers