Agilent E4401B ESA-E Series Spectrum Analyzer 1MHz-1.5GHzAgilent E4401B ESA E Series Spectrum Analyzer 1MHz1. 5GHz The Agilent E4401B ESA E Series is a general purpose spectrum analyzer offering high performance for RF signal analysis across a 1 MHz to 1. 5 GHz range. It delivers excellent measurement accuracy, wide dynamic range, and flexible functionality for both lab and field testing. Key Specifications Frequency Range: 1 MHz to 1. 5 GHz Resolution Bandwidth (RBW): 1 Hz to 1 MHz Amplitude Range: 145 dBm