The E4402B ESA-E from Keysight Technologies is a RF Spectrum Analyzer with Frequency 100 Hz to 3.0 GHz, Resolution Bandwidth 10 MHz, DANL -166 dBm, Third Order Intercept(TOI) +16 dBm, Phase Noise -101 dBc/Hz. Tags: Analyzer with Screen. More details for E4402B ESA-E can be seen below.