The E4408B-BAS ESA-L from Keysight Technologies is a RF Spectrum Analyzer with Frequency 26.5 GHz, Resolution Bandwidth 100 Hz to 5 MHz, DANL -130 dBm, Third Order Intercept(TOI) +7.5 dBm, Phase Noise -94 dBc/Hz. Tags: Analyzer with Screen. More details for E4408B-BAS ESA-L can be seen below.