The ETST400M6G-1K from Etrontimes Technology is a RF Spectrum Analyzer with Frequency 0.4 to 6 GHz, Resolution Bandwidth 0.1 to 10 MHz, Analysis Bandwidth 50 MHz, Video Bandwidth 0.1 to 10 MHz, DANL -70 to -40 dBm/Hz. Tags: Analyzer with Screen. More details for ETST400M6G-1K can be seen below.