The R&S FSL Series from Rohde & Schwarz is a RF Spectrum Analyzer with Frequency DC to 3, 6, 18 GHz, Resolution Bandwidth 300 Hz to 10 MHz, Video Bandwidth 10 Hz to 10 MHz, DANL -117 dBm, Third Order Intercept(TOI) 10-18 dBm. Tags: Analyzer with Screen. More details for R&S FSL Series can be seen below.