The R&S®ESR26 from Rohde & Schwarz is a RF Spectrum Analyzer with Frequency 9 kHz to 26.5 GHz, Frequency Resolution 10 Hz to 10 MHz, Resolution Bandwidth 10 Hz to 10 MHz, Attenuation Range 0 to 50 dB, P1dB 3 dBm. Tags: Analyzer with Screen. More details for R&S®ESR26 can be seen below.