The R&S®ESR7 from Rohde & Schwarz is a RF Spectrum Analyzer with Frequency 9 kHz to 7 GHz, Frequency Resolution 10 Hz to 10 MHz, Resolution Bandwidth 10 Hz to 10 MHz, Attenuation Range 10 dB, P1dB 3 dBm. Tags: Analyzer with Screen. More details for R&S®ESR7 can be seen below.