The N9038B from Keysight Technologies is a RF Spectrum Analyzer with Frequency 3 Hz to 44 GHz, Frequency Resolution 1 Hz to 8 MHz, Analysis Bandwidth 85 MHz, Real Time Bandwidth 25, 85 MHz, Video Bandwidth 1 Hz to 3 MHz, 4, 5, 6, 8 MHz. Tags: Analyzer with Screen. More details for N9038B can be seen below.