About the Agilent - Keysight E4404B

The Agilent (Keysight) E4404B is a compact, reliable spectrum analyzer designed for RF testing, signal analysis and troubleshooting from low‑frequency to microwave bands. With intuitive controls and advanced measurement features it suits lab benches and field service environments, offering fast sweep performance, clear spectral display and a broad set of demodulation and marker tools for efficient signal characterization.