Agilent E4404B

This used Agilent E4404B ESA-E series spectrum analyzer covers frequencies up to 6.7 GHz and has long been a workhorse instrument in RF test labs. It is well suited for general purpose spectrum analysis, component testing, and communications signal verification. The unit offered here has been functionally tested and confirmed to power on and sweep correctly. The E4404B is valued for its intuitive front panel operation and its solid measurement accuracy across a wide dynamic range, making it suitable for both educational and industrial applications. It supports common measurement personalities for tasks such as adjacent channel power and occupied bandwidth analysis, which are frequently required in wireless system testing. Many technicians appreciate its balance of capability and ease of use compared to more complex modern analyzers. The instrument is sold in used condition with normal wear consistent with years of bench service. It is a practical choice for labs seeking a proven, mid range spectrum analyzer without the expense of newer models. Calibration status and included accessories can be confirmed at the time of sale.