Agilent E4407B Spectrum Analyzer, Frequency Range: 9kHz - 26.5 GHz. The Agilent ESA-E Series (E4407B) is our mid-performance spectrum analyzer solution for the future. The series sets the performance standards in measurement speed, dynamic range, accuracy, and resolving power for similarly priced products. Its flexible platform design enables R&D, manufacturing, and field service engineers to customize the product to meet specific testing needs and to upgrade the product with new features when required. The products' selection of one button measurement solutions combined with its easily navigable user interface and performance in speed allows engineers to spend less time testing and more time designing, building, and troubleshooting components and products.