ESG-AP RF Signal Generator 250kHz-3GHz The Agilent (now Keysight) E4425B is a RF Signal Generator of the ESG-AP series and provides outstanding phase-noise performance and analog modulation features for all general-purpose test needs. It offers excellent performance with superior quality and reliability at an affordable price. The E4425B provides analog modulation capabilities, including AM, FM, phase modulation and pulse modulation. It is ideally suited to meet the demanding requirements of receiver test, component test and local oscillator application. High spectral purity Flexible architecture, upgrade paths for options Choice of electronic or mechanical attenuator Superior level accuracy Wideband FM and Phase Modulation, AM and Pulse Modulation Step sweep (frequency, power and list) Built-in function generator