The 35660A Dual-Channel, Dynamic Signal Analyzer is an FFT-based instrument that provides spectrum and network measurements in electronics, mechanical test, acoustics, and other low frequency application areas. The analyzer also offers built-in test and automation features, traditionally available only with a computer. The unit performs spectrum analysis from 488?Hz to 102.4kHz and network analysis from 244?Hz to 51.2kHz. The FFT provides 401 lines of resolution in both one- and two-channel modes.