Tektronix Inc's 2642A Fourier Analyzer combines arbitrary wave-form generation functions with analyses of time-domain waveforms, spectra and electrical networks. The system is equipped with a frequency range of 200 khz and two to four input channels. It can handle in excess of 90 decibels input dynamic range and up to 150 decibels for network measurements. It also has a 90-decibel-spectral purity signal generator that allows programming to suit the user's needs.