The PDA 1000 portable disturbance analyzer system combines three analyzers into one. The unit is a disturbance analyzer which records surges and sages for all voltage and current channels. It is a data logger which logs three months` worth of historical data logging with on-board mass memory. It is also a harmonic analyzer, meaning it is a real-time analyzer of harmonics to the 31st order including spectrum analysis. The unit stores all data and waveform analysis in on-board mass memory. With the PDA 1000 there is no need for a laptop computer at the site.