The 6440B Precision Component Analyzer providea thorough and accurate testing of any passive component to high resolution. In particular, for capacitor manufacturers, the instrument provides capabilities for both fast automatic production testing and complete design characterisation. Users include designers of passive components, manufacturing test, designing and testing materials as well as circuit designers who are evaluating component characteristics. The resonant frequency can be automatically calculated for any component together with its equivalent series or parallel circuit at that frequency. This instrument is designed for high performance testing of components, with a basic accuracy of 0.02%, at a low price. The 6430B is the entry level instrument covering to 500 kHz while the fully featured 6440B covers to 3 MHz.