2505 Clarke-Hess Multifunction Gain-Phase Analyzer

The Model 2505 is a multi-function instrument which is ideal for users that must make a large variety of sophisticated measurements. A single package, contains a Gain Phase Analyzer (Frequency Response Analyzer), Phase Angle Voltmeter with a null detector, Function Generator, Pulse Generator, Spectrum Analyzer, Digital Sampling Oscilloscope, Wattmeter, Phase Meter and Complex Impedance Bridge. These internal instruments cover the frequency range from dc (10mHz for the ac instruments) to more than 2MHz.

Each of these internal instruments may be used independently or in an internally correlated fashion. By selecting the internal Function Generator and the two Voltmeters, the user can obtain dual gain-phase data for two outputs of any network he is testing. This is particularly useful for making Bode plots to check the stability of networks having feedback. These plots can be displayed in several formats using the oscilloscope capability of the Model 2505. Because of the floating inputs, the measurements can be made across network components with neither side connected to ground.

In its Phase Angle Voltmeter (PAV) mode, the Model 2505 presents, on a single display, the total rms, the in-phase and quadrature components, the phase angle and the fundamental magnitude. An additional display provides the ratios of the various parameters. An internal null meter provides the user with the ability to make precision ratio adjustments. The specifications in this mode are superior to the specifications of all competing PAVs regardless of their cost. In addition, unlike traditional PAVs, the Model 2505 has the advantage of a built-in signal generator. All of these features make the Model 2505 ideal for synchro, resolver, RVDT and LVDT testing.