The Audio Precision DCX-127 Multifunction Module provides Audio Precision’s PC-controlled Audio Analysers with an interface toolkit of non-Audio functions and interface capabilities that are often required in typical Audio test applications.
The module contains a 4-1/2 digit DC voltmeter-ohmmeter, two 20-bit programmable DC voltage sources, 21 bits of digital I/O, and three 8-bit programmable auxiliary output ports for device control or status indicators. Typical applications include VCA gain control linearity, VCA distortion, amplifier DC offset and power supply checks, power amplifier load switching control, loudspeaker voice coil resistance measurements, temperature measurements, test fixture control, and testing DC parameters of A/D and D/A converters.
The DCX-127 also provides pulses and DC levels whose timing depend upon key software actions such as end of sweep, analyzer channel selection, or data settling. These may be used for synchronization and sequencing of external devices or portions of the test system such as the triggered sine burst generator.
All DCX-127 output functions are under analyzer software control, and all of the inputs are displayed in the control software and can be displayed as bar graphs or plotted values during a sweep when appropriate