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장 비 명
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Multifunction Module
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모
델 명
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DCX-127
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제
조 사
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Audio-precision
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장비 사양 |
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DCX-127 Multifunction Module
The DCX-127 Multifunction Module comprises an interface tool kit of frequently-requested non-audio functions and interface that may be required in conjunction with 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-to-D and D-to-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.
The DCX-127 functions include:
DC voltage and resistance measurements autoranging from 200 mV to 500 V and 200 ohms to 2 Meg ohms full scale, fully floating and guarded for accurate measurements in the presence of large common mode voltages. Readings can be offset and scaled by the software.
Resistance measurements using either 4-wire or 2-wire techniques.
Two independently programmable bipolar floating dc voltage outputs, each with a ±10.5 V range, 20 mV resolution and monotonicity to 40 mV (19 bits). The software can sweep either dc source.
Digital input of static or low-speed parallel input, word width up to 21 bits. Digital output of a parallel digital word of 21 bits.
A simplified 8-bit program control interface that can be defined to execute any pre-defined keystroke sequence. This can be used to run different software procedures based upon switch closures.
All the DCX-127 output functions are controlled from APWIN software, and all of the inputs are displayed in APWIN software and may be displayed as bargraphs or plotted values during a sweep when appropriate.
The DCX-127 Multifunction Module is a separate unit packaged in a one-rack-unit high case that may be rack-mounted or used as a bench instrument.
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