The National Instruments PXI-6123 is a simultaneous sampling data acquisition card for PXI systems. It provides 16 bit analog input with simultaneous sampling across channels, along with analog output, digital I O, and counter functions. The card is designed for dynamic signal analysis, vibration measurement, acoustic testing, and automated test applications that require correlated multi channel data.
Simultaneous sampling means that each analog input channel captures data at the same instant. This preserves phase relationships between signals and avoids channel to channel time skew. Engineers can compare waveforms, measure phase differences, and analyze multi sensor systems with confidence.
Simultaneous Analog Input
The PXI-6123 provides simultaneous analog input channels with 16 bit resolution. The input range and sample rate can be configured for different signal types. Simultaneous sampling is important when analyzing dynamic signals, transients, and phase relationships.
For multi channel acquisition, engineers should consider sample rate, record length, and triggering. High throughput supports transient capture and frequency analysis. Proper wiring and grounding help maintain signal quality.
Analog Output and Digital I O
The card includes analog output channels for stimulus generation and control. Digital I O lines support status monitoring, relay control, and communication with digital devices. Counter functions support event counting, pulse generation, and frequency measurement.
These functions can be synchronized with analog acquisition. Engineers should plan timing and triggering for correlated measurements.
PXI Integration and Timing
The PXI-6123 uses the PXI backplane for communication and timing. PXI systems provide a modular platform for instrumentation and data acquisition. The backplane supports triggers and clocks that can coordinate multiple modules.
Engineers should verify chassis compatibility, slot assignment, and power budget. The module should be installed in a chassis with adequate cooling.
Software and Driver Support
The card is designed to work with NI data acquisition software and standard programming environments. Engineers can configure channels, create tasks, set timing, and read data using supported drivers and APIs.
Software configuration includes input range, sample rate, trigger source, and data transfer method. Documentation and examples help reduce setup time.
Applications
The PXI-6123 is suited to dynamic signal analysis, vibration monitoring, acoustic measurement, power measurement, and automated test. It supports correlated multi channel acquisition in a PXI system.
Installation and Maintenance
Installation requires a compatible PXI slot, driver installation, and connection of field wiring or terminal blocks. Proper grounding and shielding help maintain signal quality. The chassis should provide adequate cooling.
Maintenance includes checking cable connections, verifying channel configuration, and confirming calibration status. Documentation helps repeatability.
Summary
The National Instruments PXI-6123 Simultaneous Sampling DAQ Card provides 16 bit correlated analog input with analog output, digital I O, and counters for PXI systems. It supports dynamic signal analysis, vibration measurement, and automated test. The PXI-6123 is a practical DAQ card for engineers who need simultaneous multi channel acquisition.
