Product Short Description
Product Name
PXI-6123 8-Channel 16-Bit 500 kS/s/ch Simultaneous Sampling Multifunction DAQ Module
Product Overview
The PXI-6123 is an S Series simultaneous-sampling multifunction DAQ module. All analog input channels convert at the same time, making it suitable for phase-sensitive and multichannel waveform measurements.
Description
Technical Specifications
- Analog Input Channels: 8
- ADC Resolution: 16 bits
- Sampling Mode: Simultaneous sampling
- Maximum Sample Rate: 500 kS/s per channel
- Input Impedance: 100 MΩ || 10 pF
- Overvoltage Protection: ±36 V
- Digital I/O Lines: 8
- Counter/Timers: 2 × 24-bit
- Input FIFO: 16 MS or 32 MS
- Phase Mismatch: ±0.1° at 100 kHz
- Operating Temperature: 0 °C to 55 °C
Functional Features
- True simultaneous sampling on all AI channels
- High input impedance
- Large onboard FIFO for continuous acquisition
- Digital triggering
- Multidevice synchronization through PXI timing and trigger buses
- NI-DAQmx programming support
Working Principle
Each analog input channel is sampled by its own ADC path at the same clock edge. Digital data is buffered onboard and transferred to the controller through DMA, preserving phase relationships between channels.
Application Scenarios
- IF digitization
- Transient recording
- Telecom manufacturing test
- Ultrasound testing
- Sonar testing
- High-energy physics
- Multichannel waveform acquisition
Installation Requirements
- Install in standard PXI chassis
- Use shielded multicontact cable and compatible NI terminal block
- Install NI-DAQmx
- Configure sampling clock and trigger sources carefully
- Maintain chassis airflow
Usage Notes
- Do not measure Category II, III, or IV mains circuits
- Allow system warm-up before high-accuracy measurements
- Avoid input voltages beyond ±36 V
- Use simultaneous sampling only when clock and trigger routing are correctly configured
- Perform calibration as recommended
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