The NI PXI-5404 is a high-performance, single-channel waveform generator module developed by National Instruments (NI) for the PXI platform. Leveraging Direct Digital Synthesis (DDS) technology, it specializes in generating precise sine waves and clock signals, making it ideal for automated test systems (ATE), design validation, and signal simulation scenarios . Below is its comprehensive detail:
- Brand: National Instruments (NI)
- Model: PXI-5404
- Platform Compatibility: PXI (uses PXI Hybrid bus connector)
- Product Type: Single-channel waveform/clock generator
- Part Number: 778577-02
- Key 定位: High-precision frequency generator for test and measurement systems
- Software Compatibility: Supported by NI-FGEN instrument driver (compliant with IVI specifications), compatible with LabVIEW, LabWindows/CVI, Visual Basic, and Visual C++
The module integrates two output interfaces—Sine Out and Clock Out—with tightly coupled functionality :
- The TTL signal at Clock Out is derived from the Sine Out waveform, so both terminals share the same frequency and phase (cannot generate independent frequencies).
- Amplitude and duty cycle can be configured independently for each terminal: Sine Out amplitude is adjusted when generating sine waves, while Clock Out’s TTL level (1.8V/3.3V/5V) and duty cycle are set when generating square waves.
- Configuration settings for each terminal are preserved when switching waveform types, enabling separate parameterization in a single session .
- Bi-directional PFI 0 Connector: Accepts external triggers to start waveform generation, or routes internal signals (e.g., Clock Out, divided sample clock, PXI Star trigger) to external devices .
- RTSI Line Support: Routes signals to/from PXI trigger bus—can act as a clock source for other system devices or receive triggers from external modules (note: RTSI lines do not support signals above 20 MHz) .
- High signal integrity: 12-bit resolution and ±0.2 dB amplitude accuracy ensure low-noise, stable output for critical measurements .
- External calibration: Allows verification and adjustment of onboard clock frequency, sine amplitude, and square wave duty cycle accuracy .
- Operates in standard function mode only (configured via NI-FGEN), supporting adjustments to waveform type, frequency, amplitude, DC offset, start phase, and duty cycle .
- Offline programming: NI-FGEN’s simulation mode enables application development without connecting hardware .
The NI PXI-5404 is widely used in test, measurement, and automation scenarios requiring precise frequency signals:
- Automated Test Systems (ATE): Serves as a flexible clock source for continuous sampling, functional testing, and board-level validation .
- Communications Testing: Generates reference clocks for wireless communication module calibration and signal protocol verification .
- Design Validation: Simulates sine wave inputs for sensor, amplifier, and filter characterization .
- System Synchronization: Provides synchronized clock signals for multi-device setups (e.g., coordinating digitizers, data acquisition modules, and actuators) .
- Educational & Research: Used in signal processing labs for waveform analysis and algorithm testing .
