The PXIe-8399 is a high-performance MXI-Express remote controller module developed by National Instruments for extending PXI Express (PXIe) systems to an external workstation or server through high-speed PCI Express communication.
Instead of using an embedded PXI controller, the PXIe-8399 enables engineers to leverage the processing power, memory capacity, GPU acceleration, and storage resources of modern desktop workstations while maintaining deterministic communication with PXI instrumentation.
The PXIe-8399 is ideal for applications requiring high data throughput, low latency, and scalable modular instrumentation.
Typical applications include:
- Automated Test Equipment (ATE)
- Semiconductor testing
- RF and wireless communication validation
- High-speed data acquisition
- Aerospace and defense testing
- FPGA-based measurement systems
- Radar and electronic warfare research
- Multi-chassis PXI systems
High-Speed MXI-Express Architecture
The PXIe-8399 extends the PCI Express bus from the host PC directly into the PXI Express chassis.
Key Features
| Specification | Description |
|---|---|
| Interface Type | MXI-Express (PCI Express Extension) |
| Bus Interface | PXI Express |
| Communication | High-bandwidth PCIe |
| Latency | Ultra-low latency |
| Chassis Support | Single or multiple PXIe chassis |
| Software Support | NI MAX & PXI Platform Services |
This architecture allows PXI modules to appear as local PCI Express devices to the operating system.
Workstation-Class Computing Performance
One of the primary advantages of the PXIe-8399 is the ability to use external computing resources.
Benefits include:
Powerful Multi-Core CPUs
Run complex automated test sequences efficiently.
GPU Acceleration
Support AI inference, image processing, and RF signal analysis.
Large Memory Capacity
Process and buffer high-speed data streams.
High-Speed Storage
Record large waveform datasets directly to NVMe SSDs.
This flexibility makes the PXIe-8399 ideal for compute-intensive applications.
High-Bandwidth Data Streaming
The PXIe-8399 is designed for continuous high-speed communication between the host PC and PXI instrumentation.
Advantages include:
High PCIe Throughput
Transfer large datasets efficiently.
Low Communication Latency
Improve synchronization between instruments.
Stable Continuous Streaming
Support long-duration measurements.
Deterministic Performance
Maintain timing accuracy for automated testing.
These capabilities are especially valuable when using high-speed digitizers, oscilloscopes, and RF instruments.
Multi-Chassis PXI Expansion
The PXIe-8399 supports scalable test system architectures.
Applications include:
Semiconductor Production Testing
Expand measurement capacity with multiple PXI chassis.
RF Validation Systems
Connect numerous RF instruments under one controller.
Large Switching Systems
Manage hundreds of switching channels.
Data Acquisition Systems
Synchronize distributed measurement hardware.
Multi-chassis capability allows engineers to expand systems without redesigning software.
RF and High-Speed Instrumentation
The PXIe-8399 is commonly deployed with:
- PXIe-5841
- PXIe-5172
- PXIe-7976R
- PXIe oscilloscopes
- PXIe arbitrary waveform generators
Typical applications include:
5G and 6G Research
Wideband RF signal generation and analysis.
Radar Development
Real-time waveform capture and processing.
FPGA-Based Signal Processing
Custom hardware acceleration.
Electronic Intelligence
Wideband RF monitoring and recording.
Software Integration
The PXIe-8399 supports:
- NI MAX
- PXI Platform Services
- LabVIEW
- TestStand
- Python
- C/C++
- .NET
The software ecosystem provides:
- Automatic hardware discovery
- Simplified system configuration
- Deterministic instrument synchronization
- Rapid automated test development
Comparison with Similar NI MXI-Express Controllers
| Model | Main Difference | Best Use |
|---|---|---|
| PXIe-8246 | Earlier MXI generation | General PXI expansion |
| PXIe-8399 | Newer high-bandwidth architecture | Advanced PXIe systems |
| PXIe-8381 | Alternative remote expansion solution | High-performance automation |
| PXIe-8881 | Embedded PXI controller | Standalone PXI systems |
Compared with embedded PXI controllers, the PXIe-8399 provides greater computing flexibility by utilizing modern external workstations. It is particularly well suited for applications requiring high processing performance and scalable instrumentation.
Why Engineers Choose PXIe-8399
Engineers select the PXIe-8399 because it offers:
- High-speed PCI Express communication
- Low-latency PXI control
- Workstation-class computing performance
- Multi-chassis scalability
- Reliable RF data streaming
- Excellent compatibility with PXI Express instruments
- Easy integration with the NI software ecosystem
- Long-term platform scalability
Conclusion
The PXIe-8399 is a powerful remote PXI Express controller that combines high-bandwidth PCI Express communication with the flexibility of external workstation computing.
Its combination of:
- High-speed MXI-Express connectivity
- Low-latency communication
- Multi-chassis expansion
- Excellent RF and FPGA compatibility
- Seamless NI software integration
- Scalable PXI Express architecture
- Reliable automated test performance
makes it an excellent solution for semiconductor testing, RF validation, aerospace research, industrial automation, and large-scale automated measurement systems.
