NI PXIe-5451 400 MS/s Two-Channel Arbitrary Waveform Generator

NI PXIe‑5451 is a high-performance two-channel arbitrary waveform generator designed for demanding test and measurement systems. Featuring a sampling rate of 400 MS/s, 16-bit resolution, ±2.5 V output range, and a bandwidth of 145 MHz, this PXIe AWG module delivers exceptional precision for engineering, R&D, defense, semiconductor, and RF applications 

Core Specifications

Feature Highlights

1. High Sampling Rate & Bandwidth

• 400 MS/s update rate and 145 MHz analog bandwidth guarantee high-definition waveform fidelity.
• Supports I/Q baseband or medium-IF generation, making it ideal for RF design systems and vector signal applications.

2. Dual-Channel, Differential Outputs

• Two fully synchronized DAC channels (CH0, CH1) support differential (±) and single-ended operation.
• Supports I/Q waveform generation or dual-signal output with phase coherence.

3. Multiple Operating Modes

• Arbitrary mode: Generate single user-defined waveform
• Script mode: Programmable loops, triggers, markers
• Sequence mode: Segment-based waveform playback with markers

4. Extensive Memory Options

• Choose from 128 MB to 2 GB, supporting:
  • Long continuous waveforms (e.g., 1 GB can store 268M samples per channel)
  • Complex multisegment scripts and signal patterns

5. Precision Trigger & Marker Control

• 4 analog markers + 2 digital data markers per channel
• Trigger types include PFI/NIM, PXI_TRIG, or software, with thresholds as low as 25 ns.

6. Advanced Clocking & Synchronization

• Fully integrated PXI/SMC architecture enables:
  • Phase-coherent synchronization across multiple modules (PXI_CLK10)
  • External clock input/output (1–400 MHz)
  • Clock delay alignment in 10 ps resolution.

7. Software Control & Calibration

• Compatible with NI‑FGEN driver, LabVIEW, C/C++, Measurement Studio, and SignalExpress.
• Supports self-calibration in ~60 seconds; external calibration recommended annually.

Technical Performance

Frequency Response & Spur Levels

• Anti-imaging filter optimized for 400 MS/s
• Out‑of‑band spurious signals: <–65 dBm (0–20 MHz), <–45 dBm (20–50 MHz).

Harmonic Distortion (THD)

• 16‑bit accuracy, THD:
  • ~–71 dBc at 10 MHz
  • ~–51 dBc at 120 MHz
  • ~–50 dBc up to 160 MHz

Crosstalk Performance

• Crosstalk between channels:
  • –90 dBc at low amplitude (0–150 MHz)
  • Approx. –80 dBc up to 200 MHz.

Clocking & Synchronization

• Master clock: Onboard oscillator or external
• Distribute clocks/triggers via PXI backplane or front panel (SMA/SMB)
• Clock alignment accuracy: ~10 ps resolution and ±1 sample timebase.

Electrical & Environmental Specs

• Power: ~37.5 W (typical), <41.4 W (max)
• Operating temperature: 0‑55 °C
• Dimensions: 3U, two-slot PXIe module (21.6 × 4.0 × 13.0 cm); weight ~550 g.

Signal Modes & Control

• Waveform Modes:
  • Arbitrary – single waveform
  • Script – loops/markers
  • Sequence – segment-based playback

• Triggering:
  • Start, script, software triggers
  • Min pulse width: 25 ns

Clock & Timing

• Sample clock – internal/external up to 400 MHz
• Reference clock – 1–200 MHz, 0.01 % accuracy
• Delay adjustments: 0‑2 ns per channel, 10 ps resolution.

Frequently Asked Questions

What is the NI PXIe-5451 400 MS/s Two-Channel Arbitrary Waveform Generator?

The NI PXIe-5451 is a high-speed, dual-channel arbitrary waveform generator (AWG) designed for precise signal generation in automated test and measurement environments. It operates at a maximum sample rate of 400 MS/s with 16-bit resolution.

What are the main applications of the NI PXIe-5451?

This module is ideal for applications such as RF testing, wireless communication prototyping, radar signal simulation, and high-speed digital testing. It’s also widely used in defense, aerospace, semiconductor, and academic research labs.

How many channels does the PXIe-5451 support?

The NI PXIe-5451 supports two fully independent and synchronized output channels, allowing users to generate complex waveforms simultaneously.

What sample rate does the NI PXIe-5451 support?

It provides a maximum sample rate of 400 MS/s (mega samples per second), making it suitable for high-speed and high-resolution waveform generation.

What resolution does the PXIe-5451 offer?

The NI PXIe-5451 features 16-bit vertical resolution, ensuring fine amplitude control and high signal fidelity for accurate waveform reproduction.

Is the PXIe-5451 compatible with LabVIEW?

Yes, the NI PXIe-5451 is fully compatible with LabVIEW and the NI-FGEN driver, enabling seamless integration into automated test systems and custom software applications.

Can the PXIe-5451 be synchronized with other PXI modules?

Absolutely. The PXIe-5451 supports T-Clock and PXI trigger lines for precise synchronization with other instruments in a PXI chassis, making it ideal for multi-instrument, time-coordinated test setups.

Does this module support arbitrary waveform playback?

Yes, the PXIe-5451 supports both predefined and user-defined arbitrary waveforms, making it versatile for simulating real-world or complex signal behaviors.

What is the output connector type on the PXIe-5451?

The front panel of the PXIe-5451 uses SMA connectors for signal output, ensuring reliable and high-frequency performance.

What is the form factor of the PXIe-5451?

The device is a PXI Express (PXIe) module, designed to be installed in a PXIe chassis, allowing high bandwidth and low-latency data transfer.

Can I use this AWG for RF signal generation?

Yes, while not an RF vector signal generator per se, the high sample rate and resolution of the PXIe-5451 make it suitable for baseband and modulated RF signal generation when paired with upconverters or used in software-defined radio systems.

What software tools are required to operate the PXIe-5451?

You will need NI LabVIEW, NI-FGEN drivers, and optionally NI TestStand for automated testing environments. It can also be controlled using C, C++, or Python through NI’s software APIs.

What kind of memory or waveform depth does it offer?

The PXIe-5451 includes onboard waveform memory, enabling the storage and fast playback of complex signals. Exact memory size may vary based on the configuration.

Is the NI PXIe-5451 suitable for production testing?

Yes, it is engineered for both R&D and high-throughput production testing, offering fast switching, repeatable waveform output, and reliable synchronization.

How does the PXIe-5451 compare to traditional benchtop waveform generators?

Compared to traditional benchtop AWGs, the PXIe-5451 offers faster performance, modular scalability, and tighter synchronization in a compact PXI Express form factor, making it ideal for complex, multi-channel automated test setups.