NI PXI-6608 185745H-02 Timing and Synchronization Module

High-Precision Clock Generation: Built-in oven-controlled crystal oscillator (OCXO) provides a stable system clock with frequency stability up to ±1 ppm, supporting clock synchronization across multiple modules.

Multi-Device Synchronization Mechanism: Achieves nanosecond-level synchronization for multiple modules via the PXI trigger bus, external trigger signals, and dedicated synchronization interfaces, suitable for distributed testing systems.

Flexible Timing Functions: Supports programmable timers, counters, and event triggering to meet timing control requirements for high-speed data acquisition, pulse width modulation (PWM), and more.

Scenario: In aero-engine testing, synchronously control multi-channel data acquisition cards (e.g., NI PXI-5105 oscilloscope), signal generators (e.g., NI PXI-5441), and sensor interface modules to ensure consistent sampling clocks and avoid data errors caused by timing deviations.

Implementation: The NI PXI-6608 provides the system clock (100 MHz), connected to each module via star trigger lines to achieve nanosecond-level synchronization accuracy.

Scenario: Laser pulse control in semiconductor manufacturing equipment requires precise timing between laser triggering and workpiece stage movement.

Implementation: Use the module's timer to generate PWM signals, adjust pulse width (with nanosecond-level resolution), and synchronize mechanical actions via external triggers.

Scenario: Large-scale structural health monitoring systems need to synchronously collect vibration, strain, and other signals at different locations.

Implementation: Use the NI PXI-6608 as the master clock source, connecting remote chassis via long-distance synchronization lines (e.g., fiber optics) to eliminate cumulative errors from clock drift.

NI-DAQmx Driver: Compatible with platforms like LabVIEW, Python, C++, and MATLAB, providing low-level APIs for clock configuration, trigger setup, and timer programming.

NI MAX: Hardware configuration tool supporting clock calibration, trigger routing setup, and system self-test, enabling intuitive management of multi-module synchronization topologies.

Synchronization Manager: Dedicated software tool for configuring multi-module synchronization links and generating timing diagrams to verify synchronization accuracy.

Clock Reference Expansion: Pair with the NI PXI-6652 atomic clock module to further enhance clock stability (±0.001 ppm), suitable for long-duration high-precision testing scenarios.

Long-Distance Synchronization: Use the NI PXI-6624 fiber optic synchronization module to extend synchronization signal transmission to kilometer levels, supporting distributed testing networks.

Anti-Interference Design: Use shielded cables for trigger lines and split ground planes (separate analog and digital grounds) to reduce electromagnetic interference (EMI) affecting clock accuracy.

Phase Calibration: Use clock phase adjustment functions provided by NI-DAQmx to manually compensate for clock delays between modules, ensuring synchronization errors <1 ns.

Redundant Clock Design: Configure dual clock sources (e.g., OCXO + external clock) with hot-swapping support to avoid system desynchronization due to single clock source failures.