The National Instruments PXI-6653 is a high-performance PXI Timing and Multi-Chassis Synchronization Module designed for precise timing applications. It features an onboard high-stability Oven-Controlled Crystal Oscillator (OCXO) and a star trigger controller that ensures low-skew triggering precision. The module integrates advanced routing capabilities for trigger and clock signals, allowing users to generate and route these signals efficiently from a single location. The front panel is equipped with multiple connectors, including a CLKOUT Connector, a CLKIN Connector, six PFI Connectors, an Access LED, and an Active LED, enabling flexible I/O configurations.

The PXI-6653 supports configurable PFI connections that can function as either inputs or outputs, further enhancing its adaptability in various applications. This module consumes a maximum of 2 A at +5 V, 600 mA at +3.3 V, and 500 mA at +12 V while requiring one 3U PXI slot for installation. Weighing approximately 203 g, it is designed for a temperature operating range of 0 °C to 55 °C and a storage range of -20 °C to 70 °C, with permissible random vibration levels of 0.3 grms (operating) and 2.4 grms (non-operating) across a frequency range of 5 to 500 Hz.

The PXI-6653 enables the user to route a 10 MHz clock from the CLKIN input to the 10 MHz reference clock or to multiple PXI_STAR lines, while also allowing for the locking of the OCXO timebase to an external reference clock. It operates with the NI-Sync driver software, ensuring seamless integration with other National Instruments hardware. The module has been designated as obsolete, yet it remains available for purchase and repair through Apex Waves, and includes comprehensive user and maintenance manuals for assistance. For pricing information, please consult a sales representative.