National Instruments PXI-6683 PXI Synchronization Module

The NI PXI-6683 (Part Numbers: 782109-01 and 782110-01) is a Timing and Synchronization Module that synchronizes PXI and PXI Express frameworks by utilizing GPS, IEEE 1588, and IRIG B to perform synchronous events. The PXI-6683 can create events and time signals at indicated synchronized future circumstances and timestamp input events with the synchronized framework time. The PXI-6683 highlights an onboard available temperature-compensated crystal oscillator (TCXO) that can be disciplined to GPS, IEEE 1588, and IRIG B for long-term stability. The user can also utilize the PXI-6683 module to route clock signals and triggers with low skew inside a PXI chassis or between multiple chassis, providing a strategy to synchronize numerous gadgets in a PXI framework.

The NI PXI-6683 gives one standard RJ-45 association for Ethernet communication. This port auto negotiates to the best possible speed—10 Mbps, 100 Mbps, or 1000 Mbps (auto-negotiation can be disabled by software). The Ethernet port is auto-MDI proficient, which implies crossover cabling is not fundamental while connecting the NI PXI-6683 to another system card. The NI PXI-6683 senses whether a crossed connection is required and performs the activity internally. The Ethernet port additionally considers full duplex activity, so traffic can be sent and received at the same time.

There are up to 13 PXI star triggers for each chassis. Each trigger line is a committed association between the framework timing slot and one other slot. The PXI Specification, Revision 2.1, requires that the propagation delay along each star trigger line be matched to within 1 ns. A typical upper limit for the skew in most NI PXI chassis is 500 ps. The NI PXI-6683 can course low skew triggers to the PXI_Star lines from any PFI line.