syncing data acquired between 2 PXI chasis, both had a single PXI-6683H, using a single GPS antenna signal, while taking the data. is this possible?

[Joseph@EM32]

i have a test coming up. i need 2 PXI chasis to collect the data. the customer wants accurate time stamp on all signals. i have 1 GPS antenna. each PXI chasis has a single PXI6683H. according to NI documentation, the PXI-6683H has a clock out. clock In circuitry is not included. is there a way to share the GPS time between to the 2 PXI--6683H cards in each chasis, or what is the best way to do this?

[ZYOng]

What is the distance between two chassis? I assume they both have own PXI controller?

[TylerK]

IEEE-1588 (PTP) is an easy way to share time between PXI-6683s. It is a network-based time synchronization protocol. With 2 PXI-6683s, all you need is a direct Ethernet connection between them (Specialized hardware is needed if connected via a switch).

I would recommend taking a look at the following articles:

• PXI_CLK10 Disciplining With a Time Reference Across Multiple PXI Chassis
• Configuring GPS Synchronization with the NI PXI-668x Timing and Synchronization Module
• Configuring IEEE 1588 Synchronization With the NI PXI-668x Timing and Synchronization Module
• Choosing a PXI Synchronization Technology

Hope this helps,

-Tyler