RTSI

The Real-Time System Integration Bus (RTSI) is a timing bus developed by National Instruments. PCI devices can use the RTSI bus to share and exchange timing and control signals between multiple devices. The RTSI bus consists of the RTSI bus interface connector (located at the back of the device) and a RTSI ribbon cable.

When there are multiple SMC-based products in the PCI computer that need to be phase-locked to a common 10 MHz Reference clock, they can be connected with a RTSI cable. One of these connected devices should drive its Onboard Reference Clock to RTSI 7. All of the devices should receive their Reference clock from RTSI 7.

Tip  The device on the end of the RTSI cable should drive the Onboard Reference clock, instead of a device located at the center of the cable. This configuration results in optimal signal integrity for the Reference clock.