Signal Routing for PXI Devices
You can use the PXI trigger bus to send and receive events, triggers, and Sample and Reference clocks. For more information about triggers, events, and clocks, refer to Dynamic Generation Triggers and Events, Dynamic Acquisition Triggers and Events, and Clocking.
All signal routing operations can be characterized by a source and a destination. The following table summarizes the possible sources and destinations for NI 654x/655x/656x signals. Sources are listed in the far left column, and the possible destinations span the top of the table. Some of the internal signals are broken into separate columns for generation (Gen) and acquisition (Acq).
| Destinations → | Front Panel | Backplane | Internal | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sources ↓ |
CLK OUT |
PFI 0 | PFI <1..3> |
DDC CLK OUT | PXI_TRIG <0..6> |
PXI_TRIG7 | PXI_STAR | Start Trigger (Gen) |
Pause Trigger (Gen) |
Script Trigger |
Start Trigger (Acq) |
Advance Trigger |
Ref Trigger |
Pause Trigger (Acq) |
| Front Panel | ||||||||||||||
| CLK IN | √ | — | — | √ | — | — | √ | — | — | — | — | — | — | — |
| PFI 0 | — | — | √ | — | √ | — | √ | √ | √ | √ | √ | √ | √ | √ |
| PFI <1..3> | — | √ | √ | — | √ | — | √ | √ | √ | √ | √ | √ | √ | √ |
| Backplane | ||||||||||||||
| PXI_TRIG<0..7> | — | √ | √ | — | √ | — | √ | √ | √ | √ | √ | √ | √ | √ |
| PXI_STAR | √ | — | — | √ | — | — | — | — | — | — | — | — | — | — |
| Internal | ||||||||||||||
| Sample Clock |
√ | — | — | √ | — | — | √ | — | — | — | — | — | — | — |
| Reference Clock |
√ | — | — | — | — | — | √ | — | — | — | — | — | — | — |
| Start Trigger (Gen) |
— | √ | √ | — | √ | — | √ | — | √ | √ | — | — | — | — |
| Pause Trigger (Gen) |
— | √ | √ | — | √ | — | √ | √ | — | √ | — | — | — | — |
| ScriptTrigger<0..3> | — | √ | √ | — | √ | — | √ | √ | √ | — | — | — | — | — |
| Start Trigger (Acq) |
— | √ | √ | — | √ | — | √ | — | — | — | — | — | — | — |
| Advance Trigger (Acq) |
— | √ | √ | — | √ | — | √ | — | — | — | — | — | — | — |
| Ready for Start Event (Gen) | — | √ | √ | — | √ | — | √ | √ | √ | √ | — | — | — | — |
| Marker<0..3> Event | — | √ | √ | — | √ | — | √ | √ | √ | √ | — | — | — | — |
| Data Active Event | — | √ | √ | — | — | — | — | — | — | — | — | — | — | — |
| Reference Trigger (Acq) | — | √ | √ | — | √ | — | √ | — | — | — | — | — | — | — |
| Ready for Start Event (Acq) | — | √ | √ | — | √ | — | √ | — | — | — | √ | √ | √ | — |
| Ready for Advance Event (Acq) | — | √ | √ | — | √ | — | √ | — | — | — | √ | √ | √ | — |
| End of Record Event (Acq) | — | √ | √ | — | √ | — | √ | — | — | — | √ | √ | √ | — |