ai trigger routing in the pxi-1045 and pxi-1044 chassis

[Bairoa]

Over the past couple years, I've never had trouble, at least no error messages, with slave analog input in slots 3 through 17&nbsp; being triggered with the ai/StartTrigger from Slot 2.&nbsp; Yet I've never performed any of the manual (via MAX) or programmatic (via VISA) trigger routing from bus segment to bus segment described in documents such as <a href="http://digital.ni.com/public.nsf/allkb/BD37A128B1DF27F3862570FC0072359D" target="_blank">this</a> or <a href="http://digital.ni.com/public.nsf/websearch/E4D6FF2894D848B886256ACE005D552F?OpenDocument" target="_blank">this</a>.&nbsp; These documents have me concerned now that even though I'm getting data I'm missing something...&nbsp; Can someone please explain how my Slot 2 StartTrigger DigitalEdge signal is getting to the second and third bus segments if I've not explicitly provided for it? Thanks!

[Song_M]

Hey Bairoa! How are you doing?&nbsp; How your Slot 2 Timing card's trigger is getting to following modules is dependent primarily on what triggering bus you are using.&nbsp; Are you using PXI STAR trigger? (equidistance trigger)?&nbsp; PXI Trig lines? or PFI lines?&nbsp; It seems like you are most liekly using PXI Star Trigger, as that is the only trigger that doesn't require manual configuration of the lines"The Star Trigger in a PXI-1045 and PXI-1006 chassis is routed from this
slot to slots 3-15. The last 3 slots of the PXI-1045 and PXI-1006
chassis do not have Star Trigger capabilities because the Star Trigger
Bus is limited to 13 lines by the PXI specification."Please tell me if this helps!&nbsp; Thanks Bairoa!