Trigger PXI 5122 digitizer

[Azazel]

Hello all,

I am using XP, LV 8.2.1, PXI-5122. 

Here is my test situation. I would like to coninuously trigger my PXI-5122 with an external signal.  I don' t know if continuous  is the right word but I need the PXI card to take 1024 pts at 100MS/s once it has received the trigger signal, then wait for the next trigger edge and then repeat the same data acquisition.  Is this possible?  I have been playing with some of the built in examples but have been unable to accomplish this as of yet.  Any help would be greatly appreciated and thanks in advance.

Azazel

[Azazel]

I just read that the PXI-5122 has a trigger re-arm of 100us, but with my settings it needs to be re-armed every ~ 23us.  Is there a way to get around this?

Azazel

[Raajit_Lall]

Hello Azazel,

With regards to your first post,  I don't know if you have taken a look at the niScope EX Multi Record.vi and the Fetch In Chunks.vi.  Also, on the PXI-5122, the rearm time is dependant on whether you have the TDC (Time to Digital Conversion circuit) turned off or not.  If it is off, you have a rearm time of 2us and if it is on you have a rearm time of 10us.  More information can be found in the detailed specifications of the 5122, which can be accessed by clicking here.  If you do need to extend the trigger time to 23us you can use the trigger holdoff functionality.

Regards