To which USB-6009 pins do I connect my BNC cable in order to send a TTL pulse to trigger a YAG laser?

[Chuck Dizzle]

Hello,

I'm using a USB-6009 DAQ device with Labview 2009.  I want to send a TTL pulse from the hardware to trigger the laser Q-switch.  My question is which pins should I connect the two wires from my BNC cable to make that happen?  I was assuming one of the DIO lines and ground, but that doesn't seem to be working.  If that was correct, it means my code is wrong.

Chuck

[Kyle_A.]

Hi Chuck,

Whether you are triggering an Analog Input, Analog Output, or DIO task, you will need to use the PFI0 line for the positive signal coming from your BNC.  This is pin 29 on your device.  You can still connect ground on your BNC to GND on the 6009, which is pin 32.  You can find more information in the 6009 User Guide.  Here is a picture from the manual below on the pinout:

[Dennis_Knutson]

PFI 0 would be used to trigger the 6009. The op wants to send a trigger to a different device.

Have you used a scope at the end of the cable to see if you are getting a pulse? Have you used a scope at the 6009 with no cable to see if you are getting a pulse.

[AnalogKid2DigitalMan]

Also, what pulse width and repetition rate do you need to trigger the YAG at? The 6009 only supports software timing which may not suit the YAG.

What is the make/model of the laser?

-AK2DM