Triggering 2 devices from a current limited output

[jimmyinCT]

I have a analog output which is current limited around 10mA.  I need to trigger two different devices from this output. The trigger will work on each devcies independenly but fails when it has to trigger both at teh same time, thus demonstating it is workign correctly but just current limited.

Both devcies need to be triggered at teh exact same time (to the ns).   I can use another output pin to trigger the devices independetly but when I do so, Im seeing almost 1us difference on the triggers on the oscilloscope. Its just way to much.

Has anyone had a problem like this before and how was it solved?  There has got to be a NI produt for this,right?   Im not against building a BJT amplifer but dont want to blow the input ports if i go over the current limit which is typically 10mA ish. 

thanks

[pflores]

Hello Jimmy,

What device are you currently using? You can achieve your desired behavior with a couple options:

- S-Series DAQ - Simultaneous sampling outputs will give you precise control of multiple channels. Your device is most likely multiplexed which would explain this small delay between channels.

- Industrial Multifunction DAQ - These cards are rated for higher current and may be able to drive your devices off of one channel.

 Regards,

[jimmyinCT]

we found the problem to be that the device doing the triggering is not working properly.

we had an indentical device able to perform the same triggering operation

 all set, thanks.