Capture of 4 analog chanels, using one of them as a trigger

[MikN]

Hello there,

I posted a message a week or so ago about some issues I was having, and I seem to have sorted them out (which is great!). Thanks for the pointers.
So, I have one more quiery, and hopefully the last for a while. I've attatched a copy of part of the VI I'm working with. All it does is capture a user-specifiable number of analog input channels and write them to a data file. It does so quite nicely, and with no problems. So..
My requirement is that the actual capture of the input channels must occur only when a certain triggering voltage is met. This trigger will come from a Berkley Nucleonics 500A pulse generator box. The precise nature of how it might work I am not sure about because I'm a little unsure about what my equipment can do. I was thinking the trigger could be one of the input channels.. that would be great. My interface is an SCB-68 board. It is currently set up for 4 analog input channels (and 2 output channels), using BNC connectors.

I've been doing some digging to try to avoid spamming a new message, but haven't really got anywhere.. I'm a little concerned about whether my system will even allow something like this. Will I have to wire in (physically) some new channels into the SCB board? I read something about only digital edge triggering being possible. If I have to use a digital trigger, is there any way to use the current pulse generator..?

Again, any pointers are greatly appreciated. Regards,
mike

[LV_Pro]

Hi,
    This forum (Breakpoint) is more a social one than a technical one. There are forums on this site devoted to the DAQ questions, LabVIEW, whatever, where you will probably get a much quicker answer to your questions. As this is a social one it isn't visited as often by as many people as the other ones.

Thanks,

P.M.

[MikN]

Hi there,

sorry about that... total mistake - i meant to post in the labview forum..!