how to synchronize two or three measurements, i mean they run at the same instant?

[pspice]

i'm using labview 5

[Labviewguru]

National Instruments has a number of simultaneous sampling hardware. Unfortunately, this is the ONLY way to get absolutely simultaneous sampling of data. However, having used one of them myself, I am highly impressed with their boards. Very easy to use, of course, but also, very, very clean signals.

I used a four channel model, the NI 6110, about a couple of years ago. I strongly recommend using a BNC 2100 series break-out box with it.

[pspice]

Thanks.
your solution's hardware. I'm looking for a software solution, i mean how to send a request simultanously to two devices so that they start measuring, and later i collect the data? (on Labview5.1)

[Dennis_Knutson]

What are the devices? If they're GPIB and 488.2 compliant, you can use TriggerList or issue a Group Execute Trigger.

[pspice]

my two devices are GPIB and 488.2 compliant: hp34401 multimeter and hp4140B pico-amperemeter. I did try using TriggerList, but i haven't succed. Please would u tell me how to handle it. thanks in advance.