Hello,
I am generating an output square signal that has high and low levels from a few ms to several seconds ( with one of the two outputs I have on the 6221 card ). This signal is used to heat a system and it works fine. I am also using an HP 34401A to measure a resistance that changes with the temperature.This instrument is set to take measurements every 100ms. My problem is to trigger this instrument : since I don't need to acquire the data all trough the test, I would like to be able to start it, at any time I want, on a rising edge of the heater signal. It doesn't have to be synchronized accuratly with when I want to start the acquisiton but it has to start on a rising edge.
To sum up, I don't know how to "get" the rising edge of the output signal of the heater in order to send a digital or numeric ( 0-5V ) trigger to the HP instrument....
would anybody know how to do this?
I have attached the part of my program that generates the square wave signal for the heater
I am using labv 8.0 and a 6221 E card
Any help would be great,
regards
