TPutzien

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Everything posted by TPutzien

  1. TPutzien

    Oscilloscope Like Trigger Function On Graph

    Thank you very much! This works really well.
  2. Hi there, I'm new to DaqFactory and hope this is a fairly straight foward question. I'm sure there must be a way to get a graph in DaqFactory to work like an Oscilliscope and trigger a freeze (or similar on the left hand side of the graph) based on a specified value everytime the leading edge of a reaping signal comes around? I had a look around the forum but couldn't find an example of a code snippet that would help me out. Thanks in advance! Tim
  3. TPutzien

    Oscilloscope Like Trigger Function On Graph

    Thank you very much. I got there in the end. Using the method you used. Apologies, I didn't send through all the information last time. I think there might be a problem with running the Labjack in stream mode using the StartStream sequence I had defined (section 9 of the manual) and trying to actuate the trigger. I have attached 2 files below. One with and one without the stream function. I am using a 5V 10Hz saw tooth profile from a signal generator to test the trigger function. In "normal mode" the trigger function works fine. Using the "stream mode", as defined in the function, I run into the consistency problems I tried to show earlier. I also tried running only the pressure signal in "stream mode" and the trigger signal in "normal mode" but that also runs inconsistently. While I can type in a timing value of say 0.001s into the channel input, the frequency doesn't go above 250Hz looking at the data values coming in on the table tab. For my test setup I am expecting to see oscillations at hundreds Hz and above which I will need to fully capture and would like to display using the graph trigger function, so I will need the scan rate to be sufficiently high. Is there another way to get the data from the Labjack into Daqfactory using stream mode? Thanks, -Tim Test_2_normalmode.ctl Test_2_streammode.ctl
  4. TPutzien

    Oscilloscope Like Trigger Function On Graph

    Thank you very much for the reply. I was able to implement this function and it works. Sort of. Unfortunately it is a bit unstable (there are periods of up to 10s when nothing is displayed in the graph) and sometimes the full image isn't propagated. To work out the kinks I have a simple one sensor setup and am triggering off a saw tooth signal at 10Hz between 0-5V. I have had to setup the thresholds for myChannel[0] and myChannel[1] far apart to get it to work about (about 0.5V). I was wondering if this might be the cause of the instability? I can get it running slightly more consistantly if I up the scanrate and then the history. However then the screen draw time can get very high (several seconds) if I do this. It also only seems to work if I set the time (x) axis to linear. Any further tips? Maybe theres a better way to do this?
  5. TPutzien

    Oscilloscope Like Trigger Function On Graph

    Thanks for the reply. I suppose that's what I would like to do. But maybe there's a better way? I have a Labjack U6 and I followed the manual in section 9 to get the channels onto the graph in stream mode. The code in the manual maps a sequence to button to activate the streaming. I was wondering if something similar can can maybe be used as a automated trigger? I will have a series of repeating signals at about 20Hz that I'd like to analyze live and in quite a bit of detail so will need sample rates much higher than that. I am basically looking for an oscilloscope type display but on the computer with the capability to add multiple signals onto a single graph. Thanks again! -Tim