Triggering on frequency entering and leaving window SignalExpress Bug
In the recording options of SignalExpress, when one sets up a trigger to trigger entering or leaving a window of frequencies, This does not work properly.
I was using a Signal Acquire Voltage step, then doing Tone extraction on the Voltage channel. I hooked up a frequency generator to the voltage in. As I ramped the frequency of the generator up and down expecting the trigger to start logging to disk, I was sadly dissapointed to not see this work properly.
As a side note, I also had a voltage threshold trigger set also, now that I think about it and the Trigger Logic was set to OR, but this shouldn't have anything to do with the problem
Can anyone Confirm?
Ben Yeske
The hardware involved was a USB-Compact Daq Chassis. I was using the NI-9233. The Recording log was set to trigger on leaving a window of frequencies. The frequency parameter was acquired from the tone extraction step on an analog voltage channel.
Seems pretty straightforward to me, and one should be able to reproduce the inconsistent entering window/leaving window triggering behavior with a wide variety of hardware.
Ben Yeske
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Attachments:
event bug1.vi 26 KBI put together a quick test, but I'm not sure what the results mean.
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Message Edited by tst on 07-12-2005 08:38 PM
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