compare LVM File

[Mackemann]

Hello,

    we have an acquired a sample waveform saved into a LVM File. We'd like to create upper and lower limits to this special waveform and check if the new ones that we acquire are within the specified limits, because we need to check the form of the waveform. We've found the Limit Testing Measurement.vi in the LV examples but in this example it's been used an square waveform, so it is far away from our limit requirements.

   We've also seen the Mask and Limit Testing Express VI and if you wire the attached waveform (inside the ZIP file) to the input of this express VI it appears the acquire measuerment and we can create manually the "envelope" limits. Nevertheless the LVM Data has 2500 points and the limits created manually have less.

   Do you have some idea how to make this waveform comparison? Do you have some LV 7.1 example?

Thanks in advance,

AOC

[KostasB]

Hi,

a possible implementation is attached, you will be comparing all your points with an upper and lower limit and create the result boolean array.

KostasB

National Instruments Applications Engineering

Message Edited by KostasB on 01-09-2008 04:18 AM

[Mackemann]

Hi Kostas,

     this idea doesn't work because I must change the form of the signal (both amplitud and time).

New ideas?

Thanks