Frequency response vi and writing to lvm files

[An Engineering Student]

I'm having trouble writing the magnitude y/x of the frequency response vi to an .lvm file.

I don't get any samples in my file when I run the program.

Any idea what I'm doing wrong here?

[An Engineering Student]

OK I changed it so that it's input into an array, and changed the sample frequency of the read waveform and now I'm getting a set of points.

However, now they're all equal to 0.000 .... my gain in my circuit is 1 (0dB), but even when I set the output of the frequency response VI to linear I still get 0.

Anyone know why?

[LaurenLL]

Hi,

If you place indicators immediately before and after the frequency response express VI, what do they show?  Are there any differences between the input data before and after the conversions are applied?  I tried putting together a simple VI that takes two simulated signals, inputs them into the frequency response graph, and then outputs it to a file.  It appears to work fine, as long as the two inputs are at a different frequency.

What version of LabVIEW are you using?  Where specifically are you reading the 0 values?

Regards,

Lauren