Calculating FFT in dB

[TamerZero]

Looking to write a script to calculate FFT in dB. I ran across an old help topic that gave a calculator formula to do this:

Ch("[1]/AmplitudeDB") = 20*Lg(Ch("[1]/AmplitudePeak")/.01)

When I run this through the calculator under Analysis everything works as expected. The issue is when I try to run this via a script, I have to Call the Calculate Function, this still works, however it's much, much slower. It takes over a minute vs almost instantly when working from the calculator. The code I'm using:

Call Calculate("Ch(""[1]/AmplitudeDB"") = 20*Lg(Ch(""[1]/AmplitudePeak"")/.01)")

Any ideas on what could be causing the slowdown? Is there a better way to do this?

[Alex-C]

Hi,

Often, these timing issues can be a result of the loading behavior that is chosen in settings. Take a look at the following option in settings:

What is it set to currently? If you change this setting, does the calculation time change?

Alex C.

National Instruments