Tone measurements Express VI

[Lennard.C]

Hi,

From what I can see from your code and your screenshot, I believe you need to do some settings at the Harmonic Distortion Analyzer. Let's start with the Harmonic Distortion Analyzer vi. There's an input for highest harmonic (refer to help or http://zone.ni.com/reference/en-XX/help/371361G-01/lvwave/harmonic_distort_analyzer/). Create a constant and give a value of -1 (value which you have set in your Tone Measurement Express VI) and give it a shot. 

Else you'll need to play around with the values for the "export mode" input terminal of the Harmonic Distortion Analyzer.vi

Thanks 

Warmest regards,

Lennard.C

[Wael82]

Hey Guys!

I have a similar problem in this topic. I have reconfigured the audio analyzer VI template, available in 2013 version, to acquire 4 channels from microphones, and I added a sound generation function to generate sound going to a speaker attached to one end of a sound tube from which the sound is being measured by the microphones placed at different points on the tube.

The main VI, Audio Analyzer, has 3 different modes for data to be acquired: noise and broadband, single tone, and multi-tone measurement. The noise and broadband works well, but the other 2 don't.

The problem is when I run this tone mode, which uses the tone measurement VI, in this already built example, a message pops up saying that the amplitude of the fundamental tone is too low to perform accurate measurement. It also asks to change the sampling frequency and frequency resolution! I tried to play with amplitude, frequency and sampling rates in my sound generation sub VI, but I still get the same response! Could you please help?

Is there something messing or I could not understand regarding the sampling?