Vector reference curve

In the vector reference curve, we define the reference curves for the input channel, which is usually an array (FFT data, …).

When you press the Setup button on newly activated Vector reference curve line, the following setup screen window will open:

Vector reference_Setup


Reference type

Vector reference_Setup_Reference type

The reference curve type can be selected from:

  • lower (define the lower limit)
  • upper (define the upper limit)
  • lower & upper (define the lower and upper limit)

Linear interpolation

Vector reference_Setup_Linear interpolation

With linear interpolation, the program will draw a direct line between the two neighborhood points. It will give a smoother transition between the points on the curve.

Check signal bounds

Vector reference_Setup_Check signal bounds

This will create an additional output channel which will output 1 when the input is higher than the reference curve and will output 0 when the input is below the reference curve

Axes settings 

Axes settings can be selected from:

  • linear
  • logarithmic
  • 0 dB (dB reference will be set from the range of the first channel)
  • Noise dB (the reference value is 20 uPa)
  • ref. dB (user enters the reference value)

Limit table

Limit table points can be manually defined or by copy/paste from an external program.

Vector reference_Setup_Limit table and Data


Rename the channels with the click on the icon in the top right corner and selecting the Change axis name/unit option.

Vector reference_Setup_Change axis name