OS-2000 series Frequently Asked Questions

You can use 'ExpressionItem' from basic frequency analysis to compute and output the difference and sum of power spectra.

1. Set the two data items "before measures" and "after measures" on the basic frequency analysis screen for calculation.
2. Double-click on 'ExpressionItem' to display the 'inter-item operations' screen and enter the expression.

   

3. You can input the expression by double-clicking on the list of "items" and "operators".
   Input the expression as SQRT([1]*[1]-[2]*[2]) and click the OK button.

   

4. 4. After execution, the difference values between the pre-measurement data and post-measurement data will be displayed with a brown line.
   Line .. pre-measurement data, red line .. post-measurement data