Single Item Test   In the FFT Graph, (top left of DEPA V9 screen) click on the Red Cursor (the red dashed line) and with the left mouse button pressed drag and place the red cursor on the Main Frequency (F). Important!   Upon red cursor move observe the Peak Freq and YM readings   As you drag the Red Cursor and place it on the Main frequency (F) you should see the Peak Freq and YM readings changing (in the top right window). Important! These are the readings corresponding to the current position of the Red Cursor. Important! When you place the Red Cursor on (F) compare the YM reading to see if it falls under the expected range for the type of material that you are testing. Important!           NOTE: YM ranges of Common Materials (Click on Link)