1893 - Normal Spectrum? Normal Spectrum? Yes Go to 1915 - 1895 - Perform Calibration - Formal Procedure, Notes: 1777 No Go to 1917 - 1894 - Move Backpack away from Sources - Process, Notes: 1916 Step Reference Number 5.7 Note 1918 - A normal spectrum should only have a K-40 peak from the Atomtex Check Sample ... 1919 - This is an example of a normal spectrum. 1920 - This is an example of a spectrum with additional sources of radiation present...