We recommend using Exfo FastReporter for viewing full details of OTDR results (although many other .sor file viewers are available). Whilst test results can be exported to .pdf this shows a “zoomed out” graph view and the detail is often too small to see. Our preference is to always supply results in .sor file format. The free version of Exfo FastReporter includes all the functionality to view .sor and .trc result files. To download version 2.21 click here To download version 3.14 click here Although version 2.21 is older it does not display a nag screen at start-up. If you require further assistance please contact viewer@optalay.com.