Converting two-column (separated by tab character) MS Excel2007 spread sheet document to two-series ASCII file in PRN format

1. In Excel2007, click Save icon, a message appears:
   
2. Click No button:
   
   Choose the file type Text (separator: space); then click Save button.
3. The following message appears:
   
   Click Yes button.
4. Close the window:
   
5. The following message appears:
   
   Click No button.
6. A new file with the same name appears on the Desktop of Windows:
   
   This new file has PRN format.
7. Open with right-hand button the new file for Excel:
   
8. The intensity data appear in a single column: