Converting a *.cnf file to a text file Convert a Canberra 8000 channel file (*.cnf) to a text file as follows: First click on the "browse" button to select the *.cnf file from your computer. Next, click on the "Upload *.cnf File" button to upload the file to memory. Then, click on the "Write Data to text window" button to produce a text file of the data. Finally, copy and paste the data in the text window to a text file on your computer.