Always make sure to confirm the changes made to the channel list.
An error was made in the channel list ordering procedure of the receivers in the TELE System family, i.e. TS7.3DT, TS7.2DT, TS7.4DT, an etc. at paragraph 2.2.3 of the instruction manual (there is an errata corrige in the "download/Manuals" section of our homepage). In fact after making any changes to the list, do not quit the menu by pressing EXIT, but press BACK instead.