Hi Jasonvp,

again thanks a lot for your help: B + F are working as expected.

So now almost everything is working fine. Only two minor issues are left:

I wasn't able to find a hex code for the button 'Exit'. I tried all the ones from the link '[Link: remotecentral.com] but for all of them there's no action at all.

The buttons 'Up' and 'Down' are working correctly by selecting the next or previous channel after implementing your tip to swap the third and fourth word.
But If I use the same buttons within the teletext functionality the problem with the 'double' action is still occuring. So instead of the next page the page after the next page is opened when pushing the 'Up' button. The same is valid for sub pages after pushing the 'Stop' button.

Any tip would be very appreciated. If you don't have any idea thanks again for your execllent and fast help.

Kind regards
Andreas