Tvheadend

This should be solved on the input side. I changed the signal value from 10 to 120 (240 range) in v4.3-247-g6302409 when it's unknown. Let me know, if this helps.

This should definitely not be solved on the input side. If my SAT IP Server sends max 100 and Tvheadend is set to max 240 as my clients expect max 240 from the Tvheadend server, we are causing issues in other parts of Tvheadend. We should not fix errors on the output side by settting the input to wrong values. Thats a rather hacky solution. If we could force the server to send a constant signal strength that would help.

Sorry, but I don't understand your issue now. The standard range is 0-240 (see SAT>IP spec), so TVH should correctly report values 0-240 and every source should be converted to this range.

Perhaps, you're asking to use scale only 0-100 for some broken clients which does not conform to the SAT>IP spec?

Yes, I think I have a client that violates the specs. That's why I want an Option to make TVHeadend compatible to that client. Some Servers don't report a signal strength at all (they just send 0), for that I would like to be able to overide the received signal strength to make every client think we have good signal. Maybe I should have splitted this into 2 feature requests.

I implemented only 'force level'. The broken clients may be handled using this config until they're fixed. I know that some 'hardware' SAT>IP servers uses full range as in spec, so these clients will have trouble with them, too.