I have no experience with Spectrum. Typically, there is a document supplied with a cable box remote that allows customization to the TV's Volume and Power IR codes. There will be a number associated with the brand of TV, some TV's might have multiple numbers and the operator will need to pick through those numbers until the correct number is discovered. There are more brands of TV than manufacturers. It is possible that several brands will use the same chassis and IR codes.
In your situation you will need to keep track of the code number and make sure that each room uses TV's with different code numbers.
As a management scheme, you could label each TV with the IR code set number.
Of course, this becomes more complicated if the resident brings a TV from home.
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Not very common, but some cable boxes support a plug-in IR emitter that will control the attached TV. In this case you would attach the emitter to the TV, then mask that TV in order to prevent any direct IR commands from reaching the TV's IR sensor.
