that's all it is. check this out:
Surge Guard RV Voltage Regulators - Product - Camping World
this or something like it will help out. notice the cost.
If you have a 12v
powered television (TV on this forum usually means tow vehicle) the power is filtered over the coach batteries and that will keep the voltage constant. or, you can use an adequately sized inverter generator that provides ripple/surege/sag free AC.
$ will solve any problem.