RF loads, or dummy loads, simulate a device that will receive an RF signal for radio testing purposes. Engineers connect signal-generating devices, such as an RF amplifier, with RF loads to assess the operation of devices like power meters and sensors, and in general situations in which one wishes to test an RF signal before the device goes operational. Dummy loads work with the same principles an electrical load would—the load is 100% resistive to the signal being transmitted into it, dissipating the energy as heat and allowing the signal-generating device to be tested with relatively few variables.