The paper presents experimental validations of noise power in system under hardware constraints. A system performance is limited by the noises penetrates into the system and the noises power highly depends on hardware configuration. Therefore, appropriate hardware configuration is important to realizes a required specification with minimizing hardware resources. Then, to validate the noise power in the existing hardware setup is significant for the control design. In the control system, a noise power density has relation to an expression of power of numbers and the sampling time of the controller, namely a spatiotemporal resolution. The paper firstly derives a theoretical relation between the noise power and the spatiotemporal resolution and then validates the theory by experiments. The experimental validations show the practical perspective for the controller design and indicates a design guideline of the hardware configuration.