  We report on the quantitative experimental illustration of elementary
optomechanics within the classical regime. All measurements are performed in a
commercial dilution refrigerator on a mesoscopic drumhead aluminium resonator
strongly coupled to a microwave cavity, using only strict single-tone schemes.
Sideband asymmetry is reported using in-cavity microwave pumping, along with
noise squashing and back-action effects. Results presented in this paper are
analysed within the simple classical electric circuit theory, emphasizing the
analogous nature of classical features with respect to their usual quantum
description. The agreement with theory is obtained with no fitting parameters.
Besides, based on those results a simple method is proposed for the accurate
measurement of the ratio between microwave internal losses and external
coupling.
