  We study the quantum fluctuations of the two quadratures of the emitted
electromagnetic radiation generated by a quantum Hall device in a quantum point
contact geometry. In particular, we focus our attention on the role played by
the unavoidable electron-electron interactions between the two edge channels at
filling factor two. We investigate quantum features of the emitted microwave
radiation, such as squeezing, by studying the current fluctuations at finite
frequency, accessible through a two-filters set-up placed just after the
quantum point contact. We compare two different drives, respectively a cosine
and a train of Lorentzian pulses, used for the injection of the excitations
into the system. In both cases quantum features are reduced due to the
interactions, however the Lorentzian drive is still characterized by a robust
squeezing effect which can have important application on quantum information.
