The intracavity quadrature fluctuations and photon statistics for the signal modernproduced by a degenerate parametric oscillator coupled to a squeezed vacuum reservoirrnare calculated employing the Q-function. The Q-function is obtained by solvingrnthe Fokker-Planck equation applying the propagator method developed by Fesseharn[lJ. We also calculate the squeezing spectra of the output quadrature operatorsrnusing the quantum Langevin equations