Dynamical power spectra of the simulated solution, obtained with m₁sin I = 2.0 M_J and m₂sin I = 0.9 M_J (I is the inclination of the planetary orbits to the sky plane), showing the proper frequencies of the system as functions of the mass of the central star. Top: spectrum obtained for sin I = 90°. Bottom: spectrum obtained for sin I = 60°. The smooth evolution of the proper frequencies is characteristic of the regular motion, while the erratic scattering of the points is characteristic of the chaotic motion.