Power spectral density (PSD) diagrams showing granulation and pulsation signals caused by large convective envelopes in low-mass dwarfs. The PSD was computed for a 2-yr noise-less light curve. The bottom panel is a zoom-in on the combined model illustrating the standard envelope of excited modes (used to estimate the frequency of maximum power, ν_max) and the small (δv) and large (Δv) frequency separations.