Total maps predicted at the four frequency bands of OLIMPO: these are the sum of the CMB anisotropies, SZ effect, dust, and FIRB components plus the radio and infrared sources and the expected noise in the four bands. Signals are expressed in μK. We note that the CMB anisotropy component dominates the 143 and 217 GHz channels, while the 353 and 450 GHz channels are dominated by Galactic dust. The far infrared background contribution is comparable to the Galactic dust one, but seeing it is more difficult since it lacks of structures at scales larger than beam size. However, when adding the point sources, these loom over the other components, particularly at 450 GHz.