Most countries in South America have adopted ISDB-Tb as a standard for Digital Terrestrial Television broadcasts. In some countries, the deployment is in the early stages. However, the unique conditions of the South American countries have not taken into account the selection of the propagation model used for the unbundling of new DTT networks. Ecuador has adopted the ISDB-Tb for DTT transitions, which optimizes the radio spectrum and implements new audiovisual and interactive services. At present, DTT signals are being tested in the cities of Ambato and Latacunga. For the successful implementation of DTT in the Andinos countries, it is necessary to select the propagation model that best suits the propagation conditions of the region. The present study determines the model of propagation that best adjusts to the conditions of propagation of the cities under study through eld measurements. The selection of cities is relevant in the sense that they have geographic and climatological characteristics similar to those of other cities in the Andean region, so the results can be extrapolated to other cities in the region. The model of propagation that best fits the geographic conditions of the region was model ITU-R 525/526.