Análisis de un canal de transmisión central de las bandas GSM-850 y GSM-1900 en el interior de la ESPOCH utilizando el Narda SRM-3000, para determinar el comportamiento de la intensidad de campo eléctrico.

Abstract

It was carried out the analysis of a Central transmission cannel of the Global System for Mobile communications (GSM), in the bands 850 and 1900 Mhz, in the Escuela Superior Politécnica of Chimborazo (ESPOCH). The measurement equipment Narda SRM-3000 was used to determine the behavior of the electronic field strength, for which 1675 measurements were collected at a fixed location, at a distance of 370 meters from the base of the monopole tower to the measuring equipment. The data obtained allowed to verify the behavior of the electronic field strength during different times of the day, including high traffic hours, rush hour, where the measurements reached maximum values. In addition, periods of time where the data indicate minimum values were analyzed, such is the case of the first hours of the day. Later the data is compared with those recommend by competent agencies such as the International Commission on Non-Ionizing Radiation Protection (ICNIRP), and the current regulations in our country regulated by the Telecommunications Regulatory and Control Agency (ARCOTEL), which are based on the recommendations of the International Telecommunication Union (ITU), specifically the recommendations K.52 and K.61. After collecting and analyzing data during seven consecutive day, an application was developed by using Microsoft Visual Basic 2014 to graphically demonstrate the behavior of the electric field strength produced by the central downlink channels of the GSM - 850 and GSM - 1900 bands. The application was used as a tool for comparison with the current recommendations in the country and to identify the time spans when the central channels of the GSM bands show considerable variations. If was determined that all monitored values are bellow the limits permitted by therecommendations mentioned before. Further study is recommended in another area of the campus.