From A for AGF Videoforschung to Z for zapping, the most important technical terms in video research are explained here.
AGF distinguishes between four different reception levels: IPTV, satellite, cable and terrestrial. A household is assigned to a level hierarchically, meaning that if more than one reception level is present, a household is always assigned to the highest level, IPTV being the highest level, followed by satellite, cable and terrestrial. Therefore, a household that receives programmes via IPTV is always assigned to the IPTV level even if other reception options are available in the household. According to AGF’s definition, the satellite level includes all households that receive via satellite, but not via IPTV. A household is assigned to the cable level if it receives via cable, but not via IPTV or satellite. Thus, the terrestrial level includes all households that only have a DVB-T reception possibility.
Reception levels are taken into consideration for both recruitment and weighting. Regardless of the assignment of a household to a reception level, the other available reception levels in the household are also entered into the AGF system by the technician and form part of the AGF data.