AIR Satellite digital and TV AM demodulator (receiver)
Source of TV and RA programs in the AIR system are digital and/or analog satellite/terrestrial/cable TV and RA programs, received through satellite and terrestrial antennas or through cable. The satellite demodulator converts the received signal on the 1. Interfrequency to ASI output (in the case of digital receiver) or to analog signal (audio and video) in the case of analog receiver. In the case of an analog receiver, video and audio are then digitalized through MPEG2 encoders (ASI output provides the MPEG2 format directly). The MPEG 2 encoder can define a higher compression rate if needed. Signals received in digital format can not be additionally compressed.