Screen Service MMDS Transmitters

The MMDS systems in this series have been designed for the transmission of amplitude-modulated analogue television signals, with combined audio/visual amplification, or digital signals according to DVB-T, DVB-S and DVB-C standards.They are available both in separate amplification versions for each individual channel and in common amplification versions for combined groups of channels and in all frequency bands comprising of 1.5 to 24 GHz.The separate amplification systems consist of a transmitter and where necessary, of an RF amplifier which directly powers a radiant antenna or a power combiner in the case of multichannel transmission.The common amplification systems consist of an agile frequency modulator, a low-level combiner and a broad-band amplifier (up to 400 MHz) that powers the transmission antenna. The agile modulators enable the transmission channel to be changed directly from the front panel without any need for calibration operations.The high degree of linearity of the final stages and the optimization of the RF circuits guarantees low levels of intermodulation, thus permitting the use of adjacent-channel systems.