SAT amplifier for 4, 8 or 16 polarities, for installations in cascade. For 16 polarities, two stacked amplifiers of 8 polarities are installed. Equipped with gain control and independent equaliser for each polarity. Requires the FU-513 power supply unit, from the NET power supply connector, to feed the amplifier and intermediate active multiswitches. To power the LNB, the FU-612 power supply unit is used. Return path included from 5 to 65MHz. Shielded zamak chassis with plastic supports. F-type connectors. Two power supply jacks, 9.5mm x 2.1mm for the NET cascade and for the LNB.