User's Manual

Screen Service SDT 200UB - 500UB ARK 1 Purpose and planning
July, 2009 v 1.0 Page 2 - 9
2.6.7 RF AMPLIFICATION
The signal coming from the agile up converter goes to the RF amplifier section. The RF amplification is done
by class A stages (ARK_1 200 U) and by class AB (ARK_1 201).
They are made by PALLET and, as reported in FIGG.2-3 and 2.4, there are NO SINGLE POINT FAILURE
Out of the final stage, the RF signal passes through a directional coupler. The directional coupler detects
samples of direct and reflected power and passes this information to the check function