Patent ID: 6728650
Filing Date: 2004-04-27
Classification: H03F

Abstract:
An apparatus for determining an operating point of a high power amplifier for satellite communications, comprising:direct current (DC) voltage converting means for coupling an output power of a channel amplifier and converting the coupled output power to a DC voltage; storing means in a ground monitoring center for, before satellite launching, for whole channels of a satellite transponder, mapping the output power value of the high power amplifier and the DC voltage level of the channel amplifier per each command step assigned to either a fixed gain mode (FGM) or an automatic level control (ALC) mode and storing mapped results; and operating point detecting means in the ground monitoring center for, after the satellite launching, detecting the operating point and the output power level of the high power amplifier of a corresponding channel based on the mapped results stored in the storing means by using the DC voltage level measured at the DC voltage converting means as telemetry information.