Analysis and Solution of Aging Fault on MSP-L of THALES LOC411 Localizer
It has been nearly 30 years since THALES LOC411 localizer was introduced to China in the late 1990s,and most of the equipment has entered the aging period.This paper analyzes the working principle of MSP-L board of THALES LOC411 localizer,the monitoring signal processing flow and the equipment parameter configuration,finds out the reason why the AGC gain parameter of near-field monitoring channel becomes higher after the MSP-L board is aged,and puts forward a method to restore the AGC gain parameter of near-field monitoring channel to normal by optimizing and adjusting the equipment configuration parameters without replacing and maintaining the MSP-L board.
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