The information storage techniques of some old radar warning equipments are out of date,and can\'t satisfy the operation requirement in modern complicated electromagnetic environment at a certain extent.

To overcome the deficiency of traditional frequency meter,a convenient way is found for measuring carrier frequency of radar by use of acousto-optic deflection effect,and therefore to realize radar warning.

This paper intends to present the theory of passive signal location using radar warning receiver or antiradiation missile at fighter planes.

In this paper, the radar equipment fault diagnosis based on artificial intelligence are primarily discussed, It also chiefly introduces the overall frame and the function, on the other hand, the key technique of this system is analyzed mostly.

Results obtained for the application of a certain vessel radar equipment integrated diagnostics validate the utility of this approach.