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SSR system problems: Interferences

Since the receiver doesn't have so sensitive to be as when a primary radar unit at a secondary radar unit, the main emphases of the disturbances lie with the impulse jamming. A technician would divide up the disturbances into synchronous and not synchronous interferences. But the following marks are commonly used.

Figure 1: the helical blibs look like a cut-away view of an orange.

Figure 1: the helical blibs look like a cut-away view of an orange.

There in addition also are interference signals (synchronous and non-synchronous) which aren't similar to transponder reply impulses of course. However, these are usually “fought” only by reducing the receiver sensitiveness automatically and by an indication with a blinking signalling lamp (“Jamming”).