Rev E TR-220 90 008 088-1
2-13
2.11 Transponder Test Sequence
The TR-220 T/S is capable of testing ATCRBS Mode A, Mode C and Mode S transponders. The
operator may select between an Automatic series of tests and a Manual series of tests. Figure 2-
8 outlines the sequence, in order, of tests conducted. The Test Set will determine the correct set
of tests, either Mode A/C or Mode S upon receiving the transponder RF signal.
Transponder Sequence
Figure 2-8
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