Rev E TR-220 90 008 088-1
2-28
2.14 Testing a Transponders “IDENT” Function
NOTE
1. To test the “IDENT” feature of a transponder the operator may select the Mode A or
the M C Test for the appropriate transponder (Mode A/C or Mode S).
2. Allow the Test Set to complete the test.
3. Press the IDENT button or switch located on the transponder control panel or cockpit
interface.
4. IDENT will be displayed for approximately 20 seconds to verify the receipt of the SPI
pulse from the transponder.
5. The operator may now continue testing the transponder through the remainder of the
tests.
END OF TRANSPONDER TESTS
The “IDENT” function can only be tested in the Manual mode of Tests in
both Mode
C and Mode S.
M A /
Testing . . .
M A 1234 100%
0.45–20.35– 0.45 PASS
M A 1234 IDENT 100%
0.45 ─ 20.35 ─ 0.45
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