User's Manual

ROCKWELL COLLINS
COMPONENT MAINTENANCE MA NUAL with IPL
TDR-94, PART NO 622-9352
STEP PROCEDURE DESIRED RESULTS
12.1 Bad MO DE-S Discrete Address Input
Remove power from the UUT and ground all MODE-S Discrete
Address inputs. Restore power to the UUT. After initialization
has been completed, ensure that Fail-Warning output, P1-31, is
active low (less than 1.5 V dc).
12.2 Restored MODE-S Discrete Address Input
Remove power from the UUT and set MODE-S Discrete
Address Inputs for a valid address, i.e. one where all such
inputs are not the same (ground or open). Restore power to the
UUT and after initialization has been completed, ensure that
Fail-Warning output, P1-31, is set high (greater than 23 V dc
when loaded with 140 ohms).
Method: Interrogate the unit with MODE-S interrogations set for
address 52525252. Set the computer strapping for a MODE-S
UUT address of 52525252. Cycle the power and verify that
the fail-warn light comes on. Set the computer strapping for
a MODE-S UUT address of 00000000. Cycle the power and
verify that the Fail warning light goes out. Reset the computer
strapping for a MODE-S UUT address of 52525252 and cycle
the power.
Fail warning lamp on
Switches off with a bad address
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Final Performance (Customer Acceptance) Test. Cont.
Table 1001/Table 34-50-96-99A-009-A01
34-50-96
Page 1038.1/1038.2
May 07/07