User Manual

maintenance 523-0809018
a. Simulate a 2000 ft pressure altitude (uncorrected). Set t he squawk code to 1234. Set the Flight ID to TEST1234. Set the
selected altitude to 16000 ft.
NOTE
Other altitude values can be used to run this test.
b. Run a Mode A/C decode and Side Lobe Suppression (SLS) test. Make sure they pass. Make sure that the proper altitude (2000
ft) and squawk code (1234) are reported.
c. Run an XPDR A/C Spacing Width Test, which also tests the ATCRBS all-call functionality. Make sure it passes.
d. Run the power and frequency tests. This also tests receiver sensitivity. Make sure they pass.
e. R u n a Mode S All Call test. Make sure it passes. Make s ure the Mode S address is correct.
f. Run a Mode S Reply test that includes a test o f diversity. Make sure it passes.
g. R u n a Mode S UF0 test. Make sure it passes. Make sure that the maximum airspeed range is what should be programmed for
that aircraft.
NOTE
The maximum airspeed range is programmed in the ECU as part of the ai rcraft configuration. If necessary, read
the documentation that co mes with the aircraft configuration media set to see what this value should be.
h. Run a Mo de S UF4 tes t. Make sure it passes. Make sure that the reported altitude is 2000 ft.
i. Run a Mode S UF5 test. Make sure it passes. Make sure that the reported squawk code is 1234.
j. Run a Mode S UF11 test. Make sure it passes.
k. Run Elementary Surveillance tests. Retrieve, at a minimum, registers 1,0, 1,7 and 2,0. Make sure that the tests pass and that
the retrieved value of register 2,0 is TEST1234.
l. Run Enhanced Surveillance tests. Retrieve, at a minimum, reg isters 4,0, 5,0, an d 6,0. Make sure that the tests pass and that the
selected altitude repo rt e d in Regis ter 4,0 is 16000 ft.
4.8.9. A
DS-B Transmit Ground Test.
Run this test only if the ADS-B Out option is available. Perform th is test when th ere is pilot complaint that there is an issue with the
ADS-B position transmissions from the aircraft.
NOTE
Flight testing, or GPS simulation o f a flying aircraft, is required to do more testing than specified here.
a. Set the TSS-4100 as the selected t ransponder, and have it set t o reporting al titude. Turn o n the primary GPS and turn o ff any
secondary GPS. Allow the GPS to obtain a good position fix.
b. Use the IFR -6000, or any other ADS-B capable test set. Use it to monitor for Register 0.6, the surface position squitter. Make
sure that the decoded position is correct. Make sure that the position is synced to the time mark. On the IFR-6000, this is
indicated by the annunciation UTC. The indication that the position is not synced to the time mark is N/UTC.
c. If there is a secondary GPS, then turn off the primary GPS and turn on the secondary GPS. Let the secondary GPS to obtain a
good position fix.
d. Use the IFR-6000, or any other ADS-B capable test set, and use it to monitor for Register 0.6, the surface position squitter.
Make sure that the decoded position is correct. Make sure that the position is synced to the time mark.
4.8.10. T
ransponder/TCAS Suppression Bus Issues.
If the pilot report describes a Tracking Own Aircraft TCAS error when the non-TSS transponder is selected, then the transponder
suppression interface should be examined for open/short circuits. The su ppression interface connects each TDR-94D connector,
TSS-4100 connector, and D ME radio. When there is a s uppression interface problem, the traffic display shows an intruder aircraft
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