User's Manual

ROCKWELL COLLINS
COMPONENT MAINTENANCE MANUAL with IPL
TDR-94, PART NO 622-9352
STEP PROCEDURE DESIRED RES ULTS
9.3B GPS Bus/Airborne Position Extended Squitter/Time Tag
Ve rification (-008 status TDR-94/94D only)
a. Ensure that neither Air/Ground Discrete #1 or #2 (P2-53
or P1-27) are connected to ground (i.e., establishes the
airborne state).
b. Ensure that neither Configuration Select discrete 0 or 1
(P1-28 or P1-17) are connected to ground.
c. Ensure that ARINC 429 label 203 is not present on the
selected Altitude Input Bus.
d. Provide the transponder with a GPS Time Tag signal via the
GPS Time Tag input (P2-37 high, P2-38 low). The GPS
Time Tag signal is a differential (0-5 Vdc) 1 ms pulse that
repeats once per second.
e. Via the GPS/GNSS Input Data Bus, provide the transponder
with the appropriate labels and data indicated in F igure
1004/GRAPHIC 34-50-96-99B-022-A01 (for step e of test
9.3A). Each data parameter must be updated at least one
time each second.
f. Interrogate the transponder with the MODE-S interrogations
indicated in Figure 1005/GRAPHIC 34-50-96-99B-023-A01
to request BDS register 0.5.
g. Verify that the transponder responds properly with two DF=20
replies that have the exact structures for the "MB" field
indicated in Figure 1005/GRAPHIC 34-50-96-99B-023-A01.
h. Repeat step f. as necessar y.
i. Ver ify that the t ransponder responds properly with two DF=20
replies that have the exact structures for the "MB" field
indicated in Figure 1005/GRAPHIC 34-50-96-99B-023-A01.
N
OTE : Steps h. and i. may have to be repeated to get an
odd encoding since the transponder alternates the
encoding of latitude and longitude data on odd and
even inter vals at rates of either 100 or 200 ms.
9.3C GPS Bus / Airborne Position Extended Squitter / Time Tag
Ve r ification (-408/-409 )
Final Performance (Customer Acceptance) Test. Cont.
T
able 1001/Table 34-50-96-99A-009-A01
34-50-96
Page 1028
Dec 16/09