TIC TR-220 - Page 38

Rev E TR-220 90 008 088-1
2-21
17. Toggle the AUTO/TEST/MANUAL switch to MANUAL to advance to the next
sequence:
18. Toggle the AUTO/TEST/MANUAL switch to MANUAL to advance to the next
sequence:
19. Toggle the AUTO/TEST/MANUAL switch to MANUAL to advance to the next
sequence:
M S Comm Alt /
Testing . . .
Mode S Communication Altitude Test. Test
Set will transmit a COMM A/B transmission
utilizing the UF=4/RR:18 format. This tests
the transponders communication and data-
link ca
p
abilities.
Test complete. A successful DF=20 Reply
will display UUT Altitude (10000’) and
Receiver Efficiency as a percentage
M S Comm Alt /
10000’ 100%
Undesrd Rply /
Testing . . .
Undesired Replies Test initialized. The
Test Set will make randomly addressed
interrogations.
Test complete. If the UUT replies to any of
the random interrogations, “FAIL” will be
displayed. A “PASS” indicates the UUT did
not reply as required. The test set uses a
minimum of 3 random addresses to comply
with FAR 43 App F.
Undesrd Rply /
PASS
Squitter /
Testing . . .
The Test Set will not transmit interrogations
but receive and process DF=11 and DF=17
extended replies.
Test complete. Upon detection of the
replies, the Test Set will display the interval
time of the messages (if received) in
milliseconds (900 ms). If either a DF=11 or
DF=17 extended message is not acquired,
NOT DETECTED will be displayed.
ACQ: PASS 900 ms
ADD: A02008 II:0
EXT: NOT DETECTED
EXT: PASS 500 ms
ADD: A02008 II:0
If and Extended Squitter “IS” detected, the
following display indicating the interval time
and address.