(c)
Make sure the reply jitter is 0.1us for ATC A and C.
S 735-060
(9) Do a check of the ATCRBS REPLY TEST.
(a)
Make sure the spacing of the F1 to F2 pulse is 20.3us (|0.10us) .
(b)
Make sure the duration of the F1, F2 pulse is 0.45us (|0.10us).
S 735-061
(10) Do a check of the SLS LEVEL TEST.
(a) Make sure the reply is received when the SLS pulse is -9dB and no reply is received when the SLS pulse is 0dB.
NOTE: Run the SLS level test in less than 95 feet
____
(28.96 meters) of the UUT antenna.
S 735-062
(11) Do a check of the ATC ONLY ALL-CALL TEST.
(a) Make sure the mode S transponder did not reply to the
interrogation (PASSED TEST).
S 735-063
(12) Do a check of the MODE S ALL CALL TEST.
(a) Make sure the test set shows PASSED and the airplane's mode S address.
S 735-064
(13) Do a check of the INVALID MODE S ADDRESS TEST.
(a) Make sure the mode S transponder did not reply (PASSED TEST).
S 735-065
(14) Do a check of the SPR ON/OFF TEST.
(a) Make sure a reply is receive when SPR is ON and no reply is receive when SPR is OFF.
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737-300/400/500MAINTENANCE MANUAL
S 735-066
(15) Do a check of the MODE S UF0 TEST.
(a) Make sure (Down-link format) DF=0, AC=(airplane's altitude) and ADDRESS=(airplane's mode S address) (WDM 34-53-12).
NOTE: Make sure the reported altitude is within | 125 feet
____ of the local field elevation altitude shown on captain's and first officer's altimeter (applicable for all altitude reporting check).
S 735-067
(16) Do a check of the MODE S UF4 TEST.
(a) Make sure DF=4, AC=(airplane's altitude) and
ADDRESS=(airplane's mode address).
S 735-068
(17) Do a check of the MODE S UF5 TEST.
(a) Make sure DF=5, ID=(selected ATC ID code on the ATC control panel) and ADDRESS=(airplane's mode S address).
S 735-069
(18) Do a check of the MODE S UF11 TEST.
(a) Make sure DF=11 and AA=(airplane's address).
S 735-070
(19) Do a check of the MODE S UF16 TEST.
(a) Make sure DF=16, AC=(airplane's altitude) and
ADDRESS=(airplane's mode S address).
NOTE: No reply to the UF16 test is not a failure of the ATC
____
system.
S 735-071
(20) Do a check of the MODE S UF20 TEST.
(a) Make sure DF=20, AC=(airplane's altitude) and
ADDRESS=(airplane's mode S address).
NOTE: No reply to the UF20 test is not a failure of the ATC
____
system.
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A 737-300/400/500MAINTENANCE MANUAL
S 735-072
(21) Do a check of the MODE S UF21 TEST.
(a) Make sure DF=21, ID=(selected ATC ID code on the ATC control panel) and ADDRESS=(airplane's mode S address).
NOTE: No reply to the UF21 test is not a failure of the ATC
____
system.
S 735-073
(22) Do a check of the SQUITTER TEST.
(a) Make sure the squitter's period is between 0.8 to 1.2 seconds.
S 735-074
(23) Do a check of the FREQUENCY TEST.
(a) Make sure the reply frequency of the transponder is 1090 MHz |1MHz.
S 865-171
(24) Move the test set to less than 50 feet from the top ATC antenna.
NOTE: Make sure the top ATC antenna is not in the line of
____ sight of the test set antenna. Follow the test set operator's quide to reduce multipath errors. Do the test several times with the test set at different locations until you get valid results.
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