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A
737-300/400/500MAINTENANCE MANUAL
S 865-207
(14) Push the TEST switch on the test set to run the ATCRBS/A only test.
(a) Make sure the test set shows NO Reply From XPDR.
S 865-208
(15) Push the TEST switch on the test set to run the ATCRBS/C only test.
(a) Make sure the test set shows No Reply From XPDR.
S 865-209
(16) Push the TEST switch on the test set to run the Mode S Surv (Identity/Altitude/Short) test.
(a) Make sure the test set shows the airplane's mode S address, the airplane's altitude, and %REPLY greater than 90%.
S 865-210
(17) Push the TEST switch on the test set to run the Undesired replies test.
(a) Make sure the test set shows No Replies.
S 865-211
(18) Push the TEST switch on the test set to run the Squitter test.
(a) Make sure the test set shows PASS.
S 735-250
(19) For test set with the TAP 125 option, push the TEST switch on the test set to run the Mode S Diveristy Channel Isolation Test.
NOTE: The test set should show the Diversity test page.
____
(a) Make sure the test set shows PASS.
S 735-090
(20) For test set without the TAP 125 option, do the Mode S Diversity Channel Isolation Test as follows:
(a) Disconnect the antenna cable at the top antenna switch connector D2703.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH MODE S ú
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737-300/400/500MAINTENANCE MANUAL
(b)
Install the cable between the coax switch S942 connector D2703 and the through line wattmeter input.
(c)
Install the airplane antenna cable to the output of the wattmeter.
NOTE: Make sure the correct element is installed into the
____ sample port of the wattmeter.
(d)
Turn the element to the stop to select the direction of the power toward the antenna.
(e)
Make a note of the maximum power output and the minimum power output measured by the RF through-line wattmeter during the mode S squitter transmission period. 1) Make sure the minimum power output is 100 times or 20 db
lower than the maximum power output.
(f)
Disconnect the RF through-line wattmeter.
(g)
Connect the antenna cable at the top antenna switch connector, D2703.
S 865-230
(21) Remove the antenna coupler from the lower ATC antenna and insert it to the top ATC antenna.
NOTE: Make sure the orientation of antenna coupler setup is
____
correct.
S 735-091
(22) Do the ATC Mode S Transponder Check again for the other ATC system.
NOTE: Use the other ATC antenna.
____
G. Put the Airplane Back to its Usual Condition
S 845-092
(1)
Remove the antenna coupler and the test set.
S 865-200
(2)
Close this circuit breaker.
(a) P6 Circuit Breaker Panel:
1) AIR/GND and LTS
(3)
Remove electrical power if it is not necessary (Ref 24-22-00/201).
S 845-093
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 导航 NAVIGATION 4(10)
