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A 737-300/400/500MAINTENANCE MANUAL
G. Reply Frequency Test
S 865-115
(1) Do a check of the Reply Frequency.
(a) Make sure the reply frequency of the transponder is 1090 MHz |3MHz.
S 865-112
(2) Do a check of the Reply Delay.
(a) Make sure the reply delay is 3.00us (|0.50us) for ATCRBS mode.
S 865-141
(3) Do a check of the Reply Jitter.
(a)
Make sure the reply jitter is 0.06us for all call.
(b)
Make sure the reply jitter is 0.1us for ATCRBS modes.
S 865-142
(4) Do a check of the ATCRBS Reply.
(a)
Make sure the spacing of the F1 to F2 pulse is 20.3 us (|0.10us).
(b)
Make sure the duration of the F1, F2 pulse is 0.45us (|0.10us).
H. Suppression Test
S 875-116
(1) Do a check of the Side Lobe Suppression (SLS).
(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.
I. Sensitivity Test
S 735-111
(1) Do a check of the Minimum Triggering Level (MTL) Difference.
(a) Make sure the Minimum Triggering Level (MTL) difference between mode A and mode C is 1.0dBm.
S 735-112
(2) Do a check of the Minimum Triggering Level (MTL).
(a) Make sure the Minimum Triggering Level (MTL) is -73dBm (|4dBm).
J. Peak Output Power Test
S 865-133
(1) Do a check of the Peak Output Power.
(a) Make sure the peak power output of the transponder is between 70W (ERP = 48.5 dBm) and 500W (ERP = 57.0 dBm).
K. Transponder Code Capability Test
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737-300/400/500MAINTENANCE MANUAL
S 865-140
CAUTION:_______DO NOT USE CODES 7500, 7600-7677, 7700-7777. THESE ARE EMERGENCY CODES
(1) Set the code select switch on the ATC control panel to an arbritary code.
(a) Make sure the ATC test set shows PASSED and the selected ATC code is shown in the code field.
S 865-135
(2) Push and release the IDENT switch on the ATC control panel.
(a) Make sure the ATC test set shows ID in the code field for 15 to 30 seconds.
L. Altitude Reporting Test
S 865-118
(1)
Set the altitude reporting on.
S 865-157
(2)
Connect the air data test set to the applicable pitot-static system (AMM 34-11-00/501, for airplanes without EFIS, or AMM 34-11-01/501, for airplanes with EFIS).
S 865-119
(3)
Set the applicable altimeter to 29.92 inches of mercury.
S 865-159
(4)
Apply a static pressure with the air data test set (AMM 34-11-00/501 for airplanes without EFIS or AMM 34-11-01/501 for airplanes with EFIS) to get the altitude values specified in FIG. 501.
NOTE: The altitude value is shown on the ALT field of the ATC test
____
set.
(a) Make sure that the applicable altimeter shows within | 125 feet of the test altitude shown by the test set.
S 865-120
(5)
Set the altitude reporting off.
(6)
Set the ATC select switch to stand-by or off.
S 865-121
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A
737-300/400/500MAINTENANCE MANUAL
ATC SYSTEM - DESCRIPTION AND OPERATION
______________________________________
1. General (Fig. 1)_______
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