GENERAL AEROSPACE
Boeing 737-300
MAINTENANCE MANUAL
EFFECTIVITY
PW245
34-53-00GA
DRAWING # GA-BC17-ATC-MM
Page 509
Use and disclosure shall be in accordance with the proprietary legend located on the cover of this document
AUG 15/10
NOTE:
Effective Radiated Power (ERP) is the product of the antenna output power and antenna
gain.
(e)
Make sure the receiver sensitivity, Minimum Threshold Level (MTL), is -74
±
3 dBm.
NOTE
: An additional 3dBm loss is allowed to compensate for antenna coupling errors. Also,
make sure to correct for other factors that would change the sensitivity measurement.
(f)
Make sure the frequency deviation is less than
±
1 MHz.
(g)
The test set automatically does a check on the MTL difference between mode A and mode C. If
the MTL value difference is greater than 1.0 dBm, the test set will show the FAIL indication and
stops the test.
(7)
For individual test, use the TEST switch to step through each test.
(a)
Do a check on each test result after each test.
(8)
Change the ATC ID code on the ATC Control Panel to its compliment. The compliment of the code is
7777 minus the code.
EXAMPLE: If the code is 0340, its compliment is: 7777 - 0340 = 7437 compliment.
(9)
Push the identification switch on the ATC Control Panel.
(10)
Push the TEST switch on the test set to run ATCRBS/A test.
(a)
Make sure the test set shows the IDENT indication, the ATC ID code selected on the ATC Control
Panel, and a %REPLY greater than 90%.
(11)
Push the TEST switch on the test set to run the ATCRBS/C test.
(a)
Make sure the test set shows the airplane's altitude and %REPLY greater than 90%.
NOTE
: Make sure the reported altitude is within
±
125 feet of the altitude shown on captain's and
first officer's altimeter.
(12)
Push the TEST switch on the test set to run the ATCRBS/A Mode S ALL test. (Mode-S transponder
only).
(a)
Make sure the test set shows the airplane's mode S address and % REPLY greater than 90%.
(13)
Push the TEST switch on the test set to run the ATCRBS/C Mode S ALL test. (Mode-S transponder
only).
(a)
Make sure the test set shows the airplane's mode S address and % REPLY greater than 90%.
(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.
(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.
(16)
Push the TEST switch on the test set to run the Mode S Surv. (Identity/Altitude/Short) test. (Mode-S
transponder only).
(a)
Make sure the test set shows the airplane's mode S address, the airplane's altitude, and %REPLY
greater than 90%.
(17)
Push the TEST switch on the test set to run the undesired replies test.
(a)
Make sure the test set shows No Replies.
(18)
Push the TEST switch on the test set to run the squitter test. (Mode-S transponder only).
(a)
Make sure the test set shows PASS.
(19)
For test set with the TAP 125 option, push the TEST switch on the test set to run the Mode S Diversity
Channel Isolation Test. (Mode-S transponder only).
NOTE:
The test set should show the Diversity test page.
