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B
(d)
(e)
C.
Ramp Test (optional)
This test requires the use of an ATCRBS Ramp Tester. Specific instructions
for operating the ramp tester are contained in the applicable operator's man-
ual. In systems with dual transponders and altitude sources configure the
system to check each function. Table 2-2 lists tests that will be performed
during ramp testing. In addition, Table 2-2 contains a brief description of each
test and the pass/fail criteria.
Rev 3, May 2004
ATCRBS TRANSPONDER
a)
Verify that the ID code entry is initiated by pressing one of the
eight code selection switches. The left most significant (MSB)
display digit will change to reflect the code selection switch
that was pressed and the remaining three display digits are re-
placed by dashes. Subsequent ID code digits may be entered
by pressing the appropriate code selection switch.
The next displayed digit will change to reflect the code selec-
tion switch that was pressed. This sequence continues until
the last digit (LSB) is entered. The new 4 digit code should
now be displayed.
b)
Verify that pressing the CLR push-button switch replaces the
last digit entered with a dash (-). Subsequent presses of the
CLR push-button will replace existing digits with dashes, until
the display is all dashes.
c)
Verify that after four to six seconds of no activity on the CLR,
VFR, or Code Selection switches, the display reverts back to
the previously entered code.
Conformity Inspection
Visually inspect the installed equipment to determine the use of ac-
ceptable workmanship and engineering practices. Verify that all
mechanical and electrical connections have been made properly.
Ramp Test
The following test will be conducted to verify operation.
Reply Frequency - Verify that the reply frequency is 1090 +/- 3
MHz.
IM 006-10545-0003.dwd
KT 76C
Page 2-16
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