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B
(2)
System Interconnect Check
To check the aircraft and transponder system interconnections proceed
as follows:
(a)
(b)
(c)
(3)
Visual Inspection
In conjunction with system installation, perform the inspection/check
procedure (Table 2-1 in this section).
(4)
Post-Installation Test
The Post-Installation Test verifies the proper operation of the KT 76C
Transponder System. Utilizing the self-test function and a ramp tester,
this procedure is used after the system units have been installed and
thereafter as an operational check. This procedure is comprised of a
pretest setup, manual test and ramp test. The following tests are per-
formed on the ground.
(a)
(b)
(c)
Rev 3, May 2004
ATCRBS TRANSPONDER
Check that all cables and interwiring are installed in accordance
with the Interwiring and Cable Harness Fabrication instructions
(paragraph 2.3.3).
Using the interconnect diagram (see
proper destination, opens, and shorts.
Check rf cables for insertion loss and VSWR.
Pretest Setup
1)
Check KT 76C system source power as follows:
a)
Confirm that aircraft 11-33 V dc is operational.
b)
Confirm that the aircraft panel background lighting power
source is operational by adjusting the cockpit dimmer
switch for proper cockpit panel illumination.
2)
Operate appropriate aircraft circuit breakers and switches to
apply power to the system as follows:
a)
Apply 11-33 V dc to transponder #1 and if applicable
transponder #2.
b)
Apply primary power inputs to all that interfaces with the
transponder(s) per the system configuration.
3)
Verify that all KT 76C circuit breakers are closed.
4)
Allow for warm-up.
5)
Verify the 4096 code is annunciated on the ATC IDENT code
display with mode select switch in the "SBY" position.
Self-Test
The KT 76C transponder self-test is initiated from the front panel.
1)
On the KT 76C rotate the Mode select knob to "TST". Verify
that all segments on both the altitude and ident windows on
the display illuminate.
Manual Test
This test checks the ATC IDENT code switches and display.
IM 006-10545-0003.dwd
Figure
2-2), check wiring for
KT 76C
Page 2-15
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