Revision 4 - December 17,1998 Ryan TCAD 9900 Series Page 4-1
SECTION IV
PERFORMANCE TESTING
Proper testing of the TCAD in the host (TCAD Equipped) aircraft is
essential. Proper operation of critical functions can only be checked
during the Performance Test. Failures of these tests mean improper or
marginal performance of the TCAD. Performance testing is the most
important part of the installation.
4.1 GENERAL
Performance testing of the TCAD is conducted using standard test equipment.
There are three tests:
Computer Test:
To check the computer functions in TCAD. This test may be used for initial
testing or for troubleshooting.
Ramp Test:
To check the function of the TCAD, to confirm proper operation
of the host transponder and altitude encoder with TCAD on, to verify proper
computer receiver interface, to check antenna connections and to check the
interconnections with other equipment.
Audio Level Test:
To check correct audio level.
4.2 EQUIPMENT REQUIRED
A. Transponder Test Set, IFR Model ATC-1200Y3 or equivalent.
B. Power Supply, 11-29V @5A, Hewlett Packard E3632A or equivalent.
4.3 COMPUTER TEST
This test may be performed when TCAD is isolated from the aircraft. The test can also be
performed in the aircraft. If the test is performed in the aircraft, disregard the Setup
instructions.
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