Avionics qualification testing requires supporting equipment that properly simulates aircraft environments. This equipment must simulate interface loading, provide EMI protection for test cards, and isolate interfaces during loopback testing. Standardized test cards have been designed that meet these requirements for common avionics interfaces like ARINC429 and RS422, minimizing engineering effort compared to custom equipment. These test cards support successful avionics qualification testing.

1. Avionics Qualification Test
Cards
Electronic Design Service, LLC
EMI Qualification Test Solution
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2. Avionics Qualification Test Supporting
Equipment
Avionics qualification testing is most important part of avionics design process,
which is assigned to support avionics certification. The failure of any qualification
test is very often a reason of redesign. But a lot of failures happened due to
incorrect design of support equipment.
Test supporting equipment is used for proper simulation of aircraft environment
during qualification testing. This equipment should simulate the real loading of EUT
communication interfaces, provide EMI protection of standard avionics simulation
test cards (in case of using them instead of active loopback test approach) and
isolate avionics interfaces from interference if the loopback test approach is
used.
So, the design of qualification supporting equipment with the characteristics,
which meet all qualification test requirements, is extremely important for project
success.
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3. Avionics Qualification Test Supporting
Equipment (CONT.)
The existing avionics design practice is to design or redesign old specific
supporting test equipment for project. It usually takes significant engineering
effort. This type of efforts can be minimized in case of using avionics
qualification test cards, which were specially designed for standard avionics
interfaces. The design of these cards covers the highest level of qualification
requirements and specific test conditions, which are usually required by most of
aircraft designers.
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4. Avionics Qualification Test Supporting
Equipment (CONT.)
There are some major requirements for standardized qualification supporting
equipment:
- Electrical compatibility with EUT interfaces
- Protection from EMI environmental during test
- Ability to simulate electrical loading for simulated interfaces
- Ability to support connection with standard avionics test equipment and their
protection from qualification test environmental
- Ability to create flexible avionics interface channels connections for loopback
approach realization
- Ability to provide electrical and loading separations in case of loopback test
approach using
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5. Avionics Qualification Test Supporting
Equipment (CONT.)
The idea of designing the standardized avionics qualification test cards and
providing them for avionics equipment designers was successfully
implemented now.
The wide spectrum of avionics qualification test cards, which support
qualification testing of discrete ground/open, discrete voltage/open,
ARINC429, ARINC717, ARINC664 and RS422 interfaces can be found here:
www.eldesignservice.com
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