Home' RTCA Documents for Review : DO-262D Contents Appendix D
© RTCA, 2018
EQUIPMENT PERFORMANCE VERIFICATION PROCEDURES
The following procedures provide guidelines for tests to ensure compliance with the
MOPS performance requirements. Fight testing is not mandatory for these
requirements. Regarding secondary references from this section, any reference to
"flight tests" in lower level documents should be ignored.
Some of the following tests may require additional test equipment not shown in the
test setup figures. Such equipment would be associated with the interface between
the satellite system emulator and the AES or radio channel unit.
Definitions of Terms and Conditions of Test
The following are definitions of terms and the conditions under which the tests
described in this Section should be conducted:
Power Input Voltage – Unless otherwise specified, all tests shall be conducted
with the power input voltage adjusted to design voltage +2%. The input voltage
shall be measured at the input terminals of the equipment under test.
b. Power Input Frequency
1) In the case of equipment designed for operation from an AC source of
essentially constant frequency (e.g., 400 Hz), the input frequency shall be
adjusted to design frequency +2%.
2) In the case of equipment designed for operation from an AC source of
variable frequency (e.g., 300 to 1,000 Hz), unless otherwise specified,
tests shall be conducted with the input frequency adjusted to within 5% of
a selected frequency and within the range for which the equipment is
Adjustment of Equipment – The circuits of the equipment under test shall be
properly aligned and otherwise adjusted in accordance with the manufacturer's
recommended practices prior to application of the specified tests.
d. Test Equipment – All equipment used in the performance of the tests should
be identified by make, model and serial number where appropriate, and its
latest calibration date. When appropriate, all test equipment calibration
standards should be traceable to national and/or international standards.
Specific Transceiver Controller PC software is only available through Iridium for
partners under development agreements. Contact Iridium for more information
on obtaining this software.
Test Instrument Precautions – Due precautions shall be taken during the
tests to prevent the introduction of errors resulting from the connection of
voltmeters, oscilloscopes and other test instruments across the input and output
impedances of the equipment under test. Further, any induced noise floor
generated by amplifiers or other equipment must be accounted for in the
testing results. Therefore, any adjustment required should be declared as part
of the test results based on the equipment used in the testing.
Ambient Conditions – Unless otherwise specified, all tests shall be made
within the following ambient conditions:
1. Temperature: +15 to +35 degrees C (+59 to +95 degrees F)
2. Relative Humidity: Not greater than 85%
3. Ambient Pressure: 84 to 107 kPa (equivalent to +5,000 to -1,500 ft)
(+1,525 to -460 m)
When tests are conducted at ambient conditions which differ from the above
values, allowances shall be made and the differences recorded.
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