MIL-STD-704 Aircraft Electrical Power Specifications Standard, prepared by the United States (US) Department of Defense, is a military standard that covers issues such as voltage, frequency, phase, fluctuation and maximum current in a military aircraft and its equipment. The most current version of the standard is MIL-STD-704F_CHG-1, published in 2016. However, this standard is not a standard that only covers the US military and its subcontractors, but is a globally accepted standard for evaluating the suitability of military aircraft and systems. It is converted to the voltage levels required for the operation of the equipment used in the aircraft power system, which comes with a power source that complies with the MIL-STD-704 standard. In order for a piece of equipment to operate in accordance with the MIL-STD-704 standard, it must pass MIL-STD-704 tests to see its effects under difficult conditions and to verify its conformity.

The LDC103 Voltage Distortion Spectrum Test is performed to verify that 28V DC power handling equipment operates and maintains specified performance when subjected to voltage disturbances at the frequencies and amplitudes specified in MIL-STD-704. Equipment used in the LDC103 Voltage Distortion Spectrum Test must not be damaged or cause an unsafe condition.

The utility equipment is considered to have passed if, when subjected to voltage disturbances as specified by the LDC103 Voltage Distortion Spectrum Test in applicable editions of MIL-STD-704 and as specified in the table, the utility equipment operates and maintains its performance as specified in the usage equipment performance specification document for normal aircraft electrical conditions . In the LDC103 Voltage Distortion Spectrum Test, the usage equipment must maintain the specified performance for a period of time verifying that the usage equipment can operate continuously when supplied with voltage distortion power. LDC103 Voltage Distortion Spectrum Test operating equipment must not be damaged or cause an unsafe condition.