Section 15.0 Magnetic Effect
The purpose of this test is to determine the magnetic effect of the equipment to assist the installer in choosing the proper location of the equipment in the aircraft.

Section 16.0 Power Input
The purpose of this test is to define the various test conditions and procedures that may affect the input power to the device. This may include the 115 vac, 28 Vdc and 14 Vdc.

Section 17.0 Voltage Spike
This test determines whether the equipment can withstand the effects of voltage spikes arriving at the equipment on its power leads, either ac or dc. The main adverse effects to be anticipated are: (1). Permanent damage, component failure, insulation breakdown. (2) Susceptibility degradation, or changes in equipment performance.

Section 18.0 Audio Frequency Conducted Susceptibility - Power Inputs
This test determines whether equipment will accept frequency components of a magnitude normally expected when the equipment is installed in the aircraft. These frequency components are normally harmonically related to the power source fundamental frequency.

Section 19.0 Induced Signal Susceptibility
This test determines whether the equipment interconnect circuit configuration will accept a level of induced voltages caused by the installation environment. This section relates specifically to interfering signals related to the power frequency and its harmonics, audio frequency signals, and electrical transients that are generated by other on-board equipment or systems and coupled to sensitive circuits within the EUT through its interconnecting wiring.

Section 20.0 Radio Frequency Susceptibility (Radiated and Conducted)
These tests determine whether equipment will operate within performance specifications when equipment and its interconnecting wiring are exposed to a level of RF modulated power, either by a radiated RF field or by injection probe induction onto the power lines and interface circuit wiring.

Section 21.0 Emission of Radio Frequency Energy
These tests determine that the equipment does not emit undesired RF noise in excess of levels specified.

Section 22.0 Lightning Induced Transient Susceptibility
These test methods and procedures apply various waveforms to verify the capability of equipment to withstand effects of lightning induced electrical transients. The criteria for equipment performance in the presence of lightning transients shall be defined in the applicable equipment specification.

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