5.14 Flashcards
What is Electromagnetic compatibility(EMC) ?
EMC is a property of electrical and electronic equipment that allows it to operate as intended around other electrical and electronic equipment, and not to adversely interfere with that other equipment.
What must be looked in the EMC process?
What does the component emit-emissions
Susceptibility- how susceptible is the component to outside emissions
Name the two factors of EMC
Electromagnetic Interference (EMI) and Electromagnetic Susceptibility (EMS)
What must be done to EMI components?
EMI “dirty” components must be isolated and separated from the shielded “clean components”
Why must cabling be grounded and shielded?
To protect against external interference from passenger devices
To protect against High intensity Radiated Fields
To protect against lightning strikes
What is EMI?
Electromagnetic Interference (EMI) is the interference caused by one electrical or electronic device to another by the electromagnetic fields produced as it operates.
Radio equipment is designed to receive electromagnetic energy, True or False?
True
What are some common effects of EMI?
Desensitising of radio and radar receivers
False indications in radar and navigation equipment
Unwanted noise on audio signals
Repetitive buzzing on intercom
What on the aircraft can radiate EMI?
Radio and Radar transmitters
Databus cables unless its fibre optic
What does HIRF stand for?
High intensity radiated fields
What is the difference between EMI and HIRF
The principles are similar to EMI except that the source is usually of very high power.
what has the capability of adversely affecting the operation of aircraft electrical and electronic systems?
Radio, Radar and Television transmissions and high-power radio and microwave towers, including Air Traffic Control (ATC) primary surveillance radars
