Originally Posted by jesty
but it has no radio transmission/reception functionality.
You have to consider two seperate scenarios:
i) Very low level EM radiation from ANY electronic circuits (especially digital).
ii) High level EM radiation from an intended transmitter (mobile/cellphone etc)
(ii) Can and does have an effect on other electronic circuits (not just radio receivers). Can cause data corruption, glitches, instrument errors etc. How likely this is depends on how close the transmitter is to the 'victim' equipment and how 'immune' the victim is to such EM radiation.
(ii) Can also cause some receiving equipment to saturate, malfunction or be blocked even if it is not operating on the the frequency band.
(i) The EM interference generated by the equipment may just happen to fall on a frequency used by an avionics receiver on board. This causes loss of sensitivity, intereference etc and may be transient or constant.
Every case is dependant on many parameters and the overall situation can be likened to a risk-management approach.
How much risk do you consider acceptable?
