To add to this, avionics are required to pass DO-160 environmental testing, which includes interference. So that testing should show that the equipment can't be interfered with by outside signals of X power. If they do interfere, then that's an indication that the testing was done incorrectly or didn't pass.
zookeepier t1_j2xps7t wrote
Reply to comment by Mikeyme1998 in IAMA Canadian Avionics Technician, specializing in line maintenance and Garmin flight deck installations on a number of different airframes. Please, ask me anything! by Mikeyme1998
To add to this, avionics are required to pass DO-160 environmental testing, which includes interference. So that testing should show that the equipment can't be interfered with by outside signals of X power. If they do interfere, then that's an indication that the testing was done incorrectly or didn't pass.