You may have noticed that all household electronic equipment bears the following statement:
“This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference; and
(2) This device must accept any interference received, including interference that may cause undesired operation.”
Part 1 is self-explanatory. Part 2 has bothered me for a while. Why would rules require a device to be susceptible to harmful interference?