1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation.

You've all seen this printed on all types of devices, but what does it mean?

"This device must accept..."
Alright, but why? Why does the device have to accept any received interference?

You've all seen this printed on all types of devices, but what does it mean?

"This device must accept..."
Alright, but why? Why does the device have to accept any received interference?

I think what they mean is that it must be designed so it won't get totally fucked up if there is interference.

Yea, but it also says that it has to accept interference that will cause undesirable operation, aka fuck it up.

No, not fuck it up -- undesirable operation on a radio receiver, for example, is playing static. Fucking it up is destroying it. There is a difference.

dont quote me on this, but i think the EAS system are capable of transmitting on many many frequencies, so if something really fucked up happened, say, nuclear war, your device would be able to hear the alert instead of filter it out as unusual background signals .

It can't. It can only transmit on many sources, not on many frequencies, only broadcast spectrum ones. The EAS can penetrate not only TV and Radio, but also cell phones, blackberrys, e-mail, and even the WWW itself. Some jurisdictions are now installing Reverse 911, which allows a form of EAS to penetrate landline telephone (it'll have the audio announcement, minus the tones.)

Part 47, Section 11 of the Code of Federal Regulations deals with EAS (just so you can reference)

it means that. if you put a so stickered power suply next to a am/fm radio it shouldnt (under the act) cause any interference to the radio.

the second part means if you lived next to a buisness that used RTs and every time their base unit transmits it swiches the part 15 stickered 433mhz remote power swich you installed in ure house on and off then too bad because its a properly licenced base instalation and the wireless 433mhz switch is under Part 15. with the clause, ----including interference that may cause undesired operation------


same with some 2.4 gig av senders ect, if something that isnt there to cause harm (ie jammer) interferes with them too bad.

this all comes down to the harmful interference bit.

explanation...
IF the thing that makes your av sender not go is the neihbours cordless 2.4 gig phone, then too bad. its just doing what its designed to do and the channels clash

but if its a jammer built by him to bury that part of the band in static then you have grounds to complain to FCC because its there to cause HARMFULL interference. ie to you and everyone on the block.

It is so that they can transmit subliminal messages to you against your will, and censor your thoughts. It is just another travesty of evil. Typical FCC.