Legalities and signal jamming

Wouldn't it make more sense to build a field strength meter?

A band selectable tuned circuit could be nice, but the instrument would still cover a greater range of possibilites than a jammer would.

I deny ever making a similar device for jamming a neighbors TV reception.

Luhan Monat (luhanxmonat-at-yahoo^dot^com)

If it's on a license-free band, then there's no problem from the FCC - the band is license-free, so you can do whatever you want. You would only have to contend with the guy whose signal you're jamming.

If it's in one of the bands that needs a license, then you need to comply with the licensing requirements, and not cause any interference to any other equipment. I believe that there are certain very low signal levels that don't need a license, but I'd look very carefully at the regulations on that. And even so, you'd still have to contend with the guy whose signal you're jamming.

Good Luck! Rich

I think that 'license free' bands are actually not quite that simple. Usually the rule is two part - the unlicensed device must accept any interference from other sources, and must not cause any interference to other services. As such, license free only means free to (attempt to) use, not free to jam other users.

What's unlcear is if the must not cause interefernce applies only to licensed services or to other unlicensed services as well - my guess is that if the intent to cause interference is intentional, then the prohibition probably would apply.

You may be able to find a legitimate non-communications device which cases the desired interference though. I had a very nice microwave link running the lab until someone turned on the microwave oven in the kitchenette...

It's easier to build a broadband or multiband field strength meter than a broadband jammer. Who says the hidden camera is 2.4 GHz? There are many possibilities, and detecting them all is easier than jamming them all, at least for continuously transmitting devices.

Store and burst is another issue.

Easy if you have a spectrum analyzer.

Yes, it would be better. But then if you find it and hammer it to pieces, you wont catch the spy. logic is, if you can jam the signal and setup your own camera to record area. You then catch the spy trying to fix what went wrong with his camera. JTT.