[AMRadio] QRM fron Neighbor's Security System


sbjohnston at aol.com sbjohnston at aol.com
Thu Jan 21 20:55:41 EST 2010


Part 15 devices have to be shut down if they interfere with any other 
licensed radio service.  It can be difficult at times to make that 
stick, but it *is* the rule.  Doesn't matter their mode or power.

Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
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-----Original Message-----
From: JAMES HANLON <knjhanlon at msn.com>
To: james.liles at comcast.net
Cc: AMradio <amradio at mailman.qth.net>
Sent: Thu, Jan 21, 2010 6:51 pm
Subject: [AMRadio] QRM fron Neighbor's Security System


Jim,

You reported the following.  "I have recorded a problem like this with 
an 8566B
in peak mode.  There is a
continuous sweep from about 7.1mc to 8.5mc at a two to five second 
rate.
Traced it to a neighbor who just installed the X10 security and home 
control
system.  It's using the spread spectrum protocol and under 100mw but at 
300
feet, makes 40 meters unusable.  Appears that the FCC has lost control 
to
dollars."

If I had a problem like that, I would discuss it with Ed Hare, W1RFI, 
the ARRL
Laboratory Manager.  Ed is quite active in fighting RFI, especially 
that
involved with BPL systems.  I am pretty sure that you do not have to 
just accept
whatever QRM is generated by your neighbor's unlicensed security 
system.  Ed
would advise you on your rights and on how to proceed.  You can reach 
him at
w1rfi at arrl.org<mailto:w1rfi at arrl.org> .

Jim Hanlon, W8KGI

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