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Re: garage remote jamming



"Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote:

>"Bill Kearney" <wkearney-99@hot-mail-com> wrote in message
>news:dZudnUaUzvLjDXjYnZ2dnUVZ_veinZ2d@xxxxxxxxxxxxxxxx
>> > With more and more HA applications using RF in some manner, it will
>> > likely be an ongoing issue
>>
>> Oh please, that's just completely unsubstantiated FUD.
>
>I wouldn't say that.  This is at least the third instance I've heard or read
>about where significant numbers of people have had to retool to accommodate
>new RF interference from military ops.  If there are three we know about
>that usually means that there are plenty more that we don't hear about.  If
>you were to experience any problems and called the Post to say your Lutron
>RA system was hosed, it would very likely *never* be considered newsworthy
>because so few others would likely be calling in.  Same for an X-10 or
>Z-wave system.  Not enough users for anyone to care if the Marines were
>jamming them.  Garage openers and automobile key fobs?  Lots of users to
>complain.

As military, police, fire, etc. need additional frequencies, the bands used
by unlicensed low-power consumer applications are a logical place to look.
As we've seen in this case, they can't even be bothered to ask the FCC what
technologies they will likely be stepping on and how many people they might
inconvenience. I doubt this will be the only instance.

>> > It's one more reason why I think a reliable PLC system
>>
>> Which have proven themselves to be horrendously unreliable in residential
>> settings.  No thanks.
>
>If it's absolutely, positively got to work without any possibility of
>interference, go hard wired.  Neither PLC nor RF is immune to interference.

I did say "retrofit". I agree that hard wired is best but it's not always
easy to retrofit. I would keep an eye on HPCC (HomePlug Command & Control).
Yitran Communications was chosen to supply the chips and they showed a
system at the most recent CES show. It is supposed to be reliable and low
cost.

     http://www.itrancomm.com/comnd.htm

One footnote to the KKR-Texas Pacific buyout of TXU is that they are
planning a system wide Access BPL system using the same HomePlug based
technology from Current that has been operating in the Cincinnati area for a
few years now (with no apparent problems despite ARRL propaganda).

Access and in-house BPL prove PLC can be reliable. It remains to be see if
HPCC can be both reliable and low cost but the next couple of years should
answer that.

http://davehouston.net
http://tech.groups.yahoo.com/group/roZetta/
roZetta-subscribe@xxxxxxxxxxxxxxx


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