Homeowner Forum / Security Alarms / February 2004

Happy wireless alarm owners..
Have a jingling bell year all the time with that build in RFI
detection circuit nobody can explain how it distinguish a receiver
muzzling problem from a sensor failures..

Hello all. I am an exteme newbie. Frankly , I do not know much about
alarms at all. I am pretty handy so not a total ignorant.
My house has an ancient Ademco 330. It seems to work . All the doors
and windows have working sensors, the roof has a bell, and the inside

I have a question for those of you that have placed "displayed" i.e. quarter
page, half page advertising in the local yellow pages of Qwest.  My question is
this.
How many of the calls generated from the ads were individuals asking or seeking

(fwd) Re: =>20 Blind purshase of Wireless alarm systems
Date: 2/8/2004 6:48:21 AM Eastern Standard Time
Mark, check yor Dell for a virus or Paul is having fun again.
Mike

Rodney, you've mentioned problems you were having in CO with alarmco's and GC's
using unlicensed and illegal workers.  Maybe you need to get your state to
start taking affirmative action.  As you know AZ has begun cracking down on
unlicensed contractors, they are now issuing arrest ...

YOU have a wireless alarm system with that (so called) maintenance
pro's "imaginative" RFI detection circuit?
Wireless remain anyhow:
UNRELIABLE during Radio Frequency Interferences (RFI)

Top NOTE:
RFI stands for "Radio Frequency Interference" and take place when two
or more transmitted signals are received at the same time by the
wireless alarm system receiver.

My wireless alarm system was "deaf" and "dead" during the use of an
FCC like authorized wireless radio "headphone", that simple...
Unfortunately this authority authorized and certified device
transmitted on the shared and not protected wireless alarm system

What type of signals are able to produce RFI (Radio Frequency
Interference) on Wireless Alarm Systems and will jeopardize they're
operation?
RF Transmitters operating:

Some pro's say that wireless alarm system are certified and due to
that Radio Frequency Interference (RFI) protected, lets put it in the
right context.
Let's show that the equipment certification process has nothing to do

Its time to give some Complementary and more detailed technical
information on the Wireless Alarm System "Data communication link
techniques" in order to clarify Radio Frequency Interference (RFI)
susceptibility of such devices.

In order to avoid confusions i like to approach some "hidden" FCC
requirements.
Why hidden?
Because they are not apparent (?) but unavoidable during the

Everybody knows that wireless alarm systems are unreliable during
Radio Frequency Interference (RFI) because the transmission path of
signals between sensors and wireless receiver is muzzled by an
external transmitter causing RFI.

Regardless of some that try to flood the fish by mentioning unrealized
performances of spread spectrum (SS) in wireless alarm systems,
regardless the invalid comparisons with military equipment, everybody
knows that wireless alarm systems are unreliable during Radio

Some pro's "think" there is nothing wrong with wireless alarm
system... for years... experience... NO WARNING.
Are they're systems still operational or just dead?
When a Radio Frequency Interference (RFI) occurs, the system is no