Homeowner Forum / Security Alarms / February 2004

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

What does it mean if my display beeps once every 30 seconds or so and
12 appears and disapears from the display?

Been reading more than posting for awhile. Had some recent requests from
some of the regulars to start contributing again. I see some others are
starting to become active again and some new to the group as well.
Bob4Secur

What is the difference between HIM and our little Friendly Elf?
In some hours you'll know it!
Thomas Cooper
http://www.xxsecurity.com

Confused about which panel to buy and who to deal with ?
There can be a great deal of information to deal with after getting several
quotes from suppliers! Remember, in Ontario, unlike every other province in
Canada, or state in the USA, this is a totally unregulated market !! There

ok i am getting a new house in may....Thanks you..
Now i would like to setup a pretty good home automation system..
i dont do residential stuff.. so i am out of the loop for all this...
(ask me to do an access system with positive identification and it will be

RFI stands for Radio Frequency Interference, in other words, when two
(or more) simultaneous transmissions appears on the same frequency and
reaches the wireless alarm radio receiver this last get confused most
of the time due to what is called interference.

My wireless alarm system was "deaf" and "dead" when i used a wireless
radio headphone, that simple (other transmitter sources do it to, list
provided in part 4:).
This wireless headphone story showed me "how simple it is" to have

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

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

I have purchased a home with an ademco 6128 keypad. It was in working
condition except no codes are known. How can I program this thing. I
downloaded some instructions from the web but it seems that I need a
master code to enter a user code. Any suggestions?

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.

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