--
Guest
|
 Posted:
Sun Sep 12, 2004 12:30 pm Post subject:
1 . First announcement about RFI i made.. |
|
|
The announcement is that Wireless Alarm Systems are
unreliable during "Radio Frequency Interferences" known as RFI.
RFI take place when the wireless alarm system receiver receives two or
more transmitted signals simultaneously.
During RFI your system is:
DEAF on signal reception, and
DEAD on warning the worst being that
YOU DON'T KNOW IT, no warning.
What "normal in the air" types of signals are able to produce RFI who
will jeopardize theyre operation?
The "un voluntary" muzzling signals with RF Transmitters operating:
- At the wireless frequency (433 or 868 MHz)
- By Intermodulation
- On the IF frequency
- Saturating the receiver
- Harmonics
- Falling in the receiver band pass
- And more...
In essence the problems caused by interference is the fact that by no
way two (or more) devices can use simultaneously the same frequency.
Attitude of "so called" ALARM PROFESSIONALS:
I only wanted:
1. To point to pro's that simple but "involuntary" RFI, block alarm
warning THE WORST because it happen 7/7 days and 24/24 hours a day
2. I wanted to warn pro's regardless the fact that it can be provoked
with a simple low power (portable) transmitter from the outside by
intruders...
Since I mentioned that, at a sudden PRO'S DISCOVERED RFI and started
to be CONCERNED
about the EFFECT ON THEY'RE SELLING IMAGE and PROFIT.
Instead of looking to the real problem RFI causes, no,
PRO'S TRY to HIDE REALITY.
1. Instead of "analyzing" the RFI problem
2. Instead of "submitting my affirmations to they're product
manufacturers" for eventual support.
NO, pro's wanted to "handle" it themselves, they're way by attempting
to block my posts...
They behave like "low educated, low knowledge level electricians".
They RAISE SMOKE CURTAINS and more in an attempt to generate
uncertainty and fear in order to put my statements in doubt, they have
only selling arguments, business and financial interests obliges.
Pro's have "NO MANUFACTURER SUPPORT".
Pro's are convinced about RFI problem inherent to "all" wireless alarm
systems OLD and NEW but they just don't like to admit it.
They have recommended and sold SO MANY of them in the past..
Pro's with they're irresponsible attitude disgust me.
Of course everybody knows that the technical "knowledge pre-requisite"
to be an authorized alarm dealer/installer is almost nothing,
- a little bit basics in electricity,
- low in electronics and
- zero in radio communication.
Paul
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in