Electronics

Guest

Some low level pro's "think" there is nothing wrong with they're
wireless alarm system installation... for years... experience... NO
WARNING and in theyre mind RFI is detected.

Are they're systems still operational or just dead?

When a Radio Frequency Interference (RFI) occurs, the system is no
longer able to detected FIRE and/or INTRUSION, worse, and THE OWNER
DOESN'T KNOW IT!!!!! The system is just "DEAD" and very quite.

When i used a commercial available certified wireless radio headphone
(sold all around in several places by thousands) it muzzled my
wireless alarm system, it was "DEAF" for incoming signals (ID
included) and "DEAD" on warning, that simple, that easy.
NOTE:
Its not typical to that wireless headphone, ANY transmitter
operating on the wireless alarm frequency will do.

Many other devices operate on the LPD (SRD) frequency simultaneously
with the Wireless Alarm Systems, the frequency is "SHARED" and "NOT
LAW PROTECTED" (FCC or similar) against Radio Frequency Interference
(RFI)".

Some 900 MHz wireless alarm systems (only a few) have sensor
transmission monitoring, this is intended to detect sensor
malfunctions, obstacles or conductive objects displaced (a car
displaced a few inches for instance) and located in the RF propagation
paths who may inhibit reception of the signals emanating from the
sensors. When it causes a data communication loss, it warns "after
hours".
No reason to warn that your car has jeopardized the alarm sensor
connection immediately, next day the car will be in another
position...
Some installers remove this feature in order to avoid "false alarms"
(and they don't tell it to you).
I have been told that this monitoring "may" detect RFI after hours of
a "permanent" disturbing transmissions too???

Pro's have NO test equipment, besides they're wet finger fake, to
confirm that RFI is detected, they're past experience of no alarm is
enough to proof reliability..

All that makes PRO's THINK there is nothing wrong with "they're"
installed wireless alarm systems.. They have sold / installed so
many..

For years CS stations have not detected any RFI (20+ years) they
claim..
But maybe you live in a transmitter free clean country not indicated
on a map?

Maybe the day your wireless alarm system was installed there was no
disturbing transmission in the vicinity, but, the day there is RFI one
and those so-called pro's imaginative RFI detection circuit exist..
When there are several wireless alarm systems with sensor signal
monitoring on in the vicinity... police... suburb nightmares.. let the
show goes on when several systems are installed in you vicinity..

In the mean time feel happy you have a quite system maybe still in
good operational conditions:

NO WARNING isn't that a good sign of reliability???
Go on and think your installed system is in good shape; think.

I had a quite system for at least one year due to RFI, nice isn't it?

Paul

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