Re: 11. Pro's "THINK", yes they do but is it reasonable?

[-pull@shoot]

On Sat, 07 May 2005 01:32:15 +0200, -pull@shoot wrote:

>
>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