Re: remote interference in a wireless security system

[simpleNhumble@xxxxxxxxx]

Dear Roland,

thanks once again for your precious time... i got the burst
principle....  is there any other approach to this...other than burst
.=2E the only other one i can think of is a base station which sends
alarm if the frequency channel is bocked continously for more than say
5 mins...

even rolling codes may not work... if the channel itself is blocked...
such that PIR radio signals donts reach the base station...  what say
you?

bye
SNH

Roland wrote:
> Your question might go beyond most wireless application questions and be =
one
> more for an electrical engineer with RF experience.
> Here is a site that describes their products relating to your question. H=
ope
> this helps.
> http://www.inovonics.com/whatToLookFor.php#question2
>
> In many commercial environments, ambient RF signals or signals from other
> wireless devices can interfere with a wireless security systems ability to
> operate effectively. But since Inovonics Wireless products are based on
> spread spectrum technology, reliability and range are maximized even in
> "noisy" environments. Inovonics Wireless is the only wireless security
> system based on proven Frequency Agile=AE 900 MHz technology. By sending
> completely redundant signals on a multitude of channels across a 10 MHz
> band, Inovonics Wireless products maximize reliability.
> <simpleNhumble@xxxxxxxxx> wrote in message
> news:1165936343.408520.86730@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > Dear Roland and Frank,
> >
> > thanks for your valuable comments - for propriety sake i dont want to
> > mention brand name on this forum - but your valuable point is taken.
> >
> > For my understanding could you throw some light on burst transmission
> > devices and serial
> > number based systems and how they deal with and report RF jam
> >
> > thanks
> > SNH
> >
> >
> > Roland Moore wrote:
> >> I have only seen this on much old dip switch programmed units. Most
> >> serial
> >> number based systems today can deal with or report RF JAM.
> >> <simpleNhumble@xxxxxxxxx> wrote in message
> >> news:1165929419.290184.75650@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> >> > friends,
> >> >
> >> > we purchased a new DIY wireless home security system - and saw this
> >> > scary problem.... please do tell me if this is there with other lead=
ing
> >> > products too...
> >> >
> >> > once the remotes/key fobs are programeed... and the system is armed.=
.=2E
> >> > if i take an another unprogrammed remote/key fob... and then keep it
> >> > pressed continously... in effect jamming the signal frequency...the
> >> > base station doesnt catch the radio signals emitted by the P I R and
> >> > door s ens ors... in effect i can walk in to the system.. without
> >> > getting an alarm...
> >> >
> >> > is this the problem with some type of manufacturers or happens with =
all
> >> > products - for the products which handle this properly - how do they=
 do
> >> > it... which could be some place where i can get such products...
> >> >
> >> > thanks
> >> > SNH
> >> >
> >