37. Can you listen on the wireless alarm frequencies?

37. Can you listen on the wireless alarm frequencies?
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37. Can you listen on the wireless alarm frequencies? -pull 06-19-2005
Posted by on June 19, 2005, 5:49 pm
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Do you have a receiver who capture the wireless alarm frequencies and
did you pay attention to the numerous transmitters who generate
"permanent" transmissions on those frequencies?

For example (only a very small sample):
Listen to you car key transmission who operate on 434 MHz and see if
it is a "burst" or a permanent transmission..
Very informative..
Most car keys have permanent transmission when you keep the button
stroked and by consequence disturb wireless alarm systems.
Do your wireless alarm system detect it? No of course, it would give
numerous false alarms.



Posted by Roger on June 19, 2005, 4:50 pm
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> Listen to you car key transmission who operate on 434 MHz and see if
> it is a "burst" or a permanent transmission..
There are bands that require strict occupancy rules. Equipment can only be
sold in countries that use those frequencies that abide by the standards.
These standards exist for that reason. 868MHz is one such band that has
strict usage rules. Any equipment using the band CANNOT transmit on that
band for more than 1% of the time. This allows upto 100 other pieces of
equipment in the immediate vicinity to use the same band. There are several
wireless alarms using this band at the moment and they have superb RFI
detection and jamming signal algorithms.




Posted by Jim Rojas on June 20, 2005, 2:05 am
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After 4 years of endless dribble, we can safely say that Paul's brain is
still not immune to RFI. It's time to take the headphones off Paul. Maybe
one of us "PROS" can send you a tin foil lined hat to block all the unwanted
RFI.

Yes Paul, there is a life beyond RFI...

Jim Rojas


>
> Do you have a receiver who capture the wireless alarm frequencies and
> did you pay attention to the numerous transmitters who generate
> "permanent" transmissions on those frequencies?
>
> For example (only a very small sample):
> Listen to you car key transmission who operate on 434 MHz and see if
> it is a "burst" or a permanent transmission..
> Very informative..
> Most car keys have permanent transmission when you keep the button
> stroked and by consequence disturb wireless alarm systems.
> Do your wireless alarm system detect it? No of course, it would give
> numerous false alarms.
>




Posted by Robert E. Wijnberg on October 22, 2005, 5:43 pm
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-pull@shoot wrote:
> Do you have a receiver who capture the wireless alarm frequencies and
> did you pay attention to the numerous transmitters who generate
> "permanent" transmissions on those frequencies?
>
> For example (only a very small sample):
> Listen to you car key transmission who operate on 434 MHz and see if
> it is a "burst" or a permanent transmission..
> Very informative..
> Most car keys have permanent transmission when you keep the button
> stroked and by consequence disturb wireless alarm systems.
> Do your wireless alarm system detect it? No of course, it would give
> numerous false alarms.

GET A LIFE IDIOT
--
Robert.




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