it's better for you to set 4 guarding zones for your 4 doors. because
the wireless door alarm has a certain distance for transmit, it's about
3m to 5m. if the distance over 5m, it would have a low effective for
testing.
Re: question about what defines an alarm "zone" ... the wireless door alarm has a certain distance for transmit,... what kind of wannabe system are we talking about? ... (alt.security.alarms)
Re: question about what defines an alarm "zone" ... Sounds like one of Paulie's Belgium systems.... |> the wireless door alarm has a certain distance for transmit,... (alt.security.alarms)
Re: How much is Alice worth to Bob? ... he is saying that Alice can transmit the appropriate 7-bit element ... The point of using this code is that _every_ 7 bit vector is a distance... of at most 3 away from one of the 16 codewords.... (sci.crypt)
Re: slight subject change DC AC transmission lines? ... over distance.... It was pretty easy to see that with no moving parts, you could get much better insulation in a transformer, and thus transmit power at kilovolt levels with existing technology in the late 1890's. ... So, if the entire system ran on 120 V DC, then you had large currents flowing all through the system, and got pretty big voltage drops in just a couple city blocks. ... (rec.crafts.metalworking)
Re: Path Loss over distance... ... You're correct that the gain would increase the distance.... Your transmit power, 20 dB, is an error. ... You're correct that the fade margin is included in the Friis ... I hope my previous comment about dBm will help you. ... (sci.electronics.misc)
