On Thu, 19 May 2005 00:20:04 -0400, "Morgans"
wrote:


"George Patterson" wrote

That's not very expandable. If the system gets popular, you'd need lots of
frequencies; otherwise your alarm might fail to sound when your item is
stolen
because someone else close by is on the same frequency.

Nah, yah gotta think digital. It has to be chirping your digital code, not
just frequencies.

And when you get two on the same frequency is it possible for one to
swamp the other. If you use something like WiFi to set off an alarm,
or call home, that's different as the networking *should* take care of
collissions and multiple systems can coexist on the same frequency.


Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com