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Old October 30th 03, 06:55 PM
Hans K0HB
 
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(Len Over 21) wrote

In article ,
(Hans K0HB) writes:

Since a
cell phone transmits a signal even when not placing a call, they can
require that the unit be turned off at all times while on the
premises.


It does?


Yes, Lenover, it does.

Oh, yes, the receiver's Local Oscillator "transmits" a
picayune picoWatt or so...


And much more than the picayunish oscillator leakage you allude to (if
the receiver is even so crude as to have an actual Local
Oscillator)......

As soon as a cell phone is powered up it immediately establishes radio
communications with the MTSO over the control channel, comparing
SID's, negotiating a registration request, and other similar
housekeeping chores. This radio communications occurs even if you
never actually place an outgoing call or recieve an incoming call.

Sunuvagun!

With all kind wishes,

de Hans, K0HB
--
http://home.earthlink.net/~k0hb