On Thu, 13 Sep 2007 05:24:23 +0100, " Peter"
wrote:

|What you have to remember is that other FM users have much
|more bandwidth to play with than CB users. The broadcast
|stations have shed-loads of bandwidth to play with.
|
|-------------------

Actually they don't have loads of bandwidth to play with. In most
cases 15KHz is the highest frequency respone that they can have
without exceeding the peak diviation with Stereo FM. About 10% of the
modulating power is reserved for the 19KHz pilot carrier for stereo
FM. Commercial FM broadcast stations need the bandwidth for
transmitting higher fidelity music. Here in the US they are limited to
75KHz peak deviation. Besides tranmitting stereo music with FM is far
more complex than that of voice with FM.


james