Hi !

On Tue, 28 May 2002, Shyam Kumar Mangayil wrote:
> So how does the  RECEIVER understand the other frequencies (other than th=
e frequency of the carrier wave) ?

The deviation of the frequency is quite small, and the receiver knows about
some Hz around the base frequency. As i know from CB, you have a carrier of
somewhere around 27 MHz, and a frequency deviation of nom. 3 KHz, max. 5 KH=
z,
as the channels are in 10 KHz-steps. So this deviation is just a very small
fraction of the carrier frequency, and this little deviation in freqency go=
es
well through the input filters of the receiver.  It is not like in a Modem =
with
2 very different tones being switched. This is AFSK, FM works not with 2
frequencies being s=B4witched, but the analog way with a carrier of more or=
 much
more MHz and a relatively small bandwidth. Don't know the bandwidth of WLAN=
,
but i thing it is somewhere around a ratio of 800 MHz / 5 MHz or so. Maybe =
this
is shown in the specs of your cards.

=2E..Michael

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