Wireshark · Wireshark-users: Re: [Wireshark-users] R: R: Ipw3945 monitor mode

[Joerg Mayer <jmayer@xxxxxxxxx>]

On Fri, Oct 26, 2007 at 05:36:22PM +0200, Massimo Palmeri wrote:
> This could be ok, but I think that the receiver could lose some frames from
> my channel when scanning for other channels. Anyway I would like to record
> (almost) all the frames generated on a given channel. I have to discover how
> to force the ipw driver to stop scanning and listen to a single channel.

Ah, ok there seems to be some misunderstanding here: It doesn't scan.
But when we talk about channels we are actually talking about the
center frequency of a signal that ranges from 12.5 Mhz below that
center frequency to 12.5 MHz above that center frequency. As each
channel only has a width of 5 MHz, that means the wireless signal
of each channel covers 5 channels, the selected one plus the two
adjacent upper plus the two adjacent lower channels. So if you set
your channel to 9, then you will see stuff from channels 7-11.

Hth.

 Ciao
       Joerg

-- 
Joerg Mayer                                           <jmayer@xxxxxxxxx>
We are stuck with technology when what we really want is just stuff that
works. Some say that should read Microsoft instead of technology.