Careful! That channelization map only shows the CENTER frequency of the direct-sequence spread-spectrum "channel" you're using. I believe Mr. Reese is incorrect in his statement that channels 7 and 8 are in the ham band.
Each "channel" overlaps the "channels" around it -- they're wide. (Our old pal Nyquist's pesky theorem might point out that there's not enough bandwidth between from say, 2417 to 2427 to do a 11Mb/s data stream on Channel 3, and that's assuming you would run right up against channels 2 and 4. But, I sure as hell can't do the math without having had any coffee yet today!) The access points just deal with the interference they cause each other. When you're laying them out for use in an office building, you pick patterns that use 1, 6 and 11 to keep all the AP's out of each other's hair. Channels 1, 6, and 11 are the only "channels" that don't overlap each other in the U.S., so channel 1 extends up through Channel 3 (and below channel 1 down to just above 2400 MHz), and Channel 6 extends downward to Channel 4 and upward to channel 8. So the highest usable "channel" if you want to operate as a Part 97 station is Channel 6 if I didn't screw up my math. Or the top portion of your signal will be out of the ham allocation. ;-) I got a kick out of the 24XX "GHz" label too... that's pretty high! (GRIN) Nate WY0X JOHN MACKEY wrote: >It should be noted, also, that the channels are overlapping on each other. >The only channel setup that would NOT be overlaping it using channels 1,6, & >11. > >There are also channels 12, 13, & 14 but they are not authorized in the US. > >------ Original Message ------ >Received: Wed, 08 Dec 2004 07:24:15 PM CST >From: "Richard D. Reese" <[EMAIL PROTECTED]> >To: <Repeater-Builder@yahoogroups.com> >Subject: Re: [Repeater-Builder] Re: 802.11b wireless > > > >>There are 11 channels used as the standard for 802.11b/g. >> >>They are: >> >>Chan 1 2412 GHz >>Chan 2 2417 GHz >>Chan 3 2422 GHz >>Chan 4 2427 GHz >>Chan 5 2432 GHz >>Chan 6 2437 GHz >>Chan 7 2442 GHz >>Chan 8 2447 GHz >>Chan 9 2452 GHz >>Chan 10 2457 GHz >>Chan 11 2462 GHz >> >>Channels 1 through 8 fall in the Amateur band of 2390 to 2450 GHz. >> >>73 >> >>Richard D. Reese >>http://www.wa8dbw.ifip.com >>----- Original Message ----- >>From: "Tedd Doda" <[EMAIL PROTECTED]> >>To: <Repeater-Builder@yahoogroups.com> >>Sent: Wednesday, December 08, 2004 7:54 PM >>Subject: Re: [Repeater-Builder] Re: 802.11b wireless >> >> >> >> >>>On Wed, 08 Dec 2004 18:26:21 -0500, Kevin Custer wrote: >>> >>> >>> >>>>however feel free to discuss the >>>>technical nature of the subject in any detail here. >>>> >>>> >>>Hi Kevin: >>> >>>A bunch of us were thinking about setting up a Ham >>>radio only network here near Kitchener. Can you give >>>any details on the "reprogramming" of the hardware? >>> >>>Does this have to be done by the manufacturer or can >>>it be done by the user. Please recommend any hardware >>>that can be made to work. >>> >>>Thanks, >>> >>> >>> >>>Tedd Doda, VE3TJD >>> >>> >> >> >> >> >>Yahoo! Groups Links >> >> >> >> >> >> >> >> >> >> > > > > > > > > >Yahoo! Groups Links > > > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
