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From: Bob on 20 Mar 2010 04:30 Since the FCC are proposing to remove the APC requirement for spread spectrum transmissions and limit the PEP to 10W is this going to create more or reduce interference on Wifi networks. <http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf> "� 97.313 Transmitter power standards. * * * * * (j) No station may transmit with a transmitter output exceeding 10 W PEP when the station is transmitting a SS emission type."
From: Jeff Liebermann on 21 Mar 2010 00:15 On Sat, 20 Mar 2010 08:30:34 +0000, Bob <bob(a)invalid.invalid> wrote: >Since the FCC are proposing to remove the APC requirement for spread >spectrum transmissions and limit the PEP to 10W is this going to create >more or reduce interference on Wifi networks. ><http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf> > >"� 97.313 Transmitter power standards. >* * * * * >(j) No station may transmit with a transmitter output exceeding 10 W PEP >when the station is transmitting a SS emission type." No change. The purpose of the NPR was to eliminate the unworkable automatic power control requirement for any spread spectrum transmissions on any band. Very few ham stations run high power on 2.4GHz. While it's theoretically possible to legally use someting that hits the 1KW power output limit, few hams do this. Hams have a mostly clear area from 2300-2400Mhz where 802.11 is not allowed. <http://www.ntia.doc.gov/osmhome/EPS/openness/appendb.html> Note that the NPR only affects spread spectrum usage, and has no effect on other modes such as CW, SSB, FM, ATV, repeaters, etc. -- # Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060 # 831-336-2558 # http://802.11junk.com jeffl(a)cruzio.com # http://www.LearnByDestroying.com AE6KS
From: Bob on 21 Mar 2010 05:31 On 21/03/2010 04:15, Jeff Liebermann wrote: > On Sat, 20 Mar 2010 08:30:34 +0000, Bob<bob(a)invalid.invalid> wrote: > >> Since the FCC are proposing to remove the APC requirement for spread >> spectrum transmissions and limit the PEP to 10W is this going to create >> more or reduce interference on Wifi networks. >> <http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf> >> >> "� 97.313 Transmitter power standards. >> * * * * * >> (j) No station may transmit with a transmitter output exceeding 10 W PEP >> when the station is transmitting a SS emission type." > > No change. The purpose of the NPR was to eliminate the unworkable > automatic power control requirement for any spread spectrum > transmissions on any band. Very few ham stations run high power on > 2.4GHz. While it's theoretically possible to legally use someting > that hits the 1KW power output limit, few hams do this. Hams have a > mostly clear area from 2300-2400Mhz where 802.11 is not allowed. But they do like to experiment High-Speed Digital Networks and Multimedia <http://web.archive.org/web/20050416130935/http://www.arrl.org/hsmm/project.html> and they do cover quite a few channels. <http://en.wikipedia.org/wiki/High-speed_multimedia_radio#Frequencies_and_channels>
From: Bob on 21 Mar 2010 07:27 On 21/03/2010 04:15, Jeff Liebermann wrote: > On Sat, 20 Mar 2010 08:30:34 +0000, Bob<bob(a)invalid.invalid> wrote: > >> Since the FCC are proposing to remove the APC requirement for spread >> spectrum transmissions and limit the PEP to 10W is this going to create >> more or reduce interference on Wifi networks. >> <http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf> >> >> "� 97.313 Transmitter power standards. >> * * * * * >> (j) No station may transmit with a transmitter output exceeding 10 W PEP >> when the station is transmitting a SS emission type." > > No change. The purpose of the NPR was to eliminate the unworkable > automatic power control requirement for any spread spectrum > transmissions on any band. The IEE802.18 Group disagreed in 2006 so will they disagree this time? <http://fjallfoss.fcc.gov/ecfs/comment/view?id=5513499721> I did have difficulty finding the relevant RM as it seems to have been duplicated with an irrelevant document. The list of respondents at that time are listed here:- <http://fjallfoss.fcc.gov/ecfs/proceeding/view?name=RM-11325> > Very few ham stations run high power on > 2.4GHz. While it's theoretically possible to legally use someting > that hits the 1KW power output limit, few hams do this. Hams have a > mostly clear area from 2300-2400Mhz where 802.11 is not allowed. > <http://www.ntia.doc.gov/osmhome/EPS/openness/appendb.html> > Note that the NPR only affects spread spectrum usage, and has no > effect on other modes such as CW, SSB, FM, ATV, repeaters, etc. >
From: D. Stussy on 22 Mar 2010 01:44
"Jeff Liebermann" <jeffl(a)cruzio.com> wrote in message news:g86bq5lfrv81ieimiqek3gv8ob02njuiue(a)4ax.com... > On Sat, 20 Mar 2010 08:30:34 +0000, Bob <bob(a)invalid.invalid> wrote: > >Since the FCC are proposing to remove the APC requirement for spread > >spectrum transmissions and limit the PEP to 10W is this going to create > >more or reduce interference on Wifi networks. > ><http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-10-38A1.pdf> > > > >"� 97.313 Transmitter power standards. > >* * * * * > >(j) No station may transmit with a transmitter output exceeding 10 W PEP > >when the station is transmitting a SS emission type." > > No change. The purpose of the NPR was to eliminate the unworkable > automatic power control requirement for any spread spectrum > transmissions on any band. Very few ham stations run high power on > 2.4GHz. While it's theoretically possible to legally use someting > that hits the 1KW power output limit, few hams do this. Hams have a > mostly clear area from 2300-2400Mhz where 802.11 is not allowed. > <http://www.ntia.doc.gov/osmhome/EPS/openness/appendb.html> > Note that the NPR only affects spread spectrum usage, and has no > effect on other modes such as CW, SSB, FM, ATV, repeaters, etc. Mostly clear? When we only have 20MHz of the 100MHz range you cited? Amateur radio does NOT have 2310-2390. |