Date: Thu, 15 Feb 2007 21:07:27 -0800 From: Sam Leffler <sam@errno.com> To: Larry Martin <Larry@syatech.com> Cc: freebsd-current@freebsd.org Subject: Re: CFT: newath hal Message-ID: <45D53C0F.6080405@errno.com> In-Reply-To: <200702152251.l1FMp2L8008014@syatech.com> References: <200702152251.l1FMp2L8008014@syatech.com>
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Larry Martin wrote: > I'm trying to work with 11g/5MHz channels and tried the new 0.9.30.7 > ath_hal, but found that channel 33 for example still resulted in a 20MHz > wide channel as seen on a spectrum analyzer. The 11a/5MHz PSB channels > (82 for example) are 5MHz wide as expected. > > I'm using a Wistron CM9 card (Atheros 5212?) and expected that I'd still > see the 5MHz output, just still in the 2.4GHz band instead of 900MHz. > Is this correct? No. What you are doing is not supported. There is only support for SR9 cards and for operating "5212 cards" in the public safety band. > > One additional note: I'm transmitting packets via the BPF packet > injection code, which works very well for my purposes. I don't think > this should affect the channel bandwidth. I've tried specifying > transmit data rates of both 1.5 and 6.0 Mb/s. Interestingly, at 1.5 > Mb/s the receiver shows that the receive data rate is 1.5 Mb/s, but the > actual throughput is ~3 Mb/s (which maybe sorta almost makes sense if > it's still transmitting on a 20MHz channel?) I hope to capture the > transmissions on a third radio with tcpdump to see what's really > happening there. Maybe that will provide additional insight into the 5 > vs 20MHz issue. > > awn2# sysctl dev.ath.0.countrycode=843 > dev.ath.0.countrycode: 0 -> 843 > > awn2# ifconfig ath0 list chan > Channel 3 : 907* Mhz 11g/5Mhz Channel 23 : 917* Mhz 11g/5Mhz > Channel 4 : 907* Mhz 11g/10Mhz Channel 24 : 917* Mhz 11g/10Mhz > Channel 13 : 912* Mhz 11g/5Mhz Channel 26 : 917* Mhz 11g > Channel 14 : 912* Mhz 11g/10Mhz Channel 33 : 922* Mhz 11g/5Mhz > Channel 16 : 912* Mhz 11g Channel 34 : 922* Mhz 11g/10Mhz > > awn2# sysctl hw.ath > hw.ath.hal.version: 0.9.30.7 > hw.ath.hal.dma_brt: 2 > hw.ath.hal.sw_brt: 10 > hw.ath.hal.swba_backoff: 0 > hw.ath.dwell: 200 > hw.ath.calibrate: 30 > hw.ath.outdoor: 1 > hw.ath.xchanmode: 1 > hw.ath.countrycode: 0 > hw.ath.regdomain: 0 > hw.ath.rxbuf: 40 > hw.ath.txbuf: 100 > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > >
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