On Wed, Nov 29, 2006 at 12:00:49PM +0100, Florian Fainelli wrote: > Le mercredi 29 novembre 2006 07:54, Larry Finger a écrit : > > When using the standard bcm43xx-softmac software and transmitting with CCK > > modulation at 11 Mbs, I get TX power at my receiver of -36 dBm. When > > transmitting with OFDM modulation at 54 Mbs, the maximum power in exactly > > the same configuration is -48 dBm. Thus the signal is weaker by a factor of > > 10^12. That is too weak for reliable communication to my AP, which is about > > twice as far as the RF receiver. > > As far as I know, power is in Watt or mW, what you are pointing out is a > power > level, ok this is the . I don't really understand your 10^12 factor ? > 10log(10^12) (basis 10) = 120 ?
dBm is an accepted way to measure power in radio systems. See http://en.wikipedia.org/wiki/DBm . The difference between -36 and -48 dBm is 12, which is roughly a 16 fold decrease. Erik -- +-- Erik Mouw -- www.harddisk-recovery.com -- +31 70 370 12 90 -- | Lab address: Delftechpark 26, 2628 XH, Delft, The Netherlands _______________________________________________ Bcm43xx-dev mailing list Bcm43xx-dev@lists.berlios.de https://lists.berlios.de/mailman/listinfo/bcm43xx-dev
