On Thursday 02 June 2011 22:46:53 Manuel Mendez wrote: > We are developing a product that uses a board similar to the DLink > DWA-160. Uh, there are at least two DWA-160 AR9170 revision and mysteriously users have reported strange problems with both?! So, my question: why not base your product on ath9k_htc instead? > We are sticking an amplifier before the usb radios. I am pumping > beacons at say -80dBm from a siggen and a program reading the > radiotap header prints them out. > > I am seeing ~20dBm gain which looks right, when taking into account my > PA and the one that looks to be on the actual USB cards. > > Is there a way to use the pre-gain values for noise floor calculations, > and reporting of signal strength? probably not, in fact the whole noise floor and signal strength calculations are not as straight forward as you might think?! http://www.mail-archive.com/ath9k-devel@xxxxxxxxxxxxxxx/msg05777.html http://www.spinics.net/lists/linux-wireless/msg50060.html [there's more, just ask google about ath9k and noise] Also, since you are adding an extra amplifier: Are you thinking about long-range links? Because you'll need to tinker with the round trip time MAC registers then. Regards, Chr -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
