Re: [ath9k-devel] Disabling the third antenna for AR9380 in ath9k
From: Mohammed Shafi <hidden>
Date: 2011-06-21 08:55:42
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On Tue, Jun 21, 2011 at 2:07 AM, Fred Matthews [off-list ref] wrote:
Hi all, I am installing the AR9380 NIC on laptops, but some only have two UFL connectors, and thus I was wondering if using only two of the UFL antenna ports will have any negative effect or difference than installing a 2x2 NIC (AR9280 for example which has only 2 ports anyway). Please kindly explain with references if possible. Also for example is there anyway to disable transmission on the third UFL port (antenna) from ath9k or otherwise. Thank you all very much
you can change the tx/rx chainmask for 3x3 AR9380 to disable transmission on the third antenna cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > tx_chainmask cd /sys/kernel/debug/ieee80211/phy0/ath9k# echo 0x3 > rx_chainmask after this, ideally it should operate as 2x2 device as per Susinders comments. but if you got AR9280 please try to use that if 2 antenna is the constraint.
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-- shafi