[ath9k-devel] Low speeds when AP is very close to stations.

[Ben Greear <greearb@candelatech.com>]

On 03/07/2012 05:00 PM, Adrian Chadd wrote:
> On 7 March 2012 13:17, Ben Greear<greearb@candelatech.com>  wrote:
>> I put two ath9k (AR9300) nics in one machine, with
>> 6 antenna poking out, and had one NIC be the AP
>> for the other.
>
> How far apart are there?

Well, here's a picture:

http://www.candelatech.com/images/systems/lf0310-back-lo-72dpi.jpg

3 antenna on that pci faceplate are to NIC A, and the right
antenna and ones connected to the case are to NIC B.

>> It works, but I'm seeing lots of CRC errors and station-to-station throughput
>> is only about 5Mbps (one sending to the other).
>
>
>> I tried setting xmit power lower (to 4, for instance), but that
>> doesn't change the behaviour much.
>
> Well, that's still going to be quite powerful. Can you try setting it to 1 or 2?

Sure, will do that tomorrow.

> I wonder what RX attenuation setting(s) are being used. An RSSI of ~22
> is quite strong. It doesn't -seem- strong enough to cause big issues
> though.

How do I figure this out?

> Hm, what about setting tx/rx chainmask to 1 on both sides?

I'm not sure how to do this either..will poke around tomorrow.

Thanks,
Ben


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com