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On 5.3.2010 23:43 Bob Copeland wrote:
quoted text
> If you have access to the kind of R&S analyzer used here, please share :)
> http://bugzilla.kernel.org/show_bug.cgi?id=3D14566
I think this happens because the card switches output connectors (miniPCI=20
cards have two antenna connectors). We had this problem even in FreeBSD and=
=20
had to set a fixed TX antenna.

I hit this too when I did the measurement and had the pigtail connected to =
the=20
wrong connector. There is currently no TX antenna setting in Ath5k, so I ha=
d=20
to hardcode it in the call to ath5k_hw_set_antenna_mode().

Before I did that, the output power was really aproximately 20 dB lower.=20
Unfortunately I didn't write the value down, but I think it was -13 dBm=20
instead of 11 dBm.

I don't understand yet why the hardware chooses to swap antennas from time =
to=20
time. Maybe it in fact works OK in normal situation, but it gets confused=20
when it's hooked to a spectrum analyzer and didn't receive any packets.

8AN

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