AR9280: ar5416PerCalibrationN: NF calibration didn't finish; delaying CCA

Lev Serebryakov lev at
Thu Oct 27 09:03:31 UTC 2011

Hello, Adrian.
You wrote 27 октября 2011 г., 6:42:01:

>>  I've got pigtails from China at least (55 days of waiting, I love
>> Russian Post), and trying my new WiFi card:
> :-)
  It is crazy world: you could buy Mini-PCI / Mini-PCIe cards locally.
With MMCX or U.FL connectors. You could by antennas -- RP-SMA, N-type,
any. All of this you could buy locally, in city's computer stores. Not
in everyone, but there are several big ones, which have such parts.  And
NO ONE sell pigtails! AT ALL! Personnel doesn't understand, what I'm
asking about. One very special place offers custom-made cables -- any
connectors, any length, but for short U.FL <-> RP-SMA cable they ask
$30 (USD). For one. Ooops.

>> ath0: <Atheros 9280> mem 0xa0060000-0xa006ffff irq 15 at device 17.0 on pci0
>> ath0: [HT] enabling HT modes
>> ath0: [HT] 2 RX streams; 2 TX streams
>> ath0: AR9280 mac 128.2 RF5133 phy 13.0
>>  Now I'm trying it in 802.11g mode, as here is no 802.11n clients.
>>  System is:
>> FreeBSD 9.0-RC1 FreeBSD 9.0-RC1 #0: Tue Oct 18 04:44:52 MSK 2011
>>  802.11g and signal strength seems to be same as with AR5413 based
>> card, but here are error on start:
> Ok. Is that good or bad?
   I'm not sure :) It means, that my previous card is not broken (it
 is good), but it means too, that my environment is very noisy (it is
 bad) :)

>> ar5416PerCalibrationN: NF calibration didn't finish; delaying CCA
> Ignore that. It's fine.

>>  Is it worth trying 802.11n without 802.11n clients?
> You can certainly flip it on. Just make sure you do this:
> ifconfig wlan0 -ampdutx
  It seems, that this setting is not shown in "ifconfig" output.

  And what about channels? All these HT/20 and HT/40 -- what is best?

> .. as only A-MPDU RX is currently supported in -HEAD.
> (I have a branch in subversion which implements A-MPDU TX, but it's
> still very beta work. :)
  Yes, I'm tracking your progress ny your e-mails :) Thank you for
your work!

// Black Lion AKA Lev Serebryakov <lev at>

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