Maximum Transmit Power for channel 36 ,40,44 and 48

[Adrian Chadd]

hiya,

sure, but the NIC also has calibration tables for the maximum power
it's been calibrated at for each channel. This includes per-channel
targets and band-edge targets.

Unfortunately :( ath10k doesn't easily expose the NIC regulatory / CTL
entries in a useful fashion. That would sure be nice.



-adrian


On 20 March 2017 at 20:59, KAVITA MATHUR <kavitam at cdot.in> wrote:
>
> Hi,
>
> But I got 13 dBm for 20 MHz channel(HT20), mcs 7. And I got 18dBm for 40 MHz
> channel(HT40), mcs 15. In both cases, I have set channel 36.
>
> If I change channel 36 to 149, I always get 20dBm for all the modes(legacy,HT-20 and HT-40).
>
> I am using country IN in my hostapd configuration file, which gives following limitation:
>
> country IN: DFS-JP
>         (2402 - 2482 @ 40), (20)
>         (5170 - 5250 @ 80), (20), AUTO-BW
>         (5250 - 5330 @ 80), (20), DFS, AUTO-BW
>         (5735 - 5835 @ 80), (20)
> Can I change the calibration data? How can it be done?
>
> Thanks & Regards,
> KAvita
>
> On Mon, 20 Mar 2017 11:45:16 +0100, Sebastian Gottschall wrote
>> Am 20.03.2017 um 09:25 schrieb KAVITA MATHUR:
>> > Hi,
>> >
>> > Chipset : AR9220
>> > RF module : WLM200NX and WLM200N5
>> > Linux Kernel : 3.12
>> > ath9k driver : backport4.4.2-1
>> >
>> > With above combination , I have measured maximum transmit power 13 dBm for channel
>> > 36,40,44 and 48. While it is 20 dBm for channel 149 and other 5GHz band channels
>> >   as well as for 2.4 GHz channels.
>> >
>> > If I try to set txpower using iwconfig wlan0 txpower 20 , it gives no error.but it shows
>> > only 13dBM.
>> >
>> > How I can change the txpower for channel 36,40,44 and 48?
>> the maximum availale txpower depends on the calibration data which is
>> stored within the cards owm eeprom and is also related to the current
>> used mcs set / wireless rate.
>> as higher the rate is as lower the transmission power will be
>> according to the datasheet the rate for ht40 5 ghz for this card is 14
>> dbm at MCS 7 / 15 with a tollerance of +- 2 dbm
>>
>> https://www.pcengines.ch/pdf/wlm200n5-23.pdf
>>
>> Sebastian
>>
>> > Please help me on this.
>> >
>> > Thanks & Regards,
>> > कविता माथुर Kavita Mathur
>> > वरिष्ठ अनुसंधान अभियंता  Senior Research Engineer
>> > सी-डॉट                      C-DOT
>> > इलैक्ट्रॉनिक्स सिटी फेज़ I         Electronics City Phase I
>> > होसूर रोड, बेंगलूरु               Hosur Road, Bengaluru – 560100
>> > फोन  Ph 080-28529896
>> > Disclaimer:
>> > ----------
>> > This email and any files transmitted with it
>> >
>> >
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>>
>> --
>> Mit freundlichen Grüssen / Regards
>>
>> Sebastian Gottschall / CTO
>>
>> NewMedia-NET GmbH - DD-WRT
>> Firmensitz:  Berliner Ring 101, 64625 Bensheim
>> Registergericht: Amtsgericht Darmstadt, HRB 25473
>> Geschäftsführer: Peter Steinhäuser, Christian Scheele
>> http://www.dd-wrt.com
>> email: s.gottschall at dd-wrt.com
>> Tel.: +496251-582650 / Fax: +496251-5826565
>
>
> Thanks & Regards,
> कविता माथुर Kavita Mathur
> वरिष्ठ अनुसंधान अभियंता  Senior Research Engineer
> सी-डॉट                      C-DOT
> इलैक्ट्रॉनिक्स सिटी फेज़ I         Electronics City Phase I
> होसूर रोड, बेंगलूरु               Hosur Road, Bengaluru – 560100
> फोन  Ph 080-28529896
> Disclaimer:
> ----------
> This email and any files transmitted with it
>
>
> _______________________________________________
> ath10k mailing list
> ath10k at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/ath10k