From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nm35-vm5.bullet.mail.bf1.yahoo.com ([72.30.238.77]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZyjfY-0004bf-2C for ath10k@lists.infradead.org; Tue, 17 Nov 2015 17:03:53 +0000 Date: Tue, 17 Nov 2015 17:02:58 +0000 (UTC) From: Joerg Pommnitz Message-ID: <403673121.6466400.1447779779000.JavaMail.yahoo@mail.yahoo.com> In-Reply-To: <564B5004.7070103@candelatech.com> References: <564B5004.7070103@candelatech.com> Subject: Re: TX-Power limits for ath10k based card on Linux 3.18.24 (long term support)? MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Joerg Pommnitz Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Ben Greear , "ath10k@lists.infradead.org" Ben, thanks for taking the time to answer. I followed your suggestion and repeated my tests with your beta-15 firmware. The results are interesting. At first I thought nothing had changed. The txpower was about 10dB, far short of the expected 20dB. Playing around with "iw dev ap set txpower fixed ... " did not result in significiant changes. However, when I add an attenuator between the powermeter and the antenna, the measured txpower markedly increased. With 10dB attenuation I get 12dB, with 20dB attenuation the txpower increases to more than 15dB. Question: Is this the expected behaviour? Can I force a fixed txpower instead of this dynamic adaptation? -- Regards Joerg > Ben Greear schrieb am 17:04 Dienstag, 17.November 2015: > > You might try CT firmware...I fixed some issues with tx-power for single chain > rates. > > http://www.candelatech.com/ath10k.php > > I suggest version 'beta-15', it is about to be officile release-15. > > I'm curious to know the results if you do test with it. > > Thanks, > Ben > > > > On 11/17/2015 02:19 AM, Joerg Pommnitz wrote: >> Hello all, >> I'm trying to use a COMPEX WLE600VX (see > http://www.compex.com.sg:809/Datasheets/WLE600VX_Dsv1.0.2-141013-I.pdf) as an > Access Point. According to the data sheet, the card should be able to transmit > with about 20 dB (100mW). However, doing some measurements with a card on 2.4GHz > channel 3 in 802.11g 54MBit coding I could only observe a TX power of about > 7..9dB. During the measurement the card was under full load with iperf > transmitting at 20..25 mbps. This is only a fraction of the stated TX power, so > something strange must be going on. The measurements were done with a Marconi > 6460 powermeter. >> >> >> My hostapd.conf is very simple: >> interface=ap >> driver=nl80211 >> ssid2= >> channel=3 >> hw_mode=g >> auth_algs=1 >> ignore_broadcast_ssid=0 >> eap_server=0 >> wpa=3 >> wpa_passphrase= >> wpa_key_mgmt=WPA-PSK WPA-PSK-SHA256 >> wpa_pairwise=TKIP CCMP >> ctrl_interface=/var/run/hostapd >> macaddr_acl=0 >> >> The regdb (compiled directly into the kernel) shouldn't be a problem > either: >> global >> country 00: DFS-UNSET >> (2402 - 2472 @ 40), (N/A, 100), (N/A) >> (2457 - 2482 @ 40), (N/A, 100), (N/A) >> (2474 - 2494 @ 20), (N/A, 20), (N/A), NO-OFDM, PASSIVE-SCAN >> (5170 - 5250 @ 80), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN >> (5250 - 5330 @ 80), (N/A, 20), (0 ms), DFS, AUTO-BW, PASSIVE-SCAN >> (5490 - 5730 @ 160), (N/A, 20), (0 ms), DFS, PASSIVE-SCAN >> (5735 - 5835 @ 80), (N/A, 20), (N/A), PASSIVE-SCAN >> (57240 - 63720 @ 2160), (N/A, 0), (N/A) >> >> Does anybody have an idea, why the TX power seems to be so very low? >> >> >> -- Regards Joerg >> >> _______________________________________________ >> ath10k mailing list >> ath10k@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/ath10k >> > > -- > Ben Greear > Candela Technologies Inc http://www.candelatech.com > _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k