#508: Setting TXpower Issues
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Reporter: [EMAIL PROTECTED] | Owner: dyqith
Type: defect | Status: assigned
Priority: major | Milestone: version 0.9.x - progressive
release candidate phase
Component: madwifi: driver | Version: trunk
Resolution: | Keywords:
Patch_attached: 1 |
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Comment (by [EMAIL PROTECTED]):
== Engenius EMP-8602 400mw power issues ==
First off, the dmesg stuff . . .
{{{
ath_hal: 0.9.17.2 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
wlan: 0.8.4.2 (0.9.2)
ath_rate_sample: 1.2 (0.9.2)
ath_pci: 0.9.4.5 (0.9.2)
wifi0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
wifi0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
wifi0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps
24Mbps 36Mbps 48Mbps 54Mbps
wifi0: H/W encryption support: WEP AES AES_CCM TKIP
wifi0: mac 10.4 phy 6.1 radio 6.3
wifi0: Use hw queue 1 for WME_AC_BE traffic
wifi0: Use hw queue 0 for WME_AC_BK traffic
wifi0: Use hw queue 2 for WME_AC_VI traffic
wifi0: Use hw queue 3 for WME_AC_VO traffic
wifi0: Use hw queue 8 for CAB traffic
wifi0: Use hw queue 9 for beacons
wifi0: Atheros 5212: mem=0x80000000, irq=12
}}}
The Problem:
'''From the AP''' note the RSSI or S/N:
{{{
ADDR AID CHAN RATE RSSI DBM IDLE TXSEQ RXSEQ CAPS ACAPS
ERP STATE MODE
00:02:6f:3e:1c:e5 1 2 6M 17 -78 135 2371 23408 EPSs
0 23 Normal WME ATH
}}}
But the Station hears the AP much better . . .
{{{
[netstation]/var/log<30>wlanconfig ath0 list
ADDR AID CHAN RATE RSSI DBM IDLE TXSEQ RXSEQ CAPS ACAPS
ERP STATE MODE
00:0b:85:13:f7:70 1 2 1M 25 -70 0 1490 20352 EPSs F
3 43 Normal WME ATH
}}}
'''AP''' :: So I can jack the power to 19 and the '''AP''' RSSI S/N
Numbers go WAY up
{{{
ADDR AID CHAN RATE RSSI DBM IDLE TXSEQ RXSEQ CAPS ACAPS
ERP STATE MODE
00:02:6f:3e:1c:e5 1 2 6M 22 -73 120 2790 31200 EPSs
0 23 Normal WME ATH
}}}
But it won't '''STAY''' The number continually floats back down to 15
after 20 seconds or so and the RSSI number drop accordingly along with
thruput && bit-rate
{{{
[netstation]/var/log<36>iwconfig ath0 txpower 19 && iwconfig ath0
ath0 IEEE 802.11g ESSID:"CF-North"
Mode:Managed Frequency:2.417 GHz Access Point:
00:0B:85:13:F7:70
Bit Rate:1 Mb/s Tx-Power=19 dBm Sensitivity=0/3
Retry:off RTS thr:off Fragment thr:off
Encryption key:FEED-DEAF-DEAD-BEEF-6026-3510-07 Security
mode:restricted
Power Management:off
Link Quality=25/94 Signal level=-70 dBm Noise level=-95 dBm
Rx invalid nwid:162 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[netstation]/var/log<37>ping ksmith.com
PING ksmith.com (66.226.231.194) 56(84) bytes of data.
64 bytes from ksmith.com (66.226.231.194): icmp_seq=1 ttl=63 time=44.3 ms
64 bytes from ksmith.com (66.226.231.194): icmp_seq=2 ttl=63 time=10.1 ms
64 bytes from ksmith.com (66.226.231.194): icmp_seq=3 ttl=63 time=10.0 ms
64 bytes from ksmith.com (66.226.231.194): icmp_seq=4 ttl=63 time=10.3 ms
--- ksmith.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3034ms
rtt min/avg/max/mdev = 10.085/18.727/44.331/14.782 ms
[netstation]/var/log<38>iwconfig ath0
ath0 IEEE 802.11g ESSID:"CF-North"
Mode:Managed Frequency:2.417 GHz Access Point:
00:0B:85:13:F7:70
Bit Rate:1 Mb/s Tx-Power=15 dBm Sensitivity=0/3
Retry:off RTS thr:off Fragment thr:off
Encryption key:FEED-DEAF-DEAD-BEEF-6026-3510-07 Security
mode:restricted
Power Management:off
Link Quality=25/94 Signal level=-70 dBm Noise level=-95 dBm
Rx invalid nwid:175 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
}}}
This is driving me crazy. This is an outdoor PTP link with patch and
sector antenna's. There is a CM-9 on the AP with a 250mw outdoor
amplifier. The 400mw card should be knocking the doors down. I have
another CM-9 as a client on the same AP with no stomache upset, generally
sits in the 6 or 11 MB range.
What is causing the downward float? I think it may be a b/g switching
issue. I think possibly the power is getting lowered during the switch
and won't com back up? But that shouldn't matter,
Any ideas?
--
Ticket URL: <http://madwifi.org/ticket/508>
MadWifi <http://madwifi.org/>
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