I have a EnGenius EMP-8602+ MiniPCI card. Which is using Atheros AR5413A chipset and has 400mw High-Power ability.

When I install the EMP-8602+ and boot with Backtrack 2.0 CD. The txpower information seems too much higher than the card.


bt ~ # lspci -nv
02.05.0 0201. 168c:001b (rev 01) ; This is the EMP-8602+
Subsystem. 168c:2063
Flags. bus master, medium devsel, latency 168, IRQ 9
Memory at feae0000 (32-bit, non-prefetchable) [size=64K]
Capabilities. [44] Power Management version 2
bt ~ # iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

wifi0 no wireless extensions.

ath0 IEEE 802.11a ESSID:"Linksys" Nickname:""
Mode:Managed Channel:11 Access Point: 00:0D:3B:FE:F9:CF
Bit Rate.36 Mb/s Tx-Power.31 dBm Sensitivity=0/3
Retry.off RTS thr.off Fragment thr.off
Encryption key.off
Power Management.off
Link Quality=3/94 Signal level=-63 dBm Noise level=-96 dBm
Rx invalid nwid.3316 Rx invalid crypt.0 Rx invalid frag.0
Tx excessive retries.0 Invalid misc.0 Missed beacon.0

bt ~ # iwlist ath0 txpower
ath0 8 available transmit-powers :
0 dBm (1 mW)
7 dBm (5 mW)
11 dBm (12 mW)
15 dBm (31 mW)
19 dBm (79 mW)
23 dBm (199 mW)
27 dBm (501 mW)
31 dBm (1258 mW)
Current Tx-Power:31 dBm (1258 mW)



And from the spectrum anylizer the card true txpower is under 20dBm.

I think this is the madwifi txpower bugs, and where can I get the Backtrack's madwifi source code to verify the bug?

Or, Can somebody give me the help?

Thanx a lot!