AP performance (again): txpower regulation

[Adrian Chadd]

2011/9/8 Lev Serebryakov <lev at freebsd.org>:

> gateway# ./athpoke 0x9934 0x9938 0x993c 0xa234 0xa238
> 0x9934 = 1e1e1e1e
> 0x9938 = 1c1e1e1e
> 0x993c = 0000003f
> 0xa234 = 1e1e1e1e
> 0xa238 = 1e1e1e1e
> gateway# ifconfig wlan0 txpower 1
> gateway# ./athpoke 0x9934 0x9938 0x993c 0xa234 0xa238
> 0x9934 = 02020202
> 0x9938 = 02020202
> 0x993c = 0000003f
> 0xa234 = 02020202
> 0xa238 = 02020202
> gateway# ifconfig wlan0 txpower 30
> gateway# ./athpoke 0x9934 0x9938 0x993c 0xa234 0xa238
> 0x9934 = 24242424
> 0x9938 = 1c1e2024
> 0x993c = 0000003f
> 0xa234 = 26262426
> 0xa238 = 26262626

These look fine, but I don't have as much experience with the ar5212
series stuff as I do with the AR5416+ series stuff.

>  It seems, registers are Ok. But clients don't see any difference!
> Maybe, it is because my Senao card is "powerful" one, with additional
> schematic (and power supply) to boost signal?

Hm. Well, how far away are they? You can do a bit of math to see what
changes the TX power on the sender side would have on the receiver
signal level.
Have you ever looked at doing up a free space loss model to predict
what the signal level(s) should be?


Adrian