Hello,

I'd like to ask you something about wifi.

When I do that:

root@OpenWrt:~# iwconfig eth1

It gives me that:

root@OpenWrt:~# iwconfig eth1
eth1      IEEE 802.11-DS  ESSID:"TeilWifi"
          Mode:Master  Frequency:2.462 GHz  Access Point: xxxxxxxxxxxxxxxxxx
          Tx-Power:19 dBm
.......................................................................

And I have also that:

root@OpenWrt:~# wl txpwr1
TxPower is 127 qdbm,  31.75 dbm, 255 mW  Override is Off

and that:

root@OpenWrt:~# wl pwr_percent
pwr_percent is 100(0x64)

So I don't understand if my wifi power is 19 dBm or 31.75 dbm?
dbm and dBm is the same unit?

And the command wl pwr_percent seems indicate that I'm using the whole power of the wifi of the WRT54GS.

What do you think of that?

Thanks :-)

Bye.

afaik wl has always misreported power as at max. Search the forums.

- DL

Ok but the diffent results with iwconfig eth1 and wl txpwr1.

Why it's not the same number?

How can I be sure, that I use all the power of the wifi of my router?

I have that also:

root@OpenWrt:~# wl txpwrlimit
Current TX Power Limit:          255 mW ( 31.75 dBm)

Thanks.

Bye

(Last edited by thierry_b on 15 Mar 2006, 03:34)

the radio IC is followed by a linear amplifier (33 dB amplification; 21 dBm max output) and by send/receive and ant1/ant2 switches (0.4 dB insertion loss each).
Power settings are register settings of the radio chip; the real output power does not get measured. The choice of components limits output power to about 20 dBm in g mode.
While from a certain point the radio chip may still feed a bit more signal to the amp and the software reports this, the amp will saturate, so in reality not much more power comes out.