Netgate 200mW card and hostap for power modification
vkaul at research.telcordia.com
Tue Jan 3 16:52:29 EST 2006
I recently purchased a Netgate NL-2511CD PLUS EXT2
Long Range Wireless Card after reading it to have a 200 mW capability on
The link took me to this Prism2.5 based card
which does point to hostap for linux support
Now, when I used
iwpriv wlan0 writemif 62 128
to configure HFA3861_CR_MANUAL_TX_POWER register (CR31) to its highest
value (=128), I expected to get a confirmation of the configuration by
iwconfig to show 23.1 dBm (=200 mW)
But it never goes above 100 mW (=20 dBm)
Additionally, the received power at a 'receiver' running iwspy to the card
is about 25 dB weaker than a Linksys WCF12 CompactFlash using hostap and
same commands to control power
Has anyone encountered these problems ?
1. Are there some studies on the correlation between CR31 (=Manual Tx
Power Control) and CR58 (Measured Tx Power). Under what confitions, if any
are they the same.
2. Is it possible that this is a firmware issue ? Is there a way to query
the firmware to check the limits on power ?
Thanks in advance
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