OT: Bad Performance with Senao NL-2511CD ?

Doug Yeager doug at aircomwireless.net
Wed Jan 8 08:01:29 EST 2003


I have this card and I am using it w/ an 32 slot omni-directional
antenna.
I was using the wmp11.  I can notice an improvement over that card
definitely.

I did notice that only one of the jacks worked at all for tx.  Only the
primary jack transmits.  I thought something was messed up bad and then
I just switched the jack it was plugged into and I did an iwconfig and
watched the driver adjust the tx power.  That was really cool.  It
climbed up to 20db and then stopped. 

I then took my laptop w/ a crappy pcmcia antenna and drove in my car up
to about 1/4 miles away and was able to surf the web...that was pretty
cool.  Line of site is important though.  I'll try the yagi antenna next
week when I get it.  Fun geeky stuff! :)

-doug

-----Original Message-----
From: hostap-admin at shmoo.com [mailto:hostap-admin at shmoo.com] On Behalf
Of Martin Polak
Sent: Wednesday, January 08, 2003 2:41 AM
To: alexd
Cc: hostap at shmoo.com
Subject: Re: OT: Bad Performance with Senao NL-2511CD ?

alexd wrote:
> On Tue, 2003-01-07 at 17:28, Martin Polak wrote:
> 
> 
>>the new card is now attached to the same antenna as the old card
before.
>>And instead of getting better performance from the 23dbm card, I get 
>>less SNR and weaker connections than from the old 15dbm card. I even 
>>tried to pull-up txpower, using iwconfig but nothing would help.
>>The card inits fine, using STA 1.4.9 and even loads 1.5.6 perfectly.
> 
> 
> Do you *know* for a fact that the Senao card has more output power?
> Don't just rely on the manufacturers data. Have you tested both cards
> with equipment in a lab? [I'm guessing not]. Perhaps you should do a
> little research into the Senao card and see what other WLAN
enthusiasts
> are saying about it. 

Right, lacking this lab equipment, i couldn't do this tests.But my sense

of logic tells me, that I card stated to have more than 6 times the 
output power and according to a chart found in the web (dont remeber the

link)a better rf sensitivity, it should at least perform equal to the 
old one, shouldn't it.


> Try swapping the card
> with a different example of the same model. 
I think i always did this.


> Well it's probably not you ;-) Have you checked the electrical
polarity
> of the RF connector? Maybe it is idiosyncratic?
> 

> Every coupling causes losses. And remember, if you change more than
one
> variable at once, It Ain't Scientific ;-)

Yes I know, but remeber the thing about 'lacking the right equipment'
:-) ?

Thanks for your thoughts anyway!

Martin




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