Also what is a "Senao 2511 access point"? Is it some machine running hostap with a 2511 card inside, or Senao's "SL2511 AP Pro Plus" or perhaps a "SL2611 AP3 Plus",or something else?
Any chance your pigtail is messed-up? Also, with a 14dBi antenna, the signal could be coming from far off your property. What happens if you use an antenna with less gain? Jim Dustin Moore writes: > I'm testing out my Senao 2511 ext2 card against a Senao 2511 > access point and I think there's something odd going on with > the "interference" level. I use WLan expert to probe the card and it > typically reads an interference level of -56 dBm or so, which is about > the same strength as the signal of my AP. In fact, no matter where I go > on my property it seems like the interference level is pretty high. > (The antenna on the card is a 14 dB Hyperlink range extender). > > I also see that the link quality is significantly below the signal > strength, even for line of sight over about a 200 foot distance. With a > signal strength of -56 dB read by WLan the Senao signal strength meter > reads Good yet the link quality is rated as poor (30% to 50%). > > It really seems as if the card is experiencing heavy interference. I > doing my testing on a farm where I'm reasonably sure there are no > continuous microwave sources for some distance. I have a 2.4 Ghz PC and I > shut that off yielding no change in perceived interference level. > > The only think I can't discount is the laptop I have the Senao card in. > It's an old Compaq 266 Mhz job. I don't know what could be operating in > the laptop that would get up to 2 Ghz. > > I was wondering if anyone on the list knew what was a "normal" reading > for interference on a 2511 card is or if what I'm observing makes any > sense to anyone. > > On the bright side, the signal level I read off of WLan expert agrees with > my link budget calculations within about 5 dB. At least the raw power is > all there. I have the feeling that unless I resolve this intererence > problem I'm not going to get near the -84 dBm sensitivity. Connection to > the access point seemed to fail somewhere around -65 dBm. > > Anyhow have any knowledge of the _practical_ minimum sensitivity for a > Senao card is running at 1 mbps? > > > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- "Speed, it seems to me, provides the one genuinely modern pleasure." -- Aldous Huxley (1894 - 1963) -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
