Below are the pics of various Netstumbler sessions using
the different antennas. No APs were associated or IP addresses
requested. Actually when using Linkferret with any of the antennas, the PC
card's NDIS driver goes into a special promiscuous mode
so no IP connectivity is allowed. So, when using Linkferret I can "SNIFF"
the air and see all the packets without associating or
obtaining an IP address. The same applies when I hook any of the antennas to
the WSP100 via an SMA pigtail, since the
WSP100/Neutrino is a completely passive
receiving device I am not violating any laws. Also, when using a standard
Orinoco card in normal mode but turn IP off I can run any protocol analyzer
software and sniff the channel I am on. In this case I
can associate to the AP, but no IP info will been requested. Again these
examples prove that at the minimum you should turn on WEP
and turn off SSID broadcasting. One other thing noted is that some
folks do turn off their APs during the day. Sometimes, depending
on the time of day I will see more APs than at other times. Still, the ones
who had their APs turned off, when on, did not enable WEP.
So, in retrospect how does the saying go? "All your
bandwidth belongs to us" or is it "All your APs belong to us"?
Please pardon the sizes of the pics and the scrolling.
In this shot I am using the 24dBi Mag grid with no amp
and just rotating the antenna across the rooftops. Below is what I picked
up.
I cut off the MAC address listing to protect the innocent and myself.

Here is a pic of the SNR of one of the APs. Notice the rise
in signal over noise? This was achieved while rotating the antenna to find
the
optimal SNR for that AP. Its like aiming a missile launcher, I love it!!!!

In this pic I am using the same antenna but with the 1
watt AMP added to the RF circuit.. As you can see I picked up additional
APs with the amp. I wonder how close some of those channel 6 APs are to one
another to warrant any co-channel interference.
Do these people see each other as well? At least one fella was smart to turn
on WEP and close his system.

This pic is from the same stumble session as above but I
selected one of the found APs. Noticed the increased signal as I rotate into
range but also notice the increased level of the noise floor from the amp as
compared to the previous non amp pics highlighting the
same AP.

Now I will try the same tests as listed earlier but with the 15dBi Yagi.
I basically get the same results using a different antenna.
However, the extra beamwidth did not pick up any additional APs, for now
that is. At other times I was able to pick up additional
APs using the 15dBi Yagi due to its beamwidth. I guess some folks turn
off their APs when not in use. Not a bad practice.

Here is the SNR of one of the selected APs listed above using the Yagi.

Now I will try the Yagi with the 1 watt amp added to the circuit. Notice
how I did not find as many AP this time around using the
Yagi with the amp as apposed to the Mag grid directional. Maybe it was my
"rotor" skills:))))

Here is the SNR of one of the APs that was highlighted here several times
in the previous pic, but this time using the Yagi.
Again, notice the noise floor and the increase in signal once I rotated the
antenna for optimal range.

Hoped you enjoyed the show...