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Miscellaneous notes relating to Wi-Spy (need link)
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Sample Screens
For some reason, I think of old school sonar displays when I see the Wi-Spy in action (at least with the Spectromap display). Here's some of my captures...
Baseline
This first one is a shot of the background environment at my house. I've turned off all of the obvious stuff but you can still see my neighbor's network (the "light noise" between channels 10 and 13) and an odd narrow source (between channels 8 and 9).
802.11g
The red, yellow, green and orange dots are generated by my own access point, running in 802.11g mode on channel 6. I should probably note that this is without any client associated with the AP.
Bluetooth
The following is a shot of interference caused by a number (at least 3) cell phones' Bluetooth signals. The signals are spread out because Bluetooth uses channel hopping across 79 channels (in the U.S.). The ghosting at the high end is caused by a number of other devices at TCC.
Interference - Grandtec AVW-1000
The following is a shot of the interference caused by my Grandtec AVW-1000 video sender equipment, generated by clicking through all four channels on the sender. Obviously there's a serious problem with channel 1 of the device.
CM 840T Camera
Not sure of the manufacturer, friend says he got it at Walmart. (They can also be bought in bulk from China, supposedly.) The camera (pic below) has night-vision capability and, like the Grandtec, a four channel capability. The channel in the pic below is channel 2.
Note that, like most cheap 2.4GHz (i.e., unlicensed band) equipment, it has noticeable noise either side of the channel.
Manual Scanning
The following is a shot of the signals generated by my repeatedly hitting "iwlist eth1 scanning". I'm not sure that there's any value to it but it does display that there's something there other than background noise.
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