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Thread: unusual Pattern in chanalizer 5

  1. #1

    Default unusual Pattern in chanalizer 5

    Hi,

    During a spectrum analysis for a client, an unusual pattern was detected. Unable to determine what could be the cause. No machinery or any other device is running in the area. Any ideas? (screenshot attached). Thanks.

    Patrick
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2

    Default

    Hey Patrick,

    Thanks for the screenshot. Can you get us some high-resolution screenshots of the whole application, or even better, a .WSX recording?
    Joel, Mobility+, ECSE, CWNE #233
    Technical Trainer
    MetaGeek

  3. #3

    Default unusual Pattern in chanalizer 5

    Hi Joel,

    This is the best I can do. Hope it helps. Thanks.

    Patrick
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  4. #4

    Default

    Thanks for the screenshot! I see curve shapes center on channels 1, 3, and 11. Each one of those curve shapes is an 802.11b network, or an 802.11 g/n network talking at B rates (which is pretty common, most management overhead is sent at B rates). Each one of the shapes is blue, which means they are only talking about 10 percent of the time - normal for Wi-Fi management overhead.

    Looks like a pretty clean environment, other than the network on channel 3, which ruins things for channels 1 and 6.

    If you'd like to see some more common signatures, you can find them here.
    Joel, Mobility+, ECSE, CWNE #233
    Technical Trainer
    MetaGeek

  5. #5

    Default

    Thanks for the update joel.

  6. #6
    Join Date
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    Default Unknown 5Ghz spectrum shape

    Hi Joel,

    Last night I decided to randomly scan my home environment and noticed a 5Ghz shape that does not look common. I was wondering if you can help identify this. Please see shared screenshots and .wsx file. Thanks!

    Click image for larger version. 

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  7. #7

    Default

    Quote Originally Posted by nbackus08 View Post
    Hi Joel,

    Last night I decided to randomly scan my home environment and noticed a 5Ghz shape that does not look common. I was wondering if you can help identify this. Please see shared screenshots and .wsx file. Thanks!

    Click image for larger version. 

Name:	UnKnown 5Ghz.PNG 
Views:	31 
Size:	360.5 KB 
ID:	1144
    That's a bit "rougher" of a shape than usual, but it does have the look of an OFDM (802.11a), HT-OFDM (802.11n), or VHT-OFDM (802.11ac) signature. The top just isn't as flat as usual, but it's the right width. Wi-Fi signatures do vary quite a bit, my guess is that it's due to different transmitters just being different transmitters.

    I hope that helps, thanks!
    Joel, Mobility+, ECSE, CWNE #233
    Technical Trainer
    MetaGeek

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