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Thread: Can advise on what device gives this form of signal?

  1. #1

    Default Can advise on what device gives this form of signal?

    Hi I am new to Wi-SPY and Chanalyzer Pro. I have some issue with current office wlan and I am using WI-SPY and Chanalyzer Pro to help to gather information and how to resolve it. I have montior for 1 day and I see some strange signal. Would appreciate if someone can shade some light on this signal? strange.jpg and kolairoom.wsx

    I have another set of strange signal label as blackburn.jpg and blackburn.wsx

    Appreaciate for all the help.

    thanks
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  2. Default

    The pattern in blackburn.wsx looks like a wireless audio system.

    The pattern in kolairoom.wsx is your typical ERP-OFDM modulation. Wi-Fi will use this pattern when there is a large amount of data needing to be transferred. This will occur in either 802.11g/n capable Wi-Fi deployments. To recreate this, try performing a speed test with your laptop.

    I recommend separating the channels you use to 1 and 11 so there will be less overlap interference.

  3. #3

    Default

    Hi Trent

    thanks for the advise. You mention for the Kolairoom.wsx it was due to OFDM. Attach is another file capture on the same area. CHannel 3 (I have move out channel 11 as advise). YOu can see its like OFDM but there seem to have 3 blue inverted wave in it? Is that also from OFDM? Actually what triggers the OFDM, I see it happen very frequent and it affect the wireless throughput.
    Please advise.
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