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Thread: Is this radar ?

  1. #1

    Default Is this radar ?

    First time poster here (and thank you for all the other posts to everyone - all good information).

    I have seen quite a lot of strange different things in the wireless spectrums, but this one is a "headscratcher" for me.

    There seems to be several small (small bandwidth) signals present.
    Just below the center channel of 36, above channel 64 and about one at the start and end of channel 52. (and two faint ones above 36 and almost just center of 48).

    If you set the utilization sensitivity at -95 dbm it is very easy to spot the ones below 36 and the ones above 64.

    But the question is .. what could these signals be ?
    Are these radar signals ? - The reason I ask is that the customers APs are doing excessive DFS on channels 52 to 64.


    (PS: I have now moved several km away from the customer's site, in a hotel in the same town, and it appears that the signal is still there - do I have a spectrum analyzer hardware failure ?)

    Any suggestions ?

    /ThomasIsThisRadar.wsx

  2. #2
    Join Date
    Feb 2012
    Location
    On the Beach in Florida
    Posts
    382

    Default

    The spikes can be aeronautical radio navigation in the non-DFS frequencies below 5250. The signals at 5250 can be for radio location. There can be other signal sources as well. What is the environment - industrial, urban, rural?

    Outside of curiosity, the DFS issue can be addressed by channel selection. In North America use non-DFS channels 149 and higher.
    Old Mod by the Sea

  3. Default

    Quote Originally Posted by ua549 View Post
    Outside of curiosity, the DFS issue can be addressed by channel selection. In North America use non-DFS channels 149 and higher.
    Tried 154 and 164 with hardly any luck.

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