Results 1 to 7 of 7

Thread: InSSIDer - convert signal power value in mW

  1. #1

    Default InSSIDer - convert signal power value in mW

    Hi everybody.
    I was wondering if there is a way to calculate the power of the signal received in Inssider using the Amplitude value. I think the dbm can't just be converted into mW (the value I'd like to obtain), because they are negative and I suppose the power grows while the amplitude value tends to 0....

    Thanks

  2. #2

    Default

    Hey anywhere88,

    You actually can convert dBm into mW directly. I think that this might help you out...

    mW = 10^(dBm/10)

    40 dBm 10.00 watts
    36 dBm 4.00 watts { Maximum ERP allowed by FCC in U.S.
    30 dBm 1.00 watts
    27 dBm 500 milliwatts
    26 dBm 400 milliwatts
    25 dBm 320 milliwatts
    24 dBm 250 milliwatts
    23 dBm 200 milliwatts { Typical output from WLAN devices at 915MHz
    22 dBm 160 milliwatts
    21 dBm 130 milliwatts
    20 dBm 100 milliwatts { Maximum ERP allowed by E.T.S.I. In Europe
    15 dBm 32 milliwatts
    10 dBm 10 milliwatts
    5 dBm 3.2 milliwatts
    4 dBm 2.5 milliwatts
    3 dBm 2.0 milliwatts
    2 dBm 1.6 milliwatts
    1 dBm 1.3 milliwatts
    0 dBm 1.0 milliwatts
    -1 dBm 0.79 milliwatts
    -5 dBm 0.32 milliwatts
    -10 dBm 0.1 milliwatts
    -20 dBm 0.01 milliwatts
    -30 dBm 0.001 milliwatts
    -40 dBm 0.0001 milliwatts
    -50 dBm 0.00001 milliwatts
    -60 dBm 0.000001 milliwatts
    -70 dBm 0.0000001 milliwatts
    -80 dBm 0.00000001 milliwatts



    Regards,
    Stephen
    Last edited by Stephen; 03-13-2012 at 02:09 PM.

  3. #3

    Default

    Hey Stephen,

    That's very interesting - Thanks

    cheers

  4. #4

    Default

    Hi Stephen, sorry for my late reply.
    Yes that was what I was looking for, and it reminds me I have to study the log tables again eheh
    Wow I thought the signal power was some mW and not just a small fraction of it. Very useful, thanks!

  5. #5

  6. #6

    Default

    I'd read the long explaination you wrote, and I've read dozens of articles trying to visualize this in my head and I hadn't been able to comprehend it with all the differences in frequency algorythms, channel width, etc.

  7. #7

    Default

    Thanks for the nice information in the post...
    Last edited by clark5901; 01-29-2013 at 04:07 AM.

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •