How are we supposed to read 5GHz WiFi signal strength bands?

Discussion in 'Wireless Internet' started by ceg, Aug 23, 2015.

  1. ceg

    ceg Guest

    I ran a WiFi survey using "Wifi Analyzer" freeware on my Android phone in
    a college-dorm atmosphere earlier today (after installing Windows 10),
    and I think I completely understand the 2.4GHz wifi signal-strength
    chart; but I totally fail to gather any useful information out of the
    5GHz signal-strength chart (specifically what band to set the 5GHz wifi
    adapter to).

    http://i.imgur.com/JS4BDiy.jpg

    The 2.4GHz chart is at the left; while the 5GHz chart is to the right.
    Can you help me interpret what I'm seeing in the 5GHz chart?

    I can't make any sense of the 5GHz chart (for example, what band to use?).
    Can you?
     
    ceg, Aug 23, 2015
    #1
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  2. ceg

    micky Guest

    In alt.home.repair, on Sun, 23 Aug 2015 05:45:56 +0000 (UTC), ceg
    It's awfully pretty.
    I think it means "LIfe is empty and the only true solace is in
    technology."
    No. But it's awfully purty. Maybe a museum would want to display it
     
    micky, Aug 23, 2015
    #2
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  3. ceg

    micky Guest

    In alt.home.repair, on Sun, 23 Aug 2015 05:45:56 +0000 (UTC), ceg
    A strange thing. The image above displayed just fine at first and for
    at least a couple minutes, and I went and did something else, but later
    when I looked at the tab, it was all black. When I reloaded, I got the
    message.
    "The image http://i.imgur.com/JS4BDiy.jpg cannot be dsplayed because
    it contains errors". I checked the spelling.

    You didn't change the image in the 15 minutes preceding the current
    time, did you?

    When I clicked on the link above just now, got the same black screen
    with one line error message at the top, as above.
     
    micky, Aug 23, 2015
    #3
  4. ceg

    micky Guest

    In alt.home.repair, on Sun, 23 Aug 2015 06:33:36 -0400, micky
    Tried again just now, 14 minutes later, and it worked just fine. Maybe
    because I had closed the two tabs with error messages?
     
    micky, Aug 23, 2015
    #4
  5. ceg

    N_Cook Guest

    It got misdirected from a disco gobo.
     
    N_Cook, Aug 23, 2015
    #5
  6. CEG,

    Puzzling that your graph or chart on the right does not have a labelled
    "x" axis. What is it showing? If it is meant to be like the chart on the
    left then that suggests that you do not have anything but noise at 5 gHz.
    Looks like a lot of noise.

    Dave M.
     
    David L. Martel, Aug 23, 2015
    #6
  7. ceg

    Lee Guest

    You could start by choosing the same graph format for both images and
    then actually choosing the 5Ghz one for the one on the right (hint no 5G
    displayed)
     
    Lee, Aug 23, 2015
    #7
  8. ceg

    Char Jackson Guest

    While viewing the 2.4GHz chart, tap the screen once. You'll see a freq band
    indicator over on the left, near the -db scale. If you do nothing, the freq
    indicator times out and disappears again, but if you tap it while it's
    visible, the screen switches to the 5GHz band.

    What you're calling the 5GHz chart is really just another view of the 2.4GHz
    chart. You *swiped* to get there. You need to tap.
     
    Char Jackson, Aug 23, 2015
    #8
  9. "David L. Martel" wrote in message
    CEG,

    Puzzling that your graph or chart on the right does not have a labelled
    "x" axis. What is it showing? If it is meant to be like the chart on the
    left then that suggests that you do not have anything but noise at 5 gHz.
    Looks like a lot of noise.

    Dave M.


    Carefully.
    LOL
     
    The Burke, col ret, Aug 23, 2015
    #9
  10. No, it's not. We've been through this before. If your smartphone
    supports 5GHz wi-fi, Wi-Fi Analyzer will produce a square box, near
    the upper left hand corner of the screen, just below the "W" in "WiFi
    Analyzer" with either 2.4G or 5G inside the box. The problem is that
    the box disappears. Tap that area and the box will magically appear.
    Tap it again to toggle modes. Also, if you're looking at 5G and no
    SSID's are showing, the program will magically switch back to 2.4G.

    The mess you were looking at on the right is the signal strength
    versus time graphs. Too bad the author of WiFi Analyzer didn't bother
    adding page titles.

    You're not done yet. I've noticed that several "smart" devices, such
    as cheapo cell phone and tabloids, that are allegedly dual band, turn
    off the unused band when connected to an access point. The result is
    that WiFi Analyzer pretends that there's no 5G in the device.
    Disconnecting from your access point should solve that problem.

    Also, there's something wrong with your Comcast connection. Your
    download speed is fine, but you should be getting about 12 Mbits/sec
    upstream. At least that's what I've been seeing at various customers.
    Winner of the highest residential speed award so far was about 160/30
    in Felton with a Comcast Cisco DPC3939:
    <http://mydeviceinfo.comcast.net/device.php?devid=357>
    There's suitable conspiracy here, but I promised not to tell.


    Leak of the week (which means you didn't read this here): Comcast
    Business class will also get a boost in speed on Thurs, Aug 27. Reboot
    your modems in order to see the improvement. I pried this out of a
    Comcast installer last week. If it doesn't happen on time, I'll claim
    that this was a forgery and that I never said it.
     
    Jeff Liebermann, Aug 23, 2015
    #10
  11. ceg

    Ant Guest

    Does that app exist for iOS? I didn't see it.


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    and which ant dies. You shall battle to the death, and the winner will
    be given his freedom. Why are you looking at me like that?" --Peter;
    "Peter, would you like a glass of...? Oh, my God! I told you not to play
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    ( ) Chop ANT from its address if e-mailing privately.
    Ant is currently not listening to any songs on this computer.
     
    Ant, Aug 24, 2015
    #11
  12. Nope. Apple has decided that you should not be allowed to install
    wi-fi sniffer, monitor, and troubleshooting applications on Apple
    handsets. Apple knows what is best for you. This is typical:
    <http://www.adriangranados.com/blog/where-did-wifi-analyzer-go>
    Limitations like this is why I gave up on IOS long ago.

    Of course, that's why people jailbreak their iPhones. Try the Cydia
    store on your jailbroken iThing:
    <https://cydia.saurik.com>
    Firing up my ancient iPhone 3G (jailbroken), I find
    - yFyLite Network Finder
    and nothing else. There might be something newer. I just ran Cydia
    to see if there's anything new, and it's furiously updating packages
    and indexes. Yawn... Argh, this thing is slow. How could I ever have
    used it? The Cydia listing shows a huge list of WiFi related
    utilities. A few are similar to WiFi Analyzer. The others are
    connection managers and password managers. Most are useless tweaks
    changing the stock signal stength icon to something more interesting.
    One I recall from long ago is WiFiFoFum with its goofy radar like
    display.

    Of course, if you have a laptop, Apple allows Wi-Fi monitoring for
    OS/X:
    <https://itunes.apple.com/us/app/wifi-explorer/id494803304?mt=12>
    <https://itunes.apple.com/us/app/wifi-signal/id525912054?mt=12>
    Any semblance to hypocrisy is hopefully coincidental.
     
    Jeff Liebermann, Aug 24, 2015
    #12
  13. ceg

    ceg Guest

    Works for me.
    http://i.imgur.com/JS4BDiy.jpg

    Anyway, I can't make any sense out of the 5GHz graph, so, I was hoping
    someone who knew what it means would chime in.
     
    ceg, Aug 25, 2015
    #13
  14. ceg

    ceg Guest

    None that I know of.
    The app is the freeware "WiFi Analyzer".

    At home, with only a handful of 5GHz WiFi signals, the chart is
    easy to read, and you are correct, the graphs are color coded
    to the access points (ESSIDs) in the boxes at the top, and the
    upper squiggles are of greater signal strength.
     
    ceg, Aug 25, 2015
    #14
  15. ceg

    ceg Guest

    BTW, why do so many people use HOME as the prefix to their
    SSID's?
     
    ceg, Aug 25, 2015
    #15
  16. ceg

    ceg Guest

    At home, I can see better what is going on.

    The 5GHz graph from Wifi Analyzer freeware has signal strength on the
    Y axis (-30dBm at the top line, then -40dBm, -50dBm, -60dBm, -70dBm,
    -80dBm, and -90dBm on the first line above the x axis, where the
    y intercept must be at -100dBm Signal Strength.

    The X axis isn't labeled, but it must just be time since I can watch
    the graphs grow from one side to the other in about two minutes time.
     
    ceg, Aug 25, 2015
    #16
  17. ceg

    ceg Guest

    I don't think you get any option to choose anything, least of all the
    graph format.
     
    ceg, Aug 25, 2015
    #17
  18. ceg

    ceg Guest

    Oooooooooooooh. I *did* swipe to see what I was calling the 5GHz chart!
    (How did you know?)

    I see now, that it's the *same* chart, only over time instead of over
    frequency! (slaps head ... duh) It was just frequency versus time for
    the x axis between the two charts. (embarrassed).

    I see I have 5 options for viewing that 2.4GHz chart:
    1. Channel graph
    2. Time graph
    3. Channel rating
    4. AP list
    5. Signal meter

    If I *tap* at the top left (near the top of the y axis), then I see a
    box with "2G" and "5G" alternatively, as I tap that box.

    Geeeeeeez. I feel stoooopid.
     
    ceg, Aug 25, 2015
    #18
  19. ceg

    ceg Guest

    I only just now realized that what you are saying it totally correct!
    I was wrong. I misinterpreted what I was seeing.
    And that's why it confused me.
    Now I see that, since I have far fewer access points at home.
    When I tap the top left, I do get a 5G and a 2G box, alternating with
    each other. So, WiFi Analyzer does seem to see both.
    That's interesting. It's the kid's Comcast setup. I'm at home now, so,
    I can't test it. But they get about 90 down on 5GHz and about 5 or 6 up.

    On 2.4GHz, they get only about 30 down and about 5 or 6 up.

    The "service", as I recall, is nominally 45 down and 5 up.
    So, should they really be getting double the upload speeds?

    Should we complain to Comcast since it's at least 5Gbps?
    I wonder what "Business Class" is. Are these kids in Business Class?
    It's an apartment building with a lot of kids in it (all from the
    school) but it's an off-campus building.
     
    ceg, Aug 25, 2015
    #19
  20. ceg

    Tony Hwang Guest

    Maybe because it is home network? Mine is homewireless and cascadehome.
     
    Tony Hwang, Aug 26, 2015
    #20
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