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Thread: Alfa comparison test: AWUS036 H vs NH

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  1. #1
    Senior Member VulpiArgenti's Avatar
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    Post Alfa comparison test: AWUS036 H vs NH

    I recently bought the newer NH version of the AWUS036, seduced by 2000w transmit power plus N-speed data transfer. I've made a pseudo-scientific comparison; same 5 dBi antenna, HD install BT5R1 32 then BT5R2 64, controlling as many variables as possible.

    Internet

    Number of APs seen in wicd: about the same

    Speed connects to router (WPA2): H much quicker

    Ping router:
    Code:
    H     100 packets transmitted, 99 received, 1% packet loss, time 99162ms
           rtt min/avg/max/mdev = 1.240/4.726/177.438/19.295 ms
    
    NH   100 packets transmitted, 100 received, 0% packet loss, time 99232ms
           rtt min/avg/max/mdev = 1.359/677.013/2927.134/612.316 ms, pipe 3
    Download speed test:
    H 286 KB/s
    NH 577


    Monitor mode/airodump


    Airodump scan: H sees 30% more APs

    Reception PWR: H much better, by an average of 10 dBm
    (Note that the value for PWR is reported by the driver, therefore may not be comparable).

    RXQ on fixed channel/AP: very variable. H reports itself as more sensitive (eg 24 vs 12) , but both seem to collect a similar number of packets.

    Injection: both excellent.

    Transmit power: Hacking the regdb/CRDA allows:

    Code:
    wlan1 (H)      IEEE 802.11bg  ESSID:off/any  
                       Mode:Managed  Access Point: Not-Associated   Tx-Power=30 dBm   
    wlan3 (NH)    IEEE 802.11bgn  ESSID:off/any  
                       Mode:Managed  Access Point: Not-Associated   Tx-Power=35 dBm !!
    I tried to test this by DOSing my AP from a distance (PWR -85). NH reported fewer ACKs (eg H [58|62 ACKs] vs NH [18|28 ACKs]), but this is probably a function of its lower sensitivity. There seemed to be no difference in the effectiveness of the deauth.
    I suspect there is no advantage in increasing transmit power at the expense of reception sensitivity.


    Soft AP


    Setup: no problems on either, airbase and dhcpd work.

    Soft AP transfer speed (for the victim):

    Driver Max kbps
    Ave KB/s
    Victim browsing experience
    H 350 45 slightly better than dialup
    NH 70 3 almost unusable
    (iwlagn 700 64 slow broadband)


    Other

    Macchanger: no problems with either.
    5GHz band: not seen by either (need AWUS051NH for this)
    Virtualbox: H stable, NH flakey


    Conclusion


    If I could have only one, it would definitely be the AWUS036H.



    P.S. If anyone has any tests they want me to run I'll do my best to oblige.
    P.P.S. Anyone want to buy my NH?

  2. #2
    Good friend of the forums zimmaro's Avatar
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    hi,
    VulpiArgenti thanks for the excellent/interesting analysis of the "comparison". (if I may say so) I had already had some doubts during this similar-thread:
    http://www.backtrack-linux.org/forum...hlight=txpower
    good job!thanks-again
    +1 36H

  3. #3
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    35 dbm is higher than 2 watts. This may explain why your card is malfunctioning (you will most likely destroy your card running it that high without modding it). No higher than 32dbms would be my recommendation and 33 dbms is just under 2 watts.

    http://www.moonblinkwifi.com/dbm_to_watt_conversion.cfm

    Try your test again (if you ran the test at 35dbm - you didn't specify the power used in the test) and if you haven't melted it yet you will see an improvement.

    Thanks for sharing your findings.
    Last edited by Scamentology; 03-17-2012 at 12:27 PM.
    "Never do anything against conscience -- even if the state demands it."
    -- Albert Einstein

  4. #4
    Senior Member VulpiArgenti's Avatar
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    Hi Scamentology
    you didn't specify the power used in the test
    I followed your tutorial, and mostly use 32dBm. Surprisingly, I haven't seen any difference between 30-35 (benefit or harm). This is the reported power; who knows what it is actually putting out?

    Why do you say my card is malfunctioning? It seems to work well, just not as sensitive as the H.

    (I am well aware of regulatory issues; this is in a lab setting)
    Last edited by VulpiArgenti; 03-17-2012 at 07:17 PM. Reason: Added question

  5. #5
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    Quote Originally Posted by VulpiArgenti View Post
    Hi Scamentology

    Why do you say my card is malfunctioning? It seems to work well, just not as sensitive as the H.
    NH
    txpower = 30
    ping
    8 packets transmitted, 8 received, 0% packet loss, time 7000ms
    rtt min/avg/max/mdev = 0.469/0.874/2.660/0.690 ms

    Speedtest.net
    3 meg connection
    2.60 Down
    .73 up

    _____________
    txpower = 32
    8 packets transmitted, 8 received, 0% packet loss, time 6997ms
    rtt min/avg/max/mdev = 0.493/0.522/0.558/0.037 ms

    Speedtest.net
    3 meg connection
    2.83 Down
    .73 up

    Both tests were done about 6 feet from the router.

    You can see how ( by comparing numbers ) I would think its malfunctioning.

    (I am well aware of regulatory issues; this is in a lab setting)
    I stated no objections to this. In fact I encourage this and appreciate the effort.

    The fact that we get such different outcomes with this card means this card is NOT stable enough to recommend, but the one I got works great.

    Quote Originally Posted by Osirium View Post
    VulpiArgenti
    NextG USB-Yagi Plug & Play 11N Long Range WiFi antenna 2200mW..this is the absolute thing that should be part of a Wifi Warrior kit
    I will be purchasing one of these tonight, Will let you know next week. Thanks for the heads up.
    Last edited by Scamentology; 03-18-2012 at 12:55 PM.
    "Never do anything against conscience -- even if the state demands it."
    -- Albert Einstein

  6. #6

    Default Re: Alfa comparison test: AWUS036 H vs NH

    VulpiArgenti ...agree almost in full with what did you say.

    However the best performance that I ever had it with wireless cards was based on this one:

    NextG USB-Yagi Plug & Play 11N Long Range WiFi antenna 2200mW..this is the absolute thing that should be part of a Wifi Warrior kit

  7. #7
    Senior Member VulpiArgenti's Avatar
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    Intriguing - I'll look into it. Thanks.

  8. #8
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    Great report, looking forward for your next analysis.

    Thanks

  9. #9
    Senior Member VulpiArgenti's Avatar
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    Thanks for posting your tests Scamentology.

    My main disappointment with the NH was 1) sensitivity, and 2) poor performance as a soft AP. It would be interesting to hear anyone's results on these.

    [Off-topic: looking forward to seeing a post on that wicked NextG]
    Last edited by VulpiArgenti; 03-19-2012 at 12:32 AM. Reason: sp

  10. #10
    Senior Member VulpiArgenti's Avatar
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    Default Re: Alfa comparison test: AWUS036 H vs NH

    download speed is the only area that the NH offers any advantage
    Agreed. Although it may well have an advantage in transmit power; I just couldn't see it in my simple tests.

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