Wireless Boosters?

[Tyler van Houwelingen]

If you can do it w/o amps, definately better.   I am mainly speaking from a metro WiFi perspective (ala blanket your town putting APs on the light poles).  We could not make this application work w/ just antennas alone and we tried many configurations.    I am all for keepin the noise as low as is necessary, especially in the increasingly cluttered 2.4ghz band.

ty
  ----- Original Message ----- 
  From: Faisal Rahman 
  To: SeattleWireless Talk List 
  Sent: Thursday, May 18, 2006 1:23 PM
  Subject: Re: Wireless Boosters?


  We'll I cant totaly agree with Tyler here. Its best if he doesnt have to use any amps. Amps will not increase his SNR as it would also amplify his RX noise also moreover they would insert noise into both his TX/RX detoriating his SNR. Best way would be to use high gain antenna to achieve the desired EIRP. 

  Required Antenna gain = 36 - TX power of AP + Cable Attenuation + Insertion loss

  Use amps only when you cant find your Antenna with the required gain.

  And yes diversity would help your system. If you have an option of doing to it - I suggest you implement it. 

  Faisal

  ps. I think Matt is not looking for advise on design but is looking for vendors who sells amp in the original mail. Try looking into www.lucix.com, they can produce custom amps. 


  On 5/18/06, Tyler van Houwelingen <tyler at azulstar.com> wrote:
    Most of the amps at hyperlinktech.com are bidirectional, meaning they will
    improve the Tx power, as well the Rx sensitivity of your APs.  (Rx
    Sensitivity is one if not the most important factors for success on your 
    APs.)  We have found the best combination is to copy Tropos - use a 1W
    (bidirectional) amp with a 6-8dB omni on the APs (depending on losses) to
    achieve 36EIRP.  They actually use 2 amps and 2 radios to achieve diversity, 
    which helps the Rx sensitivity even more, but that runs up the bill of
    materials pretty fast.

    hope this helps, ty

    Tyler van Houwelingen
    Founder and CEO
    Azulstar Networks, Inc.
    1051 Jackson, Grand Haven, MI 49417 
    1117 Rio Rancho Blvd 13, Rio Rancho, NM 87124
    1-877-AZULSTAR
    www.azulstar.com


    ----- Original Message -----
    From: "gary" < lists at lazygranch.com>
    To: <my.lists at gomelby.com>; "SeattleWireless Talk List"
    <talk at seattlewireless.net >
    Sent: Wednesday, May 17, 2006 12:59 PM
    Subject: Re: Wireless Boosters?


    > I'm not entirely sure I understand the question, but large amounts of
    > asymmetry in a two-way communications system isn't very useful. That is, 
    > if the client is at 30mw and you are blasting 2W, the client will need to
    > be so close to to your site for the system to operate [for the WAP to
    > "hear" the signal] that you might as well have stayed at lower power. [Now 
    > point to point directional symmetric power levels are a different story.]
    >
    > Note that if you use better antennas versus more power, you truly increase
    > the range since the better antenna on the WAP will help to receive the 
    > client. Repeaters also are a symmetric way to increase range.
    >
    >
    >
    > Matt M wrote:
    >> Hello all,
    >>
    >> I am interested in buying a booster and just wanted to find out who you 
    >> all think builds a good system (250mw/500mw/1w/2w power levels). Thank
    >> you,
    >>
    >> Matt _______________________________________________
    >> Talk mailing list
    >> Talk at seattlewireless.net
    >> http://seattlewireless.net/mailman/listinfo/talk
    >>
    >>
    > _______________________________________________ 
    > Talk mailing list
    > Talk at seattlewireless.net
    > http://seattlewireless.net/mailman/listinfo/talk 
    >


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