[MLB-WIRELESS] World Wifi record

[Peter Berrett]

Re: [MLB-WIRELESS] World Wifi recordOk Let's do a sample calculation now based on the actual equipment I own

I'll use the calculator at 

http://www.afar.net/rf-link-budget-calculator/

We'll assume that the setup at Binunyong has the maximum power output made up of 30db gain dish plus 8db power output and -2db cable loss = 36 dbm maximum legal power

At my end on Mt Dandenong a 24 dbm ex galaxy dish plus 14 dbm power and allow 2dbm cable loss with a Ubiquity bullet with -95 db receiver sensitivity @ 1Mb/s 

That should give a receive signal strength of -84.3 dbm with a fade margin of 10.7db

Not a huge margin to play with but arguable doable. The Ubiquity will probably do 256kbs at -100 or -105dbm so that should give a bit more elbow room.

cheers Peter  







  ----- Original Message ----- 
  From: Peter Buncle 
  To: Peter Berrett ; vk3jed at vkradio.com ; melbwireless at wireless.org.au 
  Sent: Monday, January 02, 2012 11:41 AM
  Subject: RE: [MLB-WIRELESS] World Wifi record


  Hi Peter,

   

   

  If you're talking about the grids with the gold anodized aluminum, 24db

   

  The ex galaxy ones with a width of around 600mm, they are 24db too.

   

   

   

  Kind Regards

   

   

  Peter 

   

   


------------------------------------------------------------------------------

  From: Peter Berrett [mailto:vk3pb at optusnet.com.au] 
  Sent: Monday, 2 January 2012 11:18 AM
  To: Peter Buncle; vk3jed at vkradio.com; melbwireless at wireless.org.au
  Subject: Re: [MLB-WIRELESS] World Wifi record

   

  By the way Peter

   

  What gain do those ex Galaxy slatted dishes have?

   

  cheers Peter

   

   

    ----- Original Message ----- 

    From: Peter Buncle 

    To: vk3jed at vkradio.com ; vk3pb at optusnet.com.au ; melbwireless at wireless.org.au 

    Sent: Monday, January 02, 2012 9:54 AM

    Subject: Re: [MLB-WIRELESS] World Wifi record

     

    Hi tony

    The north and south 2.4 antennas are facing wwn and wws. They are only 14db panels the range isn't suitable for record attempts.

    BUT I did pickup gho north in the past at the geelong side with the horizontal pol wave guide !

    So it does work well.

    Keep me informed of your schedule as I'm happy to help out with the melbourne region end.

    Cheers

    Peter



    ----- Original Message -----
    From: melbwireless-bounces at wireless.org.au <melbwireless-bounces at wireless.org.au>
    To: Peter Berrett <vk3pb at optusnet.com.au>; MW Wireless <melbwireless at wireless.org.au>
    Sent: Mon Jan 02 07:33:14 2012
    Subject: Re: [MLB-WIRELESS] World Wifi record

    At 11:02 PM 1/1/2012, Peter Berrett wrote:
    >Just repeating an earlier question I put on the list.
    >
    >Does anyone know the exact angles that the north and south 2.4 mhz beams are
    >pointing at GHO?
    >
    >What direction are they pointing?

    Does anyone know the noise floor there too?

    73 de VK3JED / VK3IRL
    http://vkradio.com

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