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2.4 or 5.8 for my setup?

Wed Jul 02, 2008 4:58 pm

hi guys
I am setting up an ap on the top of a 14 story building. my clients will all b within 5km radius of the ap with LOS.
i am nt sure which band 2 use? 2.4 or 5.8?
there are quite a few 2.4 networks in the area.
if i use 5.8. hw many dBi sector antena shuld i use for the ap and for clients?
thanks
 
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Ibersystems
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:15 am

Hi,

I think better to use 5,8 GHz.

You can use 3 sector antenas with 14-17 dbi and 19 dbi for costumers. This is too much for 5 Kms.. but with this you can play with TX Power in wlan configuration.
Martín Ruiz
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 1:34 pm

hi martin,
why do u say it is too much?is the 14dbi 120 degree ok bt the 19 dbi grid 2 much?could i rather use a 14 dbi bt increase the tx power?
thanx
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 1:51 pm

yes,

but is better much power so you can reduce TX power than have only -85 in your connection.

I think 14+19 is ok with 100 mW and later reduce TX power.
Martín Ruiz
martinruiz at ibersystems.es
Experto en redes WiFi y enlaces WiFi.

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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 2:06 pm

is it possible 2 give an estimate of the increase in throughput with a 19 dbi instead of 14dbi for the cpe? thank
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 10:57 pm

i have 3x120 degree sectorial 2.4ghz 15dbi antennas and with 60+ clients working great. I have clients connected till 4km with 15dbi grid antenna with a good rx signal. U can get -70 or better with this config on 5km i suppose :D(with 15dbi grid). I think that there is no need to spend much money to build a very good system(and more expensive on client side to) when u don't need it. 2.4 fits your needs for the radius of 5km.
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:16 pm

thanks n2m bt how many other 2.4 ghz networks r in your area? i hav about 20 bt most are home networks
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:16 pm

thanks n2m bt how many other 2.4 ghz networks r in your area? i hav about 20 bt most are home networks
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:17 pm

thanks n2m bt how many other 2.4 ghz networks r in your area? i hav about 20 bt most are home networks
 
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:18 pm

thanks n2m bt how many other 2.4 ghz networks r in your area? i hav about 20 bt most are home networks
 
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n2m
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Re: 2.4 or 5.8 for my setup?

Thu Jul 03, 2008 11:45 pm

ohh there are more than 30 aps on the area :D
 
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Re: 2.4 or 5.8 for my setup?

Fri Jul 04, 2008 11:59 am

wow 30, i should b fine then haha
 
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Re: 2.4 or 5.8 for my setup?

Fri Jul 04, 2008 12:42 pm

yes it will be just fine ;)
 
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sandov63
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Re: 2.4 or 5.8 for my setup?

Wed Jul 09, 2008 4:25 pm

i have 3x120 degree sectorial 2.4ghz 15dbi antennas and with 60+ clients working great. I have clients connected till 4km with 15dbi grid antenna with a good rx signal. U can get -70 or better with this config on 5km i suppose :D(with 15dbi grid). I think that there is no need to spend much money to build a very good system(and more expensive on client side to) when u don't need it. 2.4 fits your needs for the radius of 5km.
remenber gentlemans,, the less frecuency in hertz the more signal travel along ,, for that signals in 2.4 band covers more distance but has more noise, 5ghz travels less along ,, far... less but less noise, the trick with 5ghz is the power inserted for transmision, thanks and excuseme for my poor english.
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