Re: [Openbts-discuss] Coverage radius

[Tomas K. <de...@vo...>]

Hi,
I'm considering to purchase duplexers from China, which are quite cheap

e.g.
http://www.alibaba.com/product-gs/523380531/low_cost_GSM_duplexer.html
http://www.alibaba.com/product-gs/254132861/GSM_Duplexer.html

Tomas

> no you dont need seperate daughter board. you need to isolate that
> uplink and downlink.
> you can achieve this using duplexer .
> please refer sylvain project for this. on his website.
> On Sat, Mar 31, 2012 at 3:31 PM, Orkhan Badirkhanli <orx...@gm...> wrote:
>> Appreciate your comments
>>
>> So, to make the coverage be extended to for example 50m, I will need a
>> special daughterboard right?(and if I am not wrong ettus only has RFX900 and
>> RFX1200 with 200mW, which does not change the coverage much)
>>
>> In the CLI of OpenBTS the power is represented in dB - not dBm. Are they
>> meant to be the same?
>>
>> Also, the rxgain command in the CLI can only set power levels between 0 and
>> 38dB. Surely, the value can also be set by config command but, why does
>> rxgain sets values in only that range?
>>
>> Thank you
>>
>>
>> On Sat, Mar 31, 2012 at 5:19 AM, David Burgess <da...@ra...>
>> wrote:
>>>
>>> Probably just 10-20 meters.  The main thing limiting your range will be
>>> uplink/downlink isolation.  You'll probably get better range by turned
>>> *down* the power to something like 5-10 mW.
>>>
>>>
>>> On Mar 30, 2012, at 5:05 PM, Orkhan Badirkhanli wrote:
>>>
>>> Hello
>>>
>>> For OpenBTS with standard usrp equiment, what is the maximum coverage
>>> radius outdoors and indoors with maximum power settings?
>>>
>>> I am using usrp n210 with SBX
>>>
>>> Thanks
>>>
>>> --
>>> Orkhan
>>>
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>>
>>
>> --
>> Orkhan
>>
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