[Battlemesh] Custom Dual AP antenna setup for one router antenna plug

[cmsv]

On 09/21/2013 12:44 PM, Huub Schuurmans wrote:
> Op 9/21/13 5:44 PM, cmsv schreef:
> ...
>>
>> I currently use LMR400 and some LMR200. The cables are not longer than
>> 30cm and i am curious to know if in fact there a lot of loss as you say.
> 
> Only 30 cm? No significant loss.

Even at 3 meters and with max load SWR of 2 a higher frequency and
connectors the loss is less than 1db. 0.804db or maybe a bit more but
way bellow 5.1db using the sma-rp spliter option that we previously
talked about.

Please correct me if i am wrong.

>> My current standard  setup
>> http://wirelesspt.net/wiki/Construindo_um_kit_wirelesspt
>> (translation bar provided)
>>
> ...
> 
>>
>> By "thick N type" could you clarify with reference numbers?
> 
> H2000 cable,  0,2 dB/m

Our lmr400 loss calculations:

Product Performance Parameters
Attenuation: 	6.7 db/100ft(38,5m) 22.1 db/100mtr
Average Power: 	0.33 KW
Cable Vg: 	85 %
Nominal Td: 	1.2 nSec/ft 	3.92 nSec/mtr
Capacitance: 	23.9 pF/ft 	78.4 pF/mtr

Typical Connector Loss: 	0.1 dB/pair

Cable Assembly Performance
Cable Run Attenuation: 	0.2 dB
Total Cable Assembly Loss: 	0.3 dB
Cable Run Efficiency: 	95.2 %
Cable Run Time Delay: 	3.82 nSec

At 30 cm the loss is: 0.083 db
At 3 meters is: 0.804


>>> I would suggest to consider a setup that we have developed since and
>>> have deployed on a large scale: using a box for routing over
>>> ethernet-interfaces. Each ethernet port is connected using an ordinary
>>> utp-cable to a wireless-bridge (we use ubiquity devices in bridging mode).
>>
>> Would it be possible to see a picture of this setup ?
> 
> lots of pictures available ;-)
> e.g.
> http://www.wirelessleiden.nl/album/index.php/CNodeJVC/ombouw_2012/JVC_50
> or, if you like to see the set up on a church tower:
> http://www.wirelessleiden.nl/album/index.php/ztw-SintJanOnthoofdingKerk/bouw
> (this is an official monument, so we could only tie-wraps for fastening
> the equipment).
> 
>>
>> Although i use utp cables i cannot use poe and as far as ubiquity
>> devices they are expensive and i am the only one bearing almost all
>> costs of all hardware.
> 

The Ubiquity Nanostation-M2loco is quite, quite attractive and at a good
price but they have a downside to my needs which is only 16 mb of sdram
which will prevent the a good usage usage of openwrt firmware with a 2.6
or 3.* kernel.

Please correct me if i am overseeing any detail.

This leads me to ask about what openwrt kernel they are running and in
your network case which routing protocol/s are you using ?


> 
> Huub
> 
>