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Frequent Contributor II
Posts: 193
Registered: ‎11-18-2011

LAR-1 & LAR-24

[ Edited ]

LAR : Aruba Outdoor Antenna Lightning Arrestor

AP-LAR-1 : Supports RF frequency passthrough of 2Ghz – 6Ghz.

AP-LAR-24 : Supports RF frequency Passband of 2.4-2.5 GHz

 

Can i use LAR-1  for 2.4GHz antenna ?

 

MVP
Posts: 1,408
Registered: ‎05-28-2008

Re: LAR-1 & LAR-24

[ Edited ]

Hi,

YEP. You can use LAR-1 to connect 2.4Ghz antenna. :smileyhappy:

 

(just make sure to use the right antenna type (N-Type)

ap-lar-1.PNG

 

 

Have a lovely week.

 

me

*****************2Plus Wireless Solutions****************************
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************ Don't Forget to Kudos + me,If i helped you******************
Frequent Contributor II
Posts: 193
Registered: ‎11-18-2011

Re: LAR-1 & LAR-24

Thanks ,

below is my antenna .

it is mentioned N-type male , but not mentioned N-type female ?

http://www.arubanetworks.com/pdf/products/ap-ant-2005_ss.pdf

Also what does N-type mean ?

MVP
Posts: 1,408
Registered: ‎05-28-2008

Re: LAR-1 & LAR-24

[ Edited ]

Hi,

:smileyhappy:

This is N-Type female:

220px-N_connector_female.jpg

 

This is N-Type Male:

250px-N_Connector.jpg

 

More info about thoese connectors:

http://en.wikipedia.org/wiki/N_connector

 

 :smileywink:

N-Type Male = your ant

N-Type Female = You AP unit (it should be :) ) - i dunno which AP module are u using.

 

Look on this example:

 

AP-175 Antenna ports:

feamale.PNG

Your Antenna type:

male.PNG

 

[Edited per Guidelines]

 

Me.

*****************2Plus Wireless Solutions****************************
Aruba Airheads - Powered By community for empower the community
************ Don't Forget to Kudos + me,If i helped you******************
Frequent Contributor II
Posts: 193
Registered: ‎11-18-2011

Re: LAR-1 & LAR-24

[ Edited ]

Thanks alot , perfect . i'm using AP-175

Aruba
Posts: 161
Registered: ‎04-03-2007

Re: LAR-1 & LAR-24

telnet-1,

 

NO NO NO NO NO.    

 

Do NOT use LAR-1 for 2.4GHz any more.

 

The AP-LAR-24 was developed to mitigate increasing problems with out-of-band interference by high-power cellular and other systems. AP-LAR-24 should be considered mandatory on all outdoor networks, especially outside the US. ** Without the AP-LAR-24 can result in complete failure of 2.4GHz operations. **

 

The customer is actually getting two products for the price of one with the AP-LAR-24. They get a high quality lightning arrestor, as well as a high quality bandpass filter (BPF) for the 2400-2483MHz band.

 

An insertion loss chart is attached to this posting that shows the BPF performance.

 

***

 

On another note, here is an answer to a question you did not ask.   Do you need to individually ground each LAR?

 

The answer is No.  So long as the AP chassis is properly earthed.

 

You will find a ground ring with a crimp-type connector in the box for both the LAR-1 and LAR-24.  However, use of this is only necessary if the AP itself is not grounded (which should never ever be the case).

 

In the event of a discharge event, the impedence of the ground path through the chassis is lower than the impedence through copper grounding wires run directly to the LARs.  So even if you properly hook up individual copper cables with 6mm cross sections to each LAR, discharge will flow through the chassis anyways.

 

Given the cost of copper wire, the cost of labor to connect ground lines, and the poor appearance of having many ground wires running to individual antennas, this is an obvious benefit for all Aruba customers.

 

LARs should be properly torqued and weatherproofed as documented elsewhere in Arubapedia and our Installation Guides.  


-cl
Frequent Contributor II
Posts: 193
Registered: ‎11-18-2011

Re: LAR-1 & LAR-24

[ Edited ]

Thanks alot Clukas , You saved me 

 

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