Rob,

Sector, panel, and other directional antennas have multiple lobes (think of stretched out fingers).  The middle lobe (or finger -no jokes please!) has the greatest signal strength and sensitivity.  Since you have one on your tower and you are using a directional on your airNIC, you need to align the middle lobes up on both units.  You may see a rise in signal, then a drop, then a rise again, so don't rotate back after seeing the drop in signal!  Just keep turning the antenna more until you get the highest rise in signal.

The side lobes (other fingers) are deceptive.  Seek the middle path -er- lobe.

Good luck!
Sevak
diDi Wireless Communities, Inc.

On Sun, 2003-08-10 at 13:55, Rob Cleminson wrote:
I have a question?

 

I have an AP Pro Outdoor mounted up a 45 metre tower with a 13dbi 90% sector antenna –

 

I went 1 mile away with my laptop and an AirNic USB with the short stubby – I was able to get a 75% signal strength and 90% Link Quality – I then attached a 12dbi Cantenna to the AirNic and the signal dropped – I also tried an 18dbi Panel Antenna and again the signal was not as good. – Why is this? – I had perfect line of sight.

 

I want to find a good quality customer antenna that is not too expensive and that will give me a better reception? Any suggestions?

 

Regards

 

Rob Cleminson

email: [EMAIL PROTECTED]

office:  01277-227130

fax:     01277-227068

mobile:07774-401200

web: http://www.remotebackups.co.uk

 

 


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