http://www.fament.com/wireless/calculators/fresnel.php
Got a explanation what Fresnel zone is as well got a online calculator so you can calculate your Fresnel zone plus the formula how to do it. Best regards, Eje Gustafsson mailto:[EMAIL PROTECTED] The Family Entertainment Network http://www.fament.com Phone : 620-231-7777 Fax : 620-231-4066 - Your Full Time Professionals - eBay UserID : macahan --- searchable smartBridges mailing list archive. http://www.mail-archive.com/smartbridges40part-15.org/ -- DB> First off, is there some resources that describe what the Fresnel zone is, and also what the differences are between horszontal and virtical polarity? DB> Dennis DB> ----- Original Message ----- DB> From: David Blood DB> To: [EMAIL PROTECTED] DB> Sent: Wednesday, August 06, 2003 8:05 PM DB> Subject: RE: [smartBridges] Best and simplest deployment tools DB> You may not have a clear Fresnel Zone. You may have clear line of sight but if you are surrounded by 50-60 foot trees that only gives you 20- 30 ft clearance. If you have 40 ft tree are .5 DB> mile mark that you can just see the tower over it could be hurting you signal. If this is the case Horizontal polarity may help. Also netstumbler/ministubler is great for testing the signal DB> strength without have to associate with the ap. DB> Kind Regards, DB> David DB> David Blood DB> Account Executive DB> SpeedyQuick Networks, Inc DB> Boise, Id DB> [EMAIL PROTECTED] DB> 208-284-5505 DB> -----Original Message----- DB> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dennis Burgess DB> Sent: Wednesday, August 06, 2003 6:53 PM DB> To: [EMAIL PROTECTED] DB> Subject: Re: [smartBridges] Best and simplest deployment tools DB> No prob: ) DB> I have one APPO currently, it has a 2 inch N Ginder changer then plugs into the N connector on the 8 inch pigtal off a MaxRAD WISP 14db 90degree antenna. No AMP just the APPO direclty to the DB> antenna. It is currently about 80 feet up with the sourrounding trees at 50-60 feet up. The area is heavy trees, but we are above them. I can get good coverage anywhere within .25 miles with DB> just a ABI. I get better singal when I use a ABO with 12 feet of RG5 (whatever comes with the mag mount from pac wireless) connected to a 7db mobile antenna. I can get about .75 miles out with DB> just the ABI in one spot on the road. Other than at, I hav'ent got much else. I have tried from a hill with a good line of sight to the APPO. I have a ABT, that just sux so far! DB> Any other suggestions? DB> Dennis DB> ----- Original Message ----- DB> From: Blazen Wireless DB> To: [EMAIL PROTECTED] DB> Sent: Wednesday, August 06, 2003 7:48 PM DB> Subject: Re: [smartBridges] Best and simplest deployment tools DB> 1st off you need to give us details one how you have the APPO set up on a tower on a hill on a house, does it have an omni if so what type what polarity etc. Did you do a site survey in DB> that area to see if there is interference especially if you are vertical polarity! if there is which I suspect then I would suggest going H polarity. Until we know your layout we can offer much DB> more. DB> ----- Original Message ----- DB> From: Dennis Burgess DB> To: [EMAIL PROTECTED] DB> Sent: Wednesday, August 06, 2003 4:14 PM DB> Subject: [smartBridges] Best and simplest deployment tools DB> I have been having a hard time getting signal. Most of my customers are around 40% RSSI with Airbridge Indoors and are working well so far. But, all these locations are within a mile of DB> my Tower. I have a VERY hard time getting anything over a mile! DB> Anyone wish to give me some pointers? I have been using a AirBridge Outdoor plus a 7db omni mag mount from Pac Wireless and a 19db grid from Pac to test for signal. But it really stinks DB> when I don't even know if my signal from the tower is getting to me.. The only thing I have is SimpleMonitor, which takes some time to assoicate sometimes. DB> Dennis -- [This E-mail scanned for viruses by Declude Virus] The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org
