You have lots of choices these days. For a long range link you should consider a high grade form factor that can tolerate harsh environmentals. You also should consider something that adaptively modulates. We have systems that can deliver 44mbps net 30 miles with clear LOS. With absolutely no line-of-sight, we can still deliver 22mbps or better 6 or more miles. We have lots of installs to support that claim. This product is the BreezeACCESS LB. It can sustain very stable links (1 frame error every several weeks is not uncommon).
There are two other vendors with very high grade such products: Orthogon Systems (formerly Piping Hot) and Redline. Patrick Leary Alvarion -----Original Message----- From: Jim Aspinwall [mailto:[EMAIL PROTECTED] Sent: Monday, July 14, 2003 9:06 PM To: [EMAIL PROTECTED] Subject: [BAWUG] Canopy or any 802.11a/5.8GHz Range ? Doing some pencil-scratching on point-to-point systems. Motorola's Canopy Backhaul 'system' claims "up to" 35 mile range with 'reflector' antennas. OK that's a 23-24dbi dish - fine. Crunching numbers and using a radio coverage program to model a 12 mile path... 30dbm power out + 23 dbi antenna gain = 53 dbm ERP The coverage program tells me the 12 mile path has -133 db path loss = -80 db at the receive antenna. Add +23 dbi Rx antenna gain I've got -57db to the receiver, whose specs indicate -79 or -83 sensitivity depending on the sheet you read. That leaves at most a 26 db fade margin/margin of error for atmospherics, weather, etc. That's NOT much at 5.8 GHz, especially going from a 3700 foot coastal range hilltop, pointing NNW down onto a valley building top. Questions: 1. Has anyone used Canopy or equivalent 5.8GHz gear, legal power, etc. for point-to-point hops? 2. If so, at what ranges under what site conditions? 3. Has anyone got a preference for/experience with licensed backhaul (20-50-100Mbps) RF equipment? Recommendations? -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless This mail passed through mail.alvarion.com **************************************************************************** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. **************************************************************************** ******** -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
