Excellent news. Do you know if there is an easy way now to see where the TDWR radars are (for curiosity's sake)?
Randy On 3/11/2010 3:56 PM, Jack Unger wrote: > Randy, > > The 5 GHz equipment approval process is currently on hold at the request > of the FAA and the NTIA. Airport Terminal Doppler Weather Radars (TDWR) > operate in the 5.6 GHz range and have been experiencing interference > from current 5475-5725 MHz equipment. Because of this interference, a > new Dynamic Frequency Selection (DFS) algorithm is being developed to > allow newly-certified equipment to detect and avoid nearby TDWR radar > systems. Until the new algorithm is developed and the FCC certification > process re-started, there will be no new outdoor 5.4 equipment certified. > > To allow recertifications to restart before the new algorithm is > developed and implemented, the wireless industry has been meeting with > the FCC, FAA and NTIA. The FAA and NTIA agreed to allow 5 GHz outdoor > equipment certifications to be restarted if the industry would provide a > database that allowed an operator to a) See if their outdoor base > stations are within 35 km of one of the airport TDWR sites, and b) If > within 35 km, voluntarily register their equipment type and contact > information in the database. Each airport TDWR site uses one frequency. > Operators are requested to maintain a minimum 30-MHz center-to-center > frequency separation away from the single frequency used by the > neighboring TDWR. > > If/when TDWR interference does occurs, the voluntary database should > help the FCC to contact the operator of the equipment that may be > causing the interference and request a frequency change or request that > the one nearby TDWR frequency be excluded from the DFS channel search list. > > Once the new TDWR-aware algorithm is ready for incorporation into new 5 > GHz equipment, this database is expected to slowly become obsolete as > the older equipment is retired. > > WISPA's FCC Committee is working with the industry group (Motorola, > Cisco, Atheros, Intel, etc.) as well as with the FCC, FAA and NTIA to > help find a solution to this TDWR-interference problem. We'll provide > more information when significant developments occur. > > Jack Unger > WISPA FCC Committee Chair > 818-227-4220 > > > Randy Cosby wrote: > >> I'm trying to compile a list of options for FCC certified 5.4 ptp radios >> for short backhaul links. Off the top of my head, I can remember: >> >> Tranzeo TR-5A >> Trango TrangoLINK-45 >> Radwin 2000 (has mimo as well) >> Motorola PTP 100, 200, 300, 500, 600 >> >> Any others I'm not aware of? Sure would be nice to see more mimo/N >> radios certified in 5.4. Anyone working through the approval process >> (ligowave?). >> >> >> >> > -- Randy Cosby Vice President InfoWest, Inc 435-674-0165 x 2010 http://www.infowest.com/ "Letting off steam always produces more heat than light." - Neal A. Maxwell -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
