Supplement to the Canopy System Release 8 User Guide PMP 400

PMP 400 and PTP 200 SeriesCanopy User Guide Supplement3 PlanningPMP 400 and PTP 200 Series systems use a 10 MHz channel size configurable on 5 MHzcenters. This channel size, along with some different characteristics due to the use OFDM carriertechnology and QPSK, 16 QAM, or 64 QAM modulation, supports somewhat different channelplanning than for standard Canopy. (For reference, PMP 100/200 Series uses 20 MHz channelsconfigurable on 5 MHz centers, single carrier technology, and 2-level and 4-level FSKmodulation.)3.1 TOWER CHANNEL PLANNINGFor a single cluster of 4 APs on a tower, 2-channel re-use with channels on 10 MHz channelcenter spacing gives good performance. In channel design parlance, this can be stated as ABABchannel planning, with no guard band needed between A and B. A typical arrangement might beto use radios configured for 5480 MHz aimed north and south, and radios configured for 5490MHz aimed east and west.(For reference, standard Canopy uses 2-channel re-use with clusters of 6 APs on a tower withchannel center spacing of either 25 MHz for Advantage APs or 20 MHz for non-Advantage APs.This is ABCABC channel planning, with 5 MHz guard band between the 20 MHz channels forAdvantage APs and no guard band needed for non-Advantage.)Available 5.4 GHz channel center frequencies for each region are shown in Table 3. These varyby region due to• different band edge RF specifications (for example, between Canada/US andEurope)• requirements in Europe and Canada to not impinge on the frequencies between 5600and 5650 MHz, which are frequencies on which some weather radar operateTable 3: 5.4 GHz Channel Center Frequencies, by RegionRegionRange of Center FrequenciesAvailable (MHz)(on 5 MHz centers within thisrange, inclusive)Maximum number ofnon-overlappingchannelsUS 5480 - 5710 24Canada 5480 – 5595, 5655 - 5710 18Europe 5475 - 5595, 5655 - 5715 20US FSK (for comparison) 5495 - 5705 11Canada FSK (forcomparison)5495 - 5575, 5675 - 57057Available 4.9 GHz channel center frequencies are shown in Table 4.Table 4: 4.9 GHz Channel Center FrequenciesRange of Center FrequenciesAvailable (MHz)(on 5 MHz centers within thisrange, inclusive)Maximum number ofnon-overlappingchannels4945 - 4985 5Issue 3, January 2009 Page 13 of 45