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Laurent GUERBY, 21/05/2014 08:06

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{{>toc}}
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h1. TSF
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Also see [[AirOS]]
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h2. Tests radio
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[[RadioPechDavid20120727]]
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h2. Antennas
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http://dl.ubnt.com/docs/UWC/2012_Chicago/UWC-AirMax_Matt.pdf
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h2. Revolution
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LOS problems due to tree? Announcing the revolutionary AirFresnelCleaner
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http://forum.ubnt.com/showthread.php?t=50439
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h2. Propagation loss
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http://www.ko4bb.com/Manuals/05)_GPS_Timing/E10589_Propagation_Losses_2_and_5GHz.pdf
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VHF/UHF/Microwave Radio Propagation: A Primer for Digital Experimenters http://www.tapr.org/ve3jf.dcc97.html
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h2. Path Loss
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http://en.wikipedia.org/wiki/Path_loss
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http://wiki.ubnt.com/AirMax_Products
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http://dl.ubnt.com/UBNT-gain_matrix_2.pdf
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http://www.distributed-wireless.com/calculators/pathloss_RSSI.html
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http://www.complextoreal.com/chapters/linkbud.pdf
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http://www.wirelessconnections.net/calcs/FresnelZone.asp
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http://www.zytrax.com/tech/wireless/calc.htm
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http://www.wlanantennas.com/fresnel_zone.php
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<pre>
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Path loss 5.8 GHz (for 2.4 GHz remove 8 dB)
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0.5 km 102 dB 2.5m
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1.0 km 108 dB 3.6m
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1.5 km 111 dB
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2.0 km 114 dB 5.1m (5.2 at 5.5 GHz 7.91 at 2.4 GHz)
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2.5 km 116 dB
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3.0 km 117 dB
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4.0 km 120 dB 7.2m
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5.0 km 121 dB
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6.0 km 123 dB
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7.5 km 125 dB
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8.0 km 126 dB 10.2m
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10  km 128 dB
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12  km 129 dB
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15  km 131 dB
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16  km 132 dB 
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20  km 134 dB
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24  km 135 dB
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26  km 136 dB
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32  km 138 dB
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40  km 140 dB
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50  km 142 dB
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60  km 143 dB
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80  km 146 dB
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100 km 148 dB
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150 km 151 dB
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</pre>
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MCS15 -75
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<pre>
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-x + g + 27 = -75
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x = g + 27 + 75
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</pre>
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Loco g = 13 x = 115 ~ 2 km
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NS   g = 16 x = 118 ~ 3 km
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5G19 g = 19 x = 121 ~ 5 km
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5G20 g = 20 x = 122 ~ 5.5 km
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NB22 g = 22 x = 124 ~ 6  km
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NB25 g = 25 x = 127 ~ 8  km
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RD30 g = 30 x = 132 ~ 16 km
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RD34 g = 34 x = 136 ~ 26 km
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MCS12 -84 x=g+27+84=g+111
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Loco g = 13 x = 124 ~ 6 km
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NS   g = 16 x = 127 ~ 8 km
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5G19 g = 19 x = 130 ~ 14 km
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5G20 g = 20 x = 131 ~ 15 km
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NB22 g = 22 x = 133 ~ 18 km
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NB25 g = 25 x = 136 ~ 26 km
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RD30 g = 30 x = 141 ~ 45 km
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RD34 g = 34 x = 145 ~ 70 km
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MCS0 -96 x=g+27+96=g+123
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Loco g = 13 x = 136 ~ 26 km
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NS   g = 16 x = 139 ~ 35 km
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5G19 g = 19 x = 142 ~ 50 km
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5G20 g = 20 x = 143 ~ 60 km
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NB22 g = 22 x = 145 ~ 70 km
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NB25 g = 25 x = 148 ~ 100 km
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RD30 g = 30 x = 153 ~ 150+ km
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RD34 g = 34 x = 157 ~ 150+ km
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http://dl.ubnt.com/UBNT-MIMO_Data_Rates_2.pdf
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<pre>
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MCS MOD Spatial Streams 40Mhz channel 20Mhz channel 10MHz channel 5Mhz channel
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                        400ns GI      800ns GI      800ns GI       800ns GI
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0 BPSK 1X1 15 6.5 3.25 1.625
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1 QPSK 1X1 30 13 6.5 3.25
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2 QPSK 1X1 45 19.5 9.75 4.875
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3 16-QAM 1X1 60 26 13 6.5
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4 16-QAM 1X1 90 39 19.5 9.75
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5 64-QAM 1X1 120 52 26 13
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6 64-QAM 1X1 135 58.5 29.25 14.625
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7 64-QAM 1X1 150 65 32.5 16.25
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8 BPSK 2X2 30 13 6.5 3.25
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9 QPSK 2X2 60 26 13 6.5
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10 QPSK 2X2 90 39 19.5 9.75
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11 16-QAM 2X2 120 52 26 13
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12 16-QAM 2X2 180 78 39 19.5
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13 64-QAM 2X2 240 104 52 26
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14 64-QAM 2X2 270 117 58.5 29.25
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15 64-QAM 2X2 300 130 65 32.5
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</pre>
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<pre>
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Rocket M5 
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TX
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MCS0 27 dBm +/- 2 dB
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MCS1 27 dBm +/- 2 dB
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MCS2 27 dBm +/- 2 dB
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MCS3 27 dBm +/- 2 dB
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MCS4 26 dBm +/- 2 dB
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MCS5 24 dBm +/- 2 dB
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MCS6 22 dBm +/- 2 dB
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MCS7 21 dBm +/- 2 dB
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MCS8 27 dBm +/- 2 dB
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MCS9 27 dBm +/- 2 dB
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MCS10 27 dBm +/- 2 dB
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MCS11 27 dBm +/- 2 dB
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MCS12 26 dBm +/- 2 dB
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MCS13 24 dBm +/- 2 dB
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MCS14 22 dBm +/- 2 dB
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MCS15 21 dBm +/- 2 dB
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RX
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MCS0 -96 dBm +/- 2 dB
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MCS1 -95 dBm +/- 2 dB
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MCS2 -92 dBm +/- 2 dB
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MCS3 -90 dBm +/- 2 dB
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MCS4 -86 dBm +/- 2 dB
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MCS5 -83 dBm +/- 2 dB
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MCS6 -77 dBm +/- 2 dB
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MCS7 -74 dBm +/- 2 dB
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MCS8 -95 dBm +/- 2 dB
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MCS9 -93 dBm +/- 2 dB
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MCS10 -90 dBm +/- 2 dB
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MCS11 -87 dBm +/- 2 dB
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MCS12 -84 dBm +/- 2 dB
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MCS13 -79 dBm +/- 2 dB
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MCS14 -78 dBm +/- 2 dB
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MCS15 -75 dBm +/- 2 dB
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Rocket M2
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TX
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MCS0 28 dBm +/- 2 dB
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MCS1 28 dBm +/- 2 dB
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MCS2 28 dBm +/- 2 dB
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MCS3 28 dBm +/- 2 dB
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MCS4 27 dBm +/- 2 dB
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MCS5 25 dBm +/- 2 dB
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MCS6 23 dBm +/- 2 dB
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MCS7 22 dBm +/- 2 dB
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MCS8 28 dBm +/- 2 dB
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MCS9 28 dBm +/- 2 dB
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MCS10 28 dBm +/- 2 dB
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MCS11 28 dBm +/- 2 dB
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MCS12 27 dBm +/- 2 dB
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MCS13 25 dBm +/- 2 dB
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MCS14 23 dBm +/- 2 dB
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MCS15 22 dBm +/- 2 dB
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RX
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MCS0 -96 dBm +/- 2 dB
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MCS1 -95 dBm +/- 2 dB
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MCS2 -92 dBm +/- 2 dB
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MCS3 -90 dBm +/- 2 dB
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MCS4 -86 dBm +/- 2 dB
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MCS5 -83 dBm +/- 2 dB
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MCS6 -77 dBm +/- 2 dB
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MCS7 -74 dBm +/- 2 dB
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MCS8 -95 dBm +/- 2 dB
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MCS9 -93 dBm +/- 2 dB
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MCS10 -90 dBm +/- 2 dB
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MCS11 -87 dBm +/- 2 dB
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MCS12 -84 dBm +/- 2 dB
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MCS13 -79 dBm +/- 2 dB
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MCS14 -78 dBm +/- 2 dB
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MCS15 -75 dBm +/- 2 dB
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</pre>
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h2. Fixation serre joint
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http://doc.rhizome-fai.net/doku.php?id=howto:deploiement:fixer_une_antenne
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h2. Noise
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http://ml.ninux.org/pipermail/battlemesh/2014-April/002924.html
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It depends a bit on the receiver's quality, I've had experiences where
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the SNR could drop to about 8 and the link would still somewhat work.
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The thermal noise is mostly intrinsic to how energy relates at a
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particle level, this is denoted by the Boltzmann constant (k). 
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Further, it depends on the bandwidth (B) used and temperature (T).
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Nthermal = B * k * T = 20*10^6 Hz (802.11 channel) * 1.38065*10^-23 J/K 
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* 300 K (27 Celsius) ~= 8.28 * 10^-11
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This gives the noise in Watts, to change it to dBm (which references
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miliWatts), you take 10*log10( N * 1000 ) ~= -100.
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[1] Has a nice table with examples of this noise.
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In reality, there's more interference than just from the temperature.
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It's quite probable your receiver adds another 5 dBm to its reported
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noise to account for this.
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I also recall from my time working on my thesis that receivers/drivers
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tend to return a static value for noise, rather than actually measure
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it.
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[1] http://en.wikipedia.org/wiki/Thermal_noise#Noise_power_in_decibels
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h2. DFS radars meteo
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* http://battlemesh.org/BattleMeshV7/Agenda?action=AttachFile&do=get&target=2014-05-17_wbmv7_DFS.pdf
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* ETSI EN 301 893 v1.7.0   (2012-01)
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** http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.00_40/en_301893v010700o.pdf
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* ETSI and Europe http://forum.ubnt.com/showthread.php?t=52560 
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* power density and ETSI http://forum.ubnt.com/showthread.php?t=53123 
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* "2. Slave devices with a maximum EIRP of less than 23 dBm do not have to implement radar detection." - Table D.2 http://linuxwireless.org/en/developers/DFS/ETSI 
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* http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.01_60/en_301893v010701p.pdf
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** http://community.ubnt.com/t5/airOS-Beta/Alleviating-the-lack-of-quot-compliance-test-quot/m-p/744726#U744726
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* [PATCH 0/4] ath9k: integrate DFS detection http://www.mail-archive.com/ath9k-devel@lists.ath9k.org/msg08370.html
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* http://education.meteofrance.com/jsp/site/Portal.jsp?page_id=12060&document_id=21887&portlet_id=53478
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* DFS and AirOS 5.5 http://forum.ubnt.com/showthread.php?t=44105&page=8
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* Toulouse meteo france 5625 MHz
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* http://www.ladepeche.fr/article/2002/10/31/352210-un-radar-meteo-couvrira-le-tarn-et-l-aveyron.html
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** radar meteo pres d'Albi lieu dit « Le Puech », commune de Monclar. 
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** 5640 MHz ?
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* liste des radars en Europe : EUMETNET/OPERA - Radar Network http://www.eumetnet.eu/radar-network
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** marche plus : http://www.knmi.nl/opera/euradars3.html
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<pre>
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From: 	Jocelyn Delalande jocelyn.lists2012 at crapouillou.net
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Reply-to: 	fai-locaux at fdn.fr
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To: 	fai-locaux at fdn.fr
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Subject: 	Re: [fai-locaux] Ubiquiti - Support du DFS
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Date: 	Sun, 15 Apr 2012 19:12:56 +0200
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Mailer: 	Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20120129 Thunderbird/10.0
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Au passage, j'ai pu trouver une liste des radars météo en Europe
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données en KMZ, présentées sur une carte où dans une interface maison.
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http://www.knmi.nl/opera/euradars3.html
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La bande qui nous intéresse est la "C band" chaque radar présente des 
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contacts administratifs, sa fréquence précise et son rayon d'action 
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approximatif. Pratique… Rien ne dit que ça ne soit exhaustif de l'usage 
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radar de la bande 5GHzet ça n'enlève rien à la nécessité légale 
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d'activer la DFS ceci-dit… Comme disait burban, y'a peut-être du militaire.
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Ciao,
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Jocelyn
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</pre>
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h2. Equipe de deploiement
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Le groupe TSF est mis en "group watch" de tous les projets de deploiement : inscrivez-vous dans ce groupe pour être tenu au courant de toute évolution ou nouveau projet.
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h2. Obsolète
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Issue #147
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Groupe de suivi manuel par Laurent en attendant
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https://www.chiliproject.org/issues/802
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296 5 Sylvain Faivre
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297 16 Jocelyn Dealande
* Adrien
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* bikepunk
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* Théo
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* Jérémie Dimino
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* Sylvain F
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* Jocelyn Delalande