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h1. TSF

Also see [[AirOS]]

h2. Tests radio

[[RadioPechDavid20120727]]

h2. Antennas

http://dl.ubnt.com/docs/UWC/2012_Chicago/UWC-AirMax_Matt.pdf

h2. Revolution

LOS problems due to tree? Announcing the revolutionary AirFresnelCleaner

http://forum.ubnt.com/showthread.php?t=50439

h2. Propagation loss

http://www.ko4bb.com/Manuals/05)_GPS_Timing/E10589_Propagation_Losses_2_and_5GHz.pdf

VHF/UHF/Microwave Radio Propagation: A Primer for Digital Experimenters http://www.tapr.org/ve3jf.dcc97.html

h2. Path Loss

http://en.wikipedia.org/wiki/Path_loss

http://wiki.ubnt.com/AirMax_Products

http://dl.ubnt.com/UBNT-gain_matrix_2.pdf

http://www.distributed-wireless.com/calculators/pathloss_RSSI.html

http://www.complextoreal.com/chapters/linkbud.pdf

http://www.wirelessconnections.net/calcs/FresnelZone.asp

http://www.zytrax.com/tech/wireless/calc.htm

http://www.wlanantennas.com/fresnel_zone.php

<pre>

Path loss 5.8 GHz (for 2.4 GHz remove 8 dB)

0.5 km 102 dB 2.5m

1.0 km 108 dB 3.6m

1.5 km 111 dB

2.0 km 114 dB 5.1m (5.2 at 5.5 GHz 7.91 at 2.4 GHz)

2.5 km 116 dB

3.0 km 117 dB

4.0 km 120 dB 7.2m

5.0 km 121 dB

6.0 km 123 dB

7.5 km 125 dB

8.0 km 126 dB 10.2m

10  km 128 dB

12  km 129 dB

15  km 131 dB

16  km 132 dB 

20  km 134 dB

24  km 135 dB

26  km 136 dB

32  km 138 dB

40  km 140 dB

50  km 142 dB

60  km 143 dB

80  km 146 dB

100 km 148 dB

150 km 151 dB

</pre>

MCS15 -75

<pre>

-x + g + 27 = -75

x = g + 27 + 75

</pre>

Loco g = 13 x = 115 ~ 2 km

NS   g = 16 x = 118 ~ 3 km

5G19 g = 19 x = 121 ~ 5 km

5G20 g = 20 x = 122 ~ 5.5 km

NB22 g = 22 x = 124 ~ 6  km

NB25 g = 25 x = 127 ~ 8  km

RD30 g = 30 x = 132 ~ 16 km

RD34 g = 34 x = 136 ~ 26 km

MCS12 -84 x=g+27+84=g+111

Loco g = 13 x = 124 ~ 6 km

NS   g = 16 x = 127 ~ 8 km

5G19 g = 19 x = 130 ~ 14 km

5G20 g = 20 x = 131 ~ 15 km

NB22 g = 22 x = 133 ~ 18 km

NB25 g = 25 x = 136 ~ 26 km

RD30 g = 30 x = 141 ~ 45 km

RD34 g = 34 x = 145 ~ 70 km

MCS0 -96 x=g+27+96=g+123

Loco g = 13 x = 136 ~ 26 km

NS   g = 16 x = 139 ~ 35 km

5G19 g = 19 x = 142 ~ 50 km

5G20 g = 20 x = 143 ~ 60 km

NB22 g = 22 x = 145 ~ 70 km

NB25 g = 25 x = 148 ~ 100 km

RD30 g = 30 x = 153 ~ 150+ km

RD34 g = 34 x = 157 ~ 150+ km

http://dl.ubnt.com/UBNT-MIMO_Data_Rates_2.pdf

<pre>

MCS MOD Spatial Streams 40Mhz channel 20Mhz channel 10MHz channel 5Mhz channel

                        400ns GI      800ns GI      800ns GI       800ns GI

0 BPSK 1X1 15 6.5 3.25 1.625

1 QPSK 1X1 30 13 6.5 3.25

2 QPSK 1X1 45 19.5 9.75 4.875

3 16-QAM 1X1 60 26 13 6.5

4 16-QAM 1X1 90 39 19.5 9.75

5 64-QAM 1X1 120 52 26 13

6 64-QAM 1X1 135 58.5 29.25 14.625

7 64-QAM 1X1 150 65 32.5 16.25

8 BPSK 2X2 30 13 6.5 3.25

9 QPSK 2X2 60 26 13 6.5

10 QPSK 2X2 90 39 19.5 9.75

11 16-QAM 2X2 120 52 26 13

12 16-QAM 2X2 180 78 39 19.5

13 64-QAM 2X2 240 104 52 26

14 64-QAM 2X2 270 117 58.5 29.25

15 64-QAM 2X2 300 130 65 32.5

</pre>

<pre>

Rocket M5 

TX

MCS0 27 dBm +/- 2 dB

MCS1 27 dBm +/- 2 dB

MCS2 27 dBm +/- 2 dB

MCS3 27 dBm +/- 2 dB

MCS4 26 dBm +/- 2 dB

MCS5 24 dBm +/- 2 dB

MCS6 22 dBm +/- 2 dB

MCS7 21 dBm +/- 2 dB

MCS8 27 dBm +/- 2 dB

MCS9 27 dBm +/- 2 dB

MCS10 27 dBm +/- 2 dB

MCS11 27 dBm +/- 2 dB

MCS12 26 dBm +/- 2 dB

MCS13 24 dBm +/- 2 dB

MCS14 22 dBm +/- 2 dB

MCS15 21 dBm +/- 2 dB

RX

MCS0 -96 dBm +/- 2 dB

MCS1 -95 dBm +/- 2 dB

MCS2 -92 dBm +/- 2 dB

MCS3 -90 dBm +/- 2 dB

MCS4 -86 dBm +/- 2 dB

MCS5 -83 dBm +/- 2 dB

MCS6 -77 dBm +/- 2 dB

MCS7 -74 dBm +/- 2 dB

MCS8 -95 dBm +/- 2 dB

MCS9 -93 dBm +/- 2 dB

MCS10 -90 dBm +/- 2 dB

MCS11 -87 dBm +/- 2 dB

MCS12 -84 dBm +/- 2 dB

MCS13 -79 dBm +/- 2 dB

MCS14 -78 dBm +/- 2 dB

MCS15 -75 dBm +/- 2 dB

Rocket M2

TX

MCS0 28 dBm +/- 2 dB

MCS1 28 dBm +/- 2 dB

MCS2 28 dBm +/- 2 dB

MCS3 28 dBm +/- 2 dB

MCS4 27 dBm +/- 2 dB

MCS5 25 dBm +/- 2 dB

MCS6 23 dBm +/- 2 dB

MCS7 22 dBm +/- 2 dB

MCS8 28 dBm +/- 2 dB

MCS9 28 dBm +/- 2 dB

MCS10 28 dBm +/- 2 dB

MCS11 28 dBm +/- 2 dB

MCS12 27 dBm +/- 2 dB

MCS13 25 dBm +/- 2 dB

MCS14 23 dBm +/- 2 dB

MCS15 22 dBm +/- 2 dB

RX

MCS0 -96 dBm +/- 2 dB

MCS1 -95 dBm +/- 2 dB

MCS2 -92 dBm +/- 2 dB

MCS3 -90 dBm +/- 2 dB

MCS4 -86 dBm +/- 2 dB

MCS5 -83 dBm +/- 2 dB

MCS6 -77 dBm +/- 2 dB

MCS7 -74 dBm +/- 2 dB

MCS8 -95 dBm +/- 2 dB

MCS9 -93 dBm +/- 2 dB

MCS10 -90 dBm +/- 2 dB

MCS11 -87 dBm +/- 2 dB

MCS12 -84 dBm +/- 2 dB

MCS13 -79 dBm +/- 2 dB

MCS14 -78 dBm +/- 2 dB

MCS15 -75 dBm +/- 2 dB

</pre>

h2. Fixation serre joint

http://doc.rhizome-fai.net/doku.php?id=howto:deploiement:fixer_une_antenne

h2. Noise

http://ml.ninux.org/pipermail/battlemesh/2014-April/002924.html

It depends a bit on the receiver's quality, I've had experiences where

the SNR could drop to about 8 and the link would still somewhat work.

The thermal noise is mostly intrinsic to how energy relates at a

particle level, this is denoted by the Boltzmann constant (k). 

Further, it depends on the bandwidth (B) used and temperature (T).

Nthermal = B * k * T = 20*10^6 Hz (802.11 channel) * 1.38065*10^-23 J/K 

* 300 K (27 Celsius) ~= 8.28 * 10^-11

This gives the noise in Watts, to change it to dBm (which references

miliWatts), you take 10*log10( N * 1000 ) ~= -100.

[1] Has a nice table with examples of this noise.

In reality, there's more interference than just from the temperature.

It's quite probable your receiver adds another 5 dBm to its reported

noise to account for this.

I also recall from my time working on my thesis that receivers/drivers

tend to return a static value for noise, rather than actually measure

it.

[1] http://en.wikipedia.org/wiki/Thermal_noise#Noise_power_in_decibels

h2. DFS radars meteo

* http://battlemesh.org/BattleMeshV7/Agenda?action=AttachFile&do=get&target=2014-05-17_wbmv7_DFS.pdf

* ETSI EN 301 893 v1.7.0   (2012-01)

** http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.00_40/en_301893v010700o.pdf

* ETSI and Europe http://forum.ubnt.com/showthread.php?t=52560 

* power density and ETSI http://forum.ubnt.com/showthread.php?t=53123 

* "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 

* http://www.etsi.org/deliver/etsi_en/301800_301899/301893/01.07.01_60/en_301893v010701p.pdf

** http://community.ubnt.com/t5/airOS-Beta/Alleviating-the-lack-of-quot-compliance-test-quot/m-p/744726#U744726

* [PATCH 0/4] ath9k: integrate DFS detection http://www.mail-archive.com/ath9k-devel@lists.ath9k.org/msg08370.html

* http://education.meteofrance.com/jsp/site/Portal.jsp?page_id=12060&document_id=21887&portlet_id=53478

* DFS and AirOS 5.5 http://forum.ubnt.com/showthread.php?t=44105&page=8

* Toulouse meteo france 5625 MHz

* http://www.ladepeche.fr/article/2002/10/31/352210-un-radar-meteo-couvrira-le-tarn-et-l-aveyron.html

** radar meteo pres d'Albi lieu dit « Le Puech », commune de Monclar. 

** 5640 MHz ?

* liste des radars en Europe : EUMETNET/OPERA - Radar Network  https://www.eumetnet.eu/wp-content/themes/aeron-child/observations-programme/current-activities/opera/database/OPERA_Database/index.html

** marche plus : http://www.knmi.nl/opera/euradars3.html

<pre>

From: 	Jocelyn Delalande jocelyn.lists2012 at crapouillou.net

Reply-to: 	fai-locaux at fdn.fr

To: 	fai-locaux at fdn.fr

Subject: 	Re: [fai-locaux] Ubiquiti - Support du DFS

Date: 	Sun, 15 Apr 2012 19:12:56 +0200

Mailer: 	Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20120129 Thunderbird/10.0

Au passage, j'ai pu trouver une liste des radars météo en Europe

données en KMZ, présentées sur une carte où dans une interface maison.

http://www.knmi.nl/opera/euradars3.html

La bande qui nous intéresse est la "C band" chaque radar présente des 

contacts administratifs, sa fréquence précise et son rayon d'action 

approximatif. Pratique… Rien ne dit que ça ne soit exhaustif de l'usage 

radar de la bande 5GHzet ça n'enlève rien à la nécessité légale 

d'activer la DFS ceci-dit… Comme disait burban, y'a peut-être du militaire.

Ciao,

Jocelyn

</pre>

h2. Equipe de deploiement

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.

h2. Obsolète

Issue #147

Groupe de suivi manuel par Laurent en attendant

https://www.chiliproject.org/issues/802

* Laurent GUERBY

* Adrien

* bikepunk

* Théo

* Jérémie Dimino

* Sylvain F

* Jocelyn Delalande