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Published byEarl Guye Modified over 9 years ago
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FSO Installation Free Space Optics The Practical Aspect
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2 The Path to a successful IR link Site survey Choosing the right product Design for safe (worst case) margins Perform a clean “by the book” installation Test end-to-end link connectivity
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Preparation
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4 Performing the Site Survey 1.Choose a mounting location 2.Confirm line of sight (Site A to Site B) 3.Note where fiber and power should terminate 4.Determine link range using GPS or other methods 5.Photograph the site 6.Go to Site B and repeat steps 1-5 7.Complete the site survey check list (Site Survey Form)
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5 Choose A Mounting Location
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6 Line of sight Clear line-of-Sight Atmospheric disturbances dust clouds smoke large vehicle traffic (fumes) Physical obstacles Moving objects (cranes etc.) Trees Birds Nesting
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7 Line of sight With chimneys
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8 active Chumminess Link Location
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9 Site Survey Scintillation Sources Air conditioning units Long, hot, rooftops Smokey chimneys Heavy traffic exhaust fumes Metal Roofing
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10 Long, hot, rooftops Long hot roof can cause scintillations NetLight Unit
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11 Long, hot, rooftops Long metal roof can cause heavy scintillations during summer time And can affect the traffic. The NetLight should be higher at list 15feet above the roof
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12 Long, hot, rooftops Better location to mount the NetLight
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13 Long, hot, rooftops Are you crossing this roof?
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14 Air conditioning units Point B (Bad location) Point A (Good location)
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15 Air conditioning units Vibrations Stable mount Wind Compressors Elevators Traffic Building Sway Wooden buildings Earthquake buildings
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16 Site Survey Windows and East-West Links Windows 4% light reflection from each surface 15% loss from a double pane window Tinted windows increase attenuation NetLight should be placed at an angle greater than 1 and never more than 45 away from perpendicular to the window. Green, gray, brown and mirror window are not recommended because of very high attenuation East-West links Errors if 0.5 sun disk overlaps the NetLight Only for a few days a year Only for a few minutes each day Note: When transmitting trough window it important to notify the customer that From time to time the link can be blocked by the window cleaner elevator
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17 Transmit Trough Window Drawing
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18 Transmit Trough Window Picture Taking off part of the window coating Marking for the window cleaners
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19 Photograph The Site Photograph the location Spot alternative mounting locations (if necessary) Photograph the line-of-sight ( From the NL final height) Photograph the overall roof top Photograph the under line terrain
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20 Bad Line Of Sight Example
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21 Installation
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22 Rooftop Mounting Four types of Mounts Wall pedestal mounts Floor pedestal mounts Extended wall mounts Pole clamps mounts
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23 Wall Pedestal Mount. Wall Pedestal Mount. Used when the link needs to be elevated above the top of the wall. M054C - 10 inches from base plate M053C - 22 inches from base plate M022C – 34 inches from base plate
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24 Floor Pedestal Mount Reinforced Floor Pedestal Mount. Similar to the Standard Floor Pedestal. M015C - 47 inches (concrete) M059C - 47 inches (Indoor) M058C - 34 inches (Indoor) M050C – 34 inches (concrete) M055C - 22 inches (concrete) M057C - 22 inches (Indoor)
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25 Extended Wall Mount Extended Wall Mount. Used when a standard wall pedestal mount is insufficient to clear obstacles or for applications requiring an extension from the wall for better access to the transceiver. M064C - 12 inches (metal for PCL) M051C - 22 inches (concrete) M056C - 34 inches (concrete) M062C - 22 inches (metal) M063C - 34 inches (metal)
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26 Pole Clamp Example
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27 Pole Clamp Example
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28 Side Walk Concrete slabs place on the roof
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29 Side Walk Concrete slabs place on the roof
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30 Side Walk Concrete slabs place on the roof
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31 Pre Made Concrete slabs on the roof
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32 NetLight Installed on a self Support Tower Local Made Mount Bracket
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33 Examples
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34 Bad Finished Installation
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35 Bad Finished Installation
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36 Bad Finished Installation
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37 NetLight 155-5400
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38 Finished Installation Junction Box 4 Links On One Roof Top
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39 Finished Installation Back To Back HOP installation Junction Box
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40 Finished Installation
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Thank you
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