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Содержание RoamAbout 802.11

Страница 1: ...9033153 RoamAbout 802 11 Outdoor Antenna Site Preparation Guide ...

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Страница 3: ...SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES Copyright 1999 by Cabletron Systems Inc 35 Industrial Way Rochester NH 03867 All Rights Reserved Printed in the United States of Amer...

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Страница 5: ... antenna range 5 Required Data for Antenna Installation Company 6 The Fresnel Zone 6 Other Considerations 8 Antenna Options 9 RoamAbout 14 dBi Directional Antenna 9 RoamAbout 7 dBi Omni Directional Antenna 13 Verify Component Connector Polarity 15 Reviewing the Site Preparation Checklist 16 For Additional Assistance 17 Table of Contents ...

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Страница 7: ...AN from building to building Use the RoamAbout outdoor antenna as a solution when connecting buildings across distances as an alternative to costly T1 leased lines Before you start the installation process ensure that all the requirements described here are met NOTE If after reviewing this document you require additional technical information or support prior to ordering product see the RoamAbout ...

Страница 8: ... must be connected to the same ground The antenna and the mounting structure require a separate earth ground connection Check with a certified antenna installer to make sure the antenna is properly grounded Line of sight Spread spectrum systems for LANs are complete point to point systems and require a clear line of sight from location to location Zone widths of the beam depend on the distance bet...

Страница 9: ...to achieve a line of sight if you are mounting it on the wall of a building Note The installer is responsible for local building codes Line of sight is defined as No obstacles in the direct path between the two antennas No obstacles within a defined radius around the antenna beam Clear of neighboring buildings trees power lines and other obstructions ...

Страница 10: ...Site Preparation Guide 4 Figure 2 Potential Obstacles to Line of Sight not to scale Power lines blocking line of sight Building blocking line of sight Trees blocking line of sight 100_02 ...

Страница 11: ...ded parking lots water moist earth moist vegetation and above ground power or telephone lines Because surrounding objects such as trees power lines other antennas and the like seriously reduce efficiency of the antenna it is very important to mount the antenna as high and clear of obstacles as possible Ensure that the cable between the antenna and lightning arrestor is at least 3 feet 0 9 meters a...

Страница 12: ...lost resulting in reduced performance For optimal performance you must ensure that the antenna products you choose in combination with the height of the antenna installation above ground will provide sufficient clearance to allow your antenna installation to cover the distance between the two wireless sites As shown in Figure 4 there are two major variables that determine the shape of the Fresnel ...

Страница 13: ...uired for your installation as defined by the distance between the antennas Distance Between Antennas 1 Minimum Clearance Required 2 kilometers miles meters feet 2 1 1 3 5 8 19 1 3 5 2 2 7 8 25 7 6 5 4 0 11 1 36 5 9 6 6 0 14 4 47 4 2844 01 03A 1 2 R o a mA b o u t 1 2 R o a mA b o u t Cable Length A Cable Length B ...

Страница 14: ...cs make it more difficult to aim the antennas and or adjust antenna alignment to optimize the performance of the wireless point to point link With these points in mind the design of antennas and components supplied with the RoamAbout Outdoor Kit are based upon the following principles An output power and antenna gain that comply with the maximum limits as defined by local governing bodies concerni...

Страница 15: ...a for the 2 4 GHz frequency band The antenna is a totally enclosed 16 element Yagi designed for point to point communications It has a typical VSWR of 1 5 1 and is less than 2 1 over the entire frequency band The gain is 14 dBi and the half power beamwidth is 30 degrees This antenna is normally mounted on a mast and is vertically polarized ...

Страница 16: ... Female France Standard N Female Japan Standard N Female Electrical Frequency Range 2 4 GHz VSWR Less than 2 1 1 5 1 Nominal Nominal Impedance 50 Ohms Gain 14 dBi Front to Back Ratio greater than 20 dB Half Power Beamwidth 3dB Vertical E plane 30 8 Degrees Horizontal H plane 31 4 Degrees Polarization Linear Vertical or Horizontal Antenna Environment Operating Temperature 60 C 140 F 40 C 40 F Wind ...

Страница 17: ...figuration Antenna 1 OUTDOOR INDOOR Access Point 5 Adapter Card 6 Pigtail Connection 4 Ground Strap Lightning Protector 7 Low Loss Cable 2 Cabletron Systems Wall Mount Enclosure 3 Ethernet Connection Power Connection Power Transformer included with Access Point ...

Страница 18: ...by Domain FCC ETSI France Spain Japan OUTDOOR ANTENNA KIT Contents CSIEB AA CSIEB AB CSIEB AF CSIEB AJ 1 Antenna CSIES AA Y14 CSIES AB Y14 CSIES AB Y14 CSIES AB Y14 2 50 Low Loss Cable CSIES AA C50 CSIES AB C50 CSIES AB C50 CSIES AB C50 3 Wall Mount Enclosure CSIAP WM CSIAP WM CSIAP WM CSIAP WM 4 Pigtail Connection CSIES AA PT50 CSIES AB PT50 CSIES AB PT50 CSIES AB PT50 5 Access Point CSIAP CA CSI...

Страница 19: ...hanical Size 45 7 cm 18 in Mounting method Clamps to vertical mast with outside diameter up to 51mm 2 in Cable Type RG 58A U 50 ohm low loss coax Length 15 cm 6 in Color White Connector FCC Countries Reverse Polarity N male ETSI Countries Standard N female France Standard N female Japan Standard N female Electrical Frequency Range 2 4 GHz VSWR Less than 2 1 Nominal Nominal Impedance 50 Ohms Gain 7...

Страница 20: ...50 ft or 22m 75 ft 3 Wall Mount Enclosure 4 Pigtail Connection 5 Access Point 6 Adapter Card 7 Lightning Protector OUTDOOR INDOOR Access Point 5 Adapter Card 6 Pigtail Connection 4 Ground Strap Lightning Protector 7 Low Loss Cable 2 Wall Mount Enclosure 3 Ethernet Connection Power Connection Power Transformer included with Access Point Antenna and Cable 1 ...

Страница 21: ...t applies to your country ETSI Countries France Spain and Japan FCC Countries A 1 PC Card connector 1 PC Card connector 2 Standard N Male 2 Reverse Polarity N Female B Standard N Female on both ends Reverse Polarity N Male on both ends C Standard N Male on both ends Reverse Polarity N Female on both ends D Standard N Female Reverse Polarity N Male NOTE The term Male or Female does not refer to the...

Страница 22: ...mple 20 feet of mast requires six guy wires Line of sight Determine the mounting location for the antenna Ensure that the back of the antenna is clear Ensure that remote and local antennas can see each other Ensure that no obstacles are in the direct path or within the defined zone of the two sites Consider whether any RF interference is present Installation Requirements Determine the best locatio...

Страница 23: ... Wide Web http www cabletron com http www cabletron com wireless Phone 603 332 9400 Internet mail http www cabletron com support forms email support form FTP ftp ftp cabletron com Login anonymous Password your email address To send comments or suggestions concerning this document contact the Cabletron Systems Technical Writing Department via the following email address TechWriting cabletron com Ma...

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