Datavideo NVW-150 Instruction Manual
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Contents
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17Datavideo Technologies Co., Ltdwww.datavideo.infoHardware Configuration & ConsiderationsThis section will show you how to install the hardware of the NVW-150 / NVW-250 unit and its optional accessories.Antenna SelectionIt is important to remember that antennas create gain by focusing ordirecting signals, this means that for an antenna to provide increasedgain it will be focusing the signal in one direction so we must loosesignal in another direction.A 0dBi Omni-directional antenna creates a perfect spherical responsemeaning that the signal is spread equally in all directions (360 degreevertical and horizontal planes). A standard 3dBi Omni-directionalantenna creates a doughnut shaped response, we have gained signalfrom the side of the antenna at the cost of losing it above theantenna (narrower vertical plane). This effect is increased when wemove to say an 8dBi Omni-directional antenna, we now have a thindisc shaped response (even narrower vertical beam width) making itmore important that both antennas are on the same level ground orangled appropriately.With directional antennas such as a 19dBi panel we narrow both thevertical and horizontal planes to create a highly directional beam.As standard the NVW-250 is fitted with 5dBi Omni directionalantennas for the high power backhaul radio and the secondary radio,the NVW-150 is fitted with 3dBi antennas. These antennas provide awide (almost spherical) signal spread so are ideal for cases when thesecondary radio is to be used as a local access point and the primaryradio is used to link two NVW units over moderate distances without |
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