Fresnel Zones Defines how much clearance you need (yes you need more than simple Line-of-Sight) and for longer links > 3 Km (2 miles) whether you may have a ground clearance problem from our friendly planet. For more info on M. Fresnel and his theories. ![]() Sajna hai mujhe remix download mp3. Jun 6, 2018 - Now HPE subsidiary Aruba Networks is no longer just installing Wi-Fi, but wants to join up the dots for a single networking infrastructure that will. Enter the Total link distance (in Miles or Kilometers), if you do not enter an Obstacle distance (in Miles or Kilometers) the calculator will use the mid-point for all calculations ( Note: assumes antennas at same height). Finally enter the system Frequency in MHz and then click the 'Calculate' button. 1 GHz = 1000 MHz e.g. 2400 = 2.4 GHz. The calculator will generate the radius of the 1st Fresnel zone only (at the obstable point or the mid-point), the 60% (no obstacle) radius and the height of the earth curvature at the mid-point of the Total link distance. Total Link Obstacle Distance 1st Fresnel Zone Radius Km OR Miles Km OR Miles m at Km ft at Miles Frequency 60% No Obstacle Radius MHz m ft Earth Height (mid-point) m ft. System Performance This calculator will give you one of three answers: • If you leave distance blank it will apply the defined SAD factor (or default to 30%) to the Operating Margin and supply the max. Distance (in Km and Miles) at which the Margin operates. • If you enter the distance it will calculate the Operating Margin and the SAD factor. Windows longhorn startup sound download. • If you enter distance but leave RX or TX antenna gain (or both) blank it will apply the chosen SAD factor (or default it to 30% if none supplied) and generate the required antenna power. If both are left blank it will calculate a symmetrical antenna gain. To RESET any parameter above just set to BLANK before clicking 'Calculate' Notes: RX Sensitivity is ALWAYS expressed as a negative dBm (- dBm) and is the lowest power of signal your radio can handle. ![]() Its buried somewhere in your radio spec and will be typically in the range of -80 to -110 dBm. Don't guess or 'fudge' this number. Frequency Distance Result MHz Km OR Miles dB TX Power TX Cable TX Antenna dBm OR mW dBm dB dB RX Sensitivity RX Cable RX Antenna dBm dB dB dB Margin RX Power SAD Factor Theoretical Margin dBm% dB.
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АвторНапишите что-нибудь о себе. Не надо ничего особенного, просто общие данные. Архивы
Март 2019
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