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==Getting Started==
== Defining the Transmitter & Receivers ==
For this tutorial lesson, use the Basic Link Wizard to create a vertically polarized half-wave dipole transmitter and a grid of isotropic receivers. Set the Grid Extents equal to 800m, and keep the default values of the other parameters, <i>i.e.</i>, a transmitter height of 10m, receiver height of 1.5m and receiver spacing of 5m. The transmitter base location point radiator associated with the transmitter called "TXP" is originally positioned at (0, 0, 10m). Change its coordinates to (100m, 100m, 10m). At this time the transmitter is hidden under the terrain, and so are a large number of receivers.
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<td> [[Image:TER L6 TxProp.png|thumb|left|360px600px|Adjusting transmitters to terrain elevation in the transmitter set dialog.]] </td></tr><tr><td> [[Image:TER L6 RxProp.png|thumb|left|360px600px|Adjusting receivers to terrain elevation in the receiver set dialog.]] </td>
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{{Note|The Z-coordinate of a transmitter or a receiver located above a terrain surface is adjusted to the sum of its original height and the terrain elevation at its base location.}}
To get a better view of the relative position of the tranmsitter transmitter and receivers and their corresponding base location pointspoint radiators, click the <b>Right View</b> [[Image:View-right tn.png]] button of the View Toolbar to see a side view of your propagation scene.
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Now open the simulation run dialog and click the {{key|Settings}} button next to the simulation engine type drop-down list. This opens up [[EM.Terrano]]'s Ray Tracing Engine Settings dialog. Uncheckmark "Include edge diffraction" checkbox and a new SBR analysis. You will see that there is no reception behind the buildings. <table><tr><td> [[Image:TER_L6_DiffA.png|thumb|left|480px|EM.Terrano's Run Simulation Dialog..]] </td></tr><tr><td> [[Image:TER_L6_DiffB.png|thumb|left|600px|EM.Terrano's Ray Tracing Engine Settings dialog.]] </td></tr><tr><td> [[Image:TER_L6_Map1_Diff.png|thumb|left|720px|The received power coverage map of the plateau terrain scene with the transmitter base at X = Y = 100m and Z = 10m without edge diffraction.]] </td></tr></table> To improve the reception, you can bring the transmitter to the edge of the plateau. Keep in mind that to move a transmitter or receiver, you need to move their associated based point sets. Change the coordinates of the base point "TXP" to X = Y = 30mm. Keep the original Z-coordinate of 10m. Now Make sure to checkmark "Include edge diffraction" checkbox and run a new SBR analysis of the scene and visualize its coverage map. You will see that the valley region now gets considerable reception.
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|-
| Total Number of Edges
| 3947,680124
|-
| Total Number of Receivers
|-
| Total Number of Transmitted Rays
| 6440,980500
|}