=== Defining a Transmitter Set ===
Transmitters act as sources in a propagation scene. A transmitter is a point radiator with a fully polarimetric radiation pattern defined over the entire 3D space in the standard spherical coordinate system. By default. , EM.Terrano assumes that your transmitter is a vertically polarized half-wave resonant dipole antenna. This antenna has an almost omni-directional radiation pattern in all azimuth directions. It also has radiation nulls along the axis of the dipole. You can override the default radiator option and select any other kind of antenna with a more complicated radiation pattern. For this purpose, you have to import a radiation pattern data file to EM.Terrano. You can model any radiating structure using [[EM.Cube]]'s other computational modules, [[EM.Tempo]], [[EM.Picasso]], [[EM.Libera]] or [[EM.Illumina]], and generate a 3D radiation pattern data file for it. The far-field radiation patter data are stored in a specially formatted file with a "'''.RAD'''" file extension. This file contains columns of spherical φ and θ angles as well as the real and imaginary parts of the complex-valued far-zoned electric field components '''E<sub>θ</sub>''' and '''E<sub>φ</sub>'''. The θ- and φ-components of the far-zone electric field determine the polarization of the transmitting radiator.
{{Note|By default, EM.Terrano assume a vertical half-wave dipole radiator for your transmitter set. The radiation pattern data file of this radiator is called "DPL_STD.RAD" and it is located in inside the "EMAG → Models" sub-folder under the Documents folder.}}
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<td> [[Image:Terrano L1 Fig11.png|thumb|left|480px|The transmitter set definition dialog.]] </td>
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Once you define a new transmitter set, its name is added in the '''Transmitters''' section of the navigation tree. The color of all the base points associated with the newly defined transmitter set changes , and an additional little ball with the transmitter color (red by default) appears at the location of each associated base point. You can open the property dialog of the transmitter set and modify a number of parameters including the '''Baseband Power''' in Watts and the broadcast signal '''Phase''' in degrees. The default transmitter power level is 1W OR 30dBm. There is also a check box labeled '''Custom Power''', which is checked by default. In that case, the power and phase boxes are enabled and you can change the default 1W power and 0° phase values as you wish. [[EM.Cube]]'s ".RAD" radiation pattern files usually contain the value of "Total Radiated Power" in their file header. This quantity is calculated based on the particular excitation mechanism that was used to generate the pattern file in the original [[EM.Cube]] module. When the "Custom Power" check box is unchecked, EM.Terrano will use the total radiated power value of the radiation file for the SBR simulation.
{{Note|In order to modify any of the transmitter set's parameters, first you need to select the "User Defined Antenna" option, even if you want to keep the vertical half-wave dipole as your radiator.}}
=== Defining a Receiver Set ===
[[File:PROP21(1).png|thumb|400px|EM.Terrano's preliminary Receiver dialog.]] [[File:PROP22.png|thumb|400px|EM.Terrano's Receiver dialog with an isotropic radiator selected.]] Receivers act as observables in a propagation scene. The objective of a SBR simulation is to calculate the far-zone electric fields and the total received power at the location of a receiver. In that sense, receivers indeed act as field observation points. You need to define at least one receiver in the scene before you can run a SBR simulation. You define Similar to a transmitter, a receiver is a point radiator, too. However, unlike the receivers of transmitter case, EM.Terrano assumes that your scene receiver, by associating them with the base sets you have already defined default, is an isotropic radiator. An isotropic radiator has a perfect omni-directional radiation pattern in all azimuth and elevation directions. An isotropic radiator doesn't physically exist in the project workspacereal world. Unlike transmitters that usually one or fewBut the assumption of a default, polarization-matched, isotropic receiver is a convenient choice to generate received power coverage maps of a typical propagation scene may involve a large number of receivers. To generate You might also define a wireless coverage mapcomplicated radiation pattern for your receiver set. In that case, you need to define an array import a radiation pattern data file to EM.Terrano. Note that you can simply use the data file "DPL_STD.RAD" for that purpose, which is also used by EM.Terrano for the definition of points as your base setthe default vertical half-wave dipole transmitter.
To define a receiver observable in {{Note| EM.Terranoreceivers, follow the procedure below:by default, are defined as polarization-matched isotropic radiators.}}
* Right-click on Similar to transmitter sets, you define a receiver set by associating it with an existing base location set in the '''Receivers''' item of the navigation tree and select '''Insert New Receiver Setproject workspace...''' from the contextual menu. This opens A typical propagation scene contains one or few transmitters but usually a large number of the preliminary Receiver Set dialogreceivers.* Choose To generate a name and for wireless coverage map, you need to define an array of points as your receiver base location set. * From the dropdown list labeled '''Associated Base point Set''', select the desired set.* Click the {{key|OK}} button of the dialog to close it.
A new receiver set entry is added in the [[Image:Info_icon.png|40px]] Click here to learn how to define a '''Receivers[[Glossary of EM.Cube's Simulation Observables#Receiver Set | Receiver Set]]''' section of the navigation tree. After defining a receiver set, the base points associated with it change their color to the receiver color, which is yellow by default. The first element of the set is represented by a larger ball of the same color indicating that it is the selected receiver in the scene.
<table><tr><td> [[Image:Terrano L1 Fig12.png|thumb|left|480px|The Receiver Set Dialog receiver set definition dialog.]] </td></tr></table> Once you define a new receiver set, its name is also used to access individual receivers added in the '''Receivers''' section of the navigation tree. The color of all the base points associated with the newly defined receiver set for data visualization changes, and an additional little ball with the receiver color (yellow by default) appears at the end location of a simulationeach associated base point. At You can open the end property dialog of an SBR simulation, the button labeled "Show Ray Data" becomes enabled. Clicking this button opens the Ray Data Dialog, where you can see receiver set and modify a list number of all the received rays at the selected parameters. <table><tr><td> [[File:Terrano L1 Fig14.png|thumb|left|480px|The property dialog of a receiver and their computed characteristicsset. ]]</td></tr></table>
At the end of an SBR simulation, the button labeled {{Notekey| EMShow Ray Data}} becomes enabled.Terrano receiversClicking this button opens the Ray Data dialog, by default, are defined as isotropic or polarization-matched radiatorswhere you can see a list of all the received rays at the selected receiver and their computed characteristics.}}
If you want directional radiators for your receiver set, you need to open the Receiver dialog by right-clicking on the receiver set's name in the navigation tree and opening its property dialog from the contextual menu. In the "Radiator Properties" section of this dialog, select the '''User Defined''' radio button. Similar to the case of transmitter set, you can import a '''.RAD''' radiation pattern file using the {{key|Import Pattern}} button. You can also rotate the imported radiation pattern by setting '''Rotation Angles''' different than the default zero values.