The '''Minimum Required SNR''' parameter is used to determine link connectivity between each transmitter and receiver pair. If you check the box labeled '''Generate Connectivity Map''' in the receiver set property dialog, a binary map of the propagation scene is generated by EM.Terrano, in which one color represents a closed link and another represent no connection depending on the selected color map type of the graph. EM.Terrano also calculates the '''Max Permissible BER''' corresponding to the specified minimum required SNR and displays it in the receiver set property dialog.
=== A Note on EM.Terrano's Native Dipole Radiators ===
When you define a new transmitter set or a new receiver set, EM.Terrano assigns a vertically polarized half-wave dipole radiator to the set by default. The radiation pattern of this native dipole radiators is calculated using well-know expressions that are derived based on certain assumptions and approximations. For example, the far-zone electric field of a vertically-polarized dipole antenna can be expressed as:
<math> E_\eta(\theta,\phi) = j\eta_0 I_0 \frac{e^{-jk_0 r}}{2\pi r} \left[ \frac{cos \left( \frac{k_0 L}{2} cos \theta \right) - cos \left( \frac{k_0 L}{2} \right) }{sin\theta} \right] </math>
=== A Note on the Rotation of Antenna Radiation Patterns ===