TRANSMITTER RADIO PARAMETER
All radio parameters of the transmitter or sector (mobile services) are configured by default when selecting the service (technology) of the study, with suitable or typical values of the simulation type to performed. Obviously values such as transmission power or wire losses and passive elements must be specified by the user, particularizing for the actual case to simulate.
In the same way to the links ends, with this window the user can modify these values according to their needs.
•Antenna. Defined from its radiation pattern. Clicking it is possible to access the antenna configuration window.
•Antenna height. Height of the radiating system used.
•Azimuth. Horizontal pointing, in degrees, of the transmitting antenna (possible range from 0º to 359º).
•Mechanical downtilt. Vertical mechanical pointing, in degrees, of the transmitting antenna (possible range from -90º to 90º). Positive values represent an antenna tilt down, negative values represent a tilt up.
•Electrical downtilt. Vertical electrical pointing, in degrees, of the transmitting antenna (possible range from -90º to 90º). Positive values represent an antenna tilt down, negative values represent a tilt up
•Transmission frequencies. Emission frequency. Xirio configures by default the reference frequency of the selected service. The user can modify this frequency.
•Feeder, length and losses.
•Polarization. Orientation of the electromagnetic field radiated from the transmitting antenna. The user can choose between horizontal, vertical, circular or cross.
•Losses. Due to passive elements such as connectors, cables, diplexers, etc.., except for feeder losses previously contemplated.
•Power. Emission Power of the transmitter
Heights in Xirio can be defined with respect to:
•Roof level, equivalent to the height of the radiant system mast above the building
•Ground level, equivalent height from the street ground.
If the “Terrain level” option is selected, it will not be necessary to configure the other two options. If you select "Roof level" you can:
•Define a building height
•Force it to read the height of the DEM layer being used.
In addition, if there is a DEM layer, the user has a tool to calculate the height of the building in the coordinates of the transmitter or sector.
SPECIFIC PARAMETERS FOR EACH TECHNOLOGY
Some technologies require the use of specific parameters in the transmitter, as: fixed service, digital broadcasting (SFN networks), DVB-T2 digital broadcasting (SFN networks), and 3G and 4G mobile services.
It is possible to consult all parameters to configure in Link page.
Digital broadcasting (SFN networks)
In addition to parameters common to all technologies, the transmitters of SFN digital broadcasting networks include the parameter Delay. This parameter sets the timing of each transmitter relative to a time base that the user can set at their criteria. From that time base, positive delay will delay contents transmission while the negative delay will mean an advance of such transmission.
Mobile services of third and fourth generation
When the transmitter (sector) belongs to a mobile third or fourth generation service, the sector radio parameters contain a set of extra parameters called CDMA parameters or LTE parameters which allow to comute simplified simulations of these services.