(From Ian G3TVU Quick Start
plot over an area is produced between a wanted and
interfering station, where the minimum signal level and interference
margin can be selected and plotted as required.
A click on the toolbar Icon
Or by opening 'Tools
> Radio Coverage > Interference', the following
pane will open, where the wanted and interfering units are selected,
and the interference margin defined for acceptable communications. The
Mobile Unit has been moved to the top of the map for these plots, and
is used as the unwanted 'Interferer' with communications between the
Base and Hand Held Units.
Where pressing 'Draw' produces this plot:
The Red areas showing that the Mobile Unit exceeded the margin
in these locations with the Hand Held Unit, and green areas where the
margin was acceptable, with Base to HH Unit communications
Invoking the 'Swap' button, reverses the roles of wanted and
interfering Units, and will show the areas where acceptable
communications between the Mobile and HH Units can be
Clicking on 'Draw' then produces:
It should be noted that the swept 'Mobile receive Unit'
selected above, is always treated as if it has an 'Omni antenna',
regardless of its Network Antenna setting! The two transmitting Units
can have gain antennas specified, and the characteristics applied to
Where it is required to accurately determine the Signal to
Interference level in a Network having gain antennas, the Radio Link
pane should be used.