Best Unit for Coverage

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Best Unit for coverage

If the signal level legend is required, first perform a quick Polar plot using the signal range options above, and then discard this withoutsaving. This action generates the 'last legend' required for the following coverage plots.

Next select both the 'Save raster data to file' (TXT - and SIG if required) and 'Save coverage pictures in 'Frames' directory' as shown.

http://www.g3tvu.co.uk/Best_unit_for_coverage.htm (2 of 7) [04/11/2009 15:53:26]


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Selecting the PNG box on the 'Save coverage pictures' line causes the saved pictures to be generated in PNG format rater than bmp.The advantage of this is that the picture had a transparent white background allowing it to be exported into Google Earth - if present onyour computer - by a click on its kml file.

On pressing 'Draw', the program will generate a numbered 'Frames' directory your network folder to contain the individual coverage

plots. Each Unit individual coverage pattern will be plotted and stored along with the combined coverage plot, followed by the windowbelow showing the Best Unit for cover at any point on the picture, as indicated by the Unit Background colour.



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The separate coverage pictures can then be opened by looking in the Base Network folder for the 'frames001' folder. This holds filescov0001-cov0003 corresponding to the three individual mobile plots, plus the combined coverage files. Open the first plot, then using

'Edit/Redraw last Legend', and 'Keep in picture' will provide the reference signal legend on the plot if required. This can then be repeatedfor the other two plots, keeping all the plots open.

Finally, placing the cursor at a location of interest on the Best Unit plot allows the saved signal strength coverage pictures to be

displayed to obtain the actual signal levels for each unit at that point.

If the 'SIG' file option has been invoked, the actual signal level at any cursor location can be recalled negating the addition of thepicture legend. On changing plot windows (using Ctrl-Tab or Ctrl-shift-Tab), the associated SIG matrix file has been registered and thesignal level at the same cursor position will be displayed.

Using previous coverage data:



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As an alternative to the above, you could use the Data generated and saved in a previous Multiple Unit coverage plot by clicking on

the 'Load Data' button.

The program will prompt for the location of the previously saved Coverage file (as shown on the Multiple Unit Coverage page) which

can then be loaded.

and produces the following window showing the Best Unit for cover at any point on the picture, as indicated by the Unit Background

colour. Placing the cursor at a location of interest then allows the previous signal strength pictures to be displayed to obtain the actualsignal levels at that point.

http://www.g3tvu.co.uk/Multiple_Unit_Coverage.htmhttp://www.g3tvu.co.uk/Multiple_Unit_Coverage.htmhttp://www.g3tvu.co.uk/Multiple_Unit_Coverage.htmhttp://www.g3tvu.co.uk/Multiple_Unit_Coverage.htm


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Note that if the 'Best Unit' box is checked, and the Draw button pressed, the separate signal coverage plots will be performed, and the

pictures saved in the Frames directory - there will be a 'Combined Signal Coverage' plot also available. Loading the coverage data asabove but without the 'Best Unit' box checked will produce a combined coverage plot - but with a dB legend displayed. So it is worthwhileperforming a 'Rainbow' plot first to obtain this.

The above process can also be carried out on a zoomed area of the map for a 'Detailed Area Coverage' plot.

But also see the Multiple Unit Coverage page!

http://www.g3tvu.co.uk/Multiple_Unit_Coverage.htmhttp://www.g3tvu.co.uk/Cartesian_Style.htmhttp://www.g3tvu.co.uk/Multiple_Unit_Coverage.htmhttp://www.g3tvu.co.uk/Cartesian_Single_Unit.htmhttp://www.g3tvu.co.uk/Radio_Coverage.htmhttp://www.g3tvu.co.uk/Multiple_Unit_Coverage.htm


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Th is page is available in .pdf format here

Please keep checking back for updates/ additions.

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Copyright G3TVU

4th November 2009
http://www.g3tvu.co.uk/Best%20Unit%20for%20coverage.pdfhttp://www.g3tvu.co.uk/Radio_Coverage.htmhttp://www.g3tvu.co.uk/Radio_Coverage.htmhttp://www.g3tvu.co.uk/Best%20Unit%20for%20coverage.pdfhttp://www.g3tvu.co.uk/Single_Polar_Coverage.htmhttp://www.g3tvu.co.uk/Detailed_Area_Coverage.htmhttp://www.g3tvu.co.uk/Fresnel_Coverage.htmhttp://www.g3tvu.co.uk/Interference_Coverage.htm

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Best Unit for Coverage