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Multiple Unit Coverage
I can be contacted at E-mail address:- [email protected]
To demonstrate the case where multiple units are selected on the
Cartesian Coverage pane, the 'Mobile' Unit from my Base network has
beenrelocated and two additional 'Mobile 2' and 'Mobile 3' units
have been positioned on the Base.net road map as below:
Next, the Cartesian Coverage pane is opened, where the three
'Mobile' Units are selected for the plot, using the Hand Held Unit
as the mobile unit (tobe used as the moved reference), and the Base
Network selected. At this stage it is possible to select the
Background colour to represent these fixedunits (for Best Unit
plots), which is also shown on their labels. The 'Save raster data
to file (TXT)' and optionally 'Save raster data to file
(SIG)'checkboxes have also been set to make the plot information
available later without repeating the calculations, and 'Save
coverage pictures in Framesdirectory' to save the individual
coverage plots. The individual plots will be saved in bmp format
unless the 'PNG' box is checked - this format is suitablefor export
to Google Earth from the klm file which is available in the Frames
folder generated, as the white background is transparent.
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By using the 'Save raster data to file (SIG)' option, a signal
level matrix (*.sig) file will be generated during the plotting
process. This file thenprovides a calculated signal level readout
at the cursor location for the whole plot. The information location
can be seen Here.
Clicking on Draw causes the three coverage plots to be drawn and
saved, plus the 'Combined best signal available' plot which is held
on screen and
can be saved as a new picture. This prompts the saving of the
Coverage Data file to a selected location. These coverage plots
will have a *.sig fileassociated and saved with them if
selected.
At any time during a plot, pressing the 'Space Bar ' will pause
the calculations, whilst pressing the S key will change calculation
rate to Slow,enabling the machine to perform other operations
whilst plotting. Both these actions generate a message on the lower
data bar. If the 'Completed.wav'box is checked, this will sound as
a warning sound at the end of the plot.
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The resulting plot is as below.
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where the high local signal levels around all the Mobile Units
can be clearly seen.
The individual plots for each Unit can be recovered Using
'File/Open Picture' (or the toolbar icon), and navigating to the
latest numbered'Frames' directory in the Network folder.
For the 'Mobile' Unit:
Then by invoking 'Edit/Redraw last legend', the previous signal
strength legend can be added to the plot if required and kept
inpicture. If the 'SIG' file option has been invoked, the actual
signal level at any cursor location can be recalled. On changing
plot windowsthe associated SIG matrix file has been registered and
the actual signal level data at the cursor position will be
shown.
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For the 'Mobile 2' Unit, with legend added:
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For the 'Mobile 3' Unit with legend added:
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For any area of interest on the Combined coverage picture, a
click at the location generates the cursor cross wires, and by
cyclingthough the coverage panes the best signal strength and Unit
can be determined for this location.
Signal strength data at the cursor crosswire location is
highlighted in the red box:
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The above process can also be carried out on a zoomed area of
the map for a 'Detailed Area Coverage' plot.
To see how to re locate the signal st rength legend click
Here
But also see the Best Unit page Next!
Th is page i s available in .pdf fo rmat here
Please keep checking back for updates/ additions.
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Top o f P age
Return to Radio Coverage
Copyright G3TVU
4th November 2009
http://www.g3tvu.co.uk/Radio_Coverage.htmhttp://www.g3tvu.co.uk/Radio_Coverage.htm
