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VARI-directional array
6.4
VARI configuration procedure
The red rectangle represents the line array: a base unit only, or a base unit with one or two
extension units attached. Next open the Control parameters window by clicking on the icon
for the VARI configuration being installed.
6.4.1
Control parameters
The Control Parameters window has eight pages (selected by the top tab set); only the first,
Beam, is required for setting the primary system parameters. Ensure that the Geometry tab at
the bottom of the window is selected.
Figure 6.5: Geometry and Results panes
The five Geometry settings in the top pane represent the physical dimensions relating to the
VARI's installed position. The parameter values are simply entered by moving the on-screen
slider controls. The ranges of available adjustment for some parameters varies with the
loudspeaker configuration and are given in section Ranges of adjustment, page 34. The Results
display in the bottom pane shows the predicted performance of the VARI array, and changes
in real time to reflect the values of the physical parameters. Two versions of the Results
display are available, selected by the two buttons above the diagram. Coverage shows an on-
axis, vertical cross-section through the sound field ('On-axis' means that the cross-section is
perpendicular to the vertical centre line of the array.). The loudspeaker position is on the left-
hand vertical axis, the vertical line represents the vertical position of the loudspeaker (with
the '0'-reference at ear level on the start position!) and the horizontal line the coverage zone,
between Start and End distances. The predicted sound field in front of the array is colour-
coded to show SPL (Sound Pressure Level), with a key relating colour to dBs on the right. The
thin straight line superimposed on the coverage plot indicates the ear level as specified by the
currently-set parameter values. Right‑clicking in the window pops-up a selection box that
allows to select a plot and copy it to the Windows clipboard, e.g. to paste it into a
word‑processing file for project documentation. The five parameters to have their values
entered are defined in the next table:
Mounting
height
Bosch Security Systems B.V.
This is the mounting height of the loudspeaker, and is measured vertically
from floor level to the bottom of the base unit. The height is selectable in
increments of 0.1 m.
Installation manual
Configuring the VARI | en
2018.06 | V1.3 |
33
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