L-Acoustics V-DOSC, Operator'S Manual

Page: 68 / 158

L-ACOUSTICS V-DOSC Manual Version 4 6/29/2005 Page 68 of 158
Note: The calculation of elevation Z2 is susceptible to errors in distance measurements and should always
be verified with a tape measure or laser rangefinder whenever possible. Combined distance/angle
measurements are typically more accurate than distance only measurements when calculating Z2.
Figure 46: Parameters for the ROOM DIM Utility Sheet in ARRAY
XZ cells can be used to enter additional room features such as balcony profiles, stage/proscenium
details, FOH mix position, etc.
In V-DOSC V-ARRAY1 or V-ARRAY2 cells, the designer enters the number of V-DOSC enclosures
(16 maximum), the offset distance (in the x dimension), elevation of the bumper and the autofocus
adjust angle. Normally, ARRAY 2004 automatically focuses the top V-DOSC enclosure to the rear of
the audience geometry defined in Cutview 1. Autofocus adjust can be used to adjust the overall focus
of the array and DOES NOT CORRESPOND TO THE TILT ANGLE OF THE V-DOSC BUMPER.
For safety reasons, the maximum upward tilt angle for the array (given by Site #1 to next) is
approximately 5 degrees. Results of detailed mechanical load calculations are displayed in the
MECHANICAL DATA cells in ARRAY 2004 software to determine exact array tilt angle limits.
NOTE: Always refer to the MECHANICAL DATA cells in ARRAY 2004 to verify that safe rigging conditions
apply with respect to load distribution.
The designer then chooses the angular spacing between enclosures from the available values in the
pull down menu (0.75°, 1.3°, 2°, 3°, 4°, 5.5°). The red lines show the aiming directions of all
enclosures, where each line is aligned with the bottom of its respective enclosure. Note that the
displayed top block corresponds to the V-DOSC bumper, not the first enclosure of the V-DOSC
array.
dV-DOSC downfill or upfill enclosures can be conveniently simulated in V-ARRAY1 or V-ARRAY2
sheets using the available cells.
Note: For dV-DOSC downfill simulation, autofocus adjust angle = 0 degrees corresponds to the first dV-
DOSC enclosure as tightly wrapped to the bottom V-DOSC (i.e., a relative site angle of 3.75 degrees).
For dV-DOSC upfill simulation, an autofocus adjust angle of zero degrees corresponds to the first dV-DOSC
enclosure as parallel to the site angle of the top V-DOSC. To obtain the 0 degree relative angle, the 3.75
degree hole on dV-ANGLEP1 must be used ruring installation. For upfill purposes, the 5.5 or 7.5 degree
holes can also be selected on dV-ANGLEP1. When using 5.5 or 7.5 degree holes, set autofocus adjust =
1.75 degrees or 3.75 degrees, respectively. This is necessary to compensate for the 3.75 degree trapezoidal
angle of the first dV-DOSC enclosure.