Rigging Dv-Dosc Under V-Dosc With Dv-Down - L-Acoustics dV-DOSC Operator's Manual

Under daylight conditions (outdoors), the trim angle can be visually checked from the rearmost
audience section. If the gap between the top and second enclosures is clearly visible then the focus is
correct. At long distances, binoculars can help to visualize this gap and for final angle adjustments, a
pair of radios is useful while one person walks the room and visually inspects the array while a second
person operates the motors. Alternatively, a digital inclinometer with remote display of array tilt angle
(example: Lucas Control Systems Model 0256-01 or Rieker RAD2-70-B2) can be placed on top of the
array and used to set the array tilt equal to the value calculated for Site Angle #1 in ARRAY 2004 or
SOUNDVISION.
Verifying coverage down front is more difficult since the trapezoidal angle of dV-DOSC cannot be
used as a reference. If you can see the bottom of the bottom dV-DOSC you are definitely outside the
coverage pattern (more so than for V-DOSC). Attaching an extra dV-ANGLE at the rear of the
bottom cabinet at 3.75 degrees and using this as a site reference with the front rigging post can help
avoid this problem.
Use the above described techniques to verify that L and R arrays are matched (plus L-L and R-R
arrays, if installed). Walk to the back of the venue and by looking at the gaps between cabinets of each
array, visually confirm that L and R are matched as you walk forwards toward the system.

Rigging dV-DOSC under V-DOSC with dV-DOWN

Typically, 3-4 dV-DOSC are recommended for flying under V-DOSC for downfill applications and the
maximum number of dV-DOSC that can be flown under V-DOSC is 6. In most cases, dV-DOSC
enclosures will be used at the maximum angle between cabinets, i.e., 7.5 degrees, and the enclosures
will be tightly wrapped according to the trapezoidal angle of the enclosures (although selecting
3.75/5.5/7.5 degrees tends to provide the best site angle impact spacing transition).
Standard rigging procedures for V-DOSC are followed (please see the V-DOSC manual for complete
details). Fly the V-DOSC array in the normal manner but do not connect the angle straps of the
bottom V-DOSC enclosure. Flip down the rotating legs (balanciers) of the bottom V-DOSC enclosure
in preparation for attachment to dV-DOWN.
Remove the FLIGHT-dV case cover and wheel 3 dV-DOSC into position (face down). As a reference
for cabinet orientation, the logos will be in the correct orientation and the bottom rigging tabs
pointing down once the system is flown. Pin the fronts of all dV-DOSC together using dV-PIN25 (four
required).
Pre-attach pairs of dV-ANGLE bars at the rear of all dV-DOSC enclosures of the array. Remember to
keep the ball end of dV-ANGLE up as a reference and be careful to select the correct angle. Typically,
for downfill applications the 7.5 degree position (minimum hole separation) will be selected to
produce a tightly wrapped array for maximum vertical coverage.
Connect the rears of all 3 dV-DOSC enclosures while they are still face down in their flight cases by
pulling the cabinets together at the rear and inserting dV-PIN25. This operation is facilitated by the
fact that all fronts are pinned together and can pivot, plus all rear angles were pre-attached in the
previous step.
Attach L/R dV-DOWN rigging adapters to the top enclosure using four dV-PIN81.
Loosen the screwjacks on dV-DOWN so that they do not interfere while dV-DOWN is attached to
the V-DOSC rotating legs. Since the angle strap for the bottom V-DOSC has not been attached, this
helps to facilitate alignment of the holes on the rotating legs with the corresponding holes on dV-
DOWN (when the holes are aligned, the V-DOSC rotating leg will be oriented vertically). Once
aligned, attach dV-DOWN to the V-DOSC rotating legs using two U-PINS. Install the locking safety
pins on the U-PINS.
Proceed to raise the system. The dV-DOSC enclosures will automatically lift off from the flight case.
Fly the system until dV-DOSC is floating above floor level.
At this point the angle straps for the bottom V-DOSC enclosure can be connected, i.e., one person on
either side can lift the bottom V-DOSC cabinet upwards and attach the angle strap on each side.
121
dV-DOSC dV-SUB Manual V3.0 June 2005