Control Signal Distribution - L-Acoustics dV-DOSC Operator's Manual

1.7 CONTROL SIGNAL DISTRIBUTION

The control signal distribution architecture adopted for V-DOSC and dV-DOSC allows maximum
flexibility while providing a scaleable approach that can be used for small, medium and large systems.
Let's consider a large system application in detail since small and medium systems will adhere to the
same MULTI line assignment standards and are considered as subsets of the large scale setup.
A large scale system typically consists of: main Left (L) and Right (R) V-DOSC arrays and Left-Left (L-
L), Right-Right (R-R) offstage fill arrays. Each of the four V-DOSC arrays can have associated 2-way
dV-DOSC downfill enclosures and SB218 subwoofers therefore requiring 6 channels per array: 3 for
V-DOSC, 2 for dV-DOSC and 1 for subwoofers.
Discrete drive for all 4 arrays allows maximum flexibility for time alignment, separate array
equalization and stereo imaging (for example, using console matrix sends and panning R channel
program to the L-L array and L channel program to the R-R array can provide stereo imaging on a
larger scale). Since there are 4 arrays and 6 channels per array, control signal distribution requires 24
channels total. Three lines per channel (+ve, -ve, ground) and additional lines for future amplifier
remote control account for selection of the 84-pin Whirlwind MASS W6 connector as the suggested
standard multipin connector for control signal distribution. Similarly, 6 channels per array (18 lines
total) account for the selection of the 19-pin CA-COM connector.
The CO 24 Control Output panel is used for assigning crossover outputs to the MC2875 multicore
drive snake which runs from the control rack at the front-of-house mix position to the stage. Note:
since the MASS W6 connector is ''hermaphroditic'', MC2875 drive snakes (standard 75 metre length)
can be conveniently extended for longer cable runs. At the stage end, the MD 24 Multi Distribution
panel allows breakout from the multicore and subsequent connection to the appropriate amplifier
racks for L-L, L, R and R-R arrays. COMB connectors allow individual amplifier racks to be
configured for driving dV-DOSC, V-DOSC, subwoofers (or other 2-way fill enclosures such as ARCS
provided that the correct preset has been selected).
dV-DOSC dV-SUB Manual V2.0 Nov 2001 45