HK Audio CAD 208 - Handbuch (Seite 15)

15
Operating the System
We recommend that you follow the procedure described to help prevent errors
and quickly troubleshoot problems. The adverse affect of a mid/high cabinet
dropping out or an incorrect connection can seriously degrade any system’s
performance, especially that of a line array!
5.6 Connecting Speaker Cords
Always lay out cables clearly and orderly. You should be able to readily identify
which enclosure connects to which power amp channel at any time. This en-
sures flaws such as defective cords can be pinpointed and redressed quickly.
5.7 Checking Individual Mid/High Enclosures
The best method of checking cabinets is to play a familiar track on a CD (for ex-
ample, the latest HK Audio demo CD), routing the signal into the mixer and out
via the master channel. Set the master level to a low to medium setting.
Turn up the given channel’s gain knob. You will hear the signal rendered by the
two connected mid/high cabinets and the assigned controller should indicate
the incoming signal level.
Important note: If you are located outside the high frequency signal’s directivity
coverage, you will not be able to hear this signal! This system check is best per-
formed with a helper positioned a suitable distance from the array. If you see
the bottom of the mid/high unit as a flat surface, you are definitely outside its
directivity coverage.
Turn the power amp channel’s gain knob back down after hearing the signal.
Follow the same procedure for all other power amp channels that you wish to
use. Be sure to turn the gain knob down after each successful test.
Note: This procedure checks mid/high cabinets in descending order; that is,
from top to bottom. A cabinet’s height affects its directivity, so the lower the
enclosures, the closer the listener should move in towards the array.
Follow the same procedure to check subwoofers.
Once you have checked all cabinets successfully, turn up all gain knobs, one
after the other.
Start with the channel 1 gain knob for the top mid/high units, and then turn up
the channel 2 gain knob, and so forth. With every additional channel that you
activate, you should hear a boost in low midrange response. If not, this may be
due to a phase inversion in the NF (or in extreme cases, in the speaker cords).
Proceed in the same manner for the subwoofer channels.
5.8 Configuring the Controller Network Using Audio
Controller Software
Once you have performed these tests, you can configure the controller network.
The type and size of the configuration of course depends on the given sound
reinforcement task (PA left/right, center, out-fills, etc.).
Read the chapter on controller software in the manual to learn more about net-
working controllers, creating groups, and setting delays and levels.
6 Tearing Down and Transporting the
System
To tear down the system, start where you left off and work your way backward;
that is, proceed in the reverse order of assembly.
These tips should make the job of tearing down the mid/high array easier if you
use cases for your CADIS™ system:
Lower the array until the bottom of the case for mid/high units fits under it.
Engage the motor or chain hoist to relax the tension on the strap that is curving
the array. Caution: The array may swing out towards the front!
Disconnect at least the four lower cabinets’ cords.
Set the Set Angle pins that are determining the array’s curving to 0°! This en-
sures the array will not buckle when lowering and setting it on the bottom of the
case. This also makes it easier to dismantle the four-cabinet block.
Always insert the front pins into the holes on the rigging connector to ensure
they are not damaged or torn off when the array is lowered into the case!
Carefully lower the array into the case. First remove the rear Link pin connecting
the two mid/high units. Then remove the two front pins. Raise the array slightly
so that the lower four-cabinet block can be rolled away.
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