Error! Style not defined.
_________________________________________________________________________________________________
p.3
Quick ref guide
Alpha TDcontroller
Release : 0
Date : 03/12/99
III. Rear Panel
III.1. Audio Inputs
Signal is applied between pins 2 and 3, pin 1 being grounded. As a result of the balanced nature of the
outputs (and providing that balancing is respected by way of the connection to the amplifier), there is no
hot or cold pin - the TDcontroller being neutral regarding the polarity of the signal.
III.2. Earth Lift
The push button labeled « Earth Lift » allows connection (depressed position), or disconnection (out
position) between the signal ground and the mains earth, which is itself linked to the chassis. Using this
button may help to eliminate hum due to ground loops created in the system.
III.3. Audio Outputs
The audio outputs are the three 3-pin male XLRs located in the area labeled Audio OUT.
Signal is applied between pins 2 and 3, pin 1 being connected to ground.
When used with an amplifier with balanced inputs Amplifier, the wiring of the output XLR is simply pin to
pin (1 to 1, etc..), the polarity of the signal being thus respected if the source connected to the input is
also balanced.
III.4. Output Level Switch
The three gain values available are +10/+6/0 dB.
+6dB is the recommended factory setting.
III.5. Sense inputs
The sense inputs of the three channels are arranged on a six pole barrier strip set into the rear panel
within the area labeled Sense IN. The Sense inputs are intended for the output signals of the amplifiers
driving one cabinet each of the channel being used.
Input sense connection is obligatory for proper operation of the servo-control system. cabinets will NOT
BE PROTECTED AT ALL if the sense lines are not connected.
III.6. Voltage selector
According to CEI65 and UL1419 norms, an external voltage selector is provided at the back of the unit. It
will allow the controller to works under both normalized voltage (230V and 115V).
WARNING : Changing the voltage rate means also changing the fuse and power cord.
(Safety
norms concerning cables are changing according the voltage)
III.7. Fuse holder
When necessary the fuse should be replaced in any case by a fuse of the same rating
•
for 230V : T100mAL250V
•
for 115V : T200mAL250V
