Camco Vortex Series - Power Supply and Precautions; Volume Control and Gain Settings

4 OPERATION
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CAMCO PRODUKTIONS- UND VERTRIEBS- GMBH
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    
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USER MANUAL
VORTEX 3 QUADRO
P.18
USER MANUAL
VORTEX 3 QUADRO
P.19
4.1 Precautions
Only connect the VORTEX amplier to an appropriate AC circuit and outlet,
according to the requirements indicated in the second row on the rating
plate.
Exemplary a rating plate of VORTEX 3 QUADRO
Power Supply Data:
Voltage Mains Frequency Current
Power
Consumption
VORTEX-3-QUADRO 100 V
VORTEX-3-QUADRO 120 V 50/60 Hz 24 A 1800 W
VORTEX-3-QUADRO 220 V 60 Hz 7,8 A 1070 W
NOTE: Even under normal conditions the mains current can reach levels
up to 60 A (230 V) and 120 A (120 V), respectively; this could cause lamps
to icker if connected to the same mains as the amp. The impedance of
the AC circuit should be less than 0.157 Ohms to avoid icker according
to EN61000-3-11. (Electromagnetic compatibility – section 3 – 11: limits;
limitation of voltage changes, voltage uctuations and icker in the public
LV supply; equipment and appliances consuming more than 75 A current
are subject to special conditions for connection/installation) If in any
doublt, consult your local power provider. Never attempt to measure this
impedance level with your ohmmeter. This may damage your meter and
expose you to the risk of electric shock!
4.2 Controls
4.2.1 Volume Control
Two microprocessor-controlled DCAs (Digital Controlled Attenuator) with a
control resolution of 12 bits per channel is integrated into the signal path. This
means that the signal is not subject to an A/D followed by a D/A conversion with
associated losses. Each channel is governed by a linear potentiometer with 41
notched settings. These settings have been selected to correspond to human
hearing characteristics (logarithmically) and therefore guarantee an optimal
range of settings for practical applications. Each channel can be set individually
except when operating in mono mode whereby only ChA (C) is active.
Using an intelligent DCA control (Digital Controlled Attenuator) instead of
the “conventional” VCA results in considerably reduced distortion as well as
improved noise characteristics.
Set the volume to zero before turning on the amplier to prevent the occurrence
of sudden high volume levels which may cause damage to your hearing and/or
the speakers.
The volume pots are also used to set the CAI-address. (See 5.2.2 CAI Address
Settings)