Altec Lansing 3300A - Manual (Page 10)

Operating Instructions for the Altec Lansing 3300A Series Mixing Consoles
Figure 8. Rear panel switches.
the left and right subgroup
outputs. Since the 3300A series
are true subgroup mixers, all
signals that appear in the main
mix must come through the
subgroup channels.
4. MONITOR Output: The
MONITOR output signal is the
sum of all the input cheuinel
monitor sends and the external
monitor input signal.
5. AUX SEND (AVX 1 and
AVX2): The AUX SEND out­
put signal is the sum of all of
the input channel AUX sends
(PRE or POST fader) plus any
signal coming through the AUX
IN input.
6. TAPE RECORD: These
output signals are the sum of all
the input channels and effects
with their position in the L R
stereo mix. The TAPE RECORD
output is via RCA-jacks fixed at
-10 dBV for easy interfacing and
compatibility with semi-pro and
hi-fi tape decks.
4.5 Rear Panel Switches
(Refer to Figure 8.)
1. PHANTOM POWER Switch:
lliis switch turns the phantom
power supply on and off. The
phantom power supply provides
power for condenser-type micro­
phones through the microphone
cable. When switched on, it
provides 48 volts dc at pins 2
and 3 on all of the microphone
input connectors. Pin 1 (the
shield conductor) provides the
ground return path. This will
power standard condenser
microphones. When switched on
or off, the voltage will slowly
ramp up or down; it teikes a few
seconds to reach full level. This
prevents unwanted transients
from reaching the microphone
inputs. When the switch is en­
gaged, a red LED will light on
the meter bridge to confirm its
operation.
2. VOLTAGE SELECT Switch:
The 3300A series are capable of
operation at 115 or 230 Vac, 50
or 60 Hz. To seifely accomplish
a voltage change, follow tliese
steps:
1. Turn the mixer off and
completely disconr.f;;- the
ac power cord.
2. If the unit is used for 115
Vac (100—120 Vac) opera­
tion, be sure a 0.4 amp Slo-
Blo* 3AG fuse is installed
in the fuse holder on the
connector panel. If the unit
is used for 230 Vac (220—
240 Vac) operation, be sure
a 0.25 amp Slo-Blo*
10 ALTEC LANSING^ CORPORATION • a Mark IV Company