Specifications

2
English –
GAIN CONTROL
Input Gain
The gain control knobs 1–4, located on the front panel, adjust
the gain for both microphone and auxiliary-level inputs of chan-
nels 1–4 (see Figure 1). For example, the channel 1 gain control
is used for both the channel 1 microphone input (MIC LEVEL IN-
PUT 1) and the channel 1 auxiliary level input (AUX LEVEL IN-
PUT 1). The auxiliary gain control knob (AUX IN) affects only the
auxiliary input (AUX IN).
Output Gain
The master output gain control knob (MASTER) adjusts gain
to both the XLR balanced output (MIC/LINE LEVEL) and the aux-
iliary level output (AUX LEVEL).
Channel 1
Auxiliary Channel
Master Output
Channel 2
Channel 3
Channel 4
GAIN CONTROL
Figure 1
OUTPUT LEVEL METER
The six LEDs on the front panel labeled OUTPUT LEVEL
METER illuminate to reflect the peak level of the mixed output sig-
nal from the SCM268 (in reference to balanced line output) in dBu
(0 dBu = 0.775 V).
Use the master gain control (MASTER) to adjust peak levels,
as indicated by the LEDs. The red LED illuminates when the out-
put is 2 dB below clipping.
GREEN—Nominal RED—Clip
Peak Level
in dBu
PHANTOM POWER
When the phantom power switch on the back panel is on
(12V PHANTOM—ON), the SCM268 provides 12 V of phantom
power to each XLR microphone input. The switch is recessed to
prevent accidental engagement. Most
condenser microphones
require phantom power. Use it when connecting these types of
microphones to the SCM268.
NOTE: Phantom power does not affect the operation of balanced
dynamic microphones. With phantom power on, they can be con-
nected to the SCM268 in combination with condenser micro-
phones that do use it.
Phantom Power Switch
OFF ON
OUTPUT LEVEL SWITCH
The output level switch on the back panel (MIC/LINE OUT)
sets the level of the balanced XLR output. When set to MIC, it re-
duces the output by about 50 dB. Set the switch so that the output
level matches the input level of the device to which you are con-
necting the SCM268. The switch is recessed to prevent acciden-
tal engagement.
NOTE: The output level switch does not affect the auxiliary output
(AUX OUT) level.
Output Level Switch
LINE MIC