Shure SCM268E manual Input Gain, Output Gain

GAIN CONTROL

ENGLISH

INPUT GAIN

The gain control knobs 1-4, located on the front panel, adjust the gain for both microphone and auxiliary-level inputs of channels 1-4 (see Figure 1). For example, the channel 1 gain control is used for both the channel 1 mi- crophone input (MIC LEVEL INPUT 1) and the channel 1 auxiliary level input (AUX LEVEL INPUT 1). The auxiliary gain control knob (AUX IN) af- fects 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 auxiliary level output (AUX LEVEL).

Auxiliary Channel

Channel 3

Channel 1

Channel 2

Channel 4

Master Output

GAIN CONTROL

FIGURE 1

OUTPUT LEVEL METER

The six LEDs on the front panel labeled OUTPUT LEVEL METER illumi-	Use the master gain control (MASTER) to adjust peak levels, as indicated
nate to reflect the peak level of the mixed output signal from the SCM268	by the LEDs. The red LED illuminates when the output is 2 dB below clip-
(in reference to balanced line output) in dBu (0 dBu = 0.775 V).	ping.
		GREEN-Nominal	RED-Clip

Peak in dBu

PHANTOM POWER
When the phantom power switch on the back panel is on (12V PHAN-
TOM-ON), the SCM268 provides 12 V of phantom power to each XLR mi-
crophone input. The switch is recessed to prevent accidental		OFF ON
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 connected to
the SCM268 in combination with condenser microphones that do use it.
	Phantom Power Switch

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 reduces the output by

about 50 dB. Set the switch so that the output level matches the input lev-LINE MIC el of the device to which you are connecting the SCM268. The switch is

recessed to prevent accidental engagement.

NOTE: The output level switch does not affect the auxiliary output (AUX

OUT) level.

Output Level Switch

6