Gain Control; Input Gain; Output Gain; Output Level Meter - Shure SCM268 Manual

⑥ Auxiliary Input Channel (AUX IN).
A dedicated auxiliary-level input for the auxiliary channel.
⑦ Phantom Power Switch (12V PHANTOM).
Recessed switch turns on phantom power for microphone inputs 1-4.
⑧ Microphone Level Inputs (MIC LEVEL INPUTS).
Transformer-balanced, microphone-level XLR inputs.

Gain Control

Input Gain

The gain control knobs 1­4, located on the front panel, adjust the gain for both microphone and auxiliary­level inputs of chan­
nels 1-4 (see Figure1). For example, the channel 1 gain control is used for both the channel 1 microphone input (MIC LEVEL
INPUT 1) and the channel 1 auxiliary level input (AUX LEVEL INPUT 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).

Output Level Meter

The six LEDs on the front panel labeled OUTPUT LEVEL METER illuminate to reflect the peak level of the mixed output signal
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.
Figure 1
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