Extron Electronics MVC 121 - Manual (Page 12)

MVC 121 • Introduction
Introduction
About the MVC 121
The Extron MVC 121 is an audio mixer and volume controller in
the Extron VersaTools
™ product line that mixes up to two mic
inputs (mono, balanced/unbalanced) with one main line level
input (stereo, balanced/unbalanced). Each mic input and the
main line level input have their own gain control knobs, and the
mixed output also features a volume control knob.
Volume adjustment interval varies with the speed of knob
rotation, i.e., turning the knob slowly increments the volume in
smaller steps (0.5 dB), and turning the knob quickly increments
the volume in larger steps (2.5 dB).
Two sets of outputs include a fixed output that is independent
from volume control, and a variable output that is volume
adjustable. All inputs and outputs are via 3.5 mm captive screw
connectors, and the volume settings are indicated by four LEDs.
The MVC offers RS-232 control of input gain/attenuation, and
control of output volume. RS-232 control also includes the
capability to turn the inputs and output on/off. The latest
firmware can be uploaded using RS-232 and the Extron control
program for Windows
® .
Features
Furniture, rack, and projector mountability — The Extron
MVC 121 can be mounted under a desk or other
furniture, or mounted on a projector lift with optional
brackets. Alternatively, it can be rack mounted on an
optional rack shelf.
Microphone inputs — Built-in switchable microphone amplifier
with 48 V phantom power and separate level setting for
each microphone.
Front panel security lockout (executive mode) — The volume
settings for the inputs and the output can be protected
from unauthorized changes by enabling the executive
mode, although the volume settings can still be displayed
by the LEDs when the volume control knobs are turned.
Stand-alone volume controller — The MVC 121 can operate as
a volume controller for the main line level input with
both mic inputs turned off.
RS-232 control — Allows remote control of the MVC using the
Extron Simple Instruction Set ™ (SIS ™ ), the Extron control
software for Windows, or other remote control system.
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