Turning Channels On/Off; On/Off Status Leds; Mute/Unmute Channel; Front Panel Security Lockout (Executive Mode) - Extron electronics MVC 121 User Manual

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Installation and Operation, cont'd
Mic 1 input volume control and on/off status LED — Turning
2
the knob clockwise will increase the gain setting, and turning
the knob counterclockwise will decrease the volume setting.
The on/off LED indicator lights whenever Mic 1 is on or not
muted, but the LED will go off after the minimum volume
setting has been reached.
The gain level is indicated by the Gain/Volume level LEDs (see
).
1
Mic 2 input volume control and on/off status LED — Turning
3
the knob clockwise will increase the gain setting, and turning
the knob counterclockwise will decrease the volume setting.
The on/off LED indicator lights whenever Mic 2 is on or not
muted, but the LED will go off after the minimum volume
setting has been reached.
The gain level is indicated by the Gain/Volume level LEDs (see
).
1
Main 3 line level input volume control and on/off status LED
4
— Turning the knob clockwise will increase the gain setting, and
turning the knob counterclockwise will decrease the volume
setting. The on/off LED indicator lights whenever Main 3 is on
or not muted, but the LED will go off after the minimum
volume setting has been reached.
The gain level is indicated by the Gain/Volume level LEDs (see
).
1
Master output volume control and on/off status LED —
5
Turning the knob clockwise will increase the volume setting,
and turning the knob counterclockwise will decrease the
volume setting. The on/off LED indicator lights whenever
master output is on or not muted, but the LED will go off after
the minimum volume setting has been reached.
The output volume level is indicated by the Gain/Volume level
LEDs (see ).
1
To prevent possible damage to audio equipment, the
CAUTION
output volume range may be specified by setting
the upper and lower limits via the Windows-based
Extron Audio Products Control Program or the SIS
commands.
See Setting output volume range limits and
Using the command/response table in
chapter 3.
www.camboard.de
MVC 121 • Installation and Operation
2-12
CAMBOARD Electronics

Turning channels on/off

On/off status LEDs

Mute/unmute channel

Front panel security lockout (executive mode)

Tel. 07131 911201
Fax 07131 911203
To turn a channel off, turn the knob counterclockwise until the
status LED goes off. To turn a channel on, turn the knob slightly
clockwise until the status LED goes on. Whenever an input/
output is being adjusted from the front panel, its on/off status
LED indicator goes on and all other on/off status LED indicators
and the Gain/Volume level LEDs go off for 5 seconds.
If no adjustment of the front panel has occurred for 5 seconds,
the Gain/Volume level LEDs will go off. All the on/off status
LEDs next to each knob will be active to indicate the current
setting (LED on indicates that the channel is on, LED off
indicates that the channel is muted or off).
A channel that has been muted by an SIS command can be
unmuted by turning the front panel knob clockwise.
For contact closure muted input, no front panel adjustment of
that input is allowed. Any attempt to adjust that input will cause
the input's status LED to blink 3 times.
Executive mode is a security feature that prevents the front
panel knobs from being unintentionally adjusted.
There are two forms of executive mode and they can only be
enabled/disabled via RS-232 commands. See chapter 3, Remote
Control, for command details.
1. Executive mode 1: The Mic 1, Mic 2, and Main 3 input gain
control knobs on the front panel are locked, although the
Gain/Volume level LEDs will still show the current gain
settings for those inputs if any of those three knobs are
rotated slightly. For a muted input, no gain/volume level
will be displayed. The individual LED for each input gain
control knob will flash three times if that knob is rotated
while in Executive mode 1.
The Master output volume control knob is not locked in
Executive mode 1.
ce-info@camboard.de
MVC 121 • Installation and Operation 2-13