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Front Panel Features and Operation
All the MLS 100 A switchers share the same front panel design, shown on the right.
1
Input selection buttons and indicator LEDs — Press one of these buttons
to select the desired audio and video input. The corresponding LED lights and
remains lit while an audio-video input is selected. During audio breakaway
(selectable only via RS-232 control, described in chapter 4), audio is switched
separately from video; the selected video input LED lights steadily, and the
audio input LED blinks.
The MLS 100 A accepts only audio inputs, so pressing one of these buttons selects an audio-only input.
Input 0 can be selected via RS-232 control only by using an SIS command or by selecting Mute (shown on
the right) from the User Mode section of the control program (if the MLS is used without an MLC).
Selecting input 0 mutes the audio from inputs 1 through 4.
For all models the Aux/Mix audio input is always enabled and cannot be turned on or off from the front
panel. The Aux/Mix audio does not change when you switch between the four selectable audio inputs.
The last selected input (including audio/video breakaway selec tions) will be the active input when the MLS is powered on.
NOTE:
Wait at least 10 seconds between making a change (input selection or audio adjustment) and disconnecting
power from the MLS. The switcher needs several seconds to store the new settings in its memory.
2
Aux/Mix Level control — This potentiometer controls the auxiliary/mix audio volume. This channel audio is always output,
no matter which, if any, other audio input (0, 1, 2, 3, 4) is selected. Use a small screwdriver to turn this control while you listen
to the audio output. When the control is turned to its counterclockwise limit (-43 dB), the Aux/Mix signal is inaudible. You hear
the maximum Aux/Mix volume when the control is turned to the clockwise limit (+24 dB).
NOTES:
•
Once this level is set, the Aux/Mix level remains the same no matter which input (1 through 4) is selected, and the Aux/
Mix audio can be heard at that level even if the selectable audio inputs are muted or if audio input 0 is selected via RS‑
232 control.
•
The gain and attenuation for audio inputs 1 through 4 is adjustable only via RS‑232 control (using SIS commands or the
MediaLink Control/Configuration Software.)
The gain and attenuation for the Aux/Mix input is adjustable only via the Aux/Mix Level control.
•
Wait at least 10 seconds between making a change (input selection or audio adjustment) and disconnecting power from
the MLS. The switcher needs several seconds to store/save the new settings in its memory.
Executive Mode — Enabling and Disabling Front Panel Buttons
To disable front panel input selection (turn executive mode on), simultaneously press input selection buttons 1 and 4 and hold
1.
them down for three seconds. All LEDs light for about one second.
While executive mode is on, input selection can be performed via RS‑232 control or from an optional MediaLink Controller.
2.
To enable front panel input selection (turn executive mode off), repeat step 1 (pressing and holding buttons 1 and 4).
3.
MLS 100 Series
AUX/MIX
INPUT SELECT
LEVEL
1
2
3
4
MediaLink Switcher
1 1
2 2
5
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