Extron electronic MPS602 Switch User Manual


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Microphone Controls
Mic Mute and Volume
Mic volume andmute are controlled from the front panel. The micmute button toggles the
mic input on or off. The corresponding red LED lights when mic volume is disabled (muted).
When the mic input is unmuted (enabled), it ismixed with the program audio output at a
level set by the mic volume rotary encoder. Mic volume is adjusted at a rate of 1dB per
step of the control. Clockwise rotation increases and counterclockwise decreases the mic
volume.
1
MODE
2
SINGLE
1
SEPARATE
2
COMBINE DVI/HDMI
1 21 2 3
MUTE
MPS 409
DIGITAL MEDIA PRESENTATION SWITCHER
MUTE
VIDEO INPUTSHDMI INPUTS
MIC
PROGRAM AUDIO
DVI INPUTSVGA/YUV INPUTS
CONFIG
EXEC
MODE
Figure 15. Mic Volume andMute
Talk-over
The MPS602 also features talk-over to automatically reduce program audio volume
whenmicrophone audio is present. When the switcher detects an audio signal from the
Mic input, it immediately reduces or "ducks" the program audio volume. Whenmicrophone
audio is not detected for a period of onesecond, it increases the program audio level at a
rate of 3 dB per second until the program audio returns to the original volume level.
Ducking is adjustable from 0 – 30dB (default is 6dB) through SIS control only. Mic level
threshold, the level at which ducking is initiated, is adjusted from 0 – 30dB through SIS
control only (see Mic talk-over threshold on page30).
Settingmic talk-over threshold
Microphone threshold and program audio ducking levels can only be adjusted using RS-232
or USB control (see Remote Communication and Control on page22).
1. Adjust program audio for nominal listening levels.
2. Turn on themicrophone by pressing the Mic Mute button (mute LED goes out).
3. Speak into themicrophone in a normal voice. Themain program level drops
immediately.
a. If themicrophone consistently cuts off the beginning of speech, or cuts out sections
of audio, adjust the threshold level using RS-232 control (see Mic talk-over
threshold on page30).
b. If the program level is too high during talk-over, but is the proper level for times
where talk-over is not active, adjust the ducking level (see Program audio
ducking level in talk-overmode on page29).
4. Stop speaking into themicrophone. Themain program audio gradually (within 2to4
seconds) increases to the previous level. If not, increase the threshold level (see Mic
talk-over threshold on page30).
MPS602 • Operation 18
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