Extron Electronics MPS 602 Series User Guide - Manual (Page 24)

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 2 1 2 3 MUTE
MPS 409
DIGITAL MEDIA PRESENTATION SWITCHER
MUTE
VIDEO INPUTS HDMI INPUTS
MIC PROGRAM AUDIO
DVI INPUTS VGA/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