User guide
Input Selection — Single Switcher Mode
In single switcher mode (default) the switcher emulates a single nine input switcher (9x1). In 
this mode, when an input is selected from any group, the green LED indicator to the right of 
the button lights, and the selected input (video and audio) is routed to the output for that 
group. The selected audio is also connected to the program audio output. All other outputs, 
(except program audio) are muted. 
1
MODE
2
SINGLE
1
SEPARATE
2
COMBINE DVI/HDMI
1
2
1
2
3
MUTE
MPS 409
DIGITAL MEDIA PRESENTATION SWITCHER
MUTE
VIDEO INPUTSHDMI INPUTS
MIC PROGRAM AUDIO
DVI INPUTSVGA/YUV INPUTS
CONFIG
EXEC
MODE
LED blinking
Figure 13. Front Panel Input Selection-Single Mode
In the example, HDMI input 3 video and audio, (indicated by the blinking LED), is selected. 
All other input LEDs are off. To select a different input, press the desired input button. 
Input Selection — Separate Switcher Mode
There are four input selection groups on the front panel: VGA/YUV, DVI, HDMI and 
(composite) Video. These groups correspond to the four independent A/V switchers (in 
separate switcher mode) available. 
Each input group has two (three for HDMI) numbered input selection buttons, allowing 
selection from among the input sources in that group.
The output of each of the four groups is always active and the selected input audio/video 
is available on each group’s output. Program audio output is taken from the most recently 
selected input. That group (input) is indicated by a flashing LED, while the other groups are 
indicated by solid LEDs. See Program Audio on page 15 for more details.
In the example below each group has an input selected. In addition, the blinking LED 
indicates which input audio is also routed to the program audio output.
1
MODE
2
SINGLE
1
SEPARATE
2
COMBINE DVI/HDMI
1
2
1
2
3
MUTE
MPS 409
DIGITAL MEDIA PRESENTATION SWITCHER
MUTE
VIDEO INPUTSHDMI INPUTS
MIC PROGRAM AUDIO
DVI INPUTSVGA/YUV INPUTS
CONFIG
EXEC
MODE
LED
Lit
LED
Blinking
LED
Lit
LED
Lit
Figure 14. Front Panel Input Selection-Separate Mode
Program Audio Breakaway
Both separate and single switcher modes provide audio breakaway allowing routing of the 
audio signal from any input or input group to the program audio output independently from 
the video signal. It is available via software control only. See Program Audio Breakaway 
on page 23 
MPS 409 • Operation 13










