4. Device Concept
UMX-HDMI-140 series– User's Manual
26
Applied firmware package: v1.2.0 | LDC software: v2.4.1b7
4.4.
Video Interface
4.4.1.
Video Input Modes
The device can receive digital video signal on the HDMI, DisplayPort, and DVI-D input ports and analog video
signal on the VGA and the DVI-A input ports.
INFO:
Both the DVI-A and DVI-D signals can be received on the same DVI-I input port.
4.4.2.
Input Source Selection Modes
Video input source can be selected the following ways:
▪
pressing
Video Select
button on the device;
▪
using Lightware Device Controller (LDC);
▪
sending LW2 or LW3 protocol commands; or
▪
using the
Autoselect
function.
The Autoselect Feature
There are three types of Autoselect as follows.
▪
First detect mode
: selected input port is kept
connected to the output as long as it has
an active signal.
▪
Priority detect mode
: always the highest
priority active input is selected to transmit.
▪
Last detect mode
: always the last attached
input is selected to transmit.
Flowchart of Autoselect modes
New event?
„First detect”
„Last detect”
No Audio/Video
transmission
Remains
selected
Last connected
input is selected
Y
„Off”
N
N
Current
Autoselect mode
„No signal”
Port with
priority 0 has a
valid signal?
Selected
port still has a
valid signal?
„Priority detect”
Port with
priority 1 has a
valid signal?
N
N
Port with
priority 30 has a
valid signal?
N
Display
Test pattern
Test
pattern generator
setting
Y
Y
Port with
priority 2 has a
valid signal?
N
Port with priority
0 is selected
Port with priority
1 is selected
Port with priority
2 is selected
Port with priority
30 is selected
Y
Y
Y
4.4.3.
Automatic Input Selection - Example
The Concept
If there is no other source connected to the switcher, but the Laptop, VGA input will be automatically switched
to the HDMI output. If the Laptop and the PC are also connected to the switcher, DVI-D input will be switched
to the HDMI output. If the Blu-ray player is connected on the HDMI input, and later the MacBook is connected
on the DP input of the switcher, it will be switched to the HDMI output – independently of the presence of
other video signals.
Settings
▪
HDMI output
: Set the Autoselect to
Enabled
. Set Autoselect mode to
Priority detect
. The priorities are the
following (the lowest number means the highest priority):
Source device
Input interface
Input port
Priority
MacBook
DP IN
I3
0
Blu-ray player
HDMI IN
I2
1
PC
DVI-D IN
I4
2
Laptop
VGA IN
I1
3
Priorities can be set in Lightware Device Controller software, see related settings in the
