User`s guide

SWITCHERS
8
OPERATION 7
7.1 SETUP
7.1.1 SETTING “POWER-ON” DEFAULTS
In some applications, it may be desirable to
force the switcher to select particular inputs and
audio-follow features when the system is
powered on.
The default input selection for all sources upon
powering up the MX2222AT is Input 1. The
MX2222AT allows the user to set ”power-on”
inputs for RGBHV, VIDEO, and AUDIO
independently.
To set the default for each source type, press
and hold the desired input for approximately 3
seconds. The MX2222AT will beep. This default
will be stored in memory until it is changed or
until the unit has been reset to factory defaults.
The user may wish to enable the audio-follow
features of the MX2222AT for a particular
setting at power up. To set these defaults follow
this procedure:
1. Select either RGBHV+AUDIO or
VIDEO+AUDIO and make sure that the
appropriate LED is on.
2. Press and hold the desired feature for
approximately 3 seconds until the
MX2222AT beeps to indicate that it has
stored this setting into memory.
If you wish to have both audio-follow features
enabled upon power-up, follow the procedure
above for each button.
7.1.2 SETTING RGBHV AUTO-SWITCHING
To set the MX2222AT to auto-switch upon
sensing an active signal on one of the two
RGBHV inputs, use the following procedure:
Reset Unit
1. Unplug or turn OFF power to the unit.
2. Press and hold the STAND BY button while
plugging the unit back in (power on).
Set Auto Switch.
3. Unplug or turn OFF power to the unit.
4. Press and hold Input 1 in the RGBHV section
on the front panel while plugging the unit
back in (power on).
In auto switch mode, the default input is Input 2.
When an active source is sensed on the red,
green, blue, horizontal sync, or vertical sync
channels of one of the inputs, the MX2222AT
will select that channel. When two active
sources are present, on both Input 1 and Input
2, the MX2222AT will select Input 1.
Note: The MX2222AT detects signals on all of
the video and sync channels, therefore it
can also be used for RGsB, and RGBS
signal formats as well.
When the MX2222AT is set to auto switch
RGBHV, the audio-follow features will perform
as follows:
”RGBHV +Audio” OFF. ”Video + Audio” OFF
In this mode, the video and audio channels can
be controlled independently of each other.
”RGBHV +Audio” ON. ”Video +Audio” OFF
In this mode, audio follows RGBHV input
selection. The audio channel can not be
independently selected; it will always auto-
switch with RGBHV. The video channels remain
independent.
”RGBHV +Audio” OFF. ”Video +Audio” ON
In this mode, audio follows the video input
selection. The audio channel can still be
independently selected until the video is
selected. The RGBHV channels are completely
independent.
”RGBHV +Audio” ON. ”Video +Audio” ON
This mode is not recommended and should not
be used.
7.1.3 SETTING C-VIDEO AUTO-SWITCHING
To setup the MX2222AT to auto-switch upon
sensing an active signal on one of the two video
inputs, follow the following procedure:
Reset Unit.
1. Unplug or turn OFF power to the unit.