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Command
The command codes are very sensitive, do not change capitalization, spacing, or lettering.
Command
Feedback
Description
PWON
PWON
Power on
PWOFF
PWOFF
Power off
x1AVx1
x1AVx1
Route input 1 to the outputs
x2AVx1
x2AVx1
Route input 2 to the outputs
x3AVx1
x3AVx1
Route input 3 to the outputs
x4AVx1
x4AVx1
Route input 4 to the outputs
AUTOON
AUTOON
Turns the auto switching feature on
AUTOOFF
AUTOOFF
Turns the auto switching feature off
Status
x1AVx1
Displays which input is currently connected to the outputs
Mreset
Mreset
Returns the switcher to its default settings
VER
V0.91a
Displays current firmware version
Each command or feedback is terminated with a carriage return.
Note: If the command fails or is incorrect the feedback should be “Command FAILED”
EDID
(Extended Display Identification Data)
EDID is the exchange of capabilities between a source and display. This handshake ensures the audio
and video signals sent are supported by both source and display.
The AT-HD4-V42 has 3 EDID modes. Internal picks the highest common audio/visual signal between
the devices and the available EDIDs within the switcher. External selects the highest common
resolution between the current input and the display connected to output 1. Learned saves the EDID
from the current output 1 display and locks it to the output.
Internal EDID
The Internally loaded EDID settings are the most common A/V signals that come standard in most TV
displays and computer monitors. The AT-HD4-V42 will pick the highest common resolution between
the devices.
External EDID
External EDID is the highest common audio/video signal between the current source device and
display. It is useful for devices with uncommon resolutions that are not stored internally.
Learned EDID
Learned EDID allows for a display’s EDID to be saved to the switcher. The saved EDID will not reset
when power cycled or the display is replaced.
NOTE:
Hold the EDID button for 5 seconds to save a new EDID to memory.
