Atlona AT-HD4-V41 user manual Command, Internal EDID, External EDID, Learned EDID, atlona.com

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 output
x2AVx1	x2AVx1	Route input 2 to the output
x3AVx1	x3AVx1	Route input 3 to the output
x4AVx1	x4AVx1	Route input 4 to the output
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 output
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-V41 has 3 EDID modes. Internal picks the highest common audio/visual signal between the devices and the available supported EDIDs within the switcher. External selects the highest common resolution between the current input and the display. Learned saves the EDID from the current display and locks it to the output.

When switching between EDID modes the unit will need to be power cycled. To power cycle the power cord will need to be unplugged and plugged back in.

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-V41 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. When switching from internal to external EDID modes, press the EDID button so the external LED illuminates, then power cycle the unit. When the AT-HD4-V41 is turned back on it will sync with the display and determine the EDID.

Learned EDID

Learned EDID allows for a display’s EDID to be saved to the switcher’s nonvolatile memory. To learn the EDID from the display you first need to be in external EDID mode. Once you’re in external EDID, power cycle the unit then press and hold the EDID button until the red copy LED illuminates. Power cycle the AT-HD4-V41 again and the display’s EDID will be used.

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