Clare Controls CM-MT4420-HD, User Manual

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HDMI 4x4 Matrix Switcher User Guide 7
EDID management
The switcher has a built-in EDID management database. The EDID management
system can handle the handshake automatically, manually, or it can be set to the
factory default.
EDID automatic handshake
The EDID data management can communicate with the sources and displays
automatically. When the sources and displays are connected to the switcher, they
share the EDID/DCC information with the switcher. The communication solution is
shown below.
Figure 5: EDID communication
The EDID database includes the most common display data, but not all. This is due to
capability and firmware limitations. You can manually refresh the EDID data to update
the EDID database.
EDID management of the switcher
The RS232 commands for EDID management of the switcher includes “EDIDMon.”
and “EDIDMoff.” (Note the period at the end of the command.)
 When the command is correctly sent, all the connected displays appear blank for
two to three seconds and then recover. The switcher sends the RS232 feedback
command “EDIDMOn.” or “EDIDMoff.”.
 When the “EDIDMoff.” command is sent to the switcher, it will reset to the factory
default EDID data.
Note:
If the output[X] does not connect to an active display, the EDID management
takes no action.