PTN MHD44 User Manual download pdf (Page 9)

HDMI Matrix Switcher

PTN Electronics Limited www.PTN-electronics.com

6. Operation of the EDID management

MHD matrix switcher is built in the EDID management database. The EDID management can be

automatically shake hand, or manual exchanged, and factory restore.

6.1 EDID automatically shake hand

The MHD matrix switcher is built in the EDID data, which can communicate with the displayers and

video source automatically. When the displayers or video sources are connected to the MHD matrix

switcher, they will share the EDID/DDC information with the matrix switcher.

The communication solution is like this:

The MHD EDID database includes most popular displaying data, but not all the displaying data

because of the capability and firmware limitation. So, we can manually refresh the EDID data to update

the EDID data base.

6.2 EDID management of MHD44

The RS232 commands for EDID management of MHD44 include: ”EDIDMon.” & ”EDIDMoff.” (Please

notice the text-transform, and the dot in behind.)

These two commands only accept by MHD44, in the other MHD matrix models they are unavailable.

6.2.1 Erase and Refresh the EDID data

When the “EDIDMOn.” is sent, MHD44 will auto copy the mix EDID data of all outputs. It means the

MHD44 will erase the old EDID data, and copy the EDID data which all output displays have.

6.2.2 EDID restore to factory default

When we send the “EDIDMoff.” to the MHD matrix switcher, it will recover the factory default EDID data.

6.2.3 RS232 feedback:

When the “EDIDMOn.” or “EDIDMoff.” is correctly sent, all the connected displayers will be blank for

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PTN MHD44 User Manual Page 9