DVI /Audio Matrix Switcher 16x16
PTN Electronics Limited
10
www.PTN-electronics.com
Figure 7-1 EDID Hand-shake Communication
The MDV 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.
7.2. EDID management of MDV matrix
7.2.1. RS232 Commands for EDID Management
1)
The RS232 commands for EDID management of MDV matrix models include:
”EDIDMInit.” and”EDIDM[X]B[Y].”, (Please notice the text-transform, and the
dot in behind.)
When we send the “EDIDMInit.” to the MDV matrix switcher, it will recover the
factory
default EDID data. The feedback is “EDIDMInit”.
When we send the RS232 command “EDIDM[X]B[Y].”. The matrix will copy the
EDID data of output[X] to the input[Y]. The feedback is “EDIDM: [X]To[Y]”.
2)
When a RS232 command is correctly sent, all the connected displayers will be
blank for 3 seconds and recover again. And, the MDV matrix switcher will send
out the RS232 feedback command.
3)
If all these symbols works, it means the action is taken.
7.2.2. EDID hand-shake priority
The EDID refresh ports have the priority grade, ranging from output 1 to output 16 in
priority order. It means the output 1 is the most prior to exchange the EDID data, and
then the output 2 is the second prior. And, the output 16 is the least prior.
