Matrix Switching System
—
User Manual
22
8.0 Communication Protocol/Control Command Code
Communication Protocol:
Baud rate 9600bps, no odd or even calibration bit address,
8bit transmission address, 1bit stop address. Please refer to the
“Command list.pdf”
in
the CD-ROM for more relative
Command Code
information.
9.0 Troubleshooting
1. What to do if the HDMI matrix front panel keys switching not responsive?
Answer:
The HDMI matrix front panel keys employ scanning testing and require longer
response time. Press the keys for 2 seconds and then release. This way, key
switching will be responsive in operation.
2. What to do if matrix does not display or color display is abnormal after hot plug?
Answer:
Switching of the matrix system goes through the IC chips. If the voltage
difference between the input signal equipment and the matrix equipment is too
large, hot plug could easily cause damage to the IC chips. Please turn off
power to the system before plugging or unplugging.
3. What to do if loss of color reproduction happens or no video signal output?
Answer:
Please check if connectors at both ends of the HDMI signal cable are correctly
connected.
4. What to do if the serial port (usually refer to the computer serial port) fails to control the
HDMI matrix?
Answer:
Check that the communication port set by the control software is correctly
connected to the corresponding serial port of the equipment. Also, check if the
computer communication port is in good order.
5. What to do if the corresponding graphics fail to output during HDMI matrix switching?
Answer:
(1) Check if there is signal on the input end. If there is no input signal, it could be that the
input connection cable is broken or the connector gets loosen. You are advised to
replace the connection cable.
(2) Check if there is signal on the output end. If there is no output signal, it could be that
the cable is broken or the connector gets loosen. You are advised to replace the
connection cable.
(3) Check if the output port number is the same as the controlled port number.