5. Device Concept MMX8x4-HT series – User's Manual 48
Serial Port Operation Modes
The block diagram of the Serial interface
*In MMX8x4-HT400MC and MMX8x4-HT420M models.
Disconnect mode
This mode is for control the third-party device from the Matrix. In this case, the Matrix does not receive
RS-232 messages but sends serial data from the CPU.
The concept
Settings
The Matrix can send RS-232 commands over the local RS-232 ports (P1 or P2) to the HDTV
details about serial message sending in the section.
Control mode
The incoming data from the given port is processed and interpreted by the CPU. The mode allows to control
Application example of control mode
The concept
The System controller sends commands to the Matrix, which set the video and audio properties. The Matrix
executes the commands and transmits the video signal to the sink.
Settings
The System controllerP1 or P2) of the Matrix. In
control mode, the commands are processed in the device. This function makes possible to set the crosspoint
or a volume level etc.
Command injection mode
In this mode, the matrix works as an RS-232–Ethernet bidirectional converter. The Ethernet packets are
this purpose.
E.g. the default Command Injection port number of the local RS 232 port (P1) is 8001. If a command is
the local RS-232 port. That also works in the opposite direction.
In MMX8x4-HT420M model, the method is the same on the serial interface of the TPS port. Sending message
from a remote TPS device via TPS port to the RS-232 port of the matrix is also possible, but connecting the
Ethernet link to the TPS port with patch cables is needed.
Application example of command injection mode
See the RS-232 settings in Factory Default Settings section.
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