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Simple Instruction Set Control
Host-to-Switcher Instructions
The switcher accepts SIS (Simple Instruction Set) commands through the RS-232 port. SIS
commands consist of one or more characters per command field. They do not require any
special characters to begin or end the command character sequence. Each switcher response
to an SIS command ends with a carriage return and a line feed (CR/LF =
]
), which signals
the end of the response character string. A string is one or more characters.
Switcher-initiated Messages
When a local event such as a front panel operation or an IR 501 command string occurs, the
switcher responds by sending a message to the host. The switcher-initiated messages are
listed below (underlined).
The switcher does not expect a response from the host, but, for example, the host program
might request a new status.
(C) COPYRIGHT 20yy, EXTRON ELECTRONICS “MVX nn VGA/A Series”, Vx.xx
]
The copyright message is initiated by the switcher when it is first powered on.
Vx.xx is the firmware version number. “nn” is the matrix size (such as 88, eight inputs by
eight outputs).
Qik
]
The switcher initiates the Qik message when a front panel or IR 501 tie creation has
occurred.
Sprnn
]
The switcher initiates the Spr message when a memory preset has been saved from the front
panel or under IR 501 control. “nn” is the preset number.
Rprnn
]
The switcher initiates the Rpr message when a memory preset has been recalled from the
front panel or under IR 501 control. “nn” is the preset number.
Inn Audxx
]
The switcher initiates the Aud message when a front panel input audio level change has
occurred. “n” is the input number and “xx” is the dB level.
Zpa
]
The switcher initiates the Zpa message when a reset of all audio input levels to 0 dB has
been initiated from the front panel.
Exen
]
The switcher initiates the Exe message when the front panel security lockout (executive
mode) is toggled on or off from the front panel. “n” is the executive mode status: 1 = on, 0
= off.
Vmtn 1
]
The switcher initiates the Vmt message when an IR 501 remote control output video mute
command has occurred. “n” is the output number and “1” indicates the mute function is
turned on (the output is muted).
Amtn 1
]
The switcher initiates the Amt message when an IR 501 remote control output audio mute
command has occurred. “n” is the output number and “1” indicates the mute function is
turned on (the output is muted).
MVX 44 / 48 / 84 / 88 VGA Matrix Switchers • Remote Operation 37