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Appendix A • RS-232 Programmer’s Guide
Extron • System 4
xi
Switcher Series • User’s Manual A-2
System 4xi
-Initiated Messages
When AC power is initially applied to the System 4xi, the following System 4xi-
initiated messages (underlined) are sent to the Host:
¿(C)COPYRIGHT 1997, EXTRON ELECTRONICS SYSTEM4LQxi, V4.0¿
¿SYS 1¿ System 4xi power is ON
¿ Ax¿ x = the Audio channel number selected
¿Vx¿ x = the Video channel number selected
When the Main power from the front panel is applied to the System 4xi, the
following System 4xi-initiated messages are sent to the Host:
¿SYS x¿ (as described above)
¿Ax¿ (as described above)
¿Vx¿ (as described above)
When audio and/or video settings are changed using the front panel, the
following messages or message combinations are sent to the Host:
¿Ax¿ (as described above)
¿Vx¿ (as described above)
¿Cx¿ Both video and audio settings for channel number x have been changed
When there is a change in the audio gain setting from the front panel, the
following message is sent to the Host:
¿RECONFIG¿
*
* This message will vary depending on the System 4
xi
model.