Atlona AT VGA0505 - Manual (Page 7)

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CHANNEL CONTROL
Method A: Operation by Control Software via RS-232 serial port
1
Scan
This button will trigger the automatic search over all the available COM ports
(1-255). If the matrix is detected, a successful message window will show up.
Otherwise, an error message will show up (see below). Please keep in mind
that a successful connection can be established only if there is at least one
COM port available.
2
Open
Open the COM port after scan to establish the connection between PC and the matrix.
3
Close
Release the COM port after scan.