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8x2 Video Matrix Switch
6.2 Configuring for Dual-head Display Devices
If you are using computers with dual-video outputs, you can configure
the VSM-802B to display the video outputs from 4 PC's on to a single
dual-head display.
Connect the left video output of all PCs to inputs #1 through #4, and
the right video outputs to inputs #5 through #8 respectively. Then
connect the "A" output from the switch to your left display device and
the "B" output to the right one.
Connect a PC to either keypad port on the switch using a Straight-
through DB9 M/F cable. Configure a terminal-emulator software, such
as Windows HyperTerminal ™ per settings mentioned in the previous
section.
Type the letter P and the following menu will appear on the screen:
Select Switching Mode
N = Normal
T= Tandem (used for dual-head displays)
Press T on the keyboard; the switch will respond with "Tandem mode
selected". The switch will permanently stay in this mode until you
change it back to normal by performing the same procedure and
selecting N.
Now you can use one of the keypads to select any of the PCs for
display. The keypad must be plugged into "Keypad A" port of the
switch. Buttons 1 through 4 are used to make the desired PC selection.
Buttons 5 through 8 are inactive; however pressing buttons 9 and 10
together will still blank the outputs. When the switch is configured for
tandem mode, you can still use an external serial device (either by itself
or together with a keypad), to control the switch. The command string
is simplified to: Ix (where x is 1 through 4).
