Hall Research VS-2X2 - Manual (Page 5)

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4
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When you turn the unit on the following menu appears:
Version x.x
Copyright 200x
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M E N U
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1 = #1 Input
2 = #2 Input
a = Auto mode
b = Blank
u = Un-blank
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Control Codes (1 byte commands from external control device)
Ascii 1 (or Hex31)
Selects input #1 (immediately and unconditionally). The device will respond with:
In #1 Selected
If the previously displayed output was input #2, then prior to switching the unit will blank the output
for a period of approximately 25 milliseconds, switch to input #1 and un-blank the output. This is
done in order to reduce or eliminate the undesired “flash of junk” on screen when the monitor is re-
synchronizing from one input to the other. Most monitors and Lcd’s do take some additional time to
re-sync to the new input and so the blanking may appear to be longer than 25 ms. The reason for
the initial blanking during the switching is to prevent a jittery screen that may appear for a fraction of
a second due to initial switching.
Ascii 2 (or Hex32)
Selects input #2 (immediately and unconditionally). The device will respond with:
In #2 Selected
If the previously displayed output was input #1, similar to above a 25 ms blanking period is
automatically inserted.
Ascii a (or Hex61)
Enters Auto Mode. The device will respond with:
Auto Mode.
In auto mode the device automatically switches to the video input source that is active. “Active”
means that video signal has sync signal, it does not mean that there is a non-static screen! If both
inputs are active, then the VS-2X2 stays on the currently selected video until the video signal ceases,
then it will switch to the other channel if there is good video present there.
Ascii b (or Hex62)
Blanks the output. The device will respond with:
Blanked output
When output is blanked, only the color intensities of the output are reduced to zero, the box still
operates in normal fashion and sync signals are still routed to the output.