Hall Research DVS-4A - Manual (Page 13)

4-Port DVI Switch with Audio & Serial Control
11
ASCII ‘4’ (Hex 34 or Decimal 52)
Selects Video input #4 (immediately and unconditionally).
If the unit was in AUTO mode, then MANUAL mode is
selected.
The device will respond with: Video 4 selected
ASCII ‘A’ or ‘a’ (Hex 41/61 or Decimal 65/97)
Enters Auto mode.
If the unit was already in AUTO mode, the unit will
respond with the message:
Auto mode already selected
If the unit was in MANUAL mode, the user must select the
desired detection method by entering a number from 1 to
3 within 20 seconds. Values outside this range or delaying
entry longer than 20 seconds will result in an error
message: Invalid entry! Current detection stays the
same.
The device will respond with:
Auto mode selected
Detection Method
-----------------------------
1 = Vertical sync
2 = 5V Power
3 = Vertical sync & 5V power
-----------------------------
Current detection is [3] (1-3)?
In Auto mode, the device automatically switches to the video
& audio input source that is active.
“Active” means that video signal has sync signal, it does not
mean there is a non-static screen!