Hall Research DVS-2A - Manual (Page 10)

2-Port DVI Switch with Audio & Serial Control
8
. Priority Selection in Auto Mode
The priority button is used to select the priority as NONE or as INPUT 1.
This priority selection only applies to Auto mode. If INP 1 priority is
selected, the DVS-2A will automatically select ‘Input 1' whenever it
detects the presence of video at ‘Input 1’ connector, regardless of what is
happening at the ‘Input 2’ connector.
For example, if the ‘Output’ is playing the video & audio from ‘Input 2’
and video from ‘Input 1’ is detected, the output of the DVS-2A will
change to select ‘Input 1’ video immediately. With priority set to none,
the unit stays selected to the current input as long as it is detecting video
there.
. Long Cable Equalization
The use of long DVI cables can cause the ‘Video’ image to degrade to
unacceptable levels.
By pressing and holding BOTH the ‘Mode SELECT’ and ‘Priority
SELECT’ buttons for 3 seconds, the video boost circuit will be enabled
and the LED’s will flash momentarily acknowledging the selection was
changed. Both of the GREEN LED’s flash when the BOOST is enabled
and the RED LED’s flash when the BOOST is disabled.
. RS-232 Control Port Usage
The DVS-2A can also be controlled via a serial device. The unit operates
at a baud rate of 4800 bps. From the serial port, you have full control
over the operation of the switched output, mode, and priority buttons.
Note on the RS-232 port availability on your PC
Most PCs and notebooks do not have a
serial port. So to program the Switch you
may need a USB to RS-232 Serial
converter. These are available from Hall
Research Technologies (Model USB-
RS232-1).